Home

Honeywell EN2H-0221GE51 R0808 Heating System User Manual

1. 1 2 Switch off level stage g Area 1 high use start up coverage of heating demand at full load burner stages and II Switch off level stage II h Area 2 low use coverage of heat demand with partial load burner stage only Switch on level stage Il i Area 3 increased use coverage of heating demand at full load both burner stages Switch on level stage x Boiler temperature Swap of switching y Time differential Theoretical progression with stage alone Temperature drop becomes slower after every switch off of stage Il as stage provides support Switch on level stage II is no longer reached temperature is reached from stage l Temperature drops due to increased heat demand under switch on level stage Il 133 Hydraulic Components SDC DHC Time delay stage II NOTE Enabling mode stage lI 134 NOTE Hot water loading mode stage II NOTE See also Outside temperature disable Enabling of stage II full load stage is controlled not only by the switching differentials but also by a time delay In this way stage Il remains disabled for the set delay so that stage will be active longer This function is only effective during the start up phase when there is demand for both stages When stage is in base load operation and stage II in adjustment operation covering excess heat demand the latter is switched on immediately when the demand aris
2. SDC DHC Operation 5 4 14 Data bus menu BUS The parameters in this menu refer solely to the parameters that are associated with the data bus Para Designation Setting range Setting values Factory Setting meter setting 01 Central device 10 20 30 40 50 10 address 02 Bus authorisation 1 Expanded access 1 SDW 30 of direct authorisation heating circuit 2 Simple access authorisation 03 Bus authorisation 1 Expanded access 1 SDW 30 of mixed authorisation heating circuit 1 2 Simple access authorisation 04 Bus authorisation 1 Expanded access 1 SDW 30 of mixed authorisation heating circuit 2 2 Simple access authorisation 5 4 15 Relay test menu RELAY TEST In this menu the relays contained within the central device can be selected via the input button and checked for operation Para Designation Setting range Setting values Factory Setting meter setting 01 Heat generator test Different relay switching sequence depending on the set heat generator 02 Direct heating OFF ON OFF OFF circuit pump test 03 Mixed heating OFF ON OFF OFF circuit pump 1 test 04 Mixer motor 1 test STOP OPEN CLOS STOP 05 Mixed heating OFF ON OFF OFF circuit pump 2 test EN2H 0221GE51 R0808 111 messages Operation SDC DHC Para Designation Setting range Setting values Factory Setting meter setting 06
3. x 100 a 0 y 100 a Minimum travel y Controller output xX Valve travel Para Designation Range Presetti Step Unit meter ng 03 Minimum 0 50 10 1 travel Should the secondary flow temperature controller output fall below the settable minimum travel in code 03 two step operation begins and the valve is closed The valve remains closed until the internal controller output reaches 10 again If a 10 controller output is reached the valve opens again to the minimum travel If the controller output drops below 10 again the valve closes again and the cycle starts from the beginning This means that whenever there are demands of up to 10 on the heat generator the valve is operated in On Off mode and the secondary flow temperature is controlled this way Continuous heat exchanger valve control If the output of the secondary flow temperature controller rises above 10 the PI controller controls the secondary flow 145 Hydraulic Components SDC DHC temperature according to the required setpoint within its limits The Proportional Range Adjustment Time and Motor Runtime control parameters can be set in parameters 04 and 05 Para Designation Range Presetti Step Unit meter ng 04 S gain 0 1 30 5 0 1 IK 05 Adjustment O 60 3 1 min time 0 pure P controller 06 Runtime of 10 1800 120 1 S district heating valve
4. 146 EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 2 3 District heating return temperature limit EN2H 0221GE51 R0808 Many district heating companies require min volume flows in their networks This can be achieved through a high temperature differential between the flow and return 10 C 0 C 10 C a Example 1 factory setting e b Return temperature limit f c Example 2 x d Example 3 y Example 4 Starting points of the flexible return temperature limit in examples 3 and 4 Return setpoint Outside temperature 147 Hydraulic Components SDC DHC 148 By means of district heating return temperature limitation the required temperature difference is assured The maximum limit can either be a fixed value limitation or a flexible limitation according to the outside temperature A fixed value limit of e g 50 C means that the district heating return temperature will not exceed this value over the entire outside temperature range In case of higher outside temperatures it is desirable that the maximum limit can be reduced i e flexible district heating return temperature limitation is to be adopted Through the assignment to the respective outside temperature the lowest possible district heating return temperature and thus good heat exploitation are obtained The values for the maximum limitation of the district heating return temperature code 08 and the start
5. Operation SDC DHC Information Display Condition Remarks Buffer tank Setpoint Actual VO1 2 configured as Connection of PF1 to temperature at value buffer tank loading associated variable input 1 top pump or 2 VI can no longer be called up Buffer tank Setpoint Actual VO1 2 configured as Connection of PF2 to temperature at value buffer tank loading variable input VI1 VI2 or VI3 bottom pump Solar collector Actual value VO1 2 configured as Special sensor flow temperature solar tank loading pump Solar tank Actual value VO1 2 configured as temperature solar tank loading pump Solar collector Actual value VO1 2 configured as Connection of KRLF to return solar tank loading pump variable input VI1 VI2 or VI3 temperature Solar tank switch Actual value Solar loading valve activated over temperature 5 1 2 7 2 Operating states Information Direct heating circuit operating status An operating state inquiry occurs after the information menu is called up by turning the input button anti clockwise The following displays appear only under the specified conditions and may not be available depends on device version Display Condition Direct heating circuit specified Remarks Heating program Holiday Absent Til Party Til Auto Summer Heating Red Heating Standby Switching time program P1 P2 P3 control mode Day RED ECO Mixed heating circuit 1 operating
6. Fela Copy Select defaut 2 Default time Select EX heating circuit Call up ae a ie Reset eee a P1 e P2 HC 1 P3 ee Press for approx 5 seconds until Acknowledge OK appears Default program has been reloaded Individualised program is no longer available Reset HC Direct heating circuit MC 1 Mixed heating circuit 1 MC 2 Mixed heating circuit 2 DHW Hot water heating circuit EN2H 0221GE51 R0808 71 Operation SDC DHC 5 2 3 System Parameters menu The system parameters refer to general limiting parameters and specification values within the heating system Access See 5 2 Menu selection level pg 48 Returning Returning to the basic display takes place by pressing the button or automatically after the set information time see 5 1 2 7 System information button pg 35 5 2 3 1 Language selection Several languages can be selected for all information that appears in the display After selecting the language and confirming it by pressing the input button additional communication takes place in the respective language Setting values DE German GB English FR French IT Italian NL Dutch ES Spanish PT Portuguese HU Hungarian CZ Czech PL Polish RO Romanian RU Russian TR Turkish S Swedish N Norwegian Factory setting German 72 EN2H 0221GE51 R0808 SDC DHC Operation 5 2 3 2 Time program This parameter specifies enabling of the switc
7. 238 Manual call up 7 3 13 2 Function Application Manual call up of the AUTO SET function is always possible The call up is activated by pressing the input button during the version display until the AUTO SET function is shown in the display The basic display is activated after the function has been carried out A change in the function assignment by the AUTO SET function is only carried out depending on the following inputs and selected configuration Input Only executed if Outside sensor AF Flow sensor 1 VF1 MC1 OFF Mixed heating circuit valve Flow sensor 2 VF2 MC2 OFF Mixed heating circuit valve Tank sensor SF SLP OFF Tank loading pump Boiler sensor KF BR OFF Single stage The current setting values are checked beforehand so that the configuration carried out is not changed by the AUTO SET function A change is only carried out if one of the settings specified above is applicable This ensures that the AUTO SET function cannot for example ever log off a return increase at the MC2 or re function it into a mixed heating circuit Emission measurement not for DHC 43 By pressing this key the heat generator is controlled for 20 minutes according to the maximum temperature limit The remaining time is displayed and counted down With two stage heat generators both stages are in operation measurement at nominal power The heat generator is adjus
8. Relay function test Depending on the controller version various outputs can be tested This is not only a relay test but a function test by means of which the hydraulic components are tested The partially compulsory sequence of the switching procedures is considered here After selecting the test function the relevant relays can be switched one after the other by pressing the input button in the specified switching sequence Heat generator test 239 Hydraulic Components SDC DHC Single stage heat generator Heat Generator menu parameter 1 1 Switching sequence OFF ON OFF 2 stage heat generator Heat Generator menu parameter 1 2 Switching sequence OFF STAGE 1 STAGE 1 2 STAGE 1 OFF 2x single stage heat generators Heat Generator menu parameter 1 3 Switching sequence OFF HG 1 HG 1 2 HG 2 OFF Modulating mode Heat Generator menu parameter 1 4 Switching sequence OFF ON OPEN STOP CLOSED 240 Pumps VOs OFF Pump test Direct heating circuit pump mixed heating circuit pump tank loading pump variable output 1 variable output 2 Switching sequence OFF ON OFF EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Mixer motor Function EN2H 0221GE51 R0808 Mixed heating circuit actuator test STOP OPEN STOP CLOSED STOP Switching sequence For easier diagnosis by the technician a test run that detects
9. External information A temperature value sensed by a standard sensor is displayed as an information value in the information display This function is controller independent and is for information only Demand contact This function is active for a demand contact if demand contact was selected for a variable contact and a heating circuit function was assigned to the associated output The heating circuit functions are mixed heating circuit direct heating circuit constant controller and fixed value controller If a variable input see note was defined as a demand contact the corresponding parameter for assigning the contact to the respective heating circuit i e the heating circuit to be addressed by the demand contact is displayed in the System menu The setting range includes all control circuits within a controller DC MC1 MC2 HW or ALL so that the demand contact can be assigned either to each individual heating and hot water circuit or if required to all circuits 219 Hydraulic Components SDC DHC Contact function 220 A ATTENTION No global controller function for data bus system with several central devices Control modes and switching time settings are not effective when the demand contact is activated The respective heating circuit only responds to requests from the demand contact The control modes manual emission measurement with safety temperature limiter check and screed function are o
10. Hydraulic Components Activation of The modulating burner stage is activated when the heat generator modulation Adjustment Minimum burner run time Minimum and maximum temperature limit 7 1 9 Function 7 1 10 EN2H 0221GE51 R0808 temperature has dropped below the set nominal temperature by more than 1 K The burner is enabled through the burner relay As soon as the heat generator temperature crosses the switch off level the burner is deactivated in contrast to the mixed heating circuit parameters Adjustment to the setpoint temperature is realised through the conventional 2 point output activating the burner and an additional 3 point output for modulating the actuator in the burner The temperature is registered by the heat generator sensor In contrast to mixed heating circuit control no end position function is assigned to this actuator The control algorithm is running continuously The burner remains in operation for the duration of the set minimum burner runtime irregardless of temperature based switch off conditions If the heat generator maximum temperature is exceeded or the heat generator minimum temperature is undershot the same functions apply as with conventional heat generators Modulation of P part Xp The proportional part Xp defines how a step change of the setpoint effects a change of the corresponding actuator according to the new setpoint Example With a max heat generator tem
11. e Move up one menu level By turning the input button you can e Change values clockwise increases called up values anticlockwise decreases them e Navigate through menus Daytime room temperature button Sets the desired room temperature room setpoint in automatic mode during the heating cycles and in the PARTY and HEATING operating modes In operating mode 1 the set value for all heating circuits is the same In operating mode 2 the set value applies for the respective heating circuit To set the operating mode see 5 2 3 3 Operating mode pg 74 gt Press button gt Set flashing room temperature specification to the desired value by turning the input button gt Confirm set value by pressing the L button or the input button Alternative Automatic acceptance of the value after the set information time see 5 1 2 7 System information button pg 35 20 C 5 30 C EN2H 0221GE51 R0808 SDC DHC Operation 5 1 2 3 Setting Factory setting Setting range 5 1 2 4 Factory setting EN2H 0221GE51 R0808 Night time room temperature button Sets the lowered room temperature in automatic mode between the heating cycles and in the ABSENT and RED HEATING operating modes In operating mode 1 the set value for all heating circuits is the same In operating mode 2 the set value applies for the respective heating circuit To set the
12. inputs and outputs The hydraulic presetting of the inputs and outputs of the controller selected via the Hydraulics menu Parameter 01 can be adjusted individually The preset hydraulics parameters can be changed individually for this purpose Thus hydraulics not covered by the automatic preconfiguration can also be implemented A ATTENTION The hydraulic parameters define the system Changes can have far reaching effects on the way the controller works Parameter settings made elsewhere can be lost Individual adjustments must therefore be made very carefully EN2H 0221GE51 R0808 SDC DHC Control Functions EN2H 0221GE51 R0808 Only those inputs and outputs that are actually present on the controller are available for setting in the Hydraulics menu The function of the corresponding output is determined by the setting of the hydraulic parameter Example Parameter 05 defines the function assignment of the output for the direct heating circuit pump DHCP Ex works this output is set to the corresponding setting for the direct heating circuit pump If this output is assigned the circulation pump function the direct heating circuit pump function is no longer available A function can only be executed if the corresponding function is also available in the hydraulic system Example The parameters for setting the circulation pump are not accessible until the direct heating circuit pump output is a
13. Heat Buffer protection heat gene gene gene gene generator available rator rator rator rator Tank discharge Buffer Heat Buffer Heat Heat Buffer protection heat gene gene gene generator not available rator rator rator Buffer sensor 2 BS2 Buffer sensor 2 BS2 As an option the buffer tank can be equipped with the second buffer sensor BS2 via the variable inputs for stratified loading The buffer is loaded through the active heat generator as soon as the higher temperature of the two sensors undershoots the setpoint value Loading though the heat generator is terminated EN2H 0221GE51 R0808 when the lower temperature of the two sensors has reached the setpoint plus the set buffer switching differential stratified loading Buffer loading pump extended running time When buffer loading of a buffer loading system is complete an extended running time for the buffer loading pump can be configured via a parameter setting 211 Hydraulic Components SDC DHC 7 3 6 3 NOTE Function Solid fuel boiler minimum temperature limit 212 Solid fuel function This function can only be called up if a configurable switching output was occupied with a solid fuel loading pump The following sensors can be used for control e SFS for the solid fuel boiler sensor The connection occurs automatically depending on the assignment of the output to VI1 or VI2 e SFS
14. If the automatic programs P1 P2 and P3 see System Parameter menu program parameter P1 to P3 were enabled the desired switching time program P1 P2 or P3 of the heating circuit affected by the reload can be selected If not enabled program selection is skipped Resetting then occurs by pressing and holding the input button approx 5 s until acknowledgement appears in the display Resetting is confirmed by acknowledging COPY OK The DEFAULT TIME function is then called up again to replace other circuits with their default programs if necessary EN2H 0221GE51 R0808 SDC DHC Operation A ATTENTION With the setting value ALL all heating circuits and the hot water circuit are overwritten with their default switching times with regard to the selected program When overwriting occurs individually created switching time programs are permanently lost and must be recreated from scratch Pressing the button causes an immediate return to the basic display EN2H 0221GE51 R0808 69 Operation SDC DHC Reloading default programs Switching time programs P2 and P3 disabled Fela Seet EN I al COTO CF aie KA Select KA heating circuit Reset HC Direct heating circuit MC 1 Mixed heating circuit 1 MC 2 Mixed heating circuit 2 DHW Hot water heating circuit 70 EN2H 0221GE51 R0808 SDC DHC Operation Reloading default programs Switching time programs P2 and P3 enabled
15. SDC DHC Operation Para Designation Setting range Setting values Factory Setting meter setting 11 Constant tem 10 95 C 20 perature setpoint only if output was set to constant regulator 12 Minimum 10 C to setting value of 20 temperature limit parameter 13 13 Maximum Setting value of parameter 12 to 75 temperature limit Setting value of parameter 30 in Heat generator menu OEM maximum limit 14 Temperature 5 20 K Mixed increase of heating heating circuit circuit 4 15 Follow up time of O 60 min 5 pump 16 Screed function OFF OFF 1 Functional heating 2 Screed drying heating 17 Return maximum 10 90 C 90 temperature limit 18 P part Xp 1 50 K 2 19 Sampling time Ts 1 600 s 20 20 part T 1 600s 270 21 Actuator runtime 10 600 s 120 22 Actuator end 1 Continuous control 1 position function signal in end position 2 Control signal suppressed at end position actuator de energised 23 Room control C 1 100 8 factor SDW 30 only EN2H 0221GE51 R0808 97 Operation SDC DHC Para Designation Setting range Setting values Factory Setting meter setting 24 Room control Tn 5 240 min 35 SDW 30 only 25 Holiday operating STBY Standby STBY mode RED Lowering operation 26 Room setpoint OFF 0 5 60 K h OFF ramp 28 Cooling OFF 18 to 24 OFF temperature of mixed heating circuit 39 Spread of hot 2 20K 5 water circuit pre
16. regulator 40 Offset valve 0 100 0 position of hot water circuit pre regulator 41 Switch on op OFF OFF timisation 1 Adaptation off 2 Adaptation on 3 Adaptation restart 42 Minimum pre heat 0 setting value of parameter 43 0 5 time 43 Maximum pre heat Setting value of parameter 42 to 5 time 30 h 44 Min jump back 0 30 C 5 temperature 45 Without room 0 10 C 1 sensor 46 Pre heat time at 0 30h 1 0 C 47 Lowering ramp 0 500 100 98 EN2H 0221GE51 R0808 SDC DHC Operation Para Designation Setting range Setting values Factory Setting meter setting Heat Heating circuit 00000 ZZZZZ ing name circuit name OEM 5 4 6 Heat generator menu HEAT GENER The parameters in this menu refer to the type of the respective heat generator and the associated specific control functions Para Designation Setting range Setting values Factory Setting meter setting 01 Design OFF Without heat generator 1 1 Oil gas one stage 2 Oil gas two stages 3 Oil gas 2 x one stage 4 Modulating burner 5 Open Therm 02 Start up protection OFF No start up protection 1 not if parameter 4 Unlimited start up 01 OFF protection 2 Start up protection controlled by weather conditions 3 Start up protection disconnected 03 Minimum tem 5 C to setting value of parameter 38 5 with perature limit not 04 automatic if parameter 01
17. wez2 wez Weza wez 2min 2min e Connection immediately with minimum delay e Reversion with configured delay P3 193 Hydraulic Components SDC DHC 194 7 3 5 2 NOTE Function Economy interval pulse Economy interval period duration Switching times Tank parallel operation combined operation hot water loading heating 10s 10s 1min 1min wezi wez vez weza wez 2min 2min 2min 2min e Connection up to the stage of parameter 09 with minimum delay for hot water loading e Incase of further need via heating further connection with configured delay of parameter 02 e Reversion with configured delay parameter 03 Circulation pump CIR This function is only available if a variable output is assigned to a circulation pump The output controls a hot water circulation pump The use of the economy interval minimises the usual circulation losses owing to adjustable switch on intervals during operation and determines the standstill time of the hot water circulation pump within an adjustable period economy interval This parameter determines the length of the period and hence the duration of the pause in a circulation pump pulse operating mode Economy interval pause Economy interval period duration Economy interval pulse The switching on degree is calculated from the ratio n Pulse time Period duration x 100 Example With an standstill time of 15 min
18. 1 MIX VALVE 2 menus These menus contain all parameters required to program the mixed heating circuit except the switching time programs Para Designation Setting range Setting values Factory Setting meter setting Heat Slope OFF 0 02 to 3 50 1 ing curve Re Reduced operation ECO Switch off operation ECO duced RED Lowering operation Heat Heating system UFH Floor heating RAD ing RAD Radiator system CONV Convector heater EN2H 0221GE51 R0808 95 Operation SDC DHC Para Designation Setting range Setting values Factory Setting meter setting 03 Room connection OFF Display of heat OFF in conjunction generator temperature with room sensor room sensor off operation active 1 Display of room temperature room sensor active operation active 2 Display of room temperature room sensor active operation disabled 3 Display of room temperature room sensor off operation active 04 Room factor OFF OFF 10 Influence active 500 RC Room controller active 07 Heating limit OFF 0 5 to 40 K OFF 08 Room frost 5 30 C 10 protection limit 09 Room thermostat OFF 0 5 to 5 K OFF function 10 Assignment of 0 Regulation to average 0 outside sensor value outside sensor 1 outside sensor 2 1 Regulation to outside sensor 1 2 Regulation to outside sensor 2 96 EN2H 0221GE51 R0808
19. 22 EN2H 0221GE51 R0808 SDC DHC Operation 5 1 1 Display basic display 1 Day of the week Date 4 Operating mode symbols 2 Time 5 Heat generator temperature 3 Active operating mode The illumination of the display is switched on by pressing any button or using the input button and switches off automatically if no buttons are pressed for a longer period of time During start up of the unit and after a power failure a segment test with automatic fault diagnosis is carried out The respective device type and the software version number then appear briefly The basic display that then appears shows the day of the week the date the time and the heat generator temperature in automatic mode Different values appear in the basic display depending on the set operating mode AUTOMATIC PARTY etc Thus for example in the ABSENT operating mode the indication ABSENT TIL appears instead of the date and the return date instead of the temperature Active summer deactivation is indicated by a beach umbrella symbol and active frost protection is indicated by a snowflake symbol EN2H 0221GE51 R0808 23 Operation SDC DHC 5 1 2 1 K 5 1 2 2 Factory setting Setting range 24 Operating elements Input button press turn By pressing once you can e Confirm input values By pressing and holding approx 3 s you can e Switch to the menu selection level
20. Heating Circuit 2 menu Pg 78 EN2H 0221GE51 R0808 SDC DHC Control Functions 6 8 2 NOTE Function See also 6 8 3 Function EN2H 0221GE51 R0808 Heating circuit outside temperature assignment Function active only when using a second outside sensor If in the central device a second outdoor sensor AF2 was connected to a variable input and registered the heating circuit can be assigned either to the outside sensor 1 2 or to the mean value of both sensors For each outside sensor the following applies In case of a defect affecting a sensor switching to the remaining outside sensor with simultaneous fault indication occurs automatically In case of a defect affecting both sensor circuits the heating circuit is regulated on the basis of a set heating characteristic curve and heating program corresponding to a fictitious outside temperature of 0 C with regard to the set minimum temperature 5 2 5 Direct Heating Circuit Mixed Heating Circuit 1 Mixed Heating Circuit 2 menu Pg 78 Outside temperature emergency operation value If a connected outside sensor fails during weather condition controlled operation sensor short circuit or interruption emergency operation takes effect Weather condition based control then adjusts the temperature based on an assumed fixed outside temperature specified via a parameter value Designation Key Menu Parameter Characteristic curve for SYSTEM 2
21. Mixed heating circuit 2 41 40 CU 4 Direct heating circuit 42 40 CU 4 Mixed heating circuit 1 43 40 CU 4 Mixed heating circuit 2 51 50 CU 5 Direct heating circuit 52 50 CU 5 Mixed heating circuit 1 53 50 CU 5 Mixed heating circuit 2 227 Hydraulic Components SDC DHC 228 7 3 11 3 2 Function Setting the bus address A ATTENTION Double assignments of bus addresses are not permissible and inevitably lead to errors in data transmission and thus to faulty control behaviour of the heating system Changing bus addresses A bus address can be changed at a later time using the following procedure e Disconnect wall devices from the data bus line disconnect plug connection at the bottom of the device e Reconnect the wall device holding the input button pressed down until the address setting screen is displayed e Set and confirm the new bus address Operation with wall device SDW 10 A wall device SDW 10 can be connected to the control device With an SDW 10 it is possible to detect the room temperature adjust the room setpoint temperature and change the control mode for a heating circuit remotely The settings only apply for the assigned heating circuit The bus address of the wall device is used to specify on which heating circuit the room sensor and the adjustment of the control mode are to act The connection is carried out via the data bus The address of the SDW 10 is set b
22. actuators with different runtimes e g 1 min 2 min 4 min react to the same deviation by readjusting by the same amount through adapting the action times The integral action time Tn remains unchanged here However care must be taken that the latter must always exceed the runtime of the respective actuator If necessary actuators must be used with other runtimes EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Example Coaction of P part l part adjustment time and sample time t qir r T T T T T T 05 10 15 20 25 30 35 40 45 50 55 60 65 gt y a OPEN position b Actuator behaviour with control deviation 50 adjustment time Tn 7 min c Actuator behaviour with control deviation 25 adjustment time Tn 7 min d Adjustment time Tn Xw 25 e Adjustment time Tn Xw 50 f Actuator pulse with control deviation Xw 50 EN2H 0221GE51 R0808 g Actuator pulse with control deviation Xw 25 h P part i part x Mixed heating circuit opening y Action time min 185 Hydraulic Components SDC DHC 186 7 3 4 10 1 5 Jump response to various control deviations open control circuit actuator removed Adjustment time T 7 min Sample time Tn 20 sec Mixed heating circuit runtime 2 min The P pulse that brings the mixed heating circuit to the new position and is proportional to the control deviation is followed by additional actuati
23. and a period of 20 min the circulation pump will run for 5 min before the subsequent pause of 15 min The following is used to calculate the switching on degree n 5 20 25 In this function a hot water circulation pump can be coupled to an existing automatic program of a control circuit with regard to the EN2H 0221GE51 R0808 SDC DHC Hydraulic Components NOTE Circulation pump with district heating 7 3 5 2 1 Function EN2H 0221GE51 R0808 switch on and switch off times The hot water circulation pump is in operation during the heating or hot water cycles of the selected circuit and program If operation of the time programs P2 and P3 were not enabled see System Parameters menu time program parameter and the circulation pump is assigned to one of these programs the pump will operate according to the stored default times The same applies if a switching time program was selected that does not exist for the controller type in use e g an MC2 for SDC 9 21 Hot water parameter 16 allows switching off of the circulation pump during hot water loading Electrical heating element ELH The function indirectly controls via circuit breaker an electrical insert in the water heater if the automatic summer switch off is active Switch off of the electrical heating element occurs via an additional hot water circuit thermostat to be created with the corresponding safety equipment 195 Hydraulic Compone
24. buffer setpoint control During solar loading demand for the buffer control at the heat generator is suppressed Heat generator cycle disable only with solar control mode priority mode The cycle disable serves to prevent frequent switching between solar loading and loading by the heat generator After a solar loading pump switch off the set time has to pass before the solar buffer tank can be loaded again by the heat generator boiler 197 Hydraulic Components SDC DHC Parallel switch over Heat balancing Reset heat balancing 198 Solar priority parallel switch over only with solar control mode priority mode Operation in hot water priority mode If the actual hot water temperature undershoots the hot water setpoint by the set amount solar priority mode is cancelled until the hot water setpoint has been reached Example Hot water setpoint is 50 C set value switch over 10 K There is no demand for the heat generator until the hot water temperature drops below 40 C Operation in buffer priority mode If the actual buffer temperature undershoots the buffer setpoint by the set amount solar priority mode is cancelled until the buffer setpoint has been reached Example Setpoints at buffer of heating circuits 45 C Buffer offset 10 K Switch over set value 20 K There is no demand for the heat generator until the buffer temperature drops below 35 C Heat balancing is activated through
25. implausibilities in the system has been implemented The jump occurs via an additional item in the relay test The test run is started by pressing the input button The sensor test sequence is similar to the final device test Value Range OT 50 C 40 C VF 10 C 90 C SF 5 C 90 C RT SDW 10 SDW 30 0 C 40 C SVLF 5 C 90 C SBUS 5 C 90 C VF1 evaluation as NTC 20 5 C 90 C not PT 1000 VF2 5 C 90 C VF3 5 C 90 C Confirmation is required for each sensor value All available inputs are checked Unoccupied inputs are marked with Meaning Display Value OK 80 C Value outside the sensible IRR range Short circuit Interruption Error Function programmed Error but no sensor at input No function programmed Error but a sensor is at input 241 Hydraulic Components SDC DHC Display 242 Bus test The system configuration is conveyed via the SMILE BUS Display occurs using an overview representation for a central device The following are displayed e Central devices in the system network e Wall devices that are directly assigned to the corresponding central device Bottom right Address of the operated central device Bottom left Display of the control network 1 ZG10 2 ZG20 3 ZG30 Top Display of the peripheral devices of operated central device
26. longer connection lines should be avoided to prevent the risk of interference Recommended layouts J Y St Y 2 x 0 6 8 2 Sensor resistance values 8 2 1 NTC 20 For outside sensor OT heat generator sensor BLRS BS tank sensor DHWS mixed heating circuit 1 flow sensor VF 1 mixed heating circuit 2 flow sensor VF 2 variable input 1 VI 1 setting not for exhaust gas sensor variable input 2 VI 2 variable input 3 VI 3 collector tank buffer sensor SBUS EN2H 0221GE51 R0808 251 Technical data SDC DHC 8 2 2 PT 1000 For variable input 1 VI 1 setting of exhaust gas sensor collector flow sensor SPFS 1000 00 2048 76 1039 02 2120 19 1077 93 2191 15 1093 46 2261 66 1116 72 2331 69 1155 39 2401 27 1193 95 2470 38 1232 39 2641 12 1270 72 2811 00 1289 84 8 3 Sensor measurement ranges Designation Brief description Sensor type Measurement range Outside sensor AF NTC 20 50 C to 90 C Heat generator sensor KF NTC 20 50 C to 120 C Flow sensor 1 VF1 NTC 20 50 C to 120 C Flow sensor 2 VF2 NTC 20 50 C to 120 C Tank sensor SF NTC 20 50 C to 120 C Collector flow sensor KVLF PT 1000 50 C to 210 C Collector tank buffer KSPF NTC 20 50 C to 120 C sensor Variable input VI 1 VE1 NTC 20 50 C to 120 C PT 1000 50 C to 500 C Variable input VI 2 VE2 NTC 20 50
27. operation OFF 04 Maximal Setting value of parameter 03 to 80 temperature limit not if parameter 01 OFF setting value of parameter 30 OEM maximum limit EN2H 0221GE51 R0808 99 Operation SDC DHC Para Designation Setting range Setting values Factory Setting meter setting 05 Limit mode 1 Minimum limit based on 1 minimum limit not request if parameter 01 9 Limited minimum limit OFF me vi ot Unlimited minimum limit 06 Sensor operating 1 Burner switch off in case 1 mode of defect 2 External burner switch off 3 Burner enable in case of defect 07 Minimum burner 0 20 min 2 runtime 08 Burner switching One stage 2 30 K 6 differential Two stages 2 setting value of parameter 09 0 5 K 09 Burner switching setting value of parameter08 8 differential II not if 0 5 to 30 K parameter 01 2 10 Connection delay 0 60 min 0 10 s 0 stage Il 11 Boiler start up 1 Unlimited enable during 2 relief stage Il start up relief 2 Time out during start up relief 12 Storage charge 1 Two stage hot water 1 1 2 stages circuit charge with delay of full load stage 2 Two stage hot water cir cuit charge unlimited 3 One stage hot water circuit charge partial stage only 100 EN2H 0221GE51 R0808 SDC DHC Operation Para Designation Setting range Setting values Factory Setting meter setting
28. status ba Mixed heating circuit 1 specified Heating program Holiday Absent Til Party Til Auto Summer Heating Red Heating Standby Switching time program P1 P2 P3 control mode Day RED ECO 40 EN2H 0221GE51 R0808 SDC DHC Operation Information Display Condition Remarks MC1 actuator Mix yALyE i Mixed heating circuit 1 Mixed heating circuit 1 operating status STF specified opens closes or does not move Mixed heating AuTo P 4 f4 Mixed heating circuit2 Heating program Holiday circuit 2 operating specified Absent Til Party Til Auto status Summer Heating Red Heating Standby Switching time program P1 P2 P3 control mode Day RED ECO MC2 actuator Mix VALVYE e Mixed heating circuit 2 Mixed heating circuit 2 operating status OPEN STOP ELOS specified opens closes or does not move District heating District heating valve With district heating valve operating aPen stapyeias Opens closes or does controllers status not move Heat generator HEAT GENER Heat generator specified Information on the switching operating status ON OFF state of the multi stage heat st 1 generator Heat generator e ENER Multi stage heat Information on the switching operating status _ snvarr generator specified state of the second stage of st 2 the heat generat
29. 1 Time Date Menu oace stn o tee estate ated ta cedaeucedneatatecedseucedeceensclos 54 5 2 2 Timeprograms MENU 233525 soso eo co saa ete nia cadedee weer eee 55 5 2 2 1 Selection of the control circuit c eceeeeeeeeeeeeeeeteeeeeeees 56 5 2 2 2 Selection of the program aint dee deietn aw lenedeweete isl cst 56 5 2 2 3 Selection of day of the week and cycle c cceeeeseeeeeees 56 5 2 2 4 Programming switching times and cycle temperatures 57 5 2 3 System Parameters MeNU cece eee eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 72 5 2 3 1 Language selection a arse car rs ar a a aha aah ars arb als ad cue 72 5 2 3 2 Time PlOQraM cee dee ter ates ter utes eerutns deretes deeretesatemtestumtusabersee 73 5 2 3 3 Operating MOUGt scsi ene eee 74 5 2 3 4 Parameter reSe t ccc ccescceeecesc ccs ee 76 523 9 COMPICEMESEl ai lant dndlnilactuielontoml cn a a tel cine a 77 S24 DAVA MENU e e aa a a re aa r Aae antag e E AEE SRE ER ets 77 5 2 4 1 Night time hot water temperature sssssseeseeeeeseeeeeeeeeeeeeeeene 78 5 2 4 2 Legionella protection day cccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 78 5 2 5 Direct Heating Circuit Mixed Heating Circuit 1 Mixed Heating Circuit 2 Menu 78 5 2 5 1 Reduced ODEFALION sx csccgues sce dass cceceseneuareasssnetabeuduataseraesteberesens 79 5 2 5 2 Heating SYSIOIN eeaeee eee ie aee ie 80 5 3 Error MESSAGES oieri cen sccedcentecetcondecet conb
30. 1 MC 2 DHW l Deut te Copy time circuit Select program O eee S B r2 o oP o Select copy function HC Direct heating circuit MC 1 Mixed heating circuit 1 MC 2 Mixed heating circuit 2 DHW _ Hot water heating circuit 1 Program selection for source and target circuits are skipped if programs P2 and P3 are disabled in the System Parameter menu EN2H 0221GE51 R0808 65 Operation geal Copy day Select ake EX Copy source day from Mo Mo Su Example Monday Source day sees base ED Copy Mo irst target day to Tu 1 target day or Example Tuesday aes 1 7 Mo Su or 1 5 Mo Fr or Copy source day 6 7 Sa Su to first target day Acknowledge Copy day Tuesday as with Monday Source day Select second target day KA R Ha Example Wednesday Second target day Copy source day to second target day Acknowledge Co eae Ea Wednesday as with Monday Select and copy other target days if necessary Return to the basic display 66 EN2H 0221GE51 R0808 SDC DHC Operation Copying heating circuits NOTE Heating circuits cannot be copied to hot water circuits since they have different cycle temperatures If a heating circuit is selected as the source circuit the hot water circuit can no longer be called up as the target circuit The hot water circuit as the source circuit is also the target circuit In this
31. 2 Last error message but one Display 03 Error message 3 Last error message but two Display 04 Error message 4 Last error message but three Display 20 Error message 20 First error message Display 21 Reset error SET by pressing the input button messages OEM 5 4 18 Sensor calibration menu SENSOR ADJ In this menu all sensors connected to the central device can be corrected by 5 K based on the factory calibration value Para Designation Setting range Setting values Factory Setting meter setting 01 Outside sensor 5 5 K 0 02 Heat generator 5 5 K 0 sensor 03 Hot water sensor 5 5K 04 Flow sensor of 5 5 K mixed heating circuit 1 05 Flow sensor of 5 5 K 0 mixed heating circuit 2 EN2H 0221 GE51 R0808 113 10 of mixed heating circuit 2 Control Functions SDC DHC Para Designation Setting range Setting values Factory Setting meter setting 06 Collector flow 5 t5K 0 sensor 07 Buffer sensor of 5 5K 0 collector 08 Sensor of variable 5 5 K 0 input 1 09 Sensor of variable 5 5 K 0 input 2 10 Sensor of variable 5 5 K 0 input 3 11 Room sensor SDW 5 5 K 0 10 of direct heating circuit 12 Room sensor SDW 5 5 K 0 10 of mixed heating circuit 1 13 Room sensor SDW 5 5 K 0 114 6 Control Functions 6 1 Variable adjustment of the hydraulic parameters variable
32. 3 Outside temperature emergency operation valUe eee 121 6 8 4 Outside temperature disable cccccccccceceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 122 0 8 9 Climate ZoNe neenon h ease ase cous ea chad carina eae 122 6 8 6 Design temperature 2 0 2 cccceeeececececeeeeeeeceeecceeeeeeneeeeenenceenenes 122 6 8 7 Summer SVVIC CO sentation Pam 123 EN2H 0221GE51 R0808 5 Contents SDC DHC 6 8 8 System frost Protection ccccccsceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeseaaeeeeeeeeeees 124 6 8 9 Pump forced Operation wiisiicscccccccacicccasisccecectecgenesdasdeanctacdaccncbadedeasdecass 127 7 Hydraulic Components ssssssssssssnsnsnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nna 128 7 1 Heatgenerator BOET siie ieee iaaea riechen hbcexed debcexes 128 7 1 1 Heat generator start up protection cccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 128 7 1 2 Heat generator minimum temperature limit eect 129 7 1 3 Maximum temperature limit heat generator eee 130 7 1 4 Heating circuits minimum temperature limit 000000aeeeeeeee eee 130 7 1 5 Heat generator sensor control mode s ssssssrrrrrrrrrrrrrrrrrrrrrrrrrrrnn 130 7 1 6 Minimum burner runtime amp cc2e ene cesecese conc cece tesccesereuecAlecedecesecesecesecestcescces 131 7 1 7 Switching Multi stage heat generator Switching differential 131 7 1 8 Operation for modulating
33. C to 120 C Variable input VI 3 VE3 NTC 20 50 C to 120 C Depending on the selection of the assigned function PT 1000 e g for exhaust gas sensor connection 252 EN2H 0221GE51 R0808 SDC DHC Technical data 8 4 Digital inputs Designation Brief description Input type Measurement range Impulse metering unit Imp Extra low voltage lt 10 Hz Burner stage 1 operating BZ1 230 V OFF ON hour counter Burner stage 2 operating BZ2 230 V OFF ON hour counter EN2H 0221GE51 R0808 253 Log SDC DHC 9 Log Weekly switching program Object Set by Mon 1 Cont circuit Time Setpoint Opt Tue 2 Cont circuit Time Setpoint Opt Wed 3 Cont circuit Time Setpoint Opt Thu 4 Fri 5 Cont circuit Time Setpoint Opt Cont circuit Time Setpoint Opt Sat 6 Cont circuit Time Setpoint Opt Sun 7 254 Cont circuit Time Setpoint Opt EN2H 0221GE51 R0808 SDC DHC Index Index B Boiler circuit pump 158 Boiler circuit pump extended running time 159 Boiler circuit pump pre running time 159 Boiler sensor 2 141 Boiler temperature offset 191 Buffer Discharge protection 211 Forced dissipation 209 Minimum temperature li
34. DHC 7 1 8 Switching differential 136 Operation for modulating burners Modulating burners are controlled in a way similar to mixed heating circuit control through a PI control algorithm since in this case an actuator integrated in the burner regulates the air fuel ratio according to the heating power However in contrast to the control of conventional burners operation of modulating burners is subject to the following criteria In contrast to conventional ON OFF burner control systems with their switching differentials symmetrical around the respective setpoint temperature the switching differential for modulating burners is an asymmetric interval with the switch on level always 1 K below the setpoint temperature This offers the advantage that in case of another possible overshoot through the P part the burner is not switched off because the switch off point lies above the setpoint by a wider margin than the switch on point is below the setpoint overshoot reserve Also when the heat demand is low especially in the low load area the temperature will drop only slightly since the burner is switched on again as soon as there is a deviation of more than 1 K Example Set nominal temperature 50 K Switching differential 6 K Switch on at 50 C 1 K 49 C Switch off at 49 C 6 K 55 C a __ Switch off level x Deviation K b Switch on level y Setpoint value EN2H 0221GE51 R0808 SDC DHC
35. Mean outside temperature d Set value 123 Control Functions SDC DHC 124 NOTE See also 6 8 8 Function Cancelling switch off The switch off is cancelled when the current outside temperature drops below the set value by more than 1 K The summer switch off function is cancelled e incase of an outside sensor defect e incase frost protection is active The HEATING LIMIT parameter can be used to assist the summer switch off function This function allows setting non heating periods on warm days for each individual heating circuit In connection with a second outside sensor the current averaged outside temperature is accepted for summer deactivation if the average value of both sensors is specified during outside sensor assignment Active summer deactivation is represented by a beach umbrella symbol in the basic display In case of separate operation of the heating circuits System Parameters menu Control Mode parameter the symbol is not displayed If two outside sensors are connected and they were assigned to different heating circuits the symbol is furthermore only displayed if both sensors fulfil the condition for summer de activation 5 2 3 System Parameters menu Pg 72 System frost protection To avoid the freezing of the heating system in switch off mode the controller is equipped with electronic frost protection Operation without room temperature sensing If the outside temperature curre
36. Outside temperature Switching differential System data bus SD Il Switching differential II Burner stage 1 operating hour TS Tank sensor ue ro S p Burner stage 2 operating hour TLP Tank loading pump ut a SLS Direct heating circuit SLS Solar loading switch over Direct heating circuit pump SLSS Solar loading switch over sensor Bsz RP sor Switch of operation SFD__ Solar forced dissipation CTBS Collector tank buffer sensor Ra Flow sensor of mixed heating circuit 1 Collector flow sensor Flow sensor of mixed heating circuit 2 Mixed heating circuit HG Heat generator MHP Mixed heating circuit pump HGS Heat generator sensor Switching time program Wall device for room temperature sensing Switching time program Circulation pump Buffer sensor top Charging pump EN2H 0221GE51 R0808 21 Operation SDC DHC 5 Operation 5 1 Display and operating elements 2 OsNOPXC amp 2 5 11 10 1 Manual mode Emission measurement button not on district heating controllers Operating modes button basic display Switching time programs Holiday programs button System information button Display Cover clip for service socket Daytime room temperature button Night time room temperature button oO ON DO a FF W DN Daytime hot water temperature button 10 Input button press turn 11 Operating mode symbols heating programs
37. RETURN CONTR The parameters in this menu refer to special settings with regard to the increase in return temperature with heat generators Enabling occurs only with corresponding activation in the Hydraulics menu Para Designation Setting range Setting values Factory Setting meter setting 01 Return temperature 10 95 C 20 setpoint 02 Switch off 1 20K 2 differential 03 Follow up time of 0 60 min 1 pump EN2H 0221GE51 R0808 105 Operation SDC DHC 5 4 9 Solar menu SOLAR The parameters in this menu refer to special settings with regard to the solar applications Enabling occurs only with corresponding activation in the Hydraulics menu Para Designation Setting range Setting values Factory Setting meter setting 01 Switch on Setting value of parameter 10 differential 02 3 K to 30K 02 Switch off 2 K to setting value of parameter 5 differential 01 3K 03 Minimum runtime 0 60 min 3 of solar charging pump 04 Collector maxi OFF 70 to 210 C 210 mum temperature 05 Buffer maximum 20 110 C 75 temperature limit 06 Operating mode 1 Priority operation Parallel operation Priority operation of hot water circuit 4 Priority operation of buffer 07 Heat generator OFF 0 5 to 24 h OFF cycle inhibitor only if parameter 06 1 08 Solar priority OFF 1 to 30K OFF parallel switchover 09 Heat balance OFF No heat balancing OFF 1 Heat balancing vi
38. The current measured value plus or minus the correction made and the correction itself appears in the display The increment of the compensation is 0 5 K A ATTENTION The sensor circuits are calibrated at the factory using precise measuring equipment Compensation should only be carried out if you are sure that the amount of the deviation remains constant over the entire measurement range With sensor compensation the respective amount must be noted down as otherwise the factory setting is no longer valid and the reference value is lost The original factory setting cannot be restored via a reset e Compensation in the case of very longer sensor cables e Constant external temperature influence on sensors Full controller reset To revert the controller to its state of delivery a full reset can be performed Here all parameters values and counters accessible via the enabled code are reset and the controller is restarted Values that are not accessible via the set access code remain in tact Press the L and keys simultaneously Controller time correction In some special cases it may be necessary to adjust the runtime of the clock integrated in the controller Please contact the manufacturer if necessary 249 Technical data SDC DHC 8 1 Technical data General Mains connection voltage 230 V 6 10 Rated frequency 50 60 Hz Power consumption
39. VA1 VA2 Charging pump DKP VA1 VA2 Boiler circuit pump 1 DKP VA1 VA2 Boiler circuit pump 2 DKP VA1 VA2 Global malfunction DKP VA1 message VA2 Timer DKP Solar loading pump DKP VA1 KVLF KRLF Return flow sensor option SDC 8 21 SDC 9 21 VA2 KSPF _ 14 SDC 12 31 DHC 43 2 116 EN2H 0221GE51 R0808 SDC DHC Control Functions Function Adjustable Inputs Comment at output Fixed Optional assign VI 1 2 ment Buffer loading pump VA1 VA2 PF PF1 19 Fixed assignment to VI if PLP is SDC 8 21 SDC 9 21 set to PF Otherwise PF1 can SDC 12 31 be adjusted at free VI activation DHC 43 2 of buffer management Solid fuel loading VA1 VA2 FKF FPF 18 SFS in fixed assignment to pump corresponding VI standard buffer sensor is KSPF separate solid fuel buffer tank sensor SFB can be configured optional Stratified tank loading VA1 VA2 SSLP pump DHC 43 2 Solar loading valve VA1 VA2 SLVF SLVS in DHW storage KSPF in buffer Solar forced VA1 VA2 dissipation valve 6 2 Switching time program enabling See also EN2H 0221GE51 R0808 The modular Smile SDC DHC 43 series of controllers features three switching time programs for each heating circuit that can be set separately When supplied only one switching time program is enabled The use of only a single switching time program for
40. Variable output 1 function operating state Variable output 2 function operating state button Turn input button to the right Average current outside temperature value Outside temperature min to max 0 00 to 24 00 hours Heat generator temperature setpoint actual value Hot water temperature setpoint actual value Flow temperature setpoint actual value Flow temp of mixed heating circuit 1 setpoint actual value Flow temp of mixed heating circuit 2 setpoint actual value Variable input 1 setpoint actual value Variable input 2 setpoint actual value Variable input 2 setpoint actual value Operating hours Activations of heat generator 36 EN2H 0221GE51 R0808 SDC DHC Operation Setting time for automatic return If the Ci a lt a ma 2S pal L F AANO ACO Setting range Factory setting OFF 1 10 min OFF button is pressed and held for approx 3 s the INFO TIME parameter appears With this parameter the time it takes for automatic return to the basic display can be specified No return The last selected information display continuously remains in the basic display until the next change Automatic return from the information level after the specified time in 0 5 minute increments 5 1 2 7 1 Temperature displays Information Display Condition Remarks Outside Determined temperature 1 value Current
41. a parameter setting The user can select between flow calculation via the pump runtime and determination of the flow volume via the pulse signal input of the device if such an input is available Any commercial flow meter can be connected to the pulse input only if heat balancing is activated With this function the heat balancing counter can be reset when heat balancing is activated EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Volume flow NOTE Density of medium Heat capacity NOTE Anti blocking function 7 3 6 2 NOTE EN2H 0221GE51 R0808 only if heat balancing is activated This set value allows choosing between volume flow computed in e litres minute for calculating the flow volume or e litres pulse when using the pulse input corresponding to the respective pumping capacity of the solar loading pump With set value 0 L min no calculation of heat balancing is possible only if heat balancing is activated This set value defines the fluid density of the heat carrier medium used according to the manufacturer data Specific heat capacity medium only if heat balancing is activated This set value defines the specific heat capacity of the heat carrier medium used according to the manufacturer data The physical values of volume flow density and specific heat capacity form the basis for determining the solar heat balancing and the solar power and are calculated according to the m
42. above 60 C this function should not be activated to avoid safety switch off in particular for heat generators with a low water capacity Tank discharge protection must be set accordingly for hot water loading from buffer tanks This function determines the default setting of the tank loading temperature compared to the set hot water circuit setpoint In case of setpoint modifications the heating energy needed for the hot water supply is adjusted In case of several devices in the bus system and several hot water circuits the tank loading temperature depends on the highest setpoint if several tanks are loaded simultaneously This function determines the size of the hot water circuit switching differential The switching differential affects the relevant hot water setpoint symmetrically The current hot water temperature is lower than the hot water setpoint by half the amount of the hot water switching differential The current hot water temperature overshoots the hot water circuit setpoint by half the amount of the hot water switching differential After switching off the heat generator the tank loading pump is stopped only after a time delay to prevent a safety switch off in case of high temperatures The set value can be adjusted to the holding capacity of the hot water tank used 191 Hydraulic Components SDC DHC 192 NOTE Tank sensor 2 See also Function Excessively long extended running times unneces
43. active frost protection 5 2 3 System Parameters menu Pg 72 Cycle operation The frost protection function is activated as soon as the temperature drops below the set frost protection limit System Parameters menu parameter 05 The frost protection function becomes effective when frost protection is active and there is no demand by the heating circuit 125 Control Functions SDC DHC 126 With the frost protection setting cycle operation there is no continuous demand for the heat generator in contrast to continuous operation With system frost protection active the heating circuit pumps are switched on and the mixed heating circuit valves are closed As long as the measured flow temperature of the mixed heating circuits or the heat generator temperature in the direct heating circuit respectively does not drop below the current setpoint room temperature RTFrost or RT Night no demand value is forwarded to the heat generator When the flow temperature drops below the current setpoint room temperature heating is activated Once the setpoint flow temperature has reached the setpoint room temperature and the set time System Parameters menu parameter 19 has passed the demand value to the heat generator is retracted and the mixed heating circuit valve closes while the pumps continue running If no data are detected from the outside sensor e g because the sensor is defective only the pumps are swit
44. be applied if several condensing boilers are switched by a single central device The leading cascade stage can still be set manually to any existing stage even when automatic stage sequence switching is disabled Changing the heat generator type within the central device at address 10 leads to an automatic reset of the leading stage to the first heat generator 233 Hydraulic Components SDC DHC 7 3 12 3 7 3 12 3 1 7 3 12 3 2 234 Mode of operation of cascade control Switch on characteristics The switch on characteristics of the boiler stages are determined by the set switching differential and the dynamic switch on delay The stage number is incremented only when the following criteria are fulfilled BTactuat lt BT setpoint SD 2 t gt tswitch on delay 100 dVT 100 VLSetpoint 100 StageSnumber StageSselection The boiler temperature of the leading boiler or the total flow sensor must have exceeded the specified boiler setpoint minus half of the switching differential switch on delay time for at least the calculated switch on delay Additionally the requested stage number must have been sent to central device 10 as the active status response Switch off characteristics The stage number is decreased again as soon as the temperature of the leading boiler or of the total flow sensor exceeds the present setpoint boiler temperature plus half of the switching differential for at least the
45. burners c ccccccceceseeeceeece cece teense cee eee 136 7 1 9 Modulation of P part Xp ioc uese eee eee ewe eee ene eene we 137 7 1 10 Modulation of sample time Ta ccccceccccceeeeeeeeeeeeeeeeeeeeeesseeeeeeees 137 7 1 11 Modulation of integral action time TN ee eeeeeeeeeeeeeeeeeeeeeeeeeeee 138 7 1 12 Modulation of PUMICE satdenteinddunt detest tees ecetdntlcntdctdcetdatcuetdetcues dente 138 7 1 13 Modulation of Start time s nuccncncnenenencsenenenesesenemene 138 7 1 14 Modulation of start power vs vesecess peck canes esac iace cs comeptues aren vonescdecinepese eens 139 PSV MO DETER sner a e E E cues E E E E 140 PANG Use of Dollar Sensor 2 iistersieeeieiiienetetuoenkte inneni eunen ie enient euenien 141 7 1 17 External heat generator cut off 00 0 0 eects 141 7 1 18 Heat generator forced discharge ccc eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 141 7 1 19 Exhaust gas temperature Monitoring 0 eeeeeeeeeeeeeeeeeeeeeeeeeeee 142 1220 BUNNEr counter MOKG stictcentc cut cendccndden Se cntcertccutdertccutduntccutdenbevutdenSduutdence 143 7 2 Heat generation heat exchanger district heating cccceeeeeeeeeeeeeeeeeeeeeeees 144 7 2 1 On Off operation of the district heating valve 145 7 2 2 Continuous heat exchanger valve ContrOl eeeeeeeeeeeeeeeeeeeeeeeeeeee 145 7 2 3 District heating return temperature limit eee eeeeeeeeeeeeeeeeeeeee 147 7 2 4 Retu
46. can be specified individually for each heating circuit 1 2 1 The selected setting applies for all heating circuits together 2 Each heating circuit can be assigned an individualised set ting Individualised daytime room temperature for each heating circuit gt Press button gt Select desired heating circuit HC MC 1 or MC 2 by turning the input button gt Confirm selected circuit by pressing the input button gt Set flashing room temperature specification to the desired value by turning the input button gt Confirm set value by pressing the button Alternative Automatic acceptance of the value after the set information time see 5 1 2 7 System information button pg 35 5 30 C 20 C EN2H 0221GE51 R0808 SDC DHC Operation 5 2 3 3 2 Setting range Factory setting 5 2 3 3 3 PYYVVY TTT N TTY T YS EN2H 0221GE51 R0808 Individualised night time room temperature for each heating circuit gt Press button gt Select desired heating circuit HC MC 1 or MC 2 by turning the input button gt Confirm selected circuit by pressing the input button gt Set flashing room temperature specification to the desired value by turning the input button gt Confirm set value by pressing the button Alternative Automatic acceptance of the value after the set information time see 5 1 2 7 System
47. connections may not be made The earth connection must be made on one side of the star OOOO Ce ny b lt maaa eee ne d a Shielding b Two lead data bus line c Distributor terminal d Branch box The outside sensor may not be installed near transmitters or receivers e g on garage walls near garage door opener receivers amateur radio antennas radio alarm systems or directly next to large transmission equipment etc Overview SDC DHC 3 Overview The modular SDC DHC control device is available in an installable switch cabinet version and a surface mounted wall version with the following equipment features Number of output relays District heating valve Mixed heating circuit 1 Mixed heating circuit 2 CLOSED gt 5 D Oo m Burner stage 2 Variable output 3 Tank loading pump Variable output 2 Variable output 1 T SDC 9 21 5 o n Lt hee a ai we variable relays 10 two 3 SDC 12 31 variable relays 1 DHC 43 1 2 DHC 43 2 DHC 43 3 20 EN2H 0221GE51 R0808 SDC DHC Abbreviations RED OS OS2 FGS OT BUS OC1 OC2 DC DCP ECO EHR SFB SFR FC SFP PI BP CC CRS CFS MM MC P1 P2 P3 BS 4 Abbreviations The following abbreviations are used in this documentation in the display of the control device Buffer sensor 2 bottom Lowering operation
48. correction of the heating curve heating curve adaptation is made at the service level this parameter can no longer be manually set Instead of the slope display the message HEATING CURVE starts to flash during the adjustment and is corrected continuously Recommended settings Floor heating 0 3 1 0 Radiator heating 1 2 2 0 Convector heating 1 5 2 0 The heating curves are limited by the minimum and maximum temperature limits in their valid range The relevant flow temperature is controlled within the limit range exclusively according to the specified limit values With the central device the jump always occurs with the direct heating circuit HC In case of wall devices the assigned heating circuit will be the first If other heating circuits exist their slope values can be selected with the relevant access authorisation and modified if necessary 5 1 2 10 Heating curve pg 47 163 Hydraulic Components SDC DHC 164 7 3 1 3 7 3 1 4 7 3 1 5 NOTE Function Application See also Reduced operation See 5 2 5 1 Reduced operation Pg 79 Heating system See 5 2 5 2 Heating system Pg 80 Heating circuit temperature limit This function is not active if the heating circuit control is used as constant control CC This function limits the flow temperature of a heating circuit The minimum and maximum temperatures set in the relevant parameters of a heating circuit do not exceed or f
49. danger of system freezing Fault message Five fault messages from automatic stokers condensing log expansion versions with OpenTherm These fault messages come from automatic stokers and are categorised as either locks blockages or warnings The display and further processing of logical fault messages from the SMILE system can be enabled or suppressed via a corresponding configuration see System Parameters menu parameter 13 logical fault message The display and further processing of fault messages from a connected automatic stoker can be controlled as follows Using parameter 27 in the System Parameters menu you can specify which of the fault messages transmitted by an automatic stoker is forwarded to the SMILE system Using parameter 28 in the System Parameters menu you can specify whether or not fault messages of an automatic stoker are to be written to a separate fault memory If the parameter is set to ON another menu appears in the menu with the designation Fault 2 Only faults of the automatic stokers are saved in this fault memory 246 EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Additional fault processing Faults appear in the basic display of the controller System faults appear on the information level with the corresponding information value Faults may be copied to the fault message log see below for description If configured accordingly faults activate a fault message output to the c
50. depends on the wiring at the respective variable input in the following way Connection terminal of variable input 1 2 3 open Control based on the current control mode AUTO RED HEATING HEATING STANDBY Connection terminal of variable input 1 2 3 short circuited Control functions in standby mode heating and hot water are switched off frost protected Connection terminal of variable input 1 2 3 with terminating resistor with 10 kOhm Control based on continuous heating Connection terminal of variable input 1 2 3 with terminating resistor with 2 2 kOhm Control based on continuously reduced operation according to specification as reduced or switch off mode Only one modem can be connected to each control device EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 10 5 Function 7 3 10 6 NOTE Function EN2H 0221GE51 R0808 In case of simultaneous access to a heating circuit the following rules apply e If multiple variable inputs are configured to the same heating circuit the priority is as follows variable input 1 variable input 2 variable input 3 e Ifa variable input is assigned to ALL it has a higher priority than a heating circuit assignment e If multiple variable inputs are configured to ALL the priority is again as follows variable input 1 variable input 2 variable input 3 ATTENTION Short circuit or terminating resistor may be connected to GND ground only
51. e Time e Year e Day Month e Time change mode summer winter time All listed daytime values are set at the factory and generally do not need to be updated An internal pre programmed calendar ensures automatic time change on the annually recurring summer winter time switchover dates If necessary the automatic time change can be deactivated The current weekday Mo to Su is determined from the calendar date and does not need to be set Corrections for rare fault cases See 5 2 Menu selection level pg 48 gt Turn input button and select the Time Date menu gt Turn input button and select the desired calendar value time year day month change gt Press input button and change the corresponding value by turning the input button gt Press input button to confirm the set value gt Turn input button values to select and change additional calendar Returning to the basic display takes place by pressing the button or automatically after the set information time see 5 1 2 7 System information button pg 35 EN2H 0221GE51 R0808 SDC DHC Operation NOTE Access Returning EN2H 0221GE51 R0808 Timeprograms menu Individualised switching time programs for heating and hot water operation can be created in this menu Here the factory set default programs P1 and if enabled P2 and P3 as well of each heating circuit and the hot water circ
52. first priority tank remains below the set switch over temperature and if the loading conditions for the second priority tank temperature sensing by the collector tank buffer sensor usually buffer tank for heating support are fulfilled the solar loading pump SOP is temporarily switched off after the time set in the Solar menu parameter 15 During the switch off time the differential between the collector flow sensor SPFS and the sensor for solar loading switch over SLVF is determined If the switch on condition is fulfilled the first priority tank is loaded If the loading condition is not fulfilled after the set time loading is continued into the lower priority tank as long as the loading conditions are not fulfilled These cyclical checks are suspended if the temperature at the solar loading switch over sensor plus the switch on differential becomes greater or equal the set final switch off temperature Solar loading switch over operation Only a setting option if a solar loading pump is set on the hydraulic level 214 EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 8 Hydraulic buffer relief HBR Function Application EN2H 0221GE51 R0808 1 Buffer tank Using a 3 way switching valve output active hydraulic buffer relief HBR causes temporary intake into the upper region of the buffer tank if that region has not reached its setpoint temperature yet so that connected heating or hot
53. for a variable output VO1 or VO2 The function becomes active on detection of fault messages of any kind It serves as a global fault message output for connecting optical or acoustic alarm signal devices Timer Only active if setting 14 timer was selected for parameter 05 direct heating circuit pump output in the Hydraulics menu This function controls a consumer according to the current switching time program of the direct heating circuit 217 Hydraulic Components SDC DHC 218 7 3 10 4 Function Assignment NOTE External switching modem Only activated if setting 11 external switching modem was selected for parameter 08 09 or 10 variable inputs in the Hydraulics menu This configuration allows switching between control modes via the telephone using a switching modem to be provided by the user for holiday homes etc A switching modem can be assigned to each of the three variable inputs VI1 VI3 If a variable input is assigned this function the associated parameter appears in the System menu for assignment of the switching modem to the respective heating circuit The same parameters and areas are involved here as with the demand contact i e the modem acts either on the direct circuit DC mixed heating circuit 1 MC1 mixed heating circuit 2 MC2 hot water circuit HW or the entire system ALL i e globally on all central devices on the data bus system The control mode
54. gt Press input button to access the selected circuit Selection of the program If the switching time programs P2 and P3 have been enabled see System Parameter menu program parameter P1 to P3 the program selection appears If switching time programs P2 and P3 are disabled program selection is automatically skipped see System Parameters menu program parameter P1 Selection of day of the week and cycle Once the program is selected the first cycle of the first day of the week MO 1 and the relevant section in the top time bar flash The other cycles are selected by turning the input button and confirmed by pressing the input button EN2H 0221GE51 R0808 SDC DHC Operation 5 2 2 4 5 2 2 4 1 NOTE 5 2 2 4 2 EN2H 0221GE51 R0808 Programming switching times and cycle temperatures Switch on time The switch on time is the start of heating or with enabled switch on optimisation the start of assignment After selecting the day of the week and the corresponding cycle the respective switch on time appears flashing and can be set with the input button lt 2 The time bar in the top part of the display provides an overview of all programmed cycles between 0 00 and 24 00 hours on the selected day of the week The switch on time cannot be set below the switch off time of a previous cycle or below 0 00 hours of the selected day of the week If the switch on time is changed the corresp
55. hot water thermostat see 05 parameter transducer for hot water circuit is used to detect the hot water temperature these parameters are skipped Direct Heating Circuit Mixed Heating Circuit 1 Mixed Heating Circuit 2 menu These menus contain all parameters required to program the heating circuit except the switch time programs Max one direct heating circuit and two mixed heating circuits mixed heating circuit 1 and mixed heating circuit 2 are available as heating circuits The following described heating circuit parameters are available separately for setting for each heating circuit EN2H 0221GE51 R0808 SDC DHC Operation 5 2 5 1 Factory setting Setting range Set values Application Application NOTE EN2H 0221GE51 R0808 Reduced operation During reduced operation you can select between two operating modes ECO ECO RED RED lowering operation The heating circuit pump of the direct heating circuit continues functioning during reduced operation see 5 2 3 2 Time program pg 73 The flow temperature is determined based on the lowered room temperature from the associated reduced heating curve The set maximum temperature is not undershot Building with minimal insulation values and high cooling loss ECO switch off operation During reduced operation the direct heating circuit is switched off completely with outside temperatures above the set frost protection limit The
56. information button pg 35 5 30 C 16 C Individualised operating mode for each heating circuit Each heating circuit can be assigned an individualised operating mode gt Press button gt Select desired heating circuit HC MC 1 or MC 2 by turning the input button gt Confirm selected circuit by pressing the input button gt Select flashing operating mode by turning the input button gt Confirm set operating mode by pressing the button or the input button gt With short term operating modes ABSENT PARTY set desired target value by turning the input button and confirm set value by pressing the input button Alternative Automatic acceptance of the value after the set information time see 5 1 2 7 System information button pg 35 This parameter specifies the end of heating operation depending on the outside temperature based on the following criteria 75 Operation SDC DHC 76 NOTE Factory setting Setting range 5 2 3 4 Quick increase in outside temperature If the averaged outside temperature is below the set value and the current outside temperature is 2 K above the set value heating operation is interrupted Slow increase in outside temperature Deactivation is also initiated when the averaged and current outside temperature exceeds the set value Undoing deactivation Deactivation is undone when the averaged and current outside temperatur
57. is not active ON ON Action of heating generator start up protection on heating circuits HDCP MC1 MC2 Action of heat generator start up protection on hot water circuit tank loading pump Action of heat generator start up protection on buffer loading pump No No No Yes Yes Yes Yes Yes No Yes Yes No No No Yes Yes Yes No 206 EN2H 0221GE51 R0808 SDC DHC Hydraulic Components NOTE EN2H 0221GE51 R0808 Loading control The supply of energy from a controlled heat generator to the heating circuits is realised through loading the buffer The buffer control ensures that the buffer is supplied with sufficient energy from the heat generator via the buffer loading pump With buffer discharge controls it must be ensured that the residual energy from the buffer can be transported to the heating circuits if a controlled heat generator is not available With control mode 3 and 4 the buffer loading pump output must be switched for this purpose in this case With control mode 6 only the burner demand is suppressed with a heat generator disable If a heat generator is not available and the actual buffer temperature is below the minimum buffer temperature while buffer start up protection is active the buffer loading pump output remains switched off priority A heat generator is not available if e An external heat generator disable is activ
58. max 5 8 VA Pre fuse max 6 3 A slow blowing Contact load of the 2 2 A output relays Bus interface For the connection of external devices wall device PC modem or gateway Max bus length 50 m Power supply via bus 12 V 150 mA Ambient temperature 0 50 C Storage temperature 25 60 C Degree of protection IP 30 Protection class as per EN 60730 Protection class as per EN 60529 Radio protection EN 55014 1993 Interference resistance EN 55104 1995 EC conformity 89 336 EEC Housing dimensions 144 x 96 x 75 mm W x H x D Housing material ABS with static inhibitor Connection technology Plug in screw terminal connections 250 EN2H 0221GE51 R0808 SDC DHC Technical data 8 1 1 Installation recommendations Mains voltage lines mains connection burners pumps servo motors Diameter 1 5 mm Max permissible length No limit for installation in buildings Safety low voltage lines sensors ext switches upon demand via switching contact modem connection lines analog signal lines etc Diameter 0 5 mm Max permissible length 100 m looped circuit longer connection lines should be avoided to prevent the risk of interference Data bus lines Diameter 0 6 mm Max permissible length 50 m looped circuit longest distance between a central device and a device to be supplied
59. maximum heat generator temperature is not functional The heating circuit pump is switched off after a delay to avoid safety deactivation by reheating the heat generator pump follow up If the outside temperature is or becomes lower than the specified outside temperature frost protection limit the controller switches from deactivated deactivation mode to lowered lowering operation and controls the heating circuit temperature based on the set lowering curve taking the set minimum heat generator specification into account Building with high insulation values full heating protection The mode set here also applies for the ABSENT and RED HEATING operating modes 79 Operation SDC DHC 80 5 2 5 2 Factory setting Setting range 5 3 Sensor error messages Heat generator error messages Heating system This parameter refers to the type of the heating system floor radiator or convector heating and can be matched to the exponent of the respective heat distributor Using its progressive characteristics the set value determines the curve characteristics of the heating curve of the direct heating circuit and compensates for the losses in output in the low temperature range with it The following settings are recommend depending on the type of heating system UFH Slightly progressive heating curves for floor or other area heating RAD Progressive standard heating curves for all radiator heating with m val
60. minimum temperature limit EN2H 0221GE51 R0808 SDC DHC Hydraulic Components See also 7 1 2 Function EN2H 0221GE51 R0808 Separate start up protection for heat generator and heating circuits This function allows separation of the temperatures for switching on the burner and switching off the heating circuit when the boiler temperature falls below the boiler minimum temperature limit 5 2 4 DHW menu pg 77 Heat generator minimum temperature limit To protect the heat generator from condensation formation the minimum temperature limit specified by the heat generator manufacturer is to be set The heat generator switches on when the temperature falls below the set value while it switches off when the set value plus the burner switching differential is exceeded During heating the set limit value is not undershot The setting of this parameter is used solely for the response of the heat generator burner to the set minimum temperature KT wez The function for the heat generator remains unchanged The mode of operation of the set limit is defined via the Heat Generator menu heat generator start up protection parameter There are three different modes of operation for the minimum temperature limit Minimum limit based on demand As long as there is no demand from heating or hot water the boiler remains switched off The minimum limit is disabled The burner is switched on and the heat gener
61. must operate at the temperature required by the hot water demand Direct heating circuits remain switched off Hot water loading with priority operation in the system has priority The mixed heating circuits must shut in this case 7 2 10 Circulation pump control mode During service water loading it should be possible to switch off the circulation pump Setting New parameter Hot Water Circuit menu parameter 16 circulation pump Access level HS heating specialist Function 1 Function as before 2 While hot water loading is active the circulation pump is switched off EN2H 0221GE51 R0808 155 Hydraulic Components SDC DHC 156 7 2 11 Operation Function 7 2 12 7 2 13 Switch off of district heating control District Heating menu parameter 01 Setting range is extended to OFF 10 50 Setting OFF means district heating is deactivated District heating valve permanently in STOP position when deactivated The switch over of the heat generator is controlled from the District Heating menu parameter 01 Return interval flushing If the return max limit is active and the district heating valve is opened less than 5 the district heating valve is opened to 10 every 10 minutes for heat demand so as to obtain an adequately precise return temperature measurement This assures that the limit sensor is adequately supplied in the return Heat meter for additional limitation according t
62. of the burner If the energy in the buffer is not sufficient the burner will be started If a heat generator disable is active e g through external burner disabling via contact or cycle disable solid fuel solar this will only result in the suppression of the demand for the burner The buffer setpoint temperature is the temperature that the buffer tank has to provide for supplying the connected heating circuits It corresponds to the highest demand value of these heating circuits Example Demand value MC1 45 C Demand value MC2 55 C Demand value hot water 65 C gt buffer setpoint temperature 65 C A required offset value e g hot water load temperature offset has already been taken into consideration in the demand value of the heating circuits When there is heat demand for the buffer tank from the heating circuits or from hot water this request will be maintained at least to the minimum temperature limit When the temperature drops below this limit the buffer tank is recharged by the heat generator under the conditions of the buffer start up protection If the buffer tank temperature exceeds the set value of the buffer tank maximum temperature limit forced switch off of the buffer loading pump occurs The excess heat is dissipated into the selected circuits see forced dissipation Forced dissipation is disabled and buffer operation is resumed when the temperature in the buffer tank drops more than 2 K under
63. operating mode see 5 2 3 3 Operating mode pg 74 gt Press button gt Set flashing room temperature specification to the desired value by turning the input button amp gt Confirm set value by pressing the button or the input button Alternative Automatic acceptance of the value after the set information time see 5 1 2 7 System information button pg 35 16 C 5 30 C Daytime hot water temperature button Sets the daytime hot water temperature during the hot water operational readiness times in automatic mode and in the PARTY and HEATING operating modes This set value also applies for exclusively hot water operation manual summer operation gt Press 9 button gt Set flashing hot water temperature to the desired value by turning the input button gt Confirm set value by pressing the button or the input button Alternative Automatic acceptance of the value after the set information time see 5 1 2 7 System information button pg 35 50 C 25 Operation SDC DHC Setting range One time hot water circuit loading TIM art D j m OAaAnomx do 5 1 2 5 9 A 26 5 C hot water economy temperature Maximum hot water heater temperature limit service setting Pressing and holding approx 3 s the button brings you to the reload function where the reload time can be set in minutes
64. parameters in this module refer to special settings with regard to total flow regulation This selection is only available if a total flow sensor is configured on one of the variable inputs see the Hydraulics menu parameters 08 09 or 10 Para Designation Setting range Setting values Factory Setting meter setting 01 Regulation 0 50 K 5 03 Regulation 1 600s 180 EN2H 0221GE51 R0808 109 Operation SDC DHC 5 4 13 Cascading menu CASCADE The parameters in this menu refer solely to the parameters that are associated with the cascading of multiple heat generators This selection is only available if multiple heat generators exist in the control system Para Designation Setting range Setting values Factory Setting meter setting 01 Switching 0 5 30 K 8 differential 02 Connection delay 0 200 min 0 03 Switch off delay 0 60 min 0 04 Switchover power 10 100 65 of stage sequence 05 Stage reversal OFF 1 to 250 h OFF 06 Guidance stage 1 maximum number of stages 1 07 Peak load stage OFF 2 maximum number of OFF stages All heat generators are numbered consecutively within the cascade The total quantity determines the maximum number of stages 08 Switchover of base OFF ON OFF load with grouping 09 Quick hot water OFF 1 maximum number of OFF connection stages 110 EN2H 0221GE51 R0808
65. temperature can be set by the heating technician Type of temperature measurement This function determines the type of temperature measurement in the hot water tank In general an electronic temperature sensor immersion sensor in hot water tank is used The temperature is measured via the change in resistance of this sensor here Alternatively hot water provision can also be controlled by a mechanical temperature controller thermostat switching contact A hot water thermostat is connected to tank sensor input and set to the required setpoint hot water temperature When the thermostat requires energy via the tank sensor input contact closed the tank is loaded with hot water at the set hot water maximum temperature until the contact opens again With hot water control through a thermostat the current hot water temperature cannot be measured and registered and will therefore not be displayed as part of the system information Also the hot water nominal temperatures cannot be set This function limits the temperature in the water heater upward based on the set value The desired water heater daytime temperature to be set on the user level is limited by this set value EN2H 0221GE51 R0808 SDC DHC Hydraulic Components NOTE Control mode EN2H 0221GE51 R0808 A ATTENTION Hot water maximum temperature limit is a function protecting the tank and terminates hot water loading If overshooting occurs the tank loadin
66. the party program Short term programs such as ABSENT or PARTY are skipped here See 5 1 2 5 Operating mode button basic display pg 26 One time extension of heating operation or intermediate heating during lowering operation outside the schedule 29 Operation SDC DHC Cancellation Factory setting Setting range Display NOTE Setting 30 An active party program can be cancelled early gt Press button gt Turn input button and switch to automatic mode The active party program has been cancelled P1 as from activation P1 P2 P3 0 5 to 24 h to the current time P1 P1 P2 P3 Program controlled resumption of heating operation After activation of the party program heating operation is continued until the following switch on time of the current automatic program P1 or P2 or P3 if enabled 0 5 24 h The set value is added on to the current time and represents the end of the party time When the party program is called up again the last set value is saved and suggested as the initial value An active party program appears in the basic display with information on the party end time Automatic mode In automatic operation max three time programs with different heating operation times are available They are called up during start up as factory set and unlosable default programs P1 P2 or P3 and can if necessary be overwritten with their own switching times in t
67. value Outside temperature 1 Min max value 0 00 to 24 00 hours Outside sensor connected and no fault message Outside temperature 2 Determined value Current value Variable input configured as OS2 Connection OS2 to variable input VI1 VI2 or VI3 Outside temperature 2 Min max value 0 00 to 24 00 hours OS2 connected no fault message EM SET energy EM SET Highest hot water setpoint management and highest heating circuit setpoint setpoint in the system Heat generator Setpoint Actual Heat generator Code 1 only appears if BS2 temperature 1 _ value specified is present Heat generator Setpoint Actual Variable input Connection BS2 to variable temperature 2 value configured as BS2 input VI1 VI2 or VI3 EN2H 0221GE51 R0808 37 Operation SDC DHC Information Display Condition Remarks Return Setpoint Actual Return sensor Connection of return sensor temperature value connected and one of to associated variable input the functions for return 1 or 2 VI can no longer be increase is active called up Flow sensor of Setpoint Actual With district heating district heating value controllers valve VF 1 Return sensor of Setpoint Actual With district heating district heating value controllers valve VFB External heat Disabled mode External heat generator External contact to variable generator disable ON OFF disa
68. water circuit switch water circuit ing differential Symmetrical effect around the hot water circuit setpoint 11 Hot water charging 0 60 min 5 pump follow up time 90 EN2H 0221GE51 R0808 SDC DHC Operation Para Designation Setting range Setting values Factory Setting meter setting 12 Circulation pump AUTO Active hot water circuit AUTO switching time time program program 1 P1 direct heating circuit 2 P2 direct heating circuit 3 P3 direct heating circuit 4 P1 mixed heating circuit 1 5 P2 mixed heating circuit 1 6 P3 mixed heating circuit 1 7 P1 mixed heating circuit 2 8 P2 mixed heating circuit 2 9 P3 mixed heating circuit 2 10 P1 hot water circuit 11 P2 hot water circuit 12 P3 hot water circuit 13 Economy interval 0 setting value of parameter 14 5 pause of circu Switch on interval while the lating pump circulating pump is running 14 Economy interval 1 60 min 20 cycle period duration 16 Circulating pump 1 Normal operation 1 2 Switched off during hot EN2H 0221GE51 R0808 water circuit charging 91 Operation SDC DHC Para Designation Setting range Setting values Factory Setting meter setting 17 Behaviour of heat AUTO Setpoint at heat gen AUTO generator during erator depending on follow up time demand OFF Heat generator off during follow up time of solar charging pump 5 4 4 Direct heating cir
69. water circuits receive priority supply of energy When the buffer temperature exceeds the buffer setpoint by 2 5 K the 3 way switching valve is hydraulically coupled to the lower region of the buffer tank so that the entire buffer tank can be loaded Another switch over to the upper region of the buffer tank is initiated as soon as the buffer temperature undershoots the buffer setpoint temperature by 2 5 K Partial buffer loading with priority supply for heating and hot water for all types of loading control modes see buffer control modes 1 2 and 5 215 Hydraulic Components SDC DHC Hydraulic function 7 3 9 Setting range NOTE 216 If the output is deactivated de energised the buffer is loaded valve position A AB discharge deactivated If the output is activated energised only the top region of the buffer is loaded valve position B AB discharge activated Switching SDHPE 5 K fixed differential Switch on Buffer setpoint Switch off Buffer setpoint 5 K Easy enabling and disabling of a heating pump The stages of the heat generator then heating pump should be able to switch off below a settable outside temperature OFF 20 30 Special handling of heat generator version setting 3 With a setting of heat generator type 3 2x single stage special handling with regard to the outside temperature disable occurs so that a heating pump can be combined with supplemental heat generator
70. with direct or indirect return control When the heat generator return temperature drops below the set limit the respective return control device is activated and raises the return temperature until the set temperature is reached or exceeded 5 4 8 Return increase menu RETURN CONTR Pg 105 159 Hydraulic Components SDC DHC 7 2 17 1 Function NOTE 7 2 17 2 Function 160 Bypass pump RBP The simplest way of controlling the return flow temperature is by means of a bypass pump When the return temperature in the heat generator drops below the set boiler return minimum temperature limit flow mixing is initiated by switching on a bypass pump parallel to the heat generator As soon as the return temperature rises above the return minimum temperature plus the return switching differential the bypass pump will be deactivated after the set delay time extended pump running time bypass pump As the mixing itself is not controlled the bypass cross sections must be taken into account for the system layout When the switch off condition is reached the bypass pump is switched off with a time delay in accordance with the set value To avoid intermittent operation of the bypass pump the return sensor must always be positioned downstream of the mixing point for this mode of return temperature control Return maintenance through controlled feed water addition If the control unit is equipped with a mixed heating ci
71. with mixed heating circuits that are in heating operation as well It does not affect a heating circuit in reduced operation To avoid excessive pulsing we recommend enabling the connected consumers heating and hot water circuits with staggered switch on times This function does not affect direct heating circuits Indirect return control is only feasible for systems without bypass pumps and without controlled flow mixing Heating circuit General heating circuit functions Heating curve The prerequisite for a constant room temperature is the exact setting of the heating curve of the relevant heating circuit as well as a correct design of the heating system on the part of the heating technician according to the heat demand calculation If adjustments are necessary they should be made in small steps at a distance of a few hours to assure that a steady condition is obtained 161 Hydraulic Components SDC DHC 162 7 3 1 2 Differences that can be balanced by installing a wall device see available accessories may occur between the measured room temperature in the inhabited area and the desired room temperature Heating curve setting heating curve Press and hold the input button for 3 seconds to access the Heating Curve menu WSS BINNS N The slope of the heating curve describes the relation between the change in the flow temperature and the change in the out
72. 1 2 3 wall devices DC MC1 MC2 assigned to operated controller Example m t N mae dd LY wh M Za The central device is operated at address 10 Two central devices are found in the bus system addr 10 and 20 A wall unit MC1 is connected addr 12 to central device 10 An additional mode is found in the bus system 9 EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 4 Sensor error messages Heat generator error messages Logical error messages Bus error messages EN2H 0221GE51 R0808 Error messages A ATTENTION Inform the heating technician whenever any fault messages are output The control device contains substantial error notification logic The error messages appear in continuous alteration with the basic display Multiple errors that occur at the same time appear one after another in the order in which they occurred The following types of error message exist Sensor measured values that do not lie in the measurement range are evaluated as an interruption or short circuit They appear depending on the type and allocation with fault code 10 to 20 and index 0 for short circuit or 1 for interruption These error messages evaluate the respective switching status They appear depending on the type and allocation with fault code 30 to 40 and index 0 1 or 2 These error messages evaluate the control result to be expected They appear depending on the type
73. 13 Lead time of boiler O 10 min 0 circuit pump or parallel heat generator enable only with appropriate configuration in the Hydraulics menu 14 Follow up time of 0 60 min 2 boiler circuit pump only with appropriate configuration in the Hydraulics menu 15 Follow up time of O 60 min 2 feeder pump only with appropriate configuration in the Hydraulics menu 16 Exhaust gas OFF Display of exhaust gas OFF temperature temperature only monitoring only 0 60 with appropriate configuration in the Hydraulics menu Heat generator lock if min limit value is exceeded for set time SLT Heat generator lock if limit value is exceeded 17 Exhaust gas limit 50 500 C 200 value only with appropriate configuration in the Hydraulics menu EN2H 0221GE51 R0808 101 Operation SDC DHC Para meter Designation Setting range Setting values Factory setting Setting 19 Modulation of proportional range Xp 0 1 50 K 5 20 Modulation of sampling time Ts 1 600 s 20 21 Modulation of adjustment time Tn 1 600 s C 180 22 Modulation of runtime 5 600 s 23 Modulation of start time 0 900 s 60 24 25 Modulation of start power Outside tempera ture lock not if parameter 01 OFF 0 100 OFF 20 to 30 C 70 OFF 26 Ba
74. 26 EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 11 3 7 3 11 3 1 Function oa mt OM CO EN2H 0221GE51 R0808 Operation of wall devices Operation of digital wall device SDW 30 A digital wall device SDW 30 can be connected to the control device With a digital wall device remote control for a central device e g from a living room is possible in addition to the room temperature detection Settings can be carried out for all the existing heating circuits The bus address of the wall device is used to specify the heating circuit on which the room sensor room influence is to act When an SDW 30 is connected for the first time to the bus system the address is selected for the heating circuit to which the SDW 30 is to be assigned bus address After the input has been confirmed feedback of the heating circuit DC MC1 MC2 and the central unit CU to which the digital wall device has been assigned is output Assignment is carried out on the basis of the following table Address CD address Assignment 11 10 CU 1 Direct heating circuit 12 10 CU 1 Mixed heating circuit 1 13 10 CU 1 Mixed heating circuit 2 21 20 CU 2 Direct heating circuit 22 20 CU 2 Mixed heating circuit 1 23 20 CU 2 Mixed heating circuit 2 31 30 CU 3 Direct heating circuit 32 30 CU 3 Mixed heating circuit 1 33 30 CU 3
75. 43 eee 238 7 3 13 3 Relay function LeSliovies leu lele l a al eetaa talee 239 7 4 Eror MeS aO S 22 6 Fekete et enter ct ete td nated aati ett anc nce ant eee eae mee meses 243 7 4 1 Basic display fault stack fault MESSAGES 0 0 cece eeeeeeeeeeeeeeeeeeeeee 248 7 4 1 1 Sensor calibration sceeeceeeseeeeeeeteeeeeeeteeeeeneeeeseseeeees 249 7 4 1 2 Full controller reSetc ing 60 lod foe ok bt eo ee eel ies 249 7 4 1 3 Controller time Correction s ss eeeseeeeeeeteeeeeeeeeeeeeeetees 249 8 TECHMIGal ata a pos cn ses vencnsasnenetens araa aaea aa ncupenesmentite mmrepimesmentite mreneee ements 250 8 1 General oee ee ee teete teet Ee ee Ee EES et emereceecnereiter cmeredeeemereiteeemerenctenecent 250 8 1 1 Installation recommendations cece eee eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 251 8 2 Sens rrtesistance vales ncececeieieieeninen eniin inenten renien ieee i enie ei ek eeki terie 251 syed We Lh 9 0 reece tate De eet rete DE ene a e ere e a E 251 C22 APT WOOD se ceeecoseconseasecdscweskeanecddeed eevee E EEE 252 8 3 Sensor Measurement ranges 2 4 2 224 c0e ceeeeeenceeeceeeceeeeneccneectenceeeenenceecencnes 252 8 4 Digital inputs a ended eel hl sed eh leat ee heat i he ae ele ieia 253 9 AS ER ena er n Ee MS n N mn Rn 254 Ta gt Gaerne er peter erent ier teenerer eer ier teenerer terse er teanener reenter reenter ret eter ree rere E EEA err te ere rer ee 255 EN2H 0221GE
76. 51 R0808 9 Contents SDC DHC 10 EN2H 0221GE51 R0808 SDC DHC Software version 2 1 2 2 NOTE EN2H 0221GE51 R0808 Software version This documentation is valid for software version V 3 0 of your control device The software version is displayed after switch on for approx 8 s If you are using an older software version please contact your heating technician Safety instructions Intended use The SDC DHC Smile family of controllers was designed for the sole purpose of regulating and controlling hot water heating and district heating systems including hot water production that do not exceed a maximum flow temperature of 120 C Requirements for start up A ATTENTION The heating system must be complete and filled with water so that the pumps do not run dry and the heating boiler is not damaged The control equipment must be installed in accordance with the installation instructions All electrical connections voltage supply burner mixer motor pumps sensor wiring etc must be carried out by the technician in accordance with the applicable VDE regulations and correspond with the circuit diagrams If floor heating is connected a limiting thermostat must also be installed in the flow line after the heating circuit pump This switches off the pumps at excessive flow temperatures Before starting up the controller have the heating technician check all requirements listed above The current ti
77. 7 Honeywell Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sarl Ecublens Route du Bois 37 Switzerland by its Authorized Representative Automation and Control Solutions Honeywell House Arlington Business Park Bracknell Berks RG12 1EB Phone 44 1344 656000 Fax 44 1344 656644 http noneywell com uk Printed in Germany All rights reserved Subject to change without notice EN2H 0221GE51 R0808 d
78. 9 emergency operation without outside sensor 121 Control Functions SDC DHC 122 6 8 4 Function 6 8 5 Function See also 6 8 6 Outside temperature disable The purpose of outside temperature disable is to prevent the heat generator from starting up above a defined outside temperature If several heat generators are controlled though one device automatic stoker 2 stage all stages of the device will be disabled with outside temperature disable In the case of cascaded systems with multiple devices the entry of an outside temperature disable is possible for each central device so that individual levels can be blocked by the outside temperature disable Climate zone The climate zone is the coldest outside temperature value to be expected For the heat demand coverage this value is taken as the basis for the design of the heating system This parameter defines the corresponding slope value of the heating curve of the heating circuit with regard to the climate zone 5 2 3 System Parameters menu Pg 72 Design temperature Until now configuration of the heating curve calculation occurred via the values e Climate zone TaNnorm e Slope S e Heating system m value Supplemental to the slope the setting of the design temperature TvLNorm IS also possible directly at the controller Setting range DESIGN TEMP Setting range HCmin to HCmax C There is a direct relation between
79. 93 Operation SDC DHC Para Designation Setting range Setting values Factory Setting meter setting 12 Minimum 10 C to setting value of 20 temperature limit parameter 13 13 Maximum Setting value of parameter 12 to 75 temperature limit Setting value of parameter 30 in Heat generator menu OEM maximum limit 14 Temperature 5 20 K Direct increase of heating heating circuit circuit 0 15 Extended pump 0 60 min 5 over run 16 Screed function OFF OFF 1 Functional heating 2 Screed drying heating 23 Room control 1 100 8 C factor SDW 30 only 24 Room control Tn 5 240 min 35 SDW 30 only 25 Holiday operating STBY Standby STBY mode RED Lowering operation 26 Room setpoint OFF 0 5 to 60 K h OFF ramp 41 Switch on OFF OFF optimisation 1 Adaption off 2 Adaption on 3 Adaption restart 42 Min pre heat time O setting value of parameter 43 0 5 43 Max pre heat time Setting value of parameter 42 to 5 30h 44 Min jump back 0 30 C 5 temperature 45 Without room 0 10 C 1 sensor 94 EN2H 0221GE51 R0808 SDC DHC Operation Para Designation Setting range Setting values Factory Setting meter setting 46 Pre heat time at 0 30h 1 0 C 47 Lowering ramp 0 500 100 Heat Heating circuit 00000 ZZZZZ ing name circuit name 5 4 5 Mixed heating circuit 1 2 MIX VALVE
80. Burwwesbolg 6 8e Le 9e Ge ve ee ce Le oe dajyoueled EN2H 0221GE51 R0808 52 Operation SDC DHC uoneiqijes Josuas z sebessow yne4 W30 ueloiuyos Buryeay Jasn s Aejay SUOIJOUNY BdIAIBS snq eq Buipesseg 101 U09 MO 2 0 L Jayjng len pllos ejos se lul UIN JOY Bupeey 3914S1A s1 UNO9 Jnoy Bulyesedo pue dn pg s Jauing Z abe s jo Buiy s y Joyesauab yeay sujyed jo1yU09 syinouio Bulyeay uoljeinByuoa Pp Ra dwe Bunamo DY spec eee eu yeay aid xe w yeey aJd Ul gonesiuindo N an saa ynos Bune H 7 T ye awa Je y ld WOO NOY yoeg dwnf ul BRT a sea Te UO YOHIMS Joy Jo uoH sod Bupeoy pexiw anns neun Ginan dweu Bunamo 900 JOSSS ameechwen w ze y Jd xe lI ze y zd Ul uonesiunde uno yinoulo Buyeay T ye aun yeau aig WOO NOUWA yoeq dwnf ul een n Ba IW UO YOUMS Buyjeey joerg 13 eM JOH dJayawesed waysks uoljeinByuoa soineipAY ya Burwwesboig weu Ly 9v Sb vv er zv Lb Ob anes unos BunesH 53 EN2H 0221GE51 R0808 Operation SDC DHC Nuvevevvuveveuvuvuvruvevevvuvuvevuuulyy gt lt gt ARPA AARRAR ADAM ARS ARALAAAAALAAOAAAAL AD NOTE Application Access Setting Returning 54 Time Date menu The following current calendar values can be specified in this menu
81. Dj jo o o mm o BOR HOE HOR BOR Ol Oo jol oj jo oc jo ol iO The individual devices in the SDC DHC 43 bus system contain a unique address It is set in the corresponding parameter in the Data Bus menu Assignment is carried out using the table below Address Device type Assignment 10 SDC DHC 43 Central device 1 as base unit 20 SDC DHC 43 Additional central device 2 30 SDC DHC 43 Additional central device 3 40 SDC DHC 43 Additional central device 4 50 SDC DHC 43 Additional central device 5 There must always be a control device with the bus address 10 in the bus system 221 Hydraulic Components SDC DHC 222 7 3 11 2 7 3 11 2 1 7 3 11 2 2 7 3 11 2 3 7 3 11 2 4 7 3 11 2 5 Note that bus addresses can only be issued once Duplicated addresses cause problems on the data bus Control functions via the data bus Boiler start up protection If the selected heat generator operates with boiler start up protection it signals the status of start up protection to all the corresponding heating circuits They block the energy tapping pumps off mixed heating circuit closed for the period of the start up protection Indirect return increase The heat generator in the base unit addr 10 transmits its current boiler data and each mixed heating circuit in the system can carry out indirect boiler return increase Tank control mode tank priority operation Ea
82. EF BRIEF BRIEF FLASHING FLASHING FLASHING Error at address setting FLASHING ON ON Bus fault as well as ON FLASHING ON indication when parameters are disabled Party can be set via OFF OFF FLASHING central device Absent can be set via FLASHING OFF OFF central device Holiday can be set via OFF Flash OFF central device Definition Flashing 0 8 sec on and 0 8 sec off Brief 0 08 sec on and 0 7 sec off flashing Flash 0 08 sec on and 1 4 sec off The operation indication is updated immediately after adjustment when adjusted at the SDC 10 and at the latest after about 20 sec after adjustment when adjusted at the central device In all other control modes not defined in the table above all three LEDs are activated EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 11 3 3 Function 7 3 11 3 4 Function Set value Application EN2H 0221GE51 R0808 Operation with NTC 20K room temperature sensor Instead of the RFF an NTC 20 room sensor can be connected to a sensor input VI1 VI3 Configuration is carried out in the Hydraulics menu parameter 08 09 or 10 Assignment to the heating circuit to be acted upon by the room sensor is carried out via a fixed heating circuit assignment using parameter settings e g 30 DC 31 MC1 32 MC2 The combined operation of an NTC 20 room sensor and an SDW 10 SDW 30 room sensor for a heating circuit is not pos
83. For monetary reasons hot water tanks are not used in many district heating systems especially in Eastern Europe The hot water setpoint temperature is held in a closed loop pipeline here see hydraulic example SF w SLP b MK VF a Flow from closed loop b Draw off points pipeline Minimum spread between the tank sensor and the return sensor from which an offset at the valve is given see Mixed Heating Circuit 1 Mixed Heating Circuit 2 menu parameter 39 e Additional value for offset in K deviation valve staring point for controller see Mixed Heating Circuit 1 Mixed Heating Circuit 2 menu parameter 40 EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Activation Opening offset EN2H 0221GE51 R0808 gt Set quick hot water control in the Hydraulics menu parameters 03 and 04 MC 1 MC 2 set value 39 The tank loading pump is operated via the tank loading pump output on the controller The mixed heating circuit pump output switches together with the tank loading pump The OPEN and CLOSED outputs of the assigned mixed heating circuit are provided fixed to actuator operation The mixed heating circuit 1 flow sensor is automatically assigned as a return sensor The mixed heating circuit pump runs continuously except in the STANDBY and HOLIDAY control modes With quick hot water control parallel operation is generally dominant The control valve is operated via two rela
84. Honeywell Smile SDC heating and district heating controller SERVICE MANUAL Honeywell OxsNOreReo 2 A C EN2H 0221GE51 R0808 EN2H 0221GE51 R0808 EN2H 0221GE51 R0808 SDC DHC Contents Contents 1 SOMWAIE ETOT a ana aaa ahaa ana shaaanaashaeanaen 11 2 Safety MUSEU C UNOS nica cee ch cece cece ec ecco eee ve ve EN 11 2 1 Intended se a ais Sante hens ie Sos So id Dd oie Soni ld Ded oie Sg nd Dead os a Bod oni St ce 11 2 2 Requirements for start Up cccceeesseeeeeeececeeeeeesseeeeeeeeeeeeeeeaaseeeeeeeeeeeseeeaaeeess 11 2 2 1 Power supply sessnicadedcscoadationentedaoncadadinacnsnbabaoniababarnsabanacaduiabsbalnbaedinedboteed 12 2 2 2 Connection conditions scx lt 5 cieeded dee dce does ctelatecate ccciateleianate cutee 12 2 2 3 Cable cross sections tei cel eect atc ectl cetera cece Ra Le 12 2 2 4 Maximum cable lengths ccc tecntecteesterctsdenadeeneetnentndanndeencatnceindatere teeters 12 2 2 5 Cable installation cscs scat eet ee eee eee 12 2 2 6 Grounding and Zeroing xcs cisco eos ck is oats cate calcsa caval satdeel saesech lt 13 2 3 Hot water temperature greater than 60 C ssessssssssssssssssssessseeeeseseeereeeeerreeeeeeene 13 2 4 Connection of accessory parts 2 2 22 2 cecceeceeeeeeeeeeeeeeeeeeeeeeececeeeeneeeeeeeeeeceenes 14 2 5 Maintenance and cleaning 2 2 c ceeeeeeeeeeeeeeeeeeeeeeeeeeeeneeeeeeeeeseeeeeneeteeeeeeeeneeee 14 2 6 Safety precautions for EMC compli
85. LH feeder CHP boiler circuit KKP1 KKP2 fault message SMA return RLP buffer PLP solid fuel FSP heating circuit HKP constant KP timer CLOCk District heating Heat generator specified With district heating valve volume flow controllers District heating Heat generator specified With district heating valve capacity controllers Heat generator 1 start ups Operating hours of heat generator 1 Heat generator specified Heat generator specified Information on the number of heat generator switch ons burner start ups of the multi stage heat generator Information on the number of heat generator operating hours of the multi stage heat generator 42 EN2H 0221GE51 R0808 SDC DHC Operation Information Condition Remarks Heat generator switch ons stage 2 Multi stage heat generator specified Information on the number of heat generator switch ons burner start ups of the second stage Heat generator operating hours stage 2 Multi stage heat generator specified Information on the number of heat generator operating hours of the second stage Test temperature for measurement purposes Operating status of ext switching modem KVT sensor connected and VI configured VI configured as switching modem Controller independent test temperature sen
86. Mixed Heating Circuit 2 parameter 28 The cooling function must also be activated via parameter 28 heating circuit cooling setpoint temperature in the Mixed Heating Circuit 1 Mixed Heating Circuit 2 menu for each heating circuit The cooling function for the corresponding heating circuit is active if a setpoint temperature was configured lt gt OFF the cooling function is active for the corresponding heating circuit The output for the cooling function works without pump forced operation Wall device functionality limitation If a wall device is connected to a heating circuit all factors that influence a room remain ignored during active cooling correction 177 Hydraulic Components SDC DHC 178 of room setpoint thermostat function room controller setpoint etc Switch over from heating mode to cooling mode If the outside temperature is greater than summer switch off see System Parameters summer parameter and the switch on temperature for cooling the cooling function is active If the outside temperature is lower than the summer switch off and the cooling switch on temperature of cooling 1 K the cooling function is not active A switching differential is required With the cooling function active the cooling switch over output in the Hydraulics menu parameter 06 07 setting 25 ON This is switched on inversely via an input on the heat pump If cooling mode is interrupted due to t
87. Mixer motor 2 test STOP OPEN CLOS STOP 07 Storage charging OFF ON OFF OFF pump test 08 Variable output 1 OFF ON OFF OFF test 09 Variable output 2 OFF ON OFF OFF test 10 System Display of sensor value by pressing the input button 5 4 16 Error messages menu ALARM Error messages that occur are displayed in this menu The fault memory can hold max 20 messages which can be displayed individually Para Designation Setting range Setting values Factory Setting meter setting 01 Error message 1 Last error message Display 02 Error message 2 Last error message but one Display 03 Error message 3 Last error message but two Display 04 Error message 4 Last error message but three Display 05 Error message 5 Last error message but four Display 20 Error message 20 First error message Display 21 Reset error SET by pressing the input button 112 OEM EN2H 0221GE51 R0808 SDC DHC Operation 5 4 17 Error messages 2 menu ALARM 2 Only in conjunction with heat generator interface Error messages triggered by an automatic stoker are displayed in this menu The fault memory can hold max 20 messages which can be displayed individually For this purpose parameter 28 in the System parameters menu must be set to ON Para Designation Setting range Setting values Factory Setting meter setting 01 Error message 1 Last error message Display 02 Error message
88. N2H 0221GE51 R0808 Heating curve Determines the heating curve for the heating circuits The heating curve describes the relationship of the flow temperature change to the outside temperature change With a larger heating surface such as with floor heaters the heating curve has a less extreme slope than with a smaller heating surface e g radiators The set value refers to the lowest outside temperature used for heat demand calculation Ay ATTENTION This parameter must be set by the technician and should no longer be changed gt Press and hold input button for 3 s gt Turn the input button to select the desired heating circuit HC MC 1 or MC 2 and confirm it by pressing the input button The design temperature system appears at the bottom right hand side of the display gt Press input button The slope of the heating curve appears at the bottom left hand side of the display gt Set the flashing heating curve value by turning the input button design temperature also flashes and is changed automatically depending on the slope of the heating curve gt Confirm by pressing the input button Alternative Automatic acceptance of the value after the set information time see 5 1 2 7 System information button pg 35 gt Press button to return to the basic display 0 2 3 5 47 Operation SDC DHC 48 Factory setting 5 2 Access Direct heating circu
89. NG LOWERING AUTOMATIC MODE After control mode selection the selected control mode is transferred to the central device Only the control mode of the heating circuit to which the SDW 10 is assigned is transferred The heating circuit is controlled constantly in accordance with the specification of the automatic program P1 P3 set in the central device plus or minus the room setpoint correction at the input button The heating circuit is controlled constantly in accordance with the desired daytime room temperature plus or minus the room setpoint correction at the input button The heating circuit is controlled constantly in accordance with the reduced room temperature plus or minus the room setpoint correction at the input button The function depends on the setting in the parameter selection for the heating circuit reduced parameter 229 Hydraulic Components SDC DHC Room setpoint correction Display NOTE 230 The input button can be used to modify the room temperature set at the central device by 6 K referenced to the central position Turn clockwise Temperature increase Turn anti clockwise Temperature decrease The indicator display is comprised of three LEDs The possible states are listed in the table below Control mode Function Moon LED Clock LED Sun LED Automatic OFF ON OFF Permanent heating OFF OFF ON Permanent reduction ON OFF OFF Start up phase BRI
90. P RBP jerii neinei ttl cnt fod e e 160 7 2 17 2 Return maintenance through controlled feed water addition 160 7 2 17 3 Indirect return increase lt lt ccceshee sees ee eeteeetheeeeeeeteeteeetieeeee 161 7 3 Heating SIDE UNE ereere e ee e pae iea aaee bleed eh ones 161 7 3 1 General heating circuit functions ssssessesererrrrrrrrrrrrrrrrrrrrrrrrnen ne 161 Pe Vs Heating CUVE eenen erene eet neee tsetahereuetahertueceherese 161 7 3 1 2 Heating curve setting heating Curve eee 162 TST Reduced OPE LANOM isisssxcssusisuhs wuStuxdsnuSdenSsuxbtexSiarteontsenidavicexberrcs 164 7 3 14 Heating system nacncncccncuGecuckcnekeenekeeeauese 164 7 3 1 5 Heating circuit temperature limit eee 164 7 3 1 6 Heating circuit temperature offset eres 165 7 3 1 7 Heating circuit pump extended running time 00 165 7 3 1 8 Screed function neineieneiee eee 165 7 3 2 Heating circuit constant temperature Control ceeceeeeeeeeeeeeeees 168 D3 SFIKEG VAlUS COMUOL ssc oases caters tates caterata E EERE 168 7 3 4 Consideration of the room temperature room influence 169 7 3 4 1 Heating circuit room CONNECTION eee eee 169 7 34 2 Heating Circuit room factor o ccccceeceeeeeseeeeeeeeeeeeeeeeeeeeeeeeeneeeeese 170 EN2H 0221GE51 R0808 Contents SDC DHC 7 3 4 3 Heating circuit room controller 0 2 02 eeeeeeeeeeeeeeeeeeeees 171 7 3 4 4 Switch on swit
91. S WOOL INOJIO Buyjesy aq ndul jqenea JO Josu uoneiqijeo osuag 6 ebessew yjne4 g eBessow yjne4 Z e6essew ney 9 ess w ney g ebessew yjne4 y eBessow yjne4 g eBessow yjne4 z ebessew yne4 L eBessew yjne4 OL ebessew yjne4 z sobessow yjne4 suoljouny 39S weysks 380 Aejoy snq eq Bulpeoseg 101 U09 MO 2 0 L wl Buluuns Sood papua xe duind race 3 j 4ng Buipeo Joung ist ung jeny ajoho smes dw 1S9 JOAO YOUMS ainyesadwie wunipew mE REE arama gouejeq Jejos 49A0 YOUIMS Bulpeo Jejos JJ0 YoUIMs eul jo Aoede yeay yeay jesoy syjed jo1 uo9 asealoul UIN ay synouo Buyeay uoneinByuog TREES N1119 197eM 0Y SONEN yndjno MO SLUN OA yndjno jewsay ywi UINA AJEA Buunp julodjes Buneey youysiq Jews Xew jo uoHesqued 40 uogelqied Buge y Psia mes dw qeu Joye1auab dx Buioyuow own oun d HO yeay jajjesed 6 ie 6 6 yed jeuonsiodoid Aree aumesedwsa Buluuns p pu zx Buluuns pepue xe 10 dwind nos PAATE a e ienee 10 e1 u3 yeoH se nj4 d NIJ 19JeM JOH dn ye s Jejlog Aejap uooauuog jo uoejnpoy seb nj4 dwnd 6uibseyg dwnd yinoulo sajiog Ja 10q Jo au Mo julodjes yuu aunyesodw9 dund n9419 Buyeay jo pwu ounyesodwe yuu aunyesodwia erie nen ZIL HN ej owl ajdwe dx ped uonouny pea L StU 9 S X Ped d wnwxew unay HOUNY p S Jo ow dn mojlo4 ye
92. Temperature key 5 2 3 3 Operating mode Pg 74 EN2H 0221GE51 R0808 SDC DHC Control Functions 6 5 Switching from SDC to DHC 6 6 See also 6 7 Variable inputs EN2H 0221GE51 R0808 Language selection occurs after the controller is started You can then select the controller type e SDC heating controller or e DHC district heating controller SDC DHC appears on the top line The selection option SDC or DHC appears at the bottom right The controller type depends on the relay equipment or the set type max code Switching is only possible with relay equipment for which DHC types exist This is not the case with any others Switching the setting is also possible via a special system parameter The type code setting is identical for both versions i e the type code numbers of SDC equipment correspond to those of DHC equipment Reducing a controller to a heating circuit expansion via type code 21 or 22 functions only with a presetting to controller type SDC Selection of hydraulic parameter presettings Each controller type covers a specific hydraulic diagram in its as supplied condition Depending on the configuration variants there is also the possibility of adapting the system by means of further parameter settings to hydraulic diagrams differing from the standard hydraulic system With parameter 01 in the Hydraulics menu a preselection can be made from the hydraulic schemes collection Th
93. With a reload time of 0 minutes loading is started once and the hot water tank is loaded to the daytime setpoint The time for this superimposed hot water circuit loading can be set between 0 and 240 minutes The current week program is superimposed here Operating mode button basic display Sets the operating mode and returns to the basic display from every operating level EN2H 0221GE51 R0808 SDC DHC Operation Overview of the operating modes Symbol Operating mode Display Setting ABSENT i wie le ivi Od P1 P2 P3 return Hod Ve IN fi ro date aie ia ride d cide vik mt te Lt Osan Omrx CO PARTY aie ie P1 P2 P3 Yx a party end time eee AN ic hifoe tt ASOT xxO oh Pe a 2 0 JHS Os NOMmxdoO SUMMER CuMMeo P1 P2 P3 TILIhtrtre rn p w gt DERS n EL danom xxO rx ae HEATING T eoa bia OTs C6 q RED HEATING f n Pea Os NORmx dO STANDBY Ge YO ta O EN2H 0221GE51 R0808 P2 and P3 only after enabling see System Parameters menu parameter 2 P1 to P3 27 Operation SDC DHC Setting Return to the basic display NOTE 5 1 2 5 1 za DOT rm Ss e a m T T EA a E i Ex D E T OTT TO Setting Application 28 The selected operating mode appears in plain text whereby a marking at the bottom edge of the display points to the respec
94. a flow through calculation 2 Heat balancing via pulse input 106 EN2H 0221GE51 R0808 SDC DHC Operation Para Designation Setting range Setting values Factory Setting meter setting 10 Reset heat SET by pressing the input button balance 11 Volume flow 0 30 L min or L pulse 0 12 Density of medium 0 8 1 2 kg L 1 05 13 Heat capacity of 2 5 KJ kgK 3 6 medium 14 Final switch off OFF 90 to 210 C 210 temperature 15 Test cycle of solar 1 60 min 10 charging switchover 16 Switchover tem 20 110 C 75 perature 5 4 10 Solid menu SOLID FUEL The parameters in this menu refer to special settings with regard to solids regulation Enabling occurs only with corresponding activation in the Hydraulics menu Para Designation Setting range Setting values Factory Setting meter setting 01 Minimum 20 80 C 60 temperature 02 Maximum 30 100 C 90 temperature 03 Switch on Setting value of parameter 10 differential 04 3 K to 20K 04 Switch off 2 K to setting value of parameter 5 differential 03 3 K 05 Heat generator OFF 2 to 180 min OFF cycle inhibitor EN2H 0221GE51 R0808 107 Operation SDC DHC 5 4 11 Buffer menu BUFFER The parameters in this menu refer to special settings with regard to solids regulation Enabling occurs only with corresponding
95. a wide range of applications makes it possible to simplify operation 5 2 3 2 Time program Pg 73 117 Control Functions SDC DHC 118 6 3 Function 6 4 Function Enabling Suppressing the cycle temperature on time program level When programming switching times the specialist can set a system parameter to suppress the respective room or DHW temperature for the cycle Setting ON causes control of the respective circuit to be based on the cycle temperatures stored in the switching cycles For the OFF setting e All cycle temperatures are suppressed during switching time programming e Nominal room and DHW temperatures arise exclusively depending on daytime room temperature or daytime water heater temperature specification e All connected wall devices react identically to parameter changes in the central device Enabling Separate Control Mode To make operation as easy as possible for most of the applications a global control mode is set for all heating circuits when supplied For those rare cases in which a separate control mode is necessary e g for renters and landlords it must be enabled in the System Parameters menu Control Mode parameter This parameter determines the operating mode and affects the e control mode selected with the Control Mode key e daytime temperature selected with the Daytime Room Temperature key e night time temperature selected with the Night Time Room
96. activation in the Hydraulics menu Para Designation Setting range Setting values Factory Setting meter setting 01 Minimum 5 C to setting value of parameter 20 temperature 02 02 Maximum Setting value of parameter 80 temperature 01 to 95 C 03 Boiler temperature 10 to 80K 0 increase 04 Buffer switching 1 to 70K 2 differential 05 Forced discharge OFF OFF 1 In process water tank 2 In heating circuits 06 Follow up switch OFF setting value of parameter 10 on differential 07 2K to50K 07 Follow up switch 1 K to setting value of parameter 5 off differential 06 2 K 08 Buffer start up OFF No start up ON protection protection ON Start up protection active 09 Buffer discharge OFF No discharge ON protection protection ON Discharge protection active 108 EN2H 0221GE51 R0808 SDC DHC Operation Para Designation Setting range Setting values Factory Setting meter setting 10 Buffer operating 1 Heating circuit 1 mode charge regulation and hot water circuit 2 Heating circuit charge regulation without hot water circuit 3 Heating circuit and hot water circuit discharge regulation 4 Heating circuit discharge regulation without hot water circuit 5 Charge regulation with hot water circuit switchover 6 Discharge regulation for heat generator 11 Follow up time of O 60 min 3 buffer charging pump 5 4 12 Total flow regulation menu MAIN SUPPLY The
97. actual heat demand partial load stage full load stage II This switching differential is overlaid symmetrically on switching differential and must always be set to higher values In cascade mode this setting would be superseded by the cascade setting and is therefore not available Mode of operation with switching differential II e When the heat generator temperature is below switching differential Il stage is switched on without delay Stage II is enabled after stage II delay has passed see Heat Generator menu e Stage Il is switched off as soon as the heat generator reaches the setpoint temperature plus half of switching differential e Stage Il is switched on again as soon as the heat generator undershoots the setpoint temperature minus half of switching differential I e Stage is switched off when the heat generator temperature exceeds the set nominal value plus half of switching differential Il EN2H 0221GE51 R0808 SDC DHC Hydraulic Components EN2H 0221GE51 R0808 Combined operation for 2 stage heat generators As long as just one stage can meet the heat demand stage II inactive stage is switched according to switching differential As soon as stage 2 is needed to meet the heat demand switching differential takes over the switching on and off of stage II and switching differential Il takes over the switching of stage l
98. all below the setpoints Minimum temperature limitation is not active e incase of switch off in standby mode above the frost protection limit e incase of switch off in reduced automatic mode with the activated ECO function above the frost protection limit e incase of switch off in continuously reduced mode with activated ECO function e incase of automatic summer switch off e Floor minimum limit e Ventilation pre adjustment warm air curtain e Convector heating A ATTENTION To protect the floor heating systems against accidental overheating malfunction manual mode a controller independent maximum temperature limit must be provided For this purpose we recommend a strap on thermostat the switching contact of which is looped through the control phase of the respective heating circuit pump The thermostat is to be set to the maximum permissible system temperature 5 4 4 Direct heating circuit menu UNMIXED CIRC Pg 92 EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 1 6 Function Application See also 7 3 1 7 Function See also 7 3 1 8 NOTE EN2H 0221GE51 R0808 Heating circuit temperature offset For special applications this function offers the possibility to admit the heating curve of the direct heating circuit with a constant offset value The demand value plus the offset value is transmitted to the heat generator The displacement of the heating curve is carried out in
99. alue Return temperature with circuit 2 return return maximum limit temperature Direct heating Setpoint Actual Direct heating circuit Setpoint inquiry without room circuit room value specified temperature sensing temperature Current room setpoint of direct heating circuit Mixed heating Setpoint Actual Mixed heating circuit 1 Setpoint inquiry without room circuit 1 room value specified temperature sensing temperature Current room setpoint of mixer heating circuit 1 Mixed heating Setpoint Actual Mixed heating circuit 2 Setpoint inquiry without room circuit 2 room value specified temperature sensing temperature Current room setpoint of mixed heating circuit 2 Direct heating DC Thermostat function OFF temperature limit circuit thermostat THERMOSTAT specified exceeded function Mixed heating MC1 Thermostat function OFF temperature limit circuit 1 THERMOSTAT specified exceeded thermostat function Mixed heating MC2 Thermostat function OFF temperature limit circuit 2 THERMOSTAT specified exceeded thermostat function Solid fuel boiler Actual value VO1 2 configured as Connection of FSKF to temperature solid fuel loading pump associated variable input 1 or 2 VI can no longer be called up Solid fuel boiler Actual value Solid fuel loading pump at buffer temperature variable output corresponds to KSPF or FPF depending on configuration EN2H 0221GE51 R0808 39
100. ameter 8 variable input 1 16 Flue gas sensor set in the Hydraulics menu A flue gas sensor can only be connected to the variable sensor input VI 1 Due to the high temperatures involved a PT 1000 sensor is used for this purpose The control device automatically evaluates the sensor data which are different from the data supplied by the standard sensors When a sensor fault is detected with the flue gas sensor active and if flue gas monitoring was set for temporary disable or permanent inhibit safety functions there will be a heat generator switch off in addition to the malfunction message This function controls the necessary measures in case the flue gas temperature exceeds the allowable limit Display of flue gas temperature only No follow up function the actual flue gas temperature is displayed in the Information display Heat generator lock if limit value is exceeded for set time When the temperature limit is exceeded the heat generator is disabled for the set time and a fault message is sent Heat generator lock if limit value is exceeded EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Flue gas temperature limit See also 7 1 20 OFF AUTO Feedback only Free counter NOTE EN2H 0221GE51 R0808 When the temperature limit is exceeded the heat generator is disabled and inhibited permanently It can only be unlocked by a reset in the Fault Messages menu With the parameter set acco
101. and allocation with fault code 50 to 60 and index 0 1 or 2 These error messages refer to address faults such as double issuance or non recognition of address settings on the data bus They appear with fault code 70 and index 0 or 1 depending on the type and assignment The display and further processing of logical fault messages can be suppressed through corresponding configuration Detected faults are proceed via e Display in the basic display of the controller e System fault via display on the information level with the corresponding information value e Inclusion in the fault log see below for description e If activated via switching of a fault message output e Forwarding via the data bus 243 Hydraulic Components SDC DHC Fault messages Fault status Fault type Fault object Remark code System Flow sensor 1 Interruption 12 0 MCP off MIMO de energised System Flow sensor 1 Short circuit 12 1 MCP off MIMO de energised System Buffer sensor of Interruption 17 0 collector System Buffer sensor of Short circuit 17 1 collector System Flow sensor 2 Interruption 18 0 MCP off MIMO de energised System Flow sensor 2 Short circuit 18 1 MCP off MIMO de energised System Flow sensor of Interruption 19 0 collector System Flow sensor of Short circuit 19 1 collector 244 EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Fault messages Fault status Fault type Fault object Remark cod
102. ant installation ccccsseeeeeeeeeeeeeeeeees 15 3 OVGINVIEW aip eee tees 20 4 gt PADS VAC OINS aco cae ocak acs cad a cae ccecetctecccetanccadetatetacedanseede deteecuedanecate debsecuedanecste detedavedanstete 21 Lo Ram lt 1 o a meester aera act es ae ae eye ar em Pre Pr Pre Prey Pri Prey Pri Prey Pr Pre Pree Prey Peer ere 22 5 1 Display and operating elements 2 cccececeeceeeeceeeeeeeneeeeeeeeeeeeeteneeeeeeeeeeneetenees 22 5 1 1 Display basic Cis play 2 cexcces cesevesecencceseceneceseceneceseceneceseceneresecestcesecentee 23 5 1 2 Operating elements ck oa sae ee a i ht eae ee ce ceed 24 5 1 2 1 Input button press LONI ccsc cu cuse eidechs kbd cuss debdeese ebebe eid ee ed 24 5 1 2 2 Daytime room temperature button ce eeeee reer eres 24 5 1 2 3 Night time room temperature button eee 25 5 1 2 4 Daytime hot water temperature button ee 25 5 1 2 5 Operating mode button basic display ee 26 5 1 2 6 Switching time programs Holiday programs button 33 5 1 2 7 System information button dacveceidecesecestvesecedeeesceedeorseeesepeseceseee 35 5 1 2 8 Manual mode Emission measurement button 44 Contents SDC DHC 5 1 2 9 Access to the technician OEM area seenen 46 5 1 2 10 Heating CIN Oso ahah a Sa Ca ed ees 47 5 2 Menu selection TVS a fa i a i i cic Rican ea te a ce 48 5 2
103. ater Switch on time optimisation can occur either with or without a room sensor 171 Hydraulic Components SDC DHC Parameter settings for the switch on optimisation in the HC MC 1 and MC 2 menu Para Designation Setting range Setting values Factory meter setting 3 Room connection in OFF Display of heat generator OFF conjunction with room temperature room sensor off sensor operation active 1 Display of room temperature room sensor active operation active 2 Display of room temperature room sensor active operation disabled 3 Display of room temperature room sensor off operation active 4 Room factor OFF OFF 10 Influence active 500 RC Room controller active 26 Room setpoint ramp OFF 0 5 60 K h OFF 41 Switch on OFF OFF optimisation 1 Adaptation off 2 Adaptation on 3 Adaptation restart 42 Min pre heat time 0 set value of parameter 43 0 5 43 Max pre heat time Set value of parameter 42 to 30 h 5 44 Min jump back 0 30 C 5 temperature 45 Without room sensor 0 10 C 1 46 Pre heat time at0 C O 30h 1 47 Lowering ramp 0 500 100 172 EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Activation of switch on optimisation NOTE Parameter information EN2H 0221GE51 R0808 gt Set Parameter 26 room setpoint ramp to OFF gt Set parameter 41 switch on optimisation to 1 adaptation off or with connecte
104. athematical relation W V t p gt cW Ad tSOP The results can be seen on the information level W Heat balancing V t Volume flow of the heat carrier medium p Density of the heat carrier medium cW Specific heat capacity of the heat carrier medium Ad Temperature differential collector flow return This is an automatic function of the controller If the solar loading pump was switched off longer than 24 hours it is operated for approx 20 seconds to prevent blocking via corrosion Buffer tank function This function is only active if a buffer loading pump is assigned to a programmable switching output or if a buffer sensor has been connected to a variable input 199 Hydraulic Components SDC DHC 200 Function Control modes For stratified discharge an optional second buffer tank sensor PF2 can be connected to a variable input VI1 to VI3 The heat generator temperature is supplied by the temperature measuring device of the heat generator Buffer or energy tanks are used for storing energy that is available without control e g from solar power system or wood boilers This energy buffer covers the energy demand from heating circuits and hot water systems Additional energy demand can be covered by controlled heat generators boilers The buffer loading pump function ensures that a controlled heat generator supplies the additional energy to the buffer tank or the heating and hot water circu
105. ating valve but instead to the hot water pre control The hot water pre control forwards the setpoint taking into account the parameter defined offset to energy management and adjusts to the nominal value which was received from hot water loading at the mixed heating circuit actuator Any parameter defined return flow limiter sensor setting 7 8 at the variable input acts according to its set function on the actuator of the hot water pre control The switching behaviour of the tank loading pump is described in a separate demand The hot water pre control must be activated in the same control device as the associated hot water loading The mixed heating circuit minimum and maximum limits are not adjustable and have no effect The run down time of the mixed heating circuit pump runs parallel with the tank loading pump extended running time EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Function EN2H 0221GE51 R0808 The boiler parallel shift of the tank loading pump parameter acts on the mixed heating circuit demand The boiler parallel shift of mixed heating circuits acts on the heat generator provided the tank loading pump control mode has not been set to external storage tank The optional return flow limit acts on the flow mixture according to the setting The hot water pre control acts only on hot water loading configured in the same device Mode of operation Hot water pre control When ope
106. ator is heated up to the set minimum temperature limit as soon as the temperature in the heat generator drops below the fixed heat generator frost protection temperature of 5 C Conditional minimum limit The boiler minimum temperature acts as the lower limit which will be maintained even if there is no demand The boiler is switched off only if summer switch off is active Unlimited minimum limit 129 Hydraulic Components SDC DHC 130 See also 7 1 3 Function See also 7 1 5 Function The boiler temperature is maintained according to the set minimum temperature independent of demands or deactivating control modes 5 2 4 DHW menu pg 77 Maximum temperature limit heat generator In order to protect the heat generator against overheating the controller is equipped with an electronic maximum temperature limit It shuts off the burner if the temperature in the heat generator exceeds the limit value The burner is switched on again if the temperature in the heat generator falls below the limit value by half of the burner switching differential plus 2 K 5 2 4 DHW menu pg 77 Heating circuits minimum temperature limit e Ifthe boiler temperature BT actuai is less than or equal to the parameter setting 27 BTmin HC the heating circuit pumps switch off DHCP SFP MCP The mixed heating circuit valves close e If BTactual is greater than BTmin HC SCmin HC the heating circuit pumps and
107. ault program P1 Heating circuit Day Heating operation from to Heat generator heat Moto Su 6 00 22 00 ing circuit Hot water circuit Mo to Su 5 00 22 00 Mixed heating Mo to Su 6 00 22 00 circuit 1 2 Default program P2 Heating circuit Day Heating operation from to from to Mo to Th 6 00 8 00 16 00 22 00 Boiler heating circuit Fr 6 00 8 00 13 00 22 00 Sa to Su 6 00 22 00 MotoTh 5 00 8 00 15 30 22 00 Hot water circuit Fr 5 00 8 00 12 30 22 00 Sa to Su 6 00 23 00 l Mo to Th 6 00 8 00 16 00 22 00 E A Fr 6 00 8 00 13 00 22 00 Sa to Su 7 00 23 00 Default program P3 Heating circuit Day Heating operation from to Heat generator heat Mo to Fr 7 00 18 00 ing circuit Sa to Su Reduced Hot water circuit Mo to Su 6 00 18 00 Sa to Su Reduced Mixed heating Mo to Su 7 00 18 00 circuit 1 2 Sa to Su Reduced 62 EN2H 0221GE51 R0808 SDC DHC Operation 5 2 2 4 3 1 Source day Target day NOTE EN2H 0221GE51 R0808 Copying switching time programs days Block programming enables the switching times and cycle temperatures of any day of the week to be copied 1 To any days within the week Mo Tu We Su 2 To all weekdays Mo to Fr 3 To the weekend Sa to Su 4 To the entire week Mo to Su Calling up the copy function days See flowcharts on pg 65 gt Press input button to confirm the copy function gt Turn input button copied The respective au
108. based on the specified hot water temperature and the specified hot water switching time program Heating operation is stopped and protection from frost is provided This feature is only available when control mode is set to 1 See 5 1 2 5 Operating mode button basic display pg 26 Disabling enabling default programs P2 to P3 Disabling System Parameters menu program parameter P1 All heating circuits and the hot water circuit solely refer to the default individually programmed switching times in the time program P1 parameter Program P1 does not appear in the display in this operating mode see 5 2 2 1 Selection of the control circuit pg 56 and 5 2 3 2 Time program pg 73 31 Operation SDC DHC Enabling ChiMMceo System Parameters menu program parameter P1 to P3 see Sa E F i Ol eee 5 2 2 1 Selection of the control circuit pg 56 and 5 2 3 2 Time EEN r iii program pg 73 5 1 2 5 5 32 Manual summer operation appears in the basic display with the information SUMMER If default programs P2 and P3 were enabled the corresponding symbol OI OII or OMI is also displayed depending on the selected program The symbols are only displayed with the time program P1 to P3 active Continuous heating operation The HEATING operating mode ensures continuous heating operation without time limitations based on the specified daytime room temperature Hot water production oc
109. ble VI1 VI3 input VI1 VI2 or VI3 specified Flue gas Limit signal Variable input Connection only to variable temperature value Actual configured as AGF input VI1 value Water heater Setpoint Actual If hot water circuit is Code 1 only appears if SF2 temperature 1 value present is present Water heater Setpoint Actual Variable input Connection to variable input temperature 2 value configured as SF2 VI1 VI2 or VI3 Water heater Load condition Thermostat mode Thermostat instead of sensor temperature ON OFF SF1 only controller Demand via Demand VI configured as External contact to variable switching contact ON OFF demand contact input VI1 VI2 or VI3 VI1 Demand via Demand VI configured as External contact to variable switching contact ON OFF demand contact input VI1 VI2 or VI3 VI2 Demand via Demand VI configured as External contact to variable switching contact ON OFF demand contact input VI1 VI2 or VI3 VI3 Mixed heating Setpoint Actual Mixed heating circuit 1 circuit 1 flow value specified temperature Mixed heating Actual value Return temperature with circuit 1 return temperature return maximum limit 38 EN2H 0221GE51 R0808 SDC DHC Operation Information Display Condition Remarks Mixed heating Setpoint Actual Mixed heating circuit 2 circuit 2 flow value specified temperature Mixed heating Actual v
110. calculated switch off delay time BTactuat gt BT setpoint SD 2 or BTactuat gt BT max t gt tswitch on delay 100 dVT 100 VLSetpoint 100 StageSnumber StageSselection EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 12 3 3 7 3 12 3 4 EN2H 0221GE51 R0808 Control characteristics e The heat generator that was switched on last adjusts the system to the set nominal temperature e All other heat generators operate at the set maximum temperature base load e The boiler stage number can be reduced as soon as the adjusting stage has withdrawn its demand to the heat generator and the boiler temperature has risen above the setpoint temperature plus the set switching differential e For each heat generator the displayed setpoint temperature always is the currently demanded temperature to be adjusted to e A heat generator that is not available in the system malfunction external disable or outside temperature disable is ignored within the stage sequence The next available heat generator will be switched on instead Delay enabling full load in cascade operation The switch over power set within the cascade selection level is only intended for the operation of automatic stokers As long as the last burner stage is not started all burner stages up to that point which are currently operating are reduced to the specified switch over power power limit When switching on the last burner
111. case only programs of the hot water circuit are copied among one another if they were enabled in the System Parameter menu ee aie n i T Default copy function HC MC 1 MC 2 DHW iine Select source circuit circuit Select S eee source circuit ee circuit program C P1 G Select target circuit lect ee se ae citou Target circuit Target circuit Target circuit program MC 2 P1 IMC 2 P2 IMC 2 P3 amp Copy Acknowledge Program P1 direct heating circuit Program P2 mixed heating circuit 2 Copy additional heating circuits if necessary Exit Ci Basic display EN2H 0221GE51 R0808 67 Operation SDC DHC 68 5 2 2 4 4 Resetting HC Direct heating circuit MC 1 Mixed heating circuit 1 MC 2 Mixed heating circuit 2 DHW _ Hot water heating circuit 1 Program selection for source and target circuits are skipped if programs P2 and P3 are disabled in the System Parameter menu Reloading default programs See flowchart on pg 70 Individually created switching time program P1 P2 or P3 can be overwritten with the original default switching time program P1 P2 or P3 For this purpose select the DEFAULT TIME function within the heating circuit selection after accessing the Timeprograms menu After confirming by pressing the input button the circuit dedicated to reloading appears flashing HC MC 1 MC 2 ALL
112. case of hot water loading a special constant return setpoint applies It is valid only if the hot water loading pump is operating The return setpoint is to be set with parameter 10 Para Designation Range Presetti Step Unit meter ng 10 Hot water 40 100 90 0 5 C circuit loading Target return 149 Hydraulic Components SDC DHC 150 7 2 5 Display Hot water pre regulator with district heating systems The hot water pre control function is necessary for the controlled filling of hot water storage tanks with layered loading from the district heating network Generally such loading is carried out through a separate heat exchanger The function is activated via a new setting in the Hydraulics menu parameters 03 and 04 Function number 30 In the parameter tree for the heating circuits parameters 14 15 18 19 20 21 and 22 are available With the return flow limit activated parameter 17 is displayed too With the FLOW display the symbol WW for hot water pre mixing is displayed to the lower left When the pump status is displayed the string DEMAND is displayed instead of the control mode When the hot water pre control is active the respective mixed heating circuit cannot be used as a heating circuit anymore When the hot water pre control is active the request for hot water loading is not sent directly to the energy management unit and further to the district he
113. ccxtconbecet conbeced conbeces canbenntcon e ea e Eire 80 5 4 Parameter SeuingS ceneni neni nini eee Rene Bees BOER ROSE a es 81 54 1 Hydraulics menu HYDRAULIC siccccocassecscecesssesevaseveceuscosenedssecapndecavese 81 5 4 2 System parameters menu SYSTEM s sssssserrrrrerrrrrrrrrrrrrrrrrrrrnne 85 5 4 3 Hot water circuit menu DHW eect eeeteeeteeeeeeeeeeeeeee 89 5 4 4 Direct heating circuit menu UNMIXED CIRC c ceeeeeereees 92 5 4 5 Mixed heating circuit 1 2 MIX VALVE 1 MIX VALVE 2 MENUS saan Pact ed ie tanh ea sl hoo T E eE A A 95 5 4 6 Heat generator menu HEAT GENER 0 00 cess eee e eee eeeeeeeeeeeeeee 99 EN2H 0221GE51 R0808 SDC DHC Contents 5 4 7 District hot water menu DIST HEATING eese 104 5 4 8 Return increase menu RETURN CONTR eee 105 5 4 9 Solar menu SOLAR cscs cane rd cnd dnd sme endear dendoadundcamadendaaicdebatees 106 5 4 10 Solid menu SOLID FUEL ccccccccccceeeeeeeeeeeeeeeeeeeeseeeeeeeteeaes 107 5 4 11 Buffer menu BUFFER cccceeeeeceeeeeeeeeeeeeeeeeceeeeeeseseeeeeetenees 108 5 4 12 Total flow regulation menu MAIN SUPPLY 109 5 4 13 Cascading menu CASCADE 0 2 2 cccceeeeeeeeeeeeteeceeeetecteeeeneccees 110 5 4 14 Data bus menu BUS eie tegec2 otisad st suet encncentgate ceedencotene aavesuetenoneeicets 111 5 4 15 Relay test menu RELAY TEST ccceeceeceeeeeeee
114. ch central device can carry out hot water circuit loading For loading in priority operation hot water circuit loading that has been started disables all other heating circuits and hot water circuit loading within the bus system If tank loading occurs in parallel operation all heating circuits in the system remain active and an additional hot water circuit loading with set parallel operation can be activated Heating circuit demand Each heating circuit demand within the data bus system is processed by the base unit addr 10 It takes on the greatest demand and passes it on to the heat generators as a setpoint value A selected manual mode with manual temperature specification also counts as demand Clock synchronisation The time of day is sent to the entire system by the base unit addr 10 There is a system time EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 11 2 6 7 3 11 2 7 7 3 11 2 8 Example 1 EN2H 0221GE51 R0808 Room temperature transmission The wall devices send their current room temperature to the assigned heating circuit at regular intervals Fault messages Status indications Fault messages and status indications are sent from the central device to the associated wall units and displayed there Examples with multiple control devices Heating system with a two stage heat generator industrial water production and four mixed heating circuits The following diagram shows the hydraulic
115. ch off optimisation ceeeeeeeeeeeeeeeeeeeeees 171 7 3 4 5 Room setpoint ramMp cccccccccseesseeeeeeeeeeeeeeeeeseeeeeeeeeeeenees 175 7 3 4 6 Heating limit function 0 0 cece e cece eee e eee eeeeeeeeeeeeeeeeeeeeees 175 7 3 4 7 Heating circuit room frost protection limit 0 ee 177 7 3 4 8 Mixed heating circuits cooling switch over ee 177 7 3 4 9 Heating circuit MAMGHncin ect eet teeta lol a aloe 180 7 3 4 10 Room thermostat function maximum room temperature MIMME s aceececesecesezesccescbesecestPeseeenepedeceneredecestcesecest 181 7 3 5 Hot water production se Sets ct cctecteacteeltiececdies ave tieubvel Roce herteeldineted 187 7 3 5 1 Hot water tank loading SLP eeeeeeeeeeeeeeeeeeeeeeeeeeees 187 7 3 5 2 Circulation pump CIR eee cece cette eter eeeeeeeeeeeeeeeeeeeeees 194 7 3 6 Solar Solid fuel Buffer esc cscce5c cs vencescxenceesccenerescrene esceeneceseuenecesceesecese 196 23 04 Solar functo a e ae e E E 196 F000 2 Buffer tank TUN CUOM eters cce denSecniderSscndderSacn depSacnbtenSacniderSaccbeones 199 7 3 6 3 Solid fuel function neccncneeene knee neeeReReee ee 212 7 3 7 Tank loading switch over az es ceseceseceuccesecentcesecenecesecentceseceneresecestceseccue 213 7 3 8 Hydraulic buffer relief HBR ccxck cca ie Sect tecmtecesicoeueees 215 7 3 9 Easy enabling and disabling of a heating pump eeeeees 216 7 3 10 Other system comp
116. ched on while heating is disabled The set minimum and maximum limits are taken into account while heating When the heat generator is activated the set start up protection conditions of the heat generator are applied This can mean that the heating circuit pumps are switched off temporarily Frost protection function in case of heat generator fault If system malfunction message 30 3 or 31 3 occurs e g switch on failure of the burner s due to fuel shortage or burner malfunction priority pump switch off functions such as boiler start up protection DHW priority etc are disabled if frost protection is active The heating water circulated in the heating circuits adopts the overall mean room temperature and reduces or delays any freezing EN2H 0221GE51 R0808 SDC DHC Control Functions 6 8 9 Function See also EN2H 0221GE51 R0808 Pump forced operation With this function activated all the pumps are switched on every day for approx 20 seconds to protect against blocking owing to corrosion in case of long switch off periods gt 24 h and the mixed heating circuit is opened temporarily during this period 5 2 3 System Parameters menu Pg 72 127 Hydraulic Components SDC DHC 7 1 7 1 1 Function 128 Hydraulic Components Heat generator Boiler Heat generator start up protection The start up protection function prevents condensate building up when heating up while cold There a
117. connected in series with the burner phase and the boiler temperature is thus limited by this boiler temperature controller Otherwise there is the danger of boiler overheating 5 4 6 Heat generator menu HEAT GENER pg 99 Minimum burner runtime This function extends the burner runtimes and reduces the standby losses After starting the burner a minimum of the set time must elapse before the burner is deactivated again regardless of the temperature increase If the temperature in the heat generator exceeds the set heat generator maximum temperature limit the minimum burner run time is stopped and the burner is switched off in advance 5 4 6 Heat generator menu HEAT GENER pg 99 Switching Multi stage heat generator Switching differential The control unit offers independently adjustable switching differentials with reference to the same setpoint 131 Hydraulic Components SDC DHC Switching differential Switching differential II NOTE 132 Switching differential controls the heat generator capacity required according to load and demand by switching on and off the stage required for the actual heat demand within the set range Switching on and off is initiated symmetrically to the setpoint within half of the absolute value of the switching differential Switching differential II only two stage heat generator and heat generator 2 x single stage determines how many stages are required to meet the
118. cuit menu UNMIXED CIRC This menu contains all parameters required to program the un mixed heating circuits except the switching time programs Para Designation Setting range Setting values Factory Setting meter setting Heat Slope OFF 0 02 to 3 50 1 5 ing curve Re Reduced operation ECO Switch off operation ECO duced RED Lowering operation Heat Heating system UFH Under floor heating RAD ing RAD Radiator system CON Convector heater V 92 EN2H 0221GE51 R0808 SDC DHC Operation Para Designation Setting range Setting values Factory Setting meter setting 03 Room connection OFF Display of heat OFF in conjunction generator temperature with room sensor room sensor off operation active 1 Display of room temperature room sensor active operation active 2 Display of room temperature room sensor active operation disabled 3 Display of room temperature room sensor off operation active 04 Room factor OFF OFF 10 Influence active 500 RC Room controller active 07 Heating limit OFF 0 5 to 40 K OFF 08 Room frost 5 30 C 10 protection limit 09 Room thermostat OFF 0 5 to 5 K OFF function 10 Assignment of 0 Regulation to average 0 outside sensor value outside sensor 1 outside sensor 2 1 Regulation to outside sensor 1 2 Regulation to outside sensor 2 11 Constant 10 95 C 20 temperature setpoint EN2H 0221GE51 R0808
119. curs continuously based on the specified daytime hot water temperature The HEATING operating mode remains active until another operating mode is activated Activated continuous heating operation appears in the basic display with the information HEATING Continuous lowering operation The RED HEATING operating mode causes continuously reduced heating operation based on the specified lowered room temperature On the heating circuit levels the reduced operating mode ECO frost protected deactivation mode or RED lowering mode is set accordingly The minimum temperature limit of the respective heating circuit must be taken into account See the Direct Circuit or Mixed Heating Circuit 1 Mixed Heating Circuit 2 menu reduced parameter reduced operation and 12 parameter minimum temperature limit Hot water production occurs continuously based on the specified hot water economy temperature see DHW menu hot water parameter hot water at night EN2H 0221GE51 R0808 SDC DHC Operation NOTE Display Application NOTE Display 5 1 2 6 EN2H 0221GE51 R0808 The RED HEATING operating mode remains active until another operating mode is activated Activated continuous lowering operation appears in the basic display with the information RED HEATING In standby mode the entire system is switched off and protected from frost all frost protection functions active Hot water productio
120. d room sensor to 2 adaptation on If parameter 41 switch on optimisation is set to 1 parameters 42 min pre heating time and 43 max pre heating time are not required If parameter 41 switch on optimisation is set to 2 parameters 45 no room sensor and 46 pre heating time at 0 C are not required Parameter 41 switch on optimisation 03 adaptation restart If a controller is exchanged or structural changes are made e g improvement in insulation replacement of windows etc adaptation must be restarted Parameter 42 min pre heating time A pre heating time takes place before the set heating cycle e g 6 a m This is only possible with a room sensor Without a room sensor parameter 45 is active without a room sensor Parameter 43 max pre heating time This parameter setting limits the duration of pre heating which is set to 5 hours at the factory This is only possible with a room sensor Without a room sensor parameter 45 is active without a room sensor Parameter 44 min jump back temperature This parameter setting specifies the outside temperature up to which the adaptation works If this parameter is set to 5 C for example adaptation is active up to 5 C and deactivated starting with an outside temperature of 6 C Parameter 45 without room sensor The set room temperature is increased by a specific amount e g 1 C during switch on optimisation so that the heat generator gets a higher temperature setpoint and
121. d switching differential s External heat generator cut off If the assigned variable input is short circuited there will be a permanent deactivation of the heat generator It is cancelled again once the short circuit is remedied A ATTENTION This function is meant exclusively for external override signals and not for safety switch off Heat generator forced discharge When the temperature in the heat generator exceeds the set maximum temperature limit any excess energy is dissipated into circuits downstream This function applies to all controllers on the bus system OFF No heat dissipation Dissipation into hot water tank With provision tanks only A ATTENTION Thermal mixing valve at water heater outlet obligatory because of scalding hazard 141 Hydraulic Components SDC DHC 142 7 1 19 NOTE Function Discharge to heating circuits Any excess heat is dissipated into the heating circuits The set maximum temperature is not exceeded here The intended room temperature may be exceeded for short periods If the respective circuits are equipped with room stations the thermostat function should be activated ATTENTION For floor heating a contact thermostat must be installed to control forced switch off of the pumps Dissipation into buffer tank Any excess heat is dissipated into the buffer tank without exceeding the set maximum temperature Exhaust gas temperature monitoring Only if par
122. dings government schools public facilities etc where only the registration of the room temperature is required 169 Hydraulic Components SDC DHC 170 Room sensor off operation active Application See also 7 3 4 2 Function At this setting the room sensor is only used as a display device without influencing the room temperature related functions The operation of the wall device is possible without restrictions All system layouts that exclude room influence while the display of the actual room temperature is still required in contrast to setting OFF 5 4 4 Direct heating circuit menu UNMIXED CIRC Pg 92 Heating circuit room factor This function determines to what extent a deviation of the room temperature from the setpoint affects the control of boiler flow temperature If there is no difference between the desired TARGET and the current ACTUAL room temperature the direct heating circuit s flow temperature is controlled according to the set heating curve If there is a difference between the room temperature and the setpoint the heating curve is shifted parallel to the room temperature axis so that the deviation is compensated The amount of the displacement depends on the setting of the room factor The following relation applies Deviation x Room factor 100 Corrected room setpoint Set room setpoint Example set room setpoint 21 C actual room temperature 20 C Deviat
123. draulic Components NOTE Base load offset Heat generator reset EN2H 0221GE51 R0808 fulfilled Only when the outside temperature drops to the outside temperature disable level minus 2 K is the heat generator enabled again If several heat generators are controlled though one device condensing burners 2 stage burners all stages of the device will be disabled If a fault occurs at a heat generator all outside temperature disables in the system are cancelled This setting becomes effective only if several heat generators are operated in cascade mode Burner stages operating as base load are given a higher setpoint temperature than the modulating stage which is switched on last This higher value is composed of the current setpoint temperature plus the set base load offset If several heat generators are switched though one control device the setting applies to every heat generator With 2 stage heat generators the counters for operating hours and burner starts see Parameter settings 5 4 pg 81 can be reset separately for stage 1 ST 1 and stage 2 ST 2 Resetting With the reset indicator flashing RESET the reset ready indicator SET will flash when the input button is pressed briefly A reset will be performed when the input button is pressed for approx 5 seconds After the parameter values are reset a return to the first parameter in the Heat Generator menu occurs 135 Hydraulic Components SDC
124. e esr RSC RS System Flue gas Overshoot 33 5 temperature System Flue gas STL triggered 33 8 temperature logical _ Boiler temperature Not reached logical Tank temperature Not reached logical MC1 flow Not reached 52 4 temperature logical MC2 flow Not reached temperature logical Room temperature Not reached HC logical MC1 room Not reached temperature logical MC2 room Not reached temperature System Address Address collision System Pulse input fault No signal Fault message if no signal after 5 minutes EN2H 0221GE51 R0808 245 53 4 54 4 55 4 56 4 70 0 Hydraulic Components SDC DHC Fault messages Fault status Fault type Fault object Remark code Fault message log The control device has a fault message log in which a maximum of five fault messages can be saved The fault messages are displayed with the date time and fault type fault number the query is carried out in the sequence of the entered fault messages in the Fault Message menu The last most recent fault message is in first position No 01 the previous fault messages are shifted down by a position upon each new fault message The fifth fault message is deleted when a new fault message appears If a heat generator defect occurs fault message 30 1 or 31 3 and system frost protection is active at the same time boiler start up protection is switched off and thus the heating circuit pumps are started to minimise the
125. e actual control path is dependent on this In historic buildings churches galleries it is important that heating up and cooling down are damped via a room setpoint value ramp so that masonry and artwork are not damaged The function starts with the switching times switch on switch off point and the control mode change This function helps prevent jumps in temperature For this reason e The ramp is recalculated starting from the actual room temperature after a power failure A setpoint jump does not occur e If anew setpoint jump setpoint increased lowering initiated occurs before the room setpoint temperature is reached the new ramp is recalculated starting with the current actual room temperature e An activated ramp takes affect in all control modes Heating limit function This parameter supplements the summer switch off function It deactivates the respective heating circuit as soon as the computed flow temperature setpoint approaches the current room temperature setpoint The heating limit parameter can be activated separately for each heating circuit Switch off Flow setpoint lt current room setpoint heating limit setting 175 Hydraulic Components SDC DHC Boundary conditions 176 Switch on Flow setpoint lt current room setpoint heating limit setting 2 K Example Room setpoint 22 C heating limit setting 2 K Switch off at flow setpoint 24 C 22 C 2 K Switch on at f
126. e at a variable input e Heat generator cycle disable is active via configuration in the Solid Fuel menu parameter 05 e Heat generator cycle disable is active via configuration in the Solar menu parameter 07 e A heat generator is not present in the system e g purely solid fuel buffer combinations Discharge control 1 The heating circuits are supplied with energy either from the buffer through discharging the buffer tank via buffer loading pump provided the buffer tank contains sufficient energy or through direct supply from the heat generator If a heat generator disable is active e g through external burner disabling via contact cycle disable solid fuel solar the energy contained in the buffer independent of the current buffer level is dissipated into the heating circuits by enabling the buffer discharge channel e g switching on the buffer loading pump or switching over the buffer loading pump valve The buffer minimum temperature is monitored Hot water loading is enabled under the conditions of buffer tank discharge protection 207 Hydraulic Components SDC DHC NOTE Buffer setpoint temperature Buffer minimum temperature limit Buffer tank maximum 208 temperature limit Discharge control 2 The heating circuits are always supplied with energy from the heat generator As long as the buffer contains sufficient energy the heat generator will be heated via the buffer loading pump instead
127. e boiler setpoint is transmitted from the SDC controller to the automatic stokers via OpenTherm and feedback of the boiler actual value occurs from the automatic stokers in addition to the hot water actual and outside temperature and fault messages if appropriate Setting in the Heat Generator menu parameter 1 setting 5 automatically detected when a heat exchanger bus OpenTherm is connected AUTOSET however If the OpenTherm function is active the boiler minimum limit is automatically set to 5 C To use the OpenTherm function the boiler must have an OpenTherm logo i OpenTherm 2 wire connection ST lal ar aa a Automatic stoker Terminals 37 38 on SDC EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 1 16 Function 7 1 17 Function 7 1 18 Function Set values EN2H 0221GE51 R0808 Use of boiler sensor 2 Two single stage heat generators For sensing of the temperature in the second heat generator with double boilers or two single stage heat generators see Heat Generator menu parameter 1 boiler type 3 Two measuring points in the combustion chamber In order to reduce standby losses by increasing the burner runtimes With automatic sensor switching between boiler sensor 1 and 2 after the burner switching cycle the On signal for the burner will be determined by the upper sensor BS1 and the Off signal by the lower sensor BS2 based on the specified demand value an
128. e corresponding inputs and outputs are assigned automatically according to the hydraulic diagram and can be altered if necessary The associated system schematics are available in the hydraulic schemes collection 5 4 Parameter settings Pg 81 The variable inputs and outputs of device series SDC DHC 43 The selected functions can be assigned only once and are then no longer callable in other variable inputs If an input function is absolutely necessary for a corresponding output function with regard to the variable outputs no selection is possible 119 Control Functions SDC DHC 120 6 8 6 8 1 6 8 1 1 Function Light construction Medium construction Heavy construction See also General functions and their operation Outside temperature sensing Building type This parameter takes into account the relevant building type by means of various calculation methods for the determination of the outside temperature mean value according to the setting The mean value is obtained over a period of 2 hours Application Wooden houses lightweight brick buildings The mean value is obtained over a period of 8 hours Application Medium weight masonry in hollow blocks or bricks The mean value is obtained over a period of 24 hours Application Heavy masonry in tuff or natural stone 5 4 4 Direct heating circuit menu UNMIXED CIRC Pg 92 and 5 2 5 Direct Heating Circuit Mixed Heating Circuit 1 Mixed
129. e exceeds the set value by 1 K The summer deactivation function is undone e Incase of an outside sensor defect e Incase frost protection is active During deactivation phases standby mode manual summer operation summer deactivation lasting longer than 24 hours all pumps are switched on for approx 20 s and the mixers are temporarily opened during this time to protect against blocking by corrosion In connection with a second outside sensor the current averaged outside temperature is accepted for summer deactivation if the average value of both sensors is specified during outside sensor assignment Active summer deactivation is represented by a beach umbrella symbol in the basic display Only active in the AUTOMATIC operating mode 20 C OFF set value of system frost protection to 40 C Parameter reset With the reset parameter it is possible to reset any inadvertently made changes in the parameter menu to the factory setting EN2H 0221GE51 R0808 SDC DHC Operation Setting 5 2 3 5 EN2H 0221GE51 R0808 A ATTENTION A reset should only be carried out if all individually entered values are to be replaced by the values specified at the factory gt When the PARAM RESET display flashes press the input button SET flashes in the display gt Press and hold the input button for 5 s If a reset is carried out the RESET OK confirmation appears briefly Verification is then started w
130. ears in the display Press input button HOLIDAY 01 appears in the display Press input button The year flashes in the display gt Set year with the input button gt Press input button The day on which the holiday is to begin flashes in the display gt Set the day the holiday will begin with the input button gt Press input button TIL appears in the display Set the day you will return from holiday with the input button Press input button The desired holiday timeframe is saved You can now enter additional holiday timeframes up to 15 holiday blocks Longer absence while heating operation is active EN2H 0221GE51 R0808 SDC DHC Operation Control during holidays Cancellation Factory setting Setting range Display 5 1 2 7 Ci Exceptions NOTE EN2H 0221GE51 R0808 At outside temperatures below the frost protection limit see 5 2 3 System Parameters menu pg 72 the heating circuits are controlled as follows e Without wall devices Based on a lowered room temperature specification of 3 C e With wall devices Based on the room frost protection limit of the respective heating circuit of 10 C see Direct Heating Circuit or Mixed Heating Circuit 1 Mixed heating circuit 2 menu parameter 08 room frost protection limit An active holiday program can be cancelled in case of early return gt Press and hold the butt
131. eating circuit name 180 Heating circuit pump extended running time 165 Heating circuits minimum temperature limit 130 Heating curve 161 162 Heating limit 175 Heating system 164 Hot water Circuit switching differential 191 Control mode 154 189 Maximum temperature 188 Night time temperature 188 Pre control 151 Pre regulator 150 Quick connection in cascaded systems 192 Hot water Control 152 Production 187 Hot water loading mode stage II 134 Hot water tank Loading 187 Hydraulic buffer relief 215 Indirect return increase 161 222 256 L Legionella protection 188 Loading enabling 191 Loading pump extended running 191 M Menu Direct Heating Circuit 172 180 Mixed Heating Circuit 180 Mixed Heating Circuits 172 Minimum burner runtime 131 O OpenTherm 140 Operating mode 118 Operating states 40 Operation with NTC 20K room temperature sensor 231 Outside temperature 121 122 135 Outside temperature emergency operation value 121 Outside temperature sensing 120 Overview of the technician parameters 81 119 135 P Parallel operation 155 189 Parallel operation based on weather conditions 190 Primary pump 158 Extended running time 158 Priority isolating circuit 190 Priority mode 189 Pump forced operation 127 R Reduced operation 164 Relay function test 239 Reset 77 249 Return increase 159 EN2H 0221GE51 R0808 SDC DHC Index Return interval 156 Return temperat
132. eeeeeeeeseeeeeeeeeeees 111 5 4 16 Error messages menu ALARM eee eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 112 5 4 17 Error messages 2 menu ALARM 2 eee eee e eee 113 5 4 18 Sensor calibration menu SENSOR ADJ eesse 113 6 Control Functions ssc 114 6 1 Variable adjustment of the hydraulic parameters variable inputs and UPU en dan Saat od a Ton de ea nt ad Ss E A A EER 114 6 1 1 Connection and settings table 0 00002 0 2c ccee eee eeeeeeeeeeeeeeeeeeeeeeeeeeees 116 6 2 Switching time program enabling 2 2 c2 eceeeceeeeeeeceeenececeeecece cece 117 6 3 Suppressing the cycle temperature on time program level c00e 118 6 4 Enabling Separate Control Mode cc cccecececneceneeeneeeeeeeneceeeeeneeeeeeeteeeeeeetee 118 6 5 Switching from SDC to DHC oivecc2 occ ede ste ade seteardesateardecntearducateasducaterdesetesds 119 6 6 Selection of hydraulic parameter presettingS 0 0 0 0 cece eeeeeeeeeeeeeeeeeeeeeeeeeeeeee 119 6 7 The variable inputs and outputs of device series SDC DHC 43 08 119 6 8 General functions and their Operation ccccecceceeeeeeeeeeeeeeeeeeeaaeeeeeeeeeees 120 6 8 1 Outside temperature SENSING cece eee eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 120 6 8 1 1 Building type e 20 nt cee oe eee Sh Rete Riche lectates 120 6 8 2 Heating circuit outside temperature assignment ceeeeeeeees 121 6 8
133. eir setpoint to the respective maximum temperature A ATTENTION There is a danger of scalding by hot water as the hot water temperature can exceed the set setpoint temperature Emission measurement by the chimney sweep Emission measurement can be cancelled at any time with the or button 45 Operation SDC DHC 46 5 1 2 9 Access to the technician OEM area Entering a technician or OEM code enables additional setting options in the parameter menu The technician code is leat For access to the OEM area please ask your field service contact partner Procedure gt Press the D and E buttons simultaneously The first number of the 4 digit code flashes gt Set the first code number by turning the input button gt Press the input button The second number flashes gt Enter all remaining code numbers as described in Steps 2 and 3 After entering the last code number the controller is enabled for the respective area technician or OEM gt Press and hold the rotary button longer than 3 seconds You reach the menu selection level and can enter modify parameters Pressing the Gi button jumps back to the previous selection Pressing the Gl button pressing and holding the input button longer than 3 seconds or waiting until the set info time expires Causes a jump back to the basic display EN2H 0221GE51 R0808 SDC DHC Operation Setting Setting range E
134. er heating circuits except for the direct heating circuit at addr 10 are disabled Frost protection monitoring for example does not occur for these heating circuits during this time The screed function is used exclusively for the required drying of newly applied screed on floor heating systems The process is based on recommendations of the German Bundesverbandes Flachenheizungen Federal Association for Surface Heating concerning the heating of fresh floor covers heating according to a mandatory temperature profile This is a special function that is not interrupted by any other control mode including manual operation or emission measurement The screed function can be activated for mixed heating circuits and in special cases e g in conjunction with a condensing boiler also for a direct heating circuit When the screed function is active all weather dependent control functions of the heating circuit concerned are switched off The respective heating circuit operates independent of the control mode switching times as a constant temperature controller An active screed function can be deactivated at any time parameter screed function OFF On completion of the screed function the heating circuit returns to operation according the current control mode setting The screed function consists of two steps EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Step 1 Step 2 Example EN2H 0221GE51 R0808 Fu
135. es In cascade mode this setting would be superseded by the cascade setting and is therefore not available The parameter Enabling mode full load stage allows changing the effect of a time delay stage II setting during the start up phase below the heat generator minimum temperature limit Unlimited enable during start up relief Both stages are in unlimited operating during start up Time out during start up relief Stage Il is switched on after the set time delay acc to time delay stage Il In cascade mode this setting would be superseded by the cascade setting and is therefore not available The function hot water loading mode stage 1 2 allows defining of the loading mode for the hot water heater with 2 stage or 2 x single stage heat generators The following options are available e 2 stage hot water circuit loading with delayed enabling of stage Il acc to time delay stage II e Unlimited 2 stage hot water circuit loading e Hot water loading with stage only stage II disabled In cascade mode this setting would be superseded by the cascade setting and is therefore not available 5 4 6 Heat generator menu HEAT GENER pg 99 When the actual outside temperature exceeds the set limit all demand on the heat generator is disabled within a device The heating circuits continue operating but the heat generator will not be switched on The preset minimum burner running times are EN2H 0221GE51 R0808 SDC DHC Hy
136. esH apising HEIs 4 UoReINPOW wes jo uogenpon Jo uopejnpon Jo uopejnpon Jo uoneinpoyy P Is nO PNO 6u e y p x u dwe pow ON Joye uogouny uosod ANTES Hate ZIL N19 Jo ainyesadw a julodjes wooy 104 u09 Aepioy He a 9 101 U09 WOOY pu Joyenjoy B SAY Merl Buyeey Pex dwei pow A A Joye 403119 julodjas wooy l0 uo9 epijoH 1103 Y 2o jo uoo wooy Buyeey z2 11Q 1942M JOH TOSUSS piSMO nou uoljesedo OLY d 6 d Kouabiawe z Aiowew yne Senta Aad ceed yoojo awiy jeer Jeyowesed wayshs uo YoyIMs Buljoo9 40 apoo Buly907 JO NNO y Jo u w snfpy uogeanByuog soinespAY ajeq Burwwesbolg ez gz lz 9 sz vz ez zz LZ oz SEA 51 EN2H 0221GE51 R0808 SDC DHC Operation uoljeiqijes 1osues zI sebessow yjne4 3s9 Aejay suolouny 39S snq eq Buipesseg 101 U09 MOJ 1 0 L sayng 12ny pos ejos se ldul uInzJ y Buryeay 79144381A s1 UNO09 Jnoy Buyesedo pue dn ye s Jouing 1 obeys jo Buijosoy jqes p snyes dw p s no s Au pow 43 uno9 Jewing Aoede 19 emMm OH pul Ayoedeo Buyeoy 104 u09 peol In4 pwll wnwxew W340 Joyesaueb yeay pesids jo1 u09 1d NIJ 19 2M JOH ZIL WNDAID Buyjeey poxiw n3119 Buneay 11q 19 eM JOH sy ed jo1 u09 syn 119 Bue y uoneinByuog yesal JIJ WELJE d OHd Ods dJayawesed waysks uonoaj S uoneinByuog soinespAY ajeqg
137. extracted in the occupied room e g thermostat valve closed If the return temperature exceeds the set maximum value the mixed heating circuit valve is adjusted to this maximum temperature The flow temperature then remains ignored Mixed heating circuit control Proportional part Xp The proportional band Xp defines how a step change of the setpoint effects a change of the corresponding actuator according to the selected setting Example Consider an actuator moving though an angle of 90 C in an action time of two minutes When a sudden flow temperature control deviation of 10 K occurs e g when the system switches from reduced to daytime operation and the P part setting is 5 K the actuator has to open by 50 5 K x 10 K Consequently the duration of the actuation pulse is one minute 50 of the actuator runtime EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 4 10 1 2 Integral action time Tn The integral part adjustment time determines the dynamic behaviour of the controller and thus the time required by the controller to adjust for the actual control deviation The adjustment time is independent of the amount of deviation Example With a sudden flow temperature control deviation of 10 K e g when the system switches from reduced to daytime operation and an l part setting of 7 minutes the controller will adjust for the new 10 K higher flow temperature after the set time NOTE The adjustment
138. f higher priority System information An open demand contact is signaled by the string disable in the status display a closed contact is identified by the string demand A variable input that has been defined as a demand contact acts on the heating circuit in the following way e Variable input open No demand The heating circuit is switched of unconditionally no frost protection no standby function e Variable input short circuited Demand The heating circuit is in control mode HEATING continuous heating and works according to its parameter settings ATTENTION Customers must take appropriate frost protection measures for the respective control circuit This function can be activated up to three times once for each available variable input EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 11 7 3 11 1 Function NOTE EN2H 0221GE51 R0808 Bus communication Bus address of central device Control devices SDC and DHC 43 can be connected via a data bus This makes it possible e to control additional heating circuits by adding up to four additional central devices e to connect wall devices to the central devices and assign heating circuits e to cascade multiple heat generators with one built in central device each The following figure shows the maximum possible expansion stage of the bus system a E 5 7 pH A H mm oj jo oj jo
139. f peak load boilers take over the base load upon demand and the base load boilers take over adjustment of the flow temperature Further switching of stages is still only active for the actual base load boilers Special function characteristics The heating circuits of the control device in which manual operation was activated operate according to the manual function The set demand value is forwarded to the energy management module of cascade control and adjusted to by the available boiler stages This function works as described under Emission measurement with the following extensions e The effect on heating circuits is extended to all heating circuits of the system e Enabling of the heat generators burner is initiated at the same devices where emission measurement was activated EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Safety temperature limiter Emergency mode Data transmission 7 3 13 7 3 13 1 Function Automatic call up EN2H 0221GE51 R0808 This function works as described under Safety temperature limiter check with the following extension As soon as a Safety temperature limiter function is detected within the BUS system all consumers heating circuits are disabled Configuration of cascade control occurs in the central device with the bus address 10 If that controller becomes unavailable due to some defect the remaining stages continue operating in an emergency mode In this m
140. for the solid fuel buffer sensor optional The connection occurs to variable input 1 variable input 3 depending on the assignment to an available variable input e If no solid fuel buffer sensor is connected the collector tank buffer sensor value dedicated sensor input is accepted as the buffer sensor In this way the collector tank buffer sensor input can be used as a sensor input for several uncontrolled heat generators e g solar or solid fuel A ATTENTION Note the sensor position and stratification conditions A forced switch on will be initiated for the solid fuel loading pump if a solid fuel boiler sensor is defective The solid fuel function allows the integration of solid fuel boilers usually in combination with a buffer tank into the system to support heating Under this function the solid fuel loading pump can be controlled through various switching conditions as described in the following If the temperature in the solid fuel boiler rises 10 K above the set value the solid fuel loading pump is enabled If the temperature in the solid fuel boiler undershoots the minimum boiler temperature the solid fuel loading pump is switched off and loading is interrupted EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Solid fuel boiler maximum temperature limit Solid fuel boiler buffer tank switch on differential switching differential ON Solid fuel boiler buffer tank switch off differential swi
141. g pump switches off immediately In this case it cannot be ensured that the set extended running time is adhered to If a hot water circuit thermostat is used instead of an electronic sensor the hot water maximum temperature setting plus the specified temperature shift during loading is forwarded to the heat generator With this function it is set how the rest of the heating system reacts to heat demand from the hot water tank There are 5 different setting options Parallel operation During hot water circuit loading the heating circuits remain operative Priority mode During hot water loading the heating circuits are put out of operation They are restarted as soon as the hot water circuit loading pump extended running time is over If the hot water setpoint temperature is not reached after 4 hours a fault message is indicated on the display Conditional priority If the temperature of the heat generator has exceeded the loading temperature for the hot water tank mixed heating circuits are enabled Non mixed heating circuits DHCP remain disabled during hot water circuit loading The heating circuits are enabled according to the following criteria Enabling the heating circuits Heat generator actual temperature gt hot water setpoint temperature hot water switching differential 2 10 K Disabling the heating circuits Heat generator actual temperature lt hot water setpoint temperature hot water switching different
142. he Timeprograms menu see 5 2 2 Timeprograms menu pg 55 Default programs P2 and P3 cannot be selected until the PROGRAM P1 to P3 parameter is enabled in the System Parameters menu Without enabling only program P1 is active See 5 1 2 5 Operating mode button basic display pg 26 EN2H 0221GE51 R0808 SDC DHC Operation Display 5 1 2 5 4 Setting EN2H 0221GE51 R0808 Disabling enabling default program P2 to P3 Disabling System Parameters menu program parameter P1 All heating circuits and the hot water circuit solely refer to the default individually programmed switching times in the program P1 parameter Program P1 does not appear in the display in this operating mode see 5 2 2 Timeprograms menu pg 55 and 5 2 3 2 Time program pg 73 Enabling System Parameters menu program parameter P1 to P3 see 5 2 2 Timeprograms menu pg 55 and 5 2 3 2 Time program pg 73 An active automatic program appears in the basic display with the current date and time If default programs P2 and P3 were enabled the corresponding symbol LOll or MI is also displayed depending on the selected program The symbols are only displayed with the time program P1 to P3 active Manual summer operation excluding heating operation With manual summer operation only the hot water circuit remains operation and controls the heat generator temperature
143. he switching conditions of the timer ECO lowering phase the output switches OFF even if the switching conditions are present otherwise Heating circuit correction For cooling operation the mixed heating circuit corrects to the setpoint temperature at the flow sensor see the Heating Circuit menu heating circuit cooling setpoint temperature parameter and functions as a heating controller EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Humidistatic switch off To prevent excessive humidity build up in the room a humidistat can be connected to a variable input Cooling without humidistatic switch off MC1 Cooling para 28 on cooling off temp System para 25 switch on temp MC2 Cooling para 28 on cooling off temp Cooling with humidistatic switch off MC1 Output para 28 DCP or System cooling temp Cooling VO1 or para 25 Sn off VO2 switch on temp MC2 25 para 28 cooling temp NOTE Ifthe set humidity is exceeded a short circuit results A triggered humidistat interrupts cooling mode Active cooling does not affect the heat generator Demand from other heating circuits for the heating generator or hot water loading is served in parallel EN2H 0221GE51 R0808 179 Hydraulic Components SDC DHC 7 3 4 9 Access code Factory setting Setting range Function 180 gt Ensure that the cooling circuits to be cooled are decoupled
144. he table below for detailed correlations Control mode 5 Loading control with hot water switch over valve System hydraulics F SLP PLP a Heat generator b Buffer tank EN2H 0221GE51 R0808 203 Hydraulic Components SDC DHC 204 Heating circuit controls send their demand value to buffer control Hot water and buffer controls demand energy from the heat generator when required The buffer loading pump output is ON during buffer discharge and hot water loading Any active hot water priority is not effective here Control mode 6 Discharge control to heat generator System hydraulics a Buffer tank c Hot water tank b Heat generator This hydraulic layout is used when an alternative energy buffer tank is added to an existing system In such systems it is often the case that there are existing unit boilers with integrated hot water circuit loading tank and hot water loading in the boiler All heat demand is forwarded to the heat generator When the buffer tank can cover the energy demand the heat generator nominal temperature is maintained by the buffer via buffer loading pump instead of the burner In this way the heat generator always operates at its setpoint temperature and cannot be exposed to excessive buffer temperatures EN2H 0221GE51 R0808 SDC DHC Hydraulic Components See the table below for detailed co
145. hing time programs for program selection and for individualised switching time programming In the state of delivery only one switching time program is enabled This achieves simplification of operation with a large portion of applications for which only one switching time program is used Set values p1 Program 1 enabled programs 2 and 3 disabled P1toP3 All three programs enabled Factory setting P1 Effects In contrast to the previous description the following setting options are available when programs P1 to P3 are enabled e Operating mode selection In the AUTOMATIC and SUMMER operating modes switching time program P1 P2 or P3 can be selected e Switching time programming With switching time pro gramming the three switching time programs P1 to P3 can be selected for each heating circuit 5 2 3 2 1 Control mode selection In the AUTOMATIC and SUMMER control modes switching time program P1 P2 or P3 can be selected 5 2 3 2 2 Switching time programming With switching time programming the three switching time programs P1 P3 can be selected EN2H 0221GE51 R0808 73 Operation SDC DHC 5 2 3 3 Setting range Set values Factory setting 5 2 3 3 1 Setting Setting range Factory setting 74 Operating mode Two operating modes can be selected They determine whether the operating mode the daytime temperature and the night time temperature apply for all heating circuits or
146. hours 16 00 hours 50 C 16 00 hours 22 00 hours 60 C Example After Daytime hot water temperature value 52 C Temperatures in switching time program 05 00 hours 08 00 hours 62 C 08 00 hours 16 00 hours 52 C 16 00 hours 22 00 hours 62 C Changed settings are stored when key or is briefly pressed again or after automatic return at a preset time Once the settings are stored the unit automatically switches to the basic display 5 1 2 4 Daytime hot water temperature button pg 25 187 Hyd raulic Components SDC DHC Hot water circuit night 188 time Legionella protection Temperature measurement NOTE Maximum hot water temperature Hot water economy temperature is the setpoint for the hot water tank between the active operating mode times in automatic mode If a hot water thermostat is used to determine the water heater temperature the parameter for the setting of the economy temperature is skipped In order to kill Legionella germs in the tank a Legionella protection function can be activated Activation is carried out in the Hot Water menu parameter 2 To ensure full destruction of germs the set value of the Legionella protection temperature must be at least 65 C The setting is carried out with two parameters The weekday for Legionella protection can be selected by the user with a freely accessible parameter With parameters 03 and 04 the time and
147. hydraulically from the actual heating system during active cooling e Configured cooling is only active in automatic mode e When setting ECO mode cooling does not take place during a lowering phase e With the lowering mode setting cooling is carried out at the same cooling temperature continuous cooling e Cooling mode is not active in any other control modes HEATING RED HEATING STANDBY PARTY TIL ABSENT TIL HOLIDAY TIL Heating circuit name No access restriction empty 00000 ZZZZZ The max three heating circuits available in a controller are provided with the short names DC direct heating circuit MC1 mixed heating circuit 1 and MC2 mixed heating circuit 2 The heating circuits are given unique names here To enable easy assignment of the heating circuits to the living area by the end customer a unique 5 digit short name can be assigned to each of the three heating circuits With the empty setting a unique name is not assigned The default short name appears gt Set the flashing position with the input button gt Confirm by pressing the input button gt The remaining positions are set in the same way EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 4 10 Function NOTE See also EN2H 0221GE51 R0808 The display of the unique heating circuit name appears e inthe menu selection e inthe parameter tree e onthe information level Room thermostat function max
148. ial 2 5 K 189 Hydraulic Components SDC DHC 190 NOTE NOTE In this control mode the loading temperature offset for the tank is to be selected so that the heat generator does not switch off before the heating circuits are enabled A parallel shift of at least 10 K should be set so that this function can operate correctly Parallel operation based on weather conditions Above the set outside frost protection limit hot water provision is carried out in priority mode in case of active frost protection there is a switch over to parallel mode Priority mode with intermediate heating With this setting hot water circuit loading is limited to a maximum of 20 minutes in order to provide for a 10 minute long intermediate heating The loading procedure is continued at the end of the intermediate heating Hot water loading and intermediate heating are carried out in an alternating order until hot water tank loading is finished Priority isolating circuit Hot water loading is carried by means of a three way switch over valve the heating circuit pump is also the hot water circuit loading pump At the end of the hot water loading and at the expiration of the extended time the three way switch over valve is changed back to heating mode The heating circuit pump is connected at output direct heating circuit pump and the three way valve to output tank loading pump in this case If there is no hot water demand standby the va
149. ignment Parameter settings Hydraulics menu HYDRAULIC The parameters in this menu refer to the general system hydraulics and the functions and configuration of the programmable inputs and outputs for the respective system components Representative of many individual settings the applications are only defined by the 1st parameter of this setting table Example The controller is to cover system No 0202 Provided that the controller features enough relays parameter 01 must be set to value 0202 Para Designation Setting range Setting values Factory Setting meter setting 01 Hydraulic 0 0101 0102 n 0 schematic 02 Hot water charging OFF No function 1 pump output 1 Hot water charging pump 4 Circulating pump 5 Electric heating rod EN2H 0221GE51 R0808 81 Operation SDC DHC Para Designation Setting range Setting values Factory Setting meter setting 03 Mixed heating OFF No function 3 circuit 1 output 2 Direct heating circuit controlled by weather conditions 3 Mixed heating circuit controlled by weather conditions Constant regulator Fixed value regulator Return maintenance 30 Mixed heating circuit as continuous hot water pre regulator district heating 39 Hot water pre regulator district heating 04 Mixed heating For setting values see parameter 3 circuit 2 output 03 05 Direct heating OFF No function 2 circuit pump output 2 Direct heating c
150. imum room temperature limit This function determines a room temperature related limit with adjustable switching differential If the room temperature of the relevant heating circuit exceeds the current daytime or reduced room setpoint by the set switching differential heating is temporarily stopped heating circuit pump switched off Heating is resumed as soon as the room temperature of the respective heating circuit drops 0 5 K below the switch off temperature Example Daytime room setpoint 22 C Thermostat function set value 4 K Interruption of heating TRoom gt 22 C 4 K gt 26 0 C Resumption of heating TRoom gt 26 C 0 5 K lt 25 5 C Set value OFF disables the thermostat function The thermostat function is effective while heating and in reduced mode The thermostat function is disabled when outside temperature frost protection is active 5 4 4 Direct heating circuit menu UNMIXED CIRC Pg 92 181 Hydraulic Components SDC DHC Return limit 7 3 4 10 1 7 3 4 10 1 1 182 Special mixing circuit functions district heating control devices only By setting an additional return sensor in the mixed heating circuit the return temperature can be limited using this function This is a maximum temperature limit With some applications an excessively high return temperature causes problems e g district heating or condensing applications They can occur if heat is not being
151. in the control network A primary pump connected to an extension controller address 20 30 50 runs only upon a demand from the heating circuits associated with the respective control device To avoid a high temperature safety switch off of the heat generator the primary pump is switched off according to the set time delay when a request to the heat generator is withdrawn Boiler circuit pump This function is only active if the BOILER CIRCUIT PUMP 1 function was assigned to one of the outputs i e direct heating circuit pump variable output 1 or variable output 2 in the Hydraulics menu This function is mainly used with multi boiler systems with thermohydraulic distributors and is used for water side cut off of a heat generator not in use The variable output controls a boiler circuit pump with a non return valve with a faulty spring or a motorised shut off device The function becomes active immediately upon demand for the heat exchanger The heat exchanger is not enabled until the set pre running time expires Once the heat generator switches off the variable output remains active for the duration of the set extended running time For systems with two individual boilers or a double boiler two boiler circuit pumps can be connected The second output then controls the boiler circuit pump of the downstream boiler EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Boiler circuit pump pre running time Boiler c
152. ing and zeroing Local regulations on the connection of equipment must be observed Hot water temperature greater than 60 C A ATTENTION Note that there is a danger of scalding at all hot water draw off points kitchen bathroom etc in the following cases Add sufficient cold water in these cases When the automatic anti legionella mechanism is activated the hot water is automatically heated to the anti legionella temperature 65 C at the factory on the selected day and at the selected time to kill any legionella bacteria found in the hot water tank In the manual mode emission measurement operating mode the hot water is heated up to the highest possible boiler temperature as the burner and all pumps are switched on and the mixer is opened fully There is an acute danger of scalding at all connected hot water draw off points Add sufficient cold water or switch off the hot water loading pump at the switch of the pump if present Heating and hot water are in unregulated continuous operation This operating mode is for special use by the chimney sweep for emission measurement or if the controller is defective The high hot water temperatures can be prevented however by setting the boiler thermostat to a max boiler temperature of approx 60 C Safety instructions SDC DHC 2 4 Connection of accessory parts 2 5 WARNING According to VDE 0730 a separator for each mains terminal is to be provided in the
153. ing point of the flexible district heating return temperature limitation code 09 can be set for the operation with heating circuits The flexible return temperature limitation can be switched off by selecting 10 C as the starting point 40 C is set as the bottom return setpoint for the flexible return temperature limit If the maximum limit is exceeded a second PI controller intervenes with the same parameters as in the secondary control heating temperature control Return temperature limit Starting point of the flexible return temperature limitation Example 1 90 C 10 C Factory setting Example 2 50 C 10 C Fixed value limit Example 3 80 C 5 C Example 4 50 C 10 C EN2H 0221GE51 R0808 SDC DHC EN2H 0221GE51 R0808 Hydraulic Components Besides return temperature limitation either volume flow limit or thermal output limit can also be set for this controller The selection of these functions is described below in parameter 11 Para meter Designation Range Pre setting Step Unit 08 Max return setpoint 0 100 90 0 5 C 09 Starting point of the flexible district heating return temperature Off 40 10 Off 0 5 C 11 Return limit 0 Temperature 1 Volume flow and temperature 2 Heat output and temperature 0 1 2 Return temperature limit for hot water loading In the
154. ion 1 K For a room influence of 100 1K x 100 Corrected room setpoint 21 C 100 22 C The boiler temperature is controlled according to a heating curve which corresponds to a room temperature setpoint of 22 C EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 4 3 7 3 4 4 Function EN2H 0221GE51 R0808 High settings lead to a quicker adjustment of the control deviation while they reduce the stability of the control circuit and can lead with excessively high setpoints to the oscillating of the control variable room temperature Heating circuit room controller With this setting the heating circuit concerned can be controlled through a room controller This requires a wall device SDW 30 with room control function The room controller directly determines the required flow setpoint and transmits this information to the central device With this setting the control of the respective heating circuit is completely room guided Weather condition control is inactive However the parameters for weather response heating curve setting can still be entered Switch on switch off optimisation The switch on optimisation leads to the set day setpoint being reached at the beginning of the set time period of the heating cycle e g 6 a m to 10 p m at 6 a m Without switch on optimisation the heat generator would not be started until 6 a m The desired day setpoint is not reached until some time l
155. ion Setting range Setting values Factory Setting meter setting Time Time program P1 Only one switching time P1 program program enabled P1to Three switching time P3 programs enabled Operat Operating mode 1 Common adjustment for 1 ing all heating circuits mode 2 Separate adjustment for the individual heating circuits Summe Summer switch OFF setting value of parameter 20 r off 05 to 30 C 05 System frost pro OFF 20 C to Setting value of 3 tection summer parameter 06 Request contact 1 Direct heating circuit 1 module 2 Mixed heating circuit 1 for variable a 3 Mixed heating circuit 2 input 1 4 Hot water circuit ALL All controllers 07 Request contact For setting values see parameter 1 module 06 for variable input 2 08 Request contact For setting values see parameter 1 module 06 for variable input 3 09 Climate zone 50 0 C 12 10 Building type 1 Light construction 2 2 Medium construction 3 Heavy construction 86 EN2H 0221GE51 R0808 SDC DHC Operation Para Designation Setting range Setting values Factory Setting meter setting 11 Automatic exit OFF No automatic exit 2 time 0 5 Automatic jump back to 5min the basic display occurs after the set time 12 Anti blocking ON Anti blocking protection ON protection active OFF Anti blocking protection not active 13 Logical fault OFF ON OFF messages 14 Automatic set OFF ON OFF f
156. ircuit pump 4 Circulating pump 5 Electric heating element 6 Constant regulation 10 Feeder pump 11 Boiler circuit pump 1 12 Boiler circuit pump 2 13 Group alarm 14 Time switch 15 Solar charging pump 25 Cooling switchover 27 Hydraulic buffer relief 82 EN2H 0221GE51 R0808 SDC DHC Operation Para Designation Setting range Setting values Factory Setting meter setting 06 Variable output 1 OFF No function OFF 4 Circulating pump 5 Electrical heating circuit 9 Bypass pump 10 Feeder pump 11 Boiler circuit pump 1 12 Boiler circuit pump 2 13 Group error message 15 Solar charging pump 16 Buffer charging pump 17 Solid fuel charging pump 18 Stratified tank charging pump DHC 19 Solar charging switchover 25 Cooling switchover 26 Primary pump 27 Hydraulic buffer relief 07 Variable output 2 For setting values see parameter OFF 06 EN2H 0221GE51 R0808 83 Operation SDC DHC Para Designation Setting range Setting values Factory Setting meter setting 08 Variable input 1 OFF No function OFF 1 Outside sensor 2 2 Heat generator sensor 2 3 Tank sensor 2 4 Buffer sensor 2 5 Request contact 6 External error message input 7 Return maximum limit of mixed heating circuit 1 8 Return maximum limit of mixed heating circuit 2 9 Return temperature sensor 10 External heat generator cutoff 11 External switching modem 12 External information 13 Total flow sensor 14 Co
157. ircuit pump extended running time NOTE 7 2 17 Function See also EN2H 0221GE51 R0808 The pre running time determines the switch on delay of the burner and thus the pre running time of the respective shut off device used motor valve motor throttle to ensure trouble free circulation within the heat generator when switching on the burner The setting of a pre running time is only relevant if a shut off device e g motor throttle is used instead of a boiler circuit pump at a variable output Actuators with reversible motors must be operated via an auxiliary relay with a switch over contact separate control phases Lopen Lciosea When the burner switches off a boiler circuit pump is switched off after a delay based on the set time to prevent a safety switch off of the heat generator at high temperatures The extended running time depends on the type of heat exchanger used and is to be adapted accordingly An external heat generator disable affects the output of the boiler circuit pump Return increase To prevent the return flow temperature from dropping below the minimum return temperature required by some heat generators the control system features various options for raising the return temperature Once one of these return control options is active a menu is activated where the appropriate settings can be entered The parameter minimum return limit determines the lowest allowable return flow temperature for systems
158. is accepted by pressing the input button Cycle temperature Once the switch off time is accepted the associated cycle temperature appears flashing and can be changed immediately with the input button lt 2 With heating circuits the displayed cycle temperature is always based on the desired room temperature with the hot water circuit it is based on the desired normal hot water temperature in the selected cycle A flashing cycle temperature is accepted by pressing the input button At the same time the last called up cycle appears flashing so that it may be monitored additional cycles can then be selected directly and edited in the same way in the order switch on time switch off time cycle temperature EN2H 0221GE51 R0808 SDC DHC Operation Switching time programming programs P2 and P3 disabled Upon accessing the menu selection level the Timeprograms menu always appears first Enabling of programs P2 and P3 in the System Parameters menu see 5 2 Menu selection level pg 48 Select heating circuit Select day and cycle Change Change Change G Start of heating PO Temperature Monitoring Default i Copy circuit Only appears if there are switching times in the second heating cycle Return BPEI35 Return to the basic display EN2H 0221GE51 R0808 HC MC 1 MC 2 DHW Hcy Direct heating circ
159. it HC 1 5 Mixed heating circuit 1 MC 1 1 Mixed heating circuit 2 MC 2 1 x 3 50 3 25 3 00 2 75 2 50 F4 4 x Boiler flow temperature C y Outside temperature C a Toom C Menu selection level The control device contains a menu selection level that is structured differently depending on the respective device version gt Press and hold input button for approx 3 seconds The menu selection always begins with the TIME DATE menu gt Turn input button k to select additional menus gt Press input button to confirm the selected menu EN2H 0221GE51 R0808 Operation SDC DHC z ndut jqenea Jo sosu yndut jqeea JO JOSU8S 40309109 Jo Josues Joyng JOSUBS 1098 09 Josues MOJ Z HNO Bure y p xXIN JOSUSS MOI HNOJ Buge y p XIN JOSU S 197EM JOH Josues Joyesouab e H JOSUaS PISINO uoleiqijeo 1osues 6 ebessow jjne4 g ess w yne 4 e6essew yne 9 ess w yne g ess w jjne4 p obessow ney g eBessow yne z ebessow yne ess w yne z sebessow yjne4 ys9 Z dwnd yno119 4s dwind yno119 4s duund No119 159 suoljounj 39S 1S9 1S9 3S9 s3 z J0 OW J1 XIN 4S9 JO OW J XIN 3s0 Aejay Zindjno ajqeuen yndyno ejqeue duind Buipeo yue L 6une y pexiyy B
160. ith a call up of the first parameter in the respective menu once again After the parameter values are reset a return to the first parameter in the System Parameter menu occurs Complete reset To reset all settings a complete reset of the device can be carried out A complete reset is initiated when the 4 2 KO and keys are pressed simultaneously until the controller restarts DHW menu This menu contains all parameters required to program the hot water circuit except the hot water switching time programs T1 Operation SDC DHC 78 5 2 4 1 Factory setting Setting range NOTE 5 2 4 2 Factory setting Setting range Set values NOTE Night time hot water temperature This parameter specifies the temperature in the hot water generator between the operational readiness times in automatic mode 40 C 5 C to set normal hot water temperature value If a hot water thermostat see parameter 05 transducer for hot water circuit is used to detect the hot water temperature this parameter is skipped Legionella protection day OFF OFF MO to SU ALL OFF The legionella protection function is not active MO to SU Legionella protection is activated on the selected day of the week at the legionella protection time set in the following parameter ALL The legionella protection function is activated daily at the legionella protection time set in the next parameter If a
161. ith floor heaters use a system thermostat for pump forced switch off 209 Hydraulic Components SDC DHC 210 Buffer siphon function Buffer start up protection Buffer discharge protection Whenever the buffer tank is not being loaded by the heat generator buffer setpoint reached the differential between the heat generator temperature and the buffer tank temperature is measured continuously if configured to do so The buffer loading pump is switched on as soon as the temperature differential rises above the set extended running switch on differential The buffer loading pump is switched off immediately when the temperature differential drops to the extended running switch off differential This siphon function ensures that excess energy in the heat generator e g due to extended heating will not be lost When operating a heating system without buffers boiler start up protection is generally implemented via temporary separation of the energy consumers from the heat generator switch off of pumps close mixed heating circuits With buffer operation there is no start up protection for the heat generator acting on the heating circuits The start up protection only acts on the buffer loading pump If the buffer minimum temperature is undershot when the buffer start up protection is switched on all consumer circuits heating circuits hot water are separated on the water side pumps switch off The buffer start up pro
162. its respectively If no controlled heat generator is used e g heating by wood boilers only buffer functions such as forced dissipation into the heating circuits can be used by connecting and activating buffer sensor 1 to a variable input To support the full range of available combination options in multivalent heating systems with buffer support the control system offers the possibility to set various control modes for buffer operation The different settings cause different processing sequences of heat demand for heating circuit and hot water In the following the different control modes are illustrated using exemplary hydraulics layouts EN2H 0221GE51 R0808 SDC DHC Hydraulic Components EN2H 0221GE51 R0808 Control mode 1 Loading control for heating circuit and hot water demand System hydraulics GF a a Heat generator c Hot water tank b Buffer tank Heating circuit and hot water controls send their demand values to buffer control Buffer control demand additional energy from the heat generator via the buffer loading pump See the table below for detailed correlations Control mode 2 Loading control for heating circuit demand System hydraulics PFa a Heat generator c Hot water tank b Buffer tank 201 Hydraulic Components SDC DHC 202 Heating circuit controls send their de
163. ld be lost in case of a power failure 143 Hydraulic Components SDC DHC 144 Returning 7 2 Function The operating ours and start ups can be reset separately for stage 1 and stage 2 via two parameters in the Heat Generator menu Heat generation heat exchanger district heating The heat exchanger control assures that the right flow temperature is provided for all heating demands The setpoint for the heat exchanger s secondary flow temperature is the maximum selection of all the required flow setpoints An increase is to be entered under parameter 01 Para Designation Range Presetti Step Unit meter ng 01 Increase 10 50 O 0 5 K The setpoint for the secondary flow temperature has a maximum limit through code 02 There is a fixed minimum limit of 10 C lt 10 C corresponding to the functionality of the return interval flushing The parallel shift is valid only if there is a demand higher than 15 C Para Designation Range Presetti Step Unit meter ng 02 Max flow 10 130 90 0 5 C temp setpoint EN2H 0221GE51 R0808 SDC DHC Hydraulic Components EN2H 0221GE51 R0808 On Off operation of the district heating valve To always ensure a minimum flow so that the heat meter can work precisely pure on off switching is provided in low load mode Code 03 is suitable for this function as shown in the following diagram
164. llector return sensor 15 District hot water strat ified tank charge sensor 16 Exhaust gas sensor 18 Solids buffer sensor 19 Buffer sensor 1 29 Hygrostatic switch off 30 Room sensor NTC 20 of direct heating circuit 31 Room sensor NTC 20 of mixed heating circuit 1 32 Room sensor NTC 20 of 84 mixed heating circuit 2 EN2H 0221GE51 R0808 SDC DHC Operation Para Designation Setting range Setting values Factory Setting meter setting 09 Variable input 2 For setting values see parameter OFF 08 does not include setting value 16 exhaust gas sensor however 10 Variable input 3 For setting values see parameter OFF 08 does not include setting value 16 exhaust gas sensor limit sensor of district heating VFB however 11 Indirect return lift OFF ON OFF ing via mixed heating circuit 5 4 2 System parameters menu SYSTEM The parameters in this menu refer to general limit parameters and specification values in the heating system used Para Designation Setting range Setting values Factory Setting meter setting Lan Language DE German guage selection GB English selec OA FR French tion IT Italian NL Dutch ES Spanish PT Portuguese HU Hungarian CZ Czech PL Polish RO Romanian RU Russian TR Turkish Swedish N Norwegian EN2H 0221GE51 R0808 85 Operation SDC DHC Para Designat
165. low setpoint 26 C 22 C 2K 2 K The SUMMER SWITCH OFF function System Parameters menu parameter 04 has priority over the HEATING LIMIT function The FROST PROTECTION function System Parameters menu parameter 05 has priority over the HEATING LIMIT function EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 4 7 Function NOTE 7 3 4 8 Function EN2H 0221GE51 R0808 Heating circuit room frost protection limit This function determines the room temperature of the corresponding heating circuit during switch off mode with frost protection active e during holiday mode e in automatic mode between the heating cycles with active ECO function see parameter 1 Reduced mode e in constant reduced mode with active ECO function see parameter 1 Reduced mode In conjunction with a wall device the heating circuit is adjusted to the frost protection room temperature Without a wall device the set value serves as a specification for the lowered room temperature and is adjusted to it With continuous frost protection mode and sensitive objects in the house like antiques plants etc the set value is to be adjusted accordingly Mixed heating circuits cooling switch over If the cooling function was activated at a variable output Hydraulics menu parameters 6 and 7 setting 25 the additional parameters appear in the System Parameters menu parameter 25 and in the Mixed Heating Circuit 1
166. lve is switched to the hot water tank relay output closed External mode request does not act on heating generator and heating circuit In external mode hot water loading is switched only according to the set switching differentials There is no heat demand for the heat generator There is no tank priority mode for the heating circuits The parameters boiler parallel shift tank discharge protection pump extended running time and boiler start up protection no longer act on the hot water loading pump Tank discharge protection EN2H 0221GE51 R0808 SDC DHC Hydraulic Components NOTE Boiler temperature offset Switching differential Loading enabling Pump extended running loading cancellation EN2H 0221GE51 R0808 With discharge protection activated and a hot water demand present the hot water loading pump enabled only when the temperature in the heat generator rises by more than 5 K above the current temperature in the hot water tank This measure prevents any rear tank discharge through the heat generator The hot water loading pump is disabled again as soon as the temperature differential between the heat generator and the hot water tank has dropped to less than 2 K The heat generator minimum temperature limit operates continuously to protect the heat generator and blocks the hot water loading pump in case of temperatures below the set value ATTENTION In case of hot water temperature specifications
167. mand value to buffer control Hot water and buffer controls demand energy from the heat generator when required With hot water priority activated this function acts on the buffer loading pump and not on the heating circuits See the table below for detailed correlations Control mode 3 Discharge control for heating circuit and hot water demand System hydraulics a Buffer tank c Hot water tank b Heat generator Heating circuit and hot water controls send their demand value to buffer control The buffer loading pump output switches ON when the energy demand can be met by the buffer If the energy in the buffer is insufficient buffer control demands additional energy from the heat generator and the buffer loading pump switches OFF If there is no demand for the heating circuits and hot water loading the buffer loading pump switches off See the table below for detailed correlations EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Control mode 4 Discharge control for heating circuit demand System hydraulics AF SN i A a T aw VV A N a Buffer tank c Hot water tank b Heat generator As control mode 3 except that the demand from hot water control are sent directly to the heat generator An active hot water priority only acts on the heating circuits when there is no buffer discharge in progress See t
168. me and date are already set at the factory and are backed up by a battery The time switch functions based on a basic program and the control functions are preset for common heating systems with low temperature boilers Safety instructions SDC DHC Power supply Do not disconnect the controller from the mains supply The battery for saving all individualised data is otherwise unnecessarily strained The frost protection function of the controller is deactivated Connection conditions All electrical connection work may only be carried out by qualified personnel Cable cross sections 1 5 mm for all cables carrying 230 V power supply burner pumps actuator 0 6 mm for bus cables recommended type J Y St Y 2 x 0 6 0 5 mm for sensors selectors and analog signal cables Maximum cable lengths Sensor selector and analog inputs We recommend using cables no longer than 200 m Longer connection lines could be used but increase the risk of interference Relay outputs Unlimited cable length Bus connections Max length of 100 m from the first bus subscriber to the last one incl wall modules Cable installation Install cables for sensors apart from the cables carrying 230 V Branch boxes in the sensor cable must be avoided EN2H 0221GE51 R0808 SDC DHC Safety instructions 2 3 Automatic anti legionella mechanism Manual mode Emission measurement EN2H 0221GE51 R0808 Ground
169. menu refer to the type of the respective district hot water station and the associated specific control functions Para Designation Setting range Setting values Factory Setting meter setting 01 Increase OFF 10 to 50 K 0 02 Maximum limit of 10 130 C 90 flow temperature setpoint 03 Minimum district 0 50 10 heating valve stroke 04 Secondary flow 0 1 30 K 5 boost 05 Adjustment time 0 60 min 3 06 Runtime of district 10 1800 s 120 heating valve 1 07 Runtime of district 10 1800 s 30 heating valve 2 08 Maximum return 0 100 C 90 temperature setpoint 09 Application point OFF 40 to 10 C OFF variable district heating return temperature 10 Maximum return 0 100 C 90 temperature setpoint with hot water circuit charge 104 EN2H 0221GE51 R0808 SDC DHC Operation Para Designation Setting range Setting values Factory Setting meter setting 11 Return limit of 0 Temperature 0 district heating parameters 12 through valve 15 are not displayed 1 Volume flow and temperature parameters 12 through 14 are not displayed 2 Heat output and temperature parameters 13 through 15 are not displayed 12 Calibration of heat 1 9999 1 output T3 Calibration of 1 9999 1 volume flow 14 Maximum heat 1 9999 kW 9999 output 15 Maximum volume 0 01 99 99 m h 99 99 flow OEM 5 4 8 Return increase menu
170. minated The maximum set value is always 3 K below the selected switch on differential The activated solar loading pump remains in operation for this set time The minimum runtime has priority over the switch off differential switching differential OFF This limit is used for thermal protection of the collector and causes forced switch on of the solar loading pump if the set value is exceeded If the temperature drops below the set value 5 K all solar functions become active again based on their settings EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Solar tank maximum temperature limit Solar control mode Heat generator cycle disable EN2H 0221GE51 R0808 If the temperature in the solar tank hot water tank or buffer tank exceeds the set value an active forced switch on of the solar loading pump see description for collector maximum temperature limit is interrupted This forced switch on is enabled again as soon as the solar tank temperature falls more than 10 K below its set limit This function defines the solar loading mode Solar priority mode disabling of heat generator During solar loading all demand for the heat generator is suppressed Solar parallel operation During solar loading demand for the heat generator is permitted Solar priority mode hot water setpoint control During solar loading demand for the hot water control at the heat generator is suppressed Solar priority mode
171. mit 208 Sensor 2 211 Setpoint temperature 208 Siphon function 210 Start up protection 210 Stratified loading 211 Switching differential 209 Temperature offset of heat generator 209 Buffer tank Function 199 Maximum temperature limit 208 Building type 120 Burner counter mode 143 Bus address 221 Bypass pump 160 C Cascading 232 Charging pump 157 Circulation pump 194 Circulation pump 155 Climate zone 122 Collector maximum temperature limit 196 EN2H 0221GE51 R0808 Conditional priority 189 Constant temperature control 168 Cooling switch over 177 Cycle operation 125 D Delay enabling full load in cascade operation 235 Demand contact 219 Design temperature 122 District heating control 156 District heating valve 145 E Economy interval 194 Electrical heating element 195 Electromagnetic compatibility 15 Emission measurement 238 Enabling mode stage Il 134 Exhaust gas temperature monitoring 142 Extended running time CHP 157 External switching modem 218 F Fixed value control 168 Flue gas temperature limit 143 Forced discharge 141 G Global fault message output 217 Grouping for base and peak loads 236 H Heat exchanger valve 145 Heat generator Cycle disable 213 Heat generator 255 Index SDC DHC Fault 126 Maximum temperature limit 130 Minimum temperature limit 129 Reset 135 Sensor control mode 130 Start up protection 128 Heating circuit bus authorisation 231 H
172. mixed heating circuit valves are enabled again Heat generator sensor control mode There are various ways in which the heat generator can react to a malfunction of the heat generator sensor Burner switch off in case of a faulty heat generator sensor A fault message appears in case of a short circuit or interruption of the sensor the burner will be switched off External burner switch off In case of the interruption of the sensor the burner is switched off without a fault message It is used for example for external EN2H 0221GE51 R0808 SDC DHC Hydraulic Components See also 7 1 6 Function NOTE See also 7 1 7 Function EN2H 0221GE51 R0808 burner switch off or enabling in case of the interruption of the heat generator sensor ATTENTION Only Ag hard silver Au gold or Ni nickel are to be used for the contacts In case of a sensor short circuit a relevant fault message appears and the burner is blocked Burner enabling in case of a faulty heat generator sensor In case of a sensor short circuit or interruption a fault message appears upon simultaneous unlimited enabling of the burner The control of the heat generator is carried out only manually by means of the mechanical boiler temperature controller boiler thermostat on the boiler panel according to the set value A ATTENTION Activation of this setting is only permissible if an electromagnetic boiler temperature controller is
173. mp has been switched off the set time must pass before loading of the buffer tank is continued through the conventional heat generator This is an automatic function of the controller If the solar loading pump was switched off longer than 24 hours it is operated for approx 20 seconds to prevent blocking via corrosion Tank loading switch over In systems that have both an external hot water tank and a buffer tank a diverter valve can be used to switch between loading the hot water tank and loading the buffer tank from solar power system This allows economical and effective use of solar power 213 Hydraulic Components SDC DHC to support heating during periods when less solar power is available To ensure that the solar tank in priority operation temperature sensing by the sensor of the solar loading switch over usually hot water tank can be loaded checks are performed at regular intervals to determine whether sufficient solar power is available meaning the solar panel temperature is sufficiently high for loading and the set switch over temperature can be reached Diverter valve This function allows switching of a diverter valve according to the load condition of two heat storage tanks two point output so that solar energy can be used to support heating during periods of low solar intake Test cycle f the switch over condition is not fulfilled after a preset time interval of 30 minutes meaning the temperature in the
174. ms sowing Bulyoyms sowing Jeuing wnwluly uoyouny ul UOKDe O1d was s BuyeoyH uole1edo peonpey adojs ZIL NDAD 5 Jojo WOO H UOXsUUOD WOOY yejsowuay wooy s04j Wooy Hull Duge H anno Bulyeay Buneey pexiw adojs yna uoouny yui uoos osd 40102 WOO uonosuuoo WOO wejsXs Bu e uoneiedo peonpe EI Jejsowsay WOOY 1501 WOOY wi BuneeH 4 J i a TERENIE ia nn u e H Bu e y yoas1q 6 Ja ey ae ega INOJ 19 eM SILI 9lul uonoazosd Aep uonoaosd a al Ny uol 99 01d SPOW JOUOS 1 yem oy 104 ywi e uonoa oud PERPER x Deane yyBiu ye 192M JOH 1342M JOH EO TES IS abieyosip yueL PNOO JBJEM JOH a ynyesaduu9a Xew Bisa eee Ce eljouoiba7 IE Malse eonoj yesyo anyesadw L ndul z ndut yndu uol 99 01d uonoa s QUOZ yewij PIAEHEA 104 ainpow a qeueA Jo Npow aiqeueA 104 ajnpoww N JeeHEWWNS apow u es do wei6oid oul NE dayawesed w 4 S S yoejuoo puewaq yoejuoo puew q 92 uo9 puewaq Seen i 6 uoneinbyuod RE ETT yndjno dwnd yinoui9 yndyno g 1no119 nd no 1 noo yndjno duind oeWOYoS Salineik z yndul jqeuen ndu jqeyea zindo ajqeuen NY IGEHEA Bunjesy paq Bujesy pexiyy Buyeey p x y Buipeoj 19 eM 0H NeIp H HOE RH J8A0 YOIMS yuon Aeq Jeo Sul ajeg Burwwes6olg 9 G v iA L 0 Jojoweled 49 EN2H 0221GE51 R0808 SDC DHC Operation Josuas wool Z 4NI Buneey pexi Josues Wood n9119 Bunesu pexii JOSU
175. n is disabled and protected from frost At storage temperatures below 5 C a reload to up to 8 C takes place Total deactivation of heating and hot water with full building protection The heat generator and hot water production remain in operation in case of external demand or demand by other heating circuits on the bus network The heating circuit pumps are switched on briefly every day pump anti blocking protection The standby mode remains active until another operating mode is activated Activated continuous standby mode appears in the basic display with the information STANDBY Switching time programs Holiday programs button Using this button you can create individualised switching time programs for heating and hot water operation and set holiday mode See 5 1 2 6 1 Holiday mode pg 34 and 5 2 2 Timeprograms menu pg 55 33 Operation SDC DHC 5 1 2 6 1 Setting 34 Application Holiday mode In holiday mode the heating circuits can be switched off and protected from frost or operated based on the settings for the RED HEATING operating mode for the duration of the holiday based on the presetting Direct circuit or Mixed heating circuit 1 Mixed heating circuit 2 menu parameter 25 holiday operating mode gt Press button The menu selection level Switching time programs Holiday programs appears in the display Turn input button to the left HOLIDAY app
176. nction heating acc to DIN 4725 Part 4 setting 1 e Constant heating at 25 C on the start day and for the following three days e Subsequently for another four days with the set maximum flow temperature with a maximum limit of 55 C Tvtsol rC ST1 23456 7 8 9 10111213 14 15 16 17 18 1920 21 22 23 2425 26 t Maximum temperature setting 40 C Progression of screed function over time with functional heating Heating function for floor covering setting 2 The heating of the floor covering follows a preset temperature profile Starting with 25 C on the first day the requested temperature rises by 5 C per day over the following days until the maximum temperature of the heating circuit is reached After that the setpoint temperature is reduced with the same stepping until the base point of 25 C is reached again Maximum temperature setting for the heating circuit 40 C 1 day constant heating at 25 C 2 day constant heating at 30 C 3 day constant heating at 35 C 4 day constant heating at 40 C 5 15 day constant heating with max flow temperature 16 day reduced heating at 35 C 17 day reduced heating at 30 C 18 day reduced heating at 25 C 167 Hydraulic Components SDC DHC 168 7 3 2 NOTE Function See also 7 3 3 Function On the start day heating to 25 C is carried out until midnight The first day of floor covering heating starts at midnight of the foll
177. nection instead of the general connection delay Cascading menu parameter 02 For further stages connection occurs based on the connection delay that can be set EN2H 0221GE51 R0808 SDC DHC Hydraulic Components EN2H 0221GE51 R0808 For hot water loading without heating tank priority the number of heat generators is limited by the setting in the quick hot water connection parameter With parallel operation heating circuit and hot water demand simultaneously there is no stage number limitation With active hot water loading reversion of stages occurs under consideration of the configured switch off delay If heating circuit operation is active with more stages than were enabled for hot water circuit operation and hot water loading then occurs in priority mode the stages above and beyond the number of stages enabled for hot water loading are switched off directly Reversion of the activated stages does not occur in parallel operation The stage sequence switch over power must be taken into account for connection of the following stage Example e Cascaded system with five stages e Parameter 02 1 min e Parameter 03 2 min e Parameter 09 3 min Heating 1min 1min 1min 1min wezi wez2 wezs weza wezs 2min 2min 2min 2min e Connection and disconnection with the configured delay of parameters 02 and 03 Tank priority no heating demand 10s 10s wezi
178. nes the enabling of the room sensor in conjunction with a wall device room sensor with the direct heating circuit and all parameters affected by the room temperature sensing depending on the application with the following conditions e No room sensor connection with installation of the room sensor outside the inhabited area e g in unheated rooms like basements etc e No room sensor connection with multi family dwellings that work with different room temperatures based on different assignments and do not offer a reference room e With room connection switched off the current room temperature is not displayed in the system information e The flow temperature is corrected purely by weather conditions for room influence and connected outside sensor e With the room sensor switched on the heating circuit is controlled based on the weather taking into account the current room temperature The room temperature deviation is taken into account based on the room factor parameter setting e If SDW 30 wall devices are connected the actual room temperature is indicated in the basic display instead of the heat generator temperature e When the actual room temperature drops below the current setpoint room temperature 1 K any active summer switch off is disabled provided automatic operation was not selected This setting enables the room temperature related functions while operation via the wall device is disabled Public buil
179. nsor input can be used to switch off the heating system A sensor short circuit at the outside sensor suppresses a fault message regarding this and switches off the system The message Heating system off appears instead of the fault message in this case If a heat generator defect occurs fault message 30 1 or 31 3 and system frost protection is active at the same time boiler start up protection is switched off and thus the heating circuit pumps are started to minimise the danger of system freezing Basic display fault stack fault messages With connection of an automatic stoker further fault messages may arrive from it They are displayed as follows Fault type Fault Field 1 Field 2 Field 3 code Water SO0 1 Water pressure HIGH pressure Water S0 5 Water pressure LOW pressure Water S0 2 Water pressure MIN pressure Ventilation 1 0 Ventilation Maintenance S2 0 Maintenance Switch off Switch off OFF Service 240 1 Service EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 4 1 1 Function Application 7 4 1 2 Activation 7 4 1 3 EN2H 0221GE51 R0808 Sensor calibration If the measured values of the connected sensors do not match the actual temperatures a comparison of the sensor values is possible in the Sensor Comparison menu In this menu all sensors connected to the device can be corrected by 5 K based on the factory calibration value
180. nsured As soon as the set start time has expired the modulation switches to its normal control characteristics defined by the modulation parameters EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 1 14 Modulation of start power EN2H 0221GE51 R0808 The start power parameter determines a percentage setting for part of the modulation runtime during the start up phase With a setting of 0 the actuator valve remains always closed As soon as the set start time has expired the modulation switches to its normal control characteristics defined by the modulation parameters a Modulation e Base load b Upward downward modulation f On depending on the control deviation c Adjustment operation g Start d Start up phase x Starting load 139 Hydraulic Components SDC DHC 7 1 15 OpenTherm Electrical connection 140 e OpenTherm is the plug amp play bus system e OpenTherm has developed into a standard in heating technology Many gas condensing boilers today feature an OpenTherm connection or manufacturers offer an optional OpenTherm interface e The OpenTherm bus uses simple bi directional 2 wire communication between the heat generator and the room controller The simple OpenTherm 2 wire bus allows bi directional communication between the room controller and heat generator i e data exchange occurs in both directions In use the simplicity of the OpenTherm system is key Th
181. nt value drops below the set limit heating is turned on again Heating is interrupted if the outside temperature exceeds the set limit by 1 K EN2H 0221GE51 R0808 SDC DHC Control Functions NOTE See also EN2H 0221GE51 R0808 Operation with room temperature sensing As long as the room temperature is above the set room setpoint the heating circuit pumps are running if outside temperatures are below the set freezing limit If the room temperature drops below the set room setpoint heating is resumed Switch off occurs again when the room temperature exceeds the set room setpoint by 1 K If at this moment the outside temperature is still below the set freezing limit only the heating circuit pumps remain active If not every heating circuit is operated with room temperature sensing different frost protection functions can be assigned to the individual heating circuits If for example a mixed heating circuit is operated with room temperature sensing and the direct heating circuit is not the latter s heating curve and room temperature setpoint are to be set as low as possible In connection with a second outside sensor the frost protection function is activated as soon as one of the two outside temperatures drops below the frost protection limit In case of a faulty outside sensor frost protection is activated continuously A ATTENTION In connection with a room sensor the thermostat function is not active with
182. nts SDC DHC 196 7 3 6 7 3 6 1 Function NOTE NOTE Solar switch on differential Solar switch off differential Minimum runtime of solar loading pump SOP Collector maximum temperature limit Solar Solid fuel Buffer Solar function The solar function makes it possible to combine solar power systems with heating and hot water production systems in order to support the economy of the system The solar loading pump can be controlled according to various switching conditions This function can only be called up if a configurable switching output was occupied with a solar loading pump Two separate sensor inputs are available for the connection of the sensors e KVLF for the solar collector sensor e KSPF for the collector tank sensor For heat metering an optional collector return sensor KRLF can be connected via a variable input VI1 VI3 The solar loading pump is disabled if the collector flow sensor is defective switching differential ON With sufficient solar heat energy the temperature differential between collector flow and tank will become bigger than the set value and the solar loading pump is switched on to load the buffer tank The minimum set value is 3 K above the switch off differential switching differential OFF If the temperature differential between the collector flow and tank falls below or equal to the set value the solar loading pump is switched off and loading ter
183. o the volume flow or thermal output The requirement for this function is the heat meter whose information pulse per volume or pulse per thermal output is called upon for this limit Calibration of the thermal output and the volume flow with parameters 12 and 13 allows calculating the entities thermal output and volume flow These values are displayed with the C4 key Setpoint limits for thermal output and volume flow are entered under parameters 14 and 15 This limitation function operates as PI controller above the setpoint value using the same parameters as the temperature control function The values are independent of the outside temperature The heat flow is derived from a volume signal in the following way EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 2 14 NOTE Function Bus system Charging pump extended running time See also EN2H 0221GE51 R0808 The pulses for the amount of heat flowing through are counted e g 5 pulses within a minute Through calibration via parameter 12 the actual thermal output in kW is calculated for input 60 pulses min 1 Hz o_o OKWh 3600kW t min Charging pump CHP This function is only active if the charging pump function was assigned to one of the outputs direct heating circuit pump variable output 1 or variable output 2 in the Hydraulics menu A charging pump to supply remote parts of the heating system is active at every heating or ho
184. ode all heat generators adjust to the same boiler setpoint temperature parallel operation As soon as the cascade manager comes back into operation cascade control is reactivated automatically To enable the cascade function to process fast switching events the cascade data are transferred with a higher priority Consequently the data transmission from any device to the master device and of the request values from the master to the slave devices takes no longer than approx 3 seconds Commissioning maintenance and troubleshooting help Automatic set function The central devices are equipped with a function which ignores unused sensors and control functions Fault messages from non connected sensors are not displayed The AUTO SET function is only active at power up There are two possibilities for calling up the AUTO SET function If the commissioning date has not yet been stored and the corresponding system parameters for activating this function are set to ON connected or disconnected sensors are registered automatically whenever the control device is switched on Fault messages from sensors short circuit interruption are suppressed in this period After the commissioning date has been saved a change to the sensor configuration is only still possible after the manual SET function The AUTO SET function can be enabled at any time again for a day day change using the system parameter 237 Hydraulic Components SDC DHC
185. on for approx 3 seconds until the following appears in the display Holiday off Current date Current date current date 250 days An active holiday program appears in the basic display with information on the return date System information button Calls up system information such as temperatures and counter data The information on the outside temperature appears first after the mo Gi button is pressed Turning the input button causes the system temperatures and the counter and consumption states and operating states of the connected system components to appear Pressing the input button causes the respective setpoint values to appear Collector flow temperature No setpoint Solar tank temperature No setpoint Outside temperature Averaged value The displayed information see the following example is independent of the installed or enabled system components and control circuits 35 Operation SDC DHC Operating overview Press f v Turn input button to the left Program operating mode direct heating circuit pump status Program operating mode mixed heating circuit 1 pump status Actuator of mixed heating circuit 1 status Program operating mode mixed heating circuit 2 pump status Actuator of mixed heating circuit 2 status Program operating mode hot water circuit pump status Heat generator status Direct heating circuit pump function status
186. on pulses if the control deviation is not yet remedied l part The adjustment time remains constant despite varying control deviations Actuator end position function This function determines the type of control signal in the end positions OPEN or CLOSED of each actuator 1 Continuous voltage at connection OPEN or CLOSED at the respective end position 2 De energised at end position OPEN or CLOSED respectively Recommendation for the basic setting of the adjustment time with different heating systems EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 5 7 3 5 1 Function Hot water circuit daytime See also EN2H 0221GE51 R0808 Hot water production Hot water tank loading SLP The output controls a hot water circuit loading pump during the respective operational readiness times upon demand The hot water daytime temperature provides for the desired hot water temperature during hot water circuit operational readiness times in automatic mode and in the PARTY and HEATING control modes This set value is the initial value for the temperature specifications that can be set for each heating cycle in the switching time programs The temperature settings in the switching time programs are automatically adjusted when the hot water daytime temperature is changed Example Before Daytime hot water temperature value 50 C Temperatures in switching time program 05 00 hours 08 00 hours 60 C 08 00
187. onding time bar display is adjusted to the left hand side If the switch on time is made equal to the switch off time the corresponding cycle is deleted A subsequent cycle is automatically shifted to the position of the deleted cycle upon acceptance With subsequent insertion of a cycle that has been bumped up the corresponding day of the week must be reprogrammed A flashing switch on time is accepted by pressing the input button Switch off time The switch off time is the end of heating or with enabled switch off optimisation the end of assignment Once the switch on time is accepted the associated switch off time appears flashing and can be changed with the input button The time bar in the top part of the display provides an overview of all programmed cycles between 0 00 and 24 00 hours on the selected day of the week 57 Operation SDC DHC 58 NOTE 5 2 2 4 3 The switch off time cannot be set higher than the switch on time of a subsequent cycle If the switch on time is changed the corresponding time bar display is adjusted to the right hand side If the switch off time is made equal to the switch on time the corresponding cycle is deleted A subsequent cycle is automatically shifted to the position of the deleted cycle upon acceptance With subsequent insertion of a cycle that has been bumped up the corresponding day of the week must be reprogrammed A flashing switch off time
188. onent 2 0 sceeeceeeeeeeeeeetceeseeeeeeeeecnen 217 7 3 10 1 Global fault message INPUt eee cece cette eter eeeeeeeeeeeees 217 7 3 10 2 Global fault message output eee cece eee e teeter eeeeeeeees 217 7 3 10 3 Timer 217 7 3 10 4 External switching modem ccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 218 13 1025 EXte rial iNformatiOrn sc everesecesepesecesacesecerapeseceseemsererapesecesegeseeey 219 3106 Demand Contact ccccncdktanccdcncddtondokediendokehekd 219 7 911 Bus HCOMMMMIMIGALON cusco sect uceicd nade nedencd hte Aedecd ktdeite Ledeicd bt Eue 221 7 3 11 1 Bus address of central device ee ee eee eeeeeeeeeeeeeeeeeeeeees 221 7 3 11 2 Control functions via the data DUS eects 222 7 3 11 3 Operation of wall devices ccc cceeeeeeeeeeeeceeeeeeeseeeeeeeeeeeeeeees 227 7 3 12 Cascading of heat generators in the bus system cceeeeees 232 EN2H 0221GE51 R0808 SDC DHC Contents 7 3 12 1 General description of cascading of control devices 232 7 3 12 2 Function of the cascade parameters seeeeeeeeeeeeees 233 7 3 12 3 Mode of operation of cascade Control ccccceeseeeeeeeeeees 234 7 3 13 Commissioning maintenance and troubleshooting help 237 7 3 13 1 Automatic Set function 2 2 2 2 ceeseeeeeeeeeeeeeeeeeeeeeeeneeeeseeteees 237 7 3 13 2 Emission measurement not for DHC
189. onnection of an optical or acoustic transducer and are forwarded to the corresponding gateways With connection of an automatic stoker further fault messages may arrive from it They are displayed as follows Fault type Fault Field 1 Field 2 Field 3 code Water S0 1 Water pressure HIGH pressure Water S0 5 Water pressure LOW pressure Water S0 2 Water pressure MIN pressure Ventilation 1 0 Ventilation Maintenance S2 0 Maintenance Switch off Switch off OFF Service 240 1 Service Fault message log The control unit features two fault message logs FAULT MESSAGE for system faults and FAULT 2 for faults from automatic stokers in which max 20 fault messages can be saved The fault messages are displayed with their date time and fault type fault number The query is carried out in the sequence of the entered fault messages in the Fault Message menu EN2H 0221GE51 R0808 247 Hydraulic Components SDC DHC NOTE 248 7 4 1 The last most recent fault message is in first position the previous fault messages are shifted down by a position with each new fault message The fifth fault message is deleted when a new fault message appears Operating Key Menu Parameter information Display of logical SYSTEM 13 fault messages Fault memory FAULT MESSAGE ERR 1 ERR 5 inquiry In the case of condensing systems with automatic stokers the outside se
190. or Operating status MJIHLATIIN Modulating burner If a single stage modulating of modulating STE pgo Specified heat generator is set heat generator display of actual value and setpoint occurs in Hot water circuit autg P FfG Hot water circuit Hot water program Holiday operating status specified Absent Til Party Til Auto Summer Heating Red Heating Standby Switching time program P1 P2 P3 control mode Day RED ECO EN2H 0221GE51 R0808 41 Operation SDC DHC Information Display Condition Remarks Function and OUTPUT IEP Outputs specified Solar SOP circulation status of direct en nuvarr based on function CIR electric heating rod heating circuit ELH feeder CHP boiler pump circuit KKP1 KKP2 fault message SMA return RLP buffer PLP solid fuel FSP heating circuit HKP constant KP timer CLOCK Function and guTPuT v 4 Outputs specified Solar SOP circulation status of variable output 1 based on function CIR electric heating rod ELH feeder CHP boiler circuit KKP1 KKP2 fault message SMA return RLP buffer PLP solid fuel FSP heating circuit HKP constant KP timer CLOCK Function and status of variable output 2 z ma EN EAI TN FF Outputs specified based on function Solar SOP circulation CIR electric heating rod E
191. owing day Tvisoll PC ST 12 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 t Maximum temperature setting 40 C Progression of screed function over time with floor covering heating Heating circuit constant temperature control This function must be activated in the Hydraulics menu for the corresponding heating circuit direct heating circuit mixed heating circuit 1 mixed heating circuit 2 The control circuit is operated with a constant temperature specification The demand value is transmitted to the heat generator The switching program of the respective heating circuit and the control modes can be activated The specification of the constant temperature occurs via parameter constant temperature setpoint Upon activation of the function on a mixed heating circuit output a flow sensor is to be set for adjustment of the flow temperature 5 4 4 Direct heating circuit menu UNMIXED CIRC Pg 92 Fixed value control As with constant control The demand value is not transferred to the heat generator and the switching time program and control modes can be activated EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 4 7 3 4 1 Function No room sensor Room sensor active Room sensor active operation disabled Application EN2H 0221GE51 R0808 Consideration of the room temperature room influence Heating circuit room connection This function determi
192. parallel with the flow temperature To ensure the desired setpoint temperature for remote heating circuits as well 5 4 4 Direct heating circuit menu UNMIXED CIRC Pg 92 Heating circuit pump extended running time The heating circuit pump ceases operation if there is no heat demand from the heating circuit Safety switch off of the heat generator is prevented While the pump extended running of a mixed heating circuit pump MC 1 and MC 2 only is active the mixed heating circuit continues to adjust its setpoint without forwarding a demand value to the heat generator 5 4 4 Direct heating circuit menu UNMIXED CIRC Pg 92 Screed function This function is not active if the heating circuit control is used as constant control CC If the screed function is active for a direct heating circuit only requests of this heating circuit are forwarded to the heat generator Requests of other heating circuits are suppressed Activation of the screed function for a non mixed heating circuit only functions at the direct heating circuit of the central device with address 10 CD1 DHC and only if no other central devices are present on the bus network 165 Hydraulic Components SDC DHC Function 166 If another controller addr 20 50 is connected to the direct heating circuit pump while the screed function is active the screed function is cancelled automatically for the direct heating circuit pump All oth
193. perature of 70 C the actuator in the modulating burner must cover a temperature differential of 50 K starting from a room temperature of 20 C This corresponds to a control deviation of 100 The set value is calculated as follows Xp K x 50 K 100 or Xp 2 K Modulation of sample time Ta The sample time is a controller internal quantity which defines the time interval between two subsequent actuator pulses in the presence of a control deviation Shorter sample times allow finer adjustments 137 Hydraulic Components SDC DHC 138 7 1 11 7 1 12 7 1 13 Modulation of integral action time Tn The integral part adjustment time determines the dynamic behaviour of the controller and thus the time required by the controller to adjust for the actual control deviation The adjustment time is independent of the amount of deviation Modulation of runtime This function allows adjusting the actuator with regard to its finite running time to the control characteristics meaning that actuators with different runtimes react to the same deviation by readjusting by the same amount through adapting the action times The integral action time Tn remains unchanged in this However care must be taken that the latter must always exceed the runtime of the respective actuator Modulation of start time The start time parameter determines the length of the start up phase in modulation mode so that a stable start up is e
194. rating in combination with hot water pre control parameter 08 tank drainage protection does not act directly on the heat generator but on the hot water pre control Parameter 08 is always adjustable for function with pre mixer Here the OFF and ON settings have different effects which are described in the following With the setting OFF there will be no start up protection through the hot water pre control The tank loading pump is switched on without any delay With the setting ON the tank loading pump is switched on only when the flow sensor detects that the hot water setpoint temperature switching difference hot water without offset is reached e HWPC epee WH PO9 HW setpoint SLP ONif HWPC gt HW SDyy actua setpoint e SLP OFF if HWPC ona lt HW actual setpoint 151 Hydraulic Components SDC DHC 152 7 2 7 New parameters Legend HWPC poini ACtual temperature at flow sensor hot water pre control HW Hot water setpoint temperature setpoint P09 HW Value of parameter 09 hot water loading temperature offset SD w Switching difference hot water Both pumps tank loading pump and hot water pre control switch off after completion of a hot water circuit loading taking into account their extended running times If they are to switch off simultaneously identical extended running times must be selected for them Quick hot water control
195. rcuit output this output can be programmed for controlled flow mixing In this mode of return control the programmed mixed heating circuit adjusts the return temperature to the return temperature setpoint The adjustment is independent of the status of any start up protection of the heat generator The return sensor for this function is connected at the sensor input of the respective mixed heating circuit e g flow sensor 1 for mixed heating circuit 1 The mixed heating circuit pump operates like a boiler circuit pump without boiler start up protection for this purpose EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 2 17 3 Function NOTE 7 3 7 3 1 7 3 1 1 EN2H 0221GE51 R0808 Indirect return increase Indirect return increase is realised by means of the mixed heating circuit valves in the heating circuits It only works for systems without a bypass pump and without controlled flow mixing When this function is active two values are calculated independently for regulating each mixed heating circuit The first value is the control variable for the flow setpoint of the heating circuit the second is the control variable for the return setpoint The control variable used for mixed heating circuit control mixed heating circuit control variable results from the superimposition of both values In this the adjustment of the return temperature is treated with priority Indirect return control is only active
196. rdingly the allowable temperature limit for the flue gas according to specifications of the heat generator manufacturer has to be entered as the reference value for the follow up functions described above Recommended setting Nominal flue gas temp acc to manufacturer data plus 10 20 K 5 4 6 Heat generator menu HEAT GENER Pg 99 Burner counter mode The system features two operating hour and burner start up counters one each for the 1st and 2nd stages The display is output on the information level of the counter The function of the operating hour counter can be set via a parameter The operating hour counter is deactivated If an operating hour counter is connected to the corresponding inputs of the controller operating hour counter inputs this value is called upon for counting Otherwise theoretical values are determined and included switching times and switching frequency of the outputs If a signal was detected once at the operating hour counter input and the operating hour counter signal does not follow the boiler demand a fault message occurs Functions such as AUTO however a theoretical value is not determined Only signals from burners are processed The operating hour counter input can be used as a free counting input A fault message does not arise if a signal is missing Since the counter values are only stored in the permanent data memory once per day counter values of the current day cou
197. re three different modes of start up protection that can be set Unlimited start up protection When the temperature in the heat generator drops to 2 K below the set minimal limit all heating circuits are separated at the water side from the heat generator pumps off mixed heating circuit closed to pass through the dew point as quickly as possible The heating circuits are enabled as soon as the temperature in the heat generator has reached the minimum limit plus half of the burner switching differential 1 Start up protection controlled by weather conditions The heating up characteristic is the same as for unlimited start up protection meaning the heat generator remains in operation until the set minimum temperature plus half of burner switching differential 1 is exceeded Below the minimum temperature the pumps remain switched off and the mixed heating circuit closed Once the heat generator has been switched off the start up protection becomes active again only when the heat generator temperature drops below the weather responsive demand value acc to heating curve setting and nominal room setting The subsequent heating up follows the same scheme as for unlimited start up protection The result is a mean value based on the difference between the weather condition controlled demand value and the minimum limit setting This mean value will be significantly lower than the value set for a heat generator operated with a permanent
198. res and appears flashing at the bottom left hand side The current heat generator temperature appears statically on the right hand side in the basic display The set switching differential corresponds to the value of automatic control and is symmetrical to the set value Controller malfunctions emergency operation errors The maximum heat generator temperature limit is paramount to the heat generator switching differential and stops the heat generator in case of exceedance With control devices operated purely as a heating circuit expansion the setting of the temperature has no effect The last value to which the control device adjusted the heat generator temperature appears as a recommendation Press s button or button to return to the last selected operating mode EN2H 0221GE51 R0808 SDC DHC Operation 5 1 2 8 2 Function Application Cancellation EN2H 0221GE51 R0808 Emission measurement not with district heating controllers A ATTENTION Emission measurements may only be carried out by the chimney sweep Pressing the button controls the heat generator for a duration of 20 min based on the set maximum temperature limit The remaining time is displayed and counted down With two stage heat generators both stages are in operation measurement at nominal output The heat generator is adjusted to the maximum heat generator temperature All heating circuits and the hot water production adjust th
199. rn temperature limit for hot water loading eeeeeeeeeeeeeeeees 149 7 2 5 Hot water pre regulator with district heating systems 088 150 7 2 6 Mode of operation Hot water pre control cccceeeeeeeeeeeeeeeeeetees 151 EN2H 0221GE51 R0808 SDC DHC Contents 7 2 7 Quick hOl walercConurgl lt 24 2 22c22 tc Acne AME eee Ree 152 7 2 8 Mode of operation of hot water control mode external OP SRALOM eeaeee ee seSe sien Ee vecbaeuad eva e Ee eree AHE ER 154 7 2 9 Conditional parallel operation for mixed heating circuits 155 7 2 10 Circulation pump control Mode ccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 155 7 2 11 Switch off of district heating control ee ee eeeeeeeeeeeeeeeeeeeeeeeeee 156 72 12 Return interval MUSMING vsicestinsecdecutdenbecutdentecetdenteebcentenutcuntenetdentduusdente 156 7 2 13 Heat meter for additional limitation according to the volume flow or thermal output Jetted ls cated inte as cash caaheass dedaanutaahianetackanseae tart aars 156 7 2 14 Charging pump CHP ed fen la a La a Sa an Lan ca daa ca hand can daa cad band na 157 7 2 15 Primary pUMp sa deratnrndccntarsdisatataracatndadiaatatuinradadenasaatecatantanemninateitcateteas 158 7 2 16 Boiler circuit pUmMp asncdccncnbaaucnasnnn dete baguaneabsudeee sonnasaaabandcaibbaiupannbucdsaeaeees 158 7 2 17 Return INGIC ASO cee eens cc ue cause eu ere eel cleus Aue ae ave 159 2 41 21 Bypass PUM
200. rrection of the boiler temperature no longer occurs based on the measured temperature of the boiler sensor but rather based on the total flow sensor The boiler sensor still checks the boiler minimum and maximum temperatures of the heat generator Using a PI control algorithm the behaviour of the heat generator can be influenced by a deviation between the total flow setpoint temperature and the total flow actual temperature The PI controller can be influenced via three setting options P part Proportional part of the controller Sample time The sample time is a controller internal value which defines the time interval between two subsequent actuator pulses in the presence of a control deviation Adjustment The adjustment time determines the dynamic time behaviour of the controller based on the set sample time Important note for parameter setting The factor for the I part within the controller is related to the parameter setting values as follows Ki factor for the I part Ta sample time Tn adjustment time Ta Ki Kp Pon EN2H 0221GE51 R0808 225 Hydraulic Components SDC DHC Example Initial values e P part 0 5 K e Sample time 20 sec e Adjustment time 600 sec e Total flow setpoint w 68 C e Total flow actual value x 53 C 80 00 SVLF setpoint 60 00 4 SVLF actual TE OOP HHO 92D 0 2 o S oS g 97 OF O amp a 0 07 of oF 0 S Ni 2
201. rrelations Buffer control mode 1 2 3 4 5 6 Buffer demand from HC HW HC HC HW HC HC Heat generator BUFFER BUFFER BUFFER BUFFER BUFFER HC HW demand from HW HW HW Buffer control mode Load Load Dis Dis Load Dis charge 1 charge 1 charge 2 Buffer start up HC HW HC HC HW HC HC protection acts on Buffer discharge X X X protection Buffer frost protection X X X monitoring Buffer minimum X X X temperature monitoring Buffer maximum X X X X X X temperature monitoring Buffer forced HC HW HC HC HW HC HC HC HW dissipation into Buffer siphon function X x x Loading temperature HC HW HC HC offset acts from Heat generator start up X X X protection on buffer loading pump Buffer loading pump OFF OFF OFF OFF OFF OFF with no demand Buffer loading pump for ON ON OFF OFF ON OFF manual operation Buffer loading pump ON ON OFF OFF ON OFF function for sensor defect Buffer loading pump ON ON function for heat generator disable EN2H 0221GE51 R0808 205 Hydraulic Components SDC DHC Buffer control mode 1 2 Buffer loading pump function if heat generator is not available and buffer start up protection is active OFF OFF Buffer loading pump function if heat generator is not available and buffer start up protection
202. rs dimmers microwave ovens and televisions audio speakers computers cordless telephones etc is to be ensured x 40cm A minimum spacing of 40 cm is to be ensured between wall devices and central devices Multiple central devices in the data bus system can be mounted directly next to one another EN2H 0221GE51 R0808 SDC DHC Safety instructions The mains connection of the heating system boiler panel control equipment must be designed as a separate circuit Neither fluorescent lamps nor any machines which are potential sources of interference may be connected connectable b LEEA a Safety fuse 16 A b Boiler room emergency switch c Connect boiler room lighting and electrical outlets to separate circuits only d Wall devices e Heat generator Shielded cables must be used for the data bus lines For a recommended layout see 8 Technical data pg 250 EN2H 0221GE51 R0808 17 Safety instructions SDC DHC The earth connection of the cable shielding must occur on one side at the protective conductor connection e g at the cladding plate of the heat generator protective conductor terminal etc Multiple earth connections of a single cable are not permissible buzzing loop L a No earth connection here b Central device EN2H 0221GE51 R0808 SDC DHC Safety instructions EN2H 0221GE51 R0808 With star topology data bus systems double earth
203. ry Mode of operation of hot water control mode external operation If the energy supply for hot water loading is not provided through the district heating valve no hot water demand may be sent to the heat generator The following setting needs to be selected for this case Hot Water Circuit menu parameter 07 Hot Water Circuit control mode 7 external operation The hot water pre control is part of the hot water loading Consequently the request from storage control is forwarded to the hot water pre control which acts according to its function In the Hot Water Circuit External Operation control mode the setpoint value from the hot water pre control is not forwarded to the energy management unit or the district heating valve EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 2 9 Conditional parallel operation for mixed heating circuits This function is only realised for district heating controllers Additional setting in the Hot Water menu parameter 07 Hot Water Circuit control mode 8 priority with enabling of mixed heating circuit control operation Function Function as for hot water priority operation setting 2 with the difference that mixed heating circuits mixed heating circuit control constant control fixed value control can still adjust to their setpoint During an active hot water loading the heating circuits do post a setpoint value to energy management Mixed heating circuits
204. s Below a set outside temperature the heat pump first heat generator is then disabled but the supplementary heater second heat generator remains enabled e f no inverse outside temperature disable was configured Heat Generator menu parameter 38 OFF a configured outside temperature disable Heat Generator menu parameter 25 occurs on both heat generators e fan inverse outside temperature disable was configured Heat Generator menu parameter 25 not OFF the inverse outside temperature disable acts on the first heat generator stage 1 and the outside temperature disable acts on the second heat generator stage 2 A separate boiler sensor BS2 must be configured for the second heat generator EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 10 7 3 10 1 Function 7 3 10 2 NOTE Function 7 3 10 3 NOTE Function EN2H 0221GE51 R0808 Other system components Global fault message input Activating this function causes the corresponding input to act as a switching contact With the contact closed short circuited the fault message input is treated as an additional fault in the control system Intruding fault messages can thus be forwarded via the data bus or taken into account via an additional fault message output Up to three different fault messages can intrude via variable inputs Global fault message output This function must be activated in the Hydraulics menu
205. s of this system f FOR a Boiler b Hot water tank 223 Hydraulic Components SDC DHC The following components are connected to the first controller with bus address 10 Outside sensor Stages 1 and 2 of the burner Boiler sensor Tank sensor Tank loading pump Mixed heating circuit pump mixed heating circuit open closed and flow sensor of heating circuit 1 Mixed heating circuit pump mixed heating circuit open closed and flow sensor of heating circuit 2 The following components are connected to the second control device with bus address 20 Mixed heating circuit pump mixed heating circuit open closed and flow sensor of heating circuit 3 Mixed heating circuit pump mixed heating circuit open closed and flow sensor of heating circuit 4 Example 2 Heating system with a two stage heat generator two mixed heating circuits and two industrial water loadings used for example for a duplex with one heat generator The following diagram shows the hydraulics of this system a Boiler b Hot water tank 224 EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 11 2 9 Correction of the heat generator after the total flow temperature Total flow sensor The sensor connected to variable input 1 2 3 measures the total flow temperature in thermohydraulic distributors or in the common flow Co
206. sarily interrupt heating and increase the temperature in the hot water tank Depending on the parameter setting a setpoint present in the system may or may not be forwarded to the heat generator during the extended running time The boiler is operated according to the following rules during a tank pump extended running time Parallel hot Hot water Conditional hot water peration priority mode water priority mode DC MC HC setpoint HC setpoint setpoint setpoint AUTO Active OFF OFF Active OFF OFF OFF OFF OFF For complete loading of a hot water tank by means of automatic measuring point switch over between tank sensors 1 and 2 layer loading The measured value of the hotter sensor SF1 or SF2 is evaluated for the activation of the loading pump Termination of loading is carried out on the basis of the measured value of the colder sensor The set values for the hot water setpoint temperature and the specified hot water switching differential continue to apply 5 2 4 DHW menu pg 77 Quick hot water connection in cascaded systems With cascaded systems it is often the case that all heat generators are often not needed for hot water production In addition the required heat generators must be connected faster than when heating If there is a demand for hot water a fixed value of 10 seconds is used for connection of the subsequent stages up to the set maximum stage number for quick hot water con
207. se load increase 0 60 K 27 Minimum temperature limit of heating circuits only if parameter 02 3 5 C to setting value of parameter 03 36 28 Switching differential of minimum temperature limit of heating circuits only if parameter 02 3 2 20K 102 EN2H 0221GE51 R0808 SDC DHC Operation Para Designation Setting range Setting values Factory Setting meter setting 29 Heat generator OFF OFF forced discharge 4 Discharge to process water tank 2 Discharge to heating circuits 3 Discharge to buffer tank 30 OEM maximum Setting value of parameter 03 to 110 limit 130 C 31 Full load OFF 0 5 to 10 OFF regulation 34 Power limit for 50 100 100 heating 35 Power limit for hot 50 100 100 water 37 Burner counter AUTO AUTO mode counter of 1 Feedback only operating hours 2 Free counter 38 Outside OFF 20 to 30 C OFF temperature lock inverse RESET Resetting of burner SET by pressing the input button ST 1 start counter and operating hours of stage 1 not if parameter 01 OFF RESET Resetting of SET by pressing the input button ST 2 burner start counter and operating hours of stage 2 not if parameter 01 2 or 01 OFF EN2H 0221GE51 R0808 103 Operation SDC DHC OEM 5 4 7 District hot water menu DIST HEATING The parameters in this
208. sible If an SDW 10 SDW 30 room sensor is connected it always has first priority In this case the NTC 20 room sensor has no effect With operation via a connected SDW 30 room sensor with no effect an NTC 20 room sensor can be combined with a variable input With an NTC 20 room sensor connected all room functions of the heating circuit are in effect Direct Heating Circuit Mixed Heating Circuit 1 or Mixed Heating Circuit 2 menu parameter 4 active In conjunction with the NTC 20 room sensor this means a shift of the controller software to the central device The configuration of the room controller with NTC 20 room sensor operation occurs via additional parameters in the central device menu trees DC MC1 MC2 The room controller in the SDW 30 functions as before Room control in conjunction with SDW 10 is not possible Heating circuit bus authorisation This setting serves to determine the authorisation status of a room station connected to a heating circuit One parameter per available heating circuit is available for this setting Simple access authorisation Only switching times and parameters of the specific heating circuit concerned can be read and modified On call up only the information for the heating circuit concerned are displayed to the respective user operator Tenant status 231 Hydraulic Components SDC DHC Application NOTE 7 3 12 7 3 12 1 Function NOTE 232 Extended access au
209. side temperature With a larger heating surface such as with floor heaters the heating curve has a less extreme slope than with a smaller heating surface e g radiators The set value refers to the lowest outside temperature used for heat demand calculation This parameter is to be set by the technician and should not be altered anymore The setting of the heating curve should be carried out only in small steps and at adequately long intervals so that a stable condition can be set We recommended making any corrections in 0 1 0 2 steps after 1 2 days EN2H 0221GE51 R0808 SDC DHC Hydraulic Components NOTE Setting EN2H 0221GE51 R0808 A ATTENTION To measure the room temperature the heating circuit of the most occupied room is to be used Radiator thermostat valves are used together with correctly designed radiators to control the external heat gain and should hence be almost completely open During the adjustment phase additional external heat sources like fireplaces majolica stoves etc should not be used Furthermore during the measurement period excessive ventilation is to be avoided to prevent external cold from interfering with the adjustment process The measurement period covers basically the heating phases If the heating curve is correctly set the room temperature remains constant according to the set daytime setpoint regardless of the changes in the outside temperature If an automatic
210. sor connection to variable input VI1 VI2 or VI3 Control modes based on the switching state of the modem AUTO automatic STBY standby HEAT continuous heating RED continuously reduced Solar heating capacity VO1 2 configured as solar tank loading pump Solar loading pump at variable output Solar heat balance VO1 2 configured as solar tank loading pump Solar loading pump at variable output Switch ons Solar loading pump VO1 2 configured as solar tank loading pump Solar loading pump at variable output Operating hours Solar loading pump VO1 2 configured as solar tank loading pump Solar loading pump at variable output EN2H 0221GE51 R0808 43 Operation SDC DHC 5 1 2 8 5 1 2 8 1 _ SERR D ay a AA i c JR CE DARAAALALDS Cia O hee CO Application NOTE Cancellation 44 Manual mode Emission measurement button Manual mode If this button is pressed and held longer than 5 s in the basic display the controller is switched to manual mode In this operating mode the required heat generator temperature is specified manually with the input button respective heating need A controller set to manual mode has no effect in heat circuit expansion according to the The heat generator setpoint is set between the minimum and maximum heat generator temperatu
211. ssigned to the circulation pump function for example If a variable function requires an input value sensor then this sensor will be assigned to the matching variable input This input can then no longer be changed manually If individual settings were previously made for the associated input they are overwritten and the corresponding functions are reset Example A second outside sensor is assigned to variable input 1 The buffer loading pump function is now assigned to variable output 1 The variable input is now reset automatically outside sensor 2 no longer active The buffer sensor is then assigned to it as it is required for correction 115 Control Functions SDC DHC 6 1 1 Connection and settings table Function Adjustable Inputs Comment at output Fixed Optional assign VI 1 2 ment DHW loading SLP SF Fixed sensor input Direct heating circuit DKP MK 1 controlled by weather MK 2 conditions Mixed heating circuit MK 1 MK 2 VF1 Fixed sensor input for respective controlled by weather VF2 mixed heating circuit conditions Circulation pump SLP DKP VA1 VA2 Electric heating rod SLP DKP VA1 VA2 Constant control DKP MK 1 VF1 Sensor for connection to MK MK 2 VF2 Fixed value control MK 1 MK 2 VF1 Sensor for connection to MK VF2 Boiler return control MK 1 MK 2 VF1 VF2 Bypass pump VV
212. stage all other automatic stokers are enabled to 100 power full load after another progression of the dynamically determined switch on delay at least 5 min If the system is operating with all available stages no power limit is active for the automatic stokers If a level is reduced the set switch over power for the automatic stokers is once again in effect 235 Hydraulic Components SDC DHC Function 7 3 12 3 5 Manual mode Emission measurement 236 Grouping for base and peak loads ANF118 V2 2 specifications High quality expensive condensing boilers are used for the base load especially with gas systems During cold months low temperature boilers are used for covering peak loads It is necessary that an activated stage reversal only affect the base load boiler here The peak load boilers are excluded from the stage reversal The configuration defines which peak load heat generator is the first one all heat generators with addresses greater than or equal to the setting The time based stage reversal see Cascading menu parameter 05 only affects the connected base load boiler smaller address setting The first peak load boiler is not switched on until the base load boilers are operating at 100 If grouping was carried out via the configuration and the peak load boiler was in demand a change of the leading group can be activated via a parameter If this parameter is set to ON the group o
213. such as PARTY or ABSENT are skipped here See 5 1 2 5 Operating mode button basic display pg 26 Short absence while heating operation is active EN2H 0221GE51 R0808 SDC DHC Operation Cancellation Factory setting Setting range Display Setting Application EN2H 0221GE51 R0808 An active absence program can be cancelled in case of early return gt Press button gt Turn input button and switch to automatic operation The active absence program has been cancelled P1 as from activation P1 P2 P3 0 5 to 24 h to the current time P1 P2 P3 Program controlled resumption of heating operation After activation of the absence program heating operation is interrupted until the following switch on time of the current automatic program P1 or P2 or P3 if enabled 0 5 24 h The set value is added on to the current time and represents the return time When the absence program is called up again the last set value is saved and suggested as the initial value An active absence program appears in the basic display with information on the return time Party mode short term program Party mode causes one time intermediate heating of all heating circuits up to a specified point in time and bridges an upcoming or already active absence cycle totally or partially Once the set time expires the heating circuits automatically return to the operating mode that was active before
214. syo ounjyesoduay wnwixe WNWIUI Mates jo juawubissy Buneey pexiw 6 d d julodjes E dwnd 09419 Bupe y jo pu eunyesedwe yuu anes dwa A Josuas apisino n119 jo aw dn mojjo4 2S4 mes dw winwixey WWINWIUI MEU Jo juawubissy Buneay z awl EATEN STAeS cA ak asned we6oid ew Buluund NOJO Jaye pelea dund uogenoo jeaseyu wouoos aw Buluoyms papue xe dwnd joy jo jenualeyjip 19 eM JOH Buiinp soyesoueb Jeasajur Wwouoog j dund uojejno dwnd uoyjejnaig Bupeoj 18 em OH Buiyoyms IPAL 10 INOMPUAQ g a pow jqeu aradi ueloluyos Buneay uolouny s ess w uogoun enna enema adhb Jeyawesed wash uolo9 01d S0J4 aunyesodiuay ajoA_ Jo apood Huly907 yes onewoyny yney jeo1607 Buryoojq nuy uoneinbyuod ynos Buyeay pexiw eja eseaJoUl g indur aiqeue sonespAH uJn a1 99J1 PU i q Burwwesboig 6l gl L gL SL vi e zi LL ol SEa EN2H 0221GE51 R0808 50 Operation SDC DHC uoljeiqijes 1osues soBbessaw ine yeseyy OZ e6essew yne4 Z sobessow yne4 suonouny 393S 389 Aejay snq eq Buipesseg 101 U09 MOY 0 L sayng 1 N4 pllos ejos se lul uInzJ yY Buyeey 3914S syed jo1 u09 syn 119 Bulyeay uoeusnSyuog THARF Buiyoyms yw aunyesoduue aigesip aBseyosip p2J0 ywy eunjesoduey WNWIUIL bosyo peo aseg sinjeieduiey J mod Suun wpun u ew zu auysnfpe 2 wy jdwes 4oyesauab yea Joyerauab yeay wnwiuju yinouio Bup
215. t water demand to the heat generator It can be connected through variable settings at one of the variable outputs or at the direct circuit pump output A charging pump connected to the central device under address 10 will run as soon as any demand is present on the data bus including all heating and hot water circuits within the control network A charging pump connected to an extension controller address 20 30 50 runs only on demand from the heating circuit associated with the respective control device To avoid a high temperature safety switch off of the heat generator a charging pump is switched off according to the set time delay when a request to the heat generator is withdrawn 5 4 1 Hydraulics menu HYDRAULIC Pg 81 157 Hydraulic Components SDC DHC 7 2 15 NOTE Function Bus system Primary pump extended running time 158 7 2 16 NOTE Function Boiler circuit pump 2 Primary pump Function only active if the PRIMARY PUMP function was assigned to one of the outputs variable output 1 or variable output 2 in the Hydraulics menu The primary pump is the functional equivalent of a loading pump It is only active when heating demand to the heat generator is present Hot water requests are not considered A primary pump connected to the central device under address 10 will start up as soon as any request is present on the data bus including all heating and hot water circuits with
216. tching differential OFF Heat generator cycle disable Anti blocking function 7 3 7 EN2H 0221GE51 R0808 If the temperature in the solid fuel boiler rises above the set maximum temperature limit the solid fuel loading pump is forced to switch on The excess heat is then dissipated into the preselected circuits see Buffer Tank menu This forced dissipation will be cancelled and the temperature differential control enabled when the solid fuel boiler temperature undershoots the maximum limit by more than 10 K If the temperature in the solid fuel boiler rises above the current temperature in the buffer tank by at least the set amount the solid fuel loading pump is switched on and the buffer tank is loaded Prerequisite The temperature of the solid fuel boiler is at least 10 K over the minimum temperature limit The min set value is 3 K above the switch off differential If the differential between the solid fuel boiler and buffer tank temperatures is less than the set amount the solid fuel loading pump is switched off and loading is interrupted The max set value is constantly 3 K below the selected activation difference in order to prevent rear discharging of the buffer tank Heat generator solid fuel cycle disable The solid fuel cycle disable serves to prevent frequent switching between loading through the solid fuel boiler and loading through a conventional oil gas heat generator After the solid fuel loading pu
217. tection is disabled pumps are switched on again when the buffer temperature exceeds the buffer minimum temperature plus half of the buffer switching differential All consumer circuits remain in operation when buffer start up protection is switched off With operation in conjunction with buffer tanks the hydraulic conditions for each buffer control mode deviate from this Special considerations must be made regarding boiler start up protection for this reason Buffer start up protection can be switched off Buffer discharge protection disables the buffer loading pump until the heat generator temperature has risen to more than 5 K above the buffer setpoint temperature This function helps prevent rear buffer discharge though the heat generator The buffer loading pump is disabled again as soon as the temperature differential between the heat generator and the buffer tank has dropped to less than 2 K For operation without buffer tanks tank discharge protection Hot Water menu parameter 08 acts on the heat generator The heat generator sensor and the hot water circuit sensor are compared EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Depending on the activated buffer control mode activated tank discharge protection must act on the buffer instead of the heat generator The required conditions can be seen in the following table Buffer control mode 1 2 3 4 5 6 Tank discharge Buffer Heat Heat Heat
218. ted to the maximum heat generator temperature All heating circuits and the hot water production adjust their setpoint to the respective maximum temperature A ATTENTION There is danger of scalding because the hot water temperatures may rise above the setpoint temperature Emission measurement via chimney sweep EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Cancellation Safety check Function Te a aL Ls 4 sa ia 4 gt 4 Application Cancellation 7 3 13 3 Function Heat generator EN2H 0221GE51 R0808 Emission measurement can be terminated at any moment in advance with the key Safety temperature limiter check may be performed only by the technician By keeping the input button pressed during an emission measurement the integrated heat generator maximum temperature limit is bypassed and the heat generator remains in operation continuously until the safety temperature limiter STL is triggered During the safety temperature limiter check all the consumers are separated from the heat generator i e any available mixed heating valve is closed and all the heating and hot water loading pumps are stopped The emission measurement is continued from the moment of termination with the previously saved remaining time Safety temperature limiter check by the heating technician Release the input button The emission measurement still active is stopped with the key
219. the HEATING CURVE and DESIGN TEMP parameters in the following connection Ty Norm 20 C T i Norm S 20 C Norm This means that the value of the respective other parameter changes accordingly EN2H 0221GE51 R0808 SDC DHC Control Functions 6 8 7 NOTE Function EN2H 0221GE51 R0808 The display for the heating curve adjustment occurs in combination i e the design temperature bottom right and the slope bottom left are displayed and set in one display Both flash during adjustment The parameter display above is still HEATING CURVE The jump occurs via the Direct Heating Circuit or Mixed Heating Circuit 1 Mixed Heating Circuit 2 menu and the heating curve parameter Summer switch off This function is only effective in control mode AUTOMATIC For higher outside temperatures normally above 20 C it does not make sense to keep the heating on in the building You can thus choose to switch off heating depending on the outside temperature according to the following criteria Outside temperature rise A switch off is initiated when the mean outside temperature exceeds the set value T C 23 0 ee eee 8g g E g g g g g g g g g E g g g g ge Bg 2 a bsd kd 2 a kod a k 2 2 id ka a 4 4 cd a 4 2 2 g a pd Q 6 A 6 Ff g A 6 amp amp 6 F A H F FH R S AA e 5 8 S 6 8 aad 8 FSF FS fF fF FS fF fF fF fF FSF GF N KN A SE Current outside temperature c Summer switch off on
220. the set maximum temperature limit EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Buffer temperature offset of heat generator Buffer switching differential Buffer forced dissipation Set value NOTE EN2H 0221GE51 R0808 To ensure an adequate control reserve for all consumers connected to the buffer tank the demand value sent to the heat generator can be raised by an additional temperature offset If the buffer tank temperature rises above the current demand value by the set amount the buffer loading pump is switched off The pump is switched on again as soon as the buffer tank temperature drops below the current demand value If the set buffer maximum temperature limit is exceeded the excess energy can be dissipated into the heating circuits and the hot water tank The heating circuits into which the forced dissipation is routed are determined by the respective parameter OFF No heat dissipation Tank loading pump with provision tanks only Dissipation of the excess heat occurs to an existing water heater ATTENTION Use a thermal mixing valve in accordance with the regulations as there is a risk of scalding Heating circuit pump s Any excess heat is dissipated into the heating circuit s The set maximum temperature is not exceeded here The intended room temperature may be exceeded for short periods Activate the thermostat function in conjunction with room station s ATTENTION W
221. thorisation This authorisation status allows access to all heating circuits and to the hot water circuit and their parameters and switching times within the respective central device Landlord status Once a wall device is connected and registered via the data bus to the central device the central device automatically switches to remote operating mode This is necessary to ensure clear operation of the system with connected wall devices Cascading of heat generators in the bus system General description of cascading of control devices In its standard version the control system features the possibility to couple and cascade several boilers The cascade control is independent of the type of heat generators to be combined For instance condensing boilers can be easily combined with atmospheric gas boilers The system automatically recognises a cascade by checking if several central devices have programmed a heat generator or if more than one condensing boiler is connected to a central device In cascade operation an additional cascade selection level is displayed for handling the parameters in the central device assigned to bus address 10 Cascade operation excludes 2 stage boiler control All available stages are operated by the cascade management Consequently the respective parameters of the Heat Generator menu are not available All control is now governed by cascade control EN2H 0221GE51 R0808 SDC DHC Hydraulic Componen
222. thus the heating circuit can heat up faster 173 Hydraulic Components SDC DHC 174 Parameter 46 pre heating time at 0 C By setting the quick heat up time at an outside temperature of 0 C the heat up speed affected This value is included in the calculation of the pre heating time Pre heating time pre heating time 0 C 20 C x room setpoint outside temperature Parameter 47 lowering ramp This parameter setting specifies how fast the temperature is reduced before the end point of the heating cycle is reached e g 10 p m Switch on optimisation with room sensor adaptation a Calculation via the b min pre heat time controller c max pre heat time Switch on optimisation without room sensor EN2H 0221GE51 R0808 SDC DHC Hydraulic Components 7 3 4 5 Setting range Function Application NOTE 7 3 4 6 Function EN2H 0221GE51 R0808 a Calculation by the b 21 C parameter 45 without controller based on the room sensor outside temperature C Pre heat time at 0 C Room setpoint ramp OFF 0 5 60 K h This function is only active in conjunction with an RC room controller function The set value acts as a filter between the setpoint jump change of the room setpoint temperature setting and the room setpoint at the controller output The ramp functions as an artificial down time on the control path and slows heating cooling Configuration of th
223. time can be determined through the Ziegler Nichols method The mixed heating circuit is closed initially and the heat generator is taken to the maximum temperature for the heating circuit concerned As soon as half of all consumers at the circuit to be measured have been opened the mixer is fully opened from cold condition room temperature by means of the relay test function The heat up curve i e the temperature progression over time following this action shows an inflection point The crossing of the tangent through that point and the time axis is the delay time This value multiplied by the factor 3 3 is the optimum integral action time for this heating circuit Xx 100 A 90 4 80 4 70 4 2222 222 neon n nee epee ees 60 4 50 4 20 40 60 80 10 12 EN2H 0221GE51 R0808 183 Hydraulic Components SDC DHC 184 7 3 4 10 1 3 7 3 4 10 1 4 Application Adjustment time Floor heating and other static heating surfaces 10 30 min Radiator heating 6 10 min Convector heating 3 6 min Sample time Ta The sample time is a controller internal value which defines the time interval between two subsequent actuator pulses in the presence of a control deviation Shorter sample times allow finer adjustments Actuator runtime This function allows adjustment of the actuator with regard to its finite runtime to the control characteristics meaning that
224. tion OFF protect protection day Mon to Legionella protection on ion day Sun specified day of week ALL Legionella protection every day 03 Legionella 00 00 23 00 hours 02 00 protection time 04 Legionella 10 C to setting value of 65 protection parameter 06 temperature 05 Transducer for hot 1 Hot water circuit 1 water circuit temperature sensor 2 Hot water circuit temperature controller thermostat 06 Maximum 20 C to heat generator maximum 65 temperature limit temperature for hot water circuit if parameter 07 7 20 to 90 C In automatic mode from hot water circuit minimum temperature EN2H 0221GE51 R0808 89 Operation SDC DHC Para Designation Setting range Setting values Factory Setting meter setting 07 Hot water circuit 1 Parallel operation 2 operating mode 2 Priority operation 3 Conditional priority 4 Parallel operation based on weather conditions 5 Priority operation with intermediate heating Priority isolating circuit External operation Conditional parallel operation for mixed heating circuit DHC only 08 Tank discharge OFF No discharge protection ON protection ON Discharge protection activated 09 Temperature in 0 50K 15 crease of neal Difference between hot water generator with hot circuit charging temperature and waret oreur hot water circuit setpoint charging temperature 10 Switching 2 20K 5 eine rental of hot Value of hot
225. tive operating mode symbol at the same time In operating mode 1 the set value for all heating circuits is the same In operating mode 2 the set value applies for the respective heating circuit To set the operating mode see 5 2 3 3 Operating mode pg 74 gt Press button gt Select operating mode by turning the input button The marking is located above the corresponding operating mode symbol gt Confirm set operating mode by pressing the button or the input button gt With short term operating modes ABSENT PARTY set the desired value by turning the input button and confirm with the button or the input button Alternative Automatic acceptance of the value after the set information time see 5 1 2 7 System information button pg 35 Press the button for approx 3 s to return to the basic display from any operating level Holiday mode is set via the Switching time programs Holiday programs button see 5 1 2 6 Switching time programs Holiday programs button pg 33 Absence mode short term program With the ABSENT operating mode heating operation is temporarily deactivated and protected from frost during brief absences During the absence all heating circuits are adjusted to the specified lowered room temperature Once the set time expires the heating circuits automatically return to the operating mode that was active before the switch to the absence operation Short term programs
226. tomatic program P1 P2 P3 of the source day is copied in the display with the time switch symbol and the program index to select the source day MO to SU to be gt Press input button to confirm the source day The source day appears flashing gt Turn input button to select the following setting values and confirm by pressing the input button e The following target days Mo to Su individually e All days of the week 1 to 7 as a week block e All weekdays 1 to 5 as a weekday block e The weekend days 6 to 7 as a weekend block Acceptance is confirmed by acknowledging DAY COPY OK After acknowledgement the following target days appear one after another automatically with each additional press of the input button and can be skipped and accepted if necessary Pressing the lt button causes an immediate return to the basic display Only complete days with all cycles and temperature specifications and the respective program can be copied 63 Operation SDC DHC 64 5 2 2 4 3 2 Source circuit Target circuit NOTE Copying switching time programs heating circuits Block programming also enables the copying of all switching times and temperature specifications of a heating circuit to another heating circuit Calling up the copy function heating circuits See flowcharts on pg 65 gt Press input button to confirm the copy function gt Turn input but
227. ton lt gt to select the source circuit to be copied HC MC 1 MC 2 DHW If automatic program P1 P2 or P3 see System Parameter menu PROGRAM parameter P1 to P3 was enabled the desired switching time program P1 P2 or P3 of the source circuit can be selected If not enabled program selection is skipped gt Press input button 3 to confirm the source circuit Based on the same chart the desired target circuit and if enabled the desired program can be selected and accepted Acceptance is confirmed by acknowledging COPY OK The copy function is then called up again to copy additional circuits if necessary Heating circuits cannot be copied to hot water circuits or the re verse due to the different temperature specifications If a heating circuit HC MC 1 MC 2 is selected as the source circuit the hot water circuit DHW switches off as the target circuit A hot water circuit as the source circuit is also the target circuit In this case only switching time programs P1 to P3 are copied among one another Pressing the lt button causes an immediate return to the basic display EN2H 0221GE51 R0808 SDC DHC Operation Block programming The copy function enables a source day to be copied to any target days or to all days of the week week programming All cycles of the source day are copied Individual heating cycles cannot be copied GPola Select Dea AE Gee heating circuit HC MC
228. ts 7 3 12 2 Switching differential Connection delay Deactivation delay Stage reversal Guidance stage NOTE EN2H 0221GE51 R0808 Function of the cascade parameters Each heat generator has its own switching differential The cascade switching differential must be set in such a way that it is always larger than the switching differential of any individual heat generator The afterheating characteristics of the boilers used must be taken into account when rating the heating system The cascade switch on delay is used to adjust the system to the start up delays of the individual boilers When does the heat generator deliver its energy into the system after being switched on start up phase pre running time The appropriate setting is the maximum delay time of the boilers in the system To prevent all heat generators switching off simultaneously if the set cascade switching differential is exceeded the run down of heat generators is controlled by the switch off delay The setting has to be adjusted to the afterheating characteristics of the heat generators To ensure the balanced utilisation of the heat generators within a cascade a runtime dependent leading stage swap can be activated After the set operating time of the presently leading heat generator has passed the system switches to the heat generator with the next higher bus address Stage swap can only be executed between several central devices It cannot
229. ues between 1 25 and 1 35 CONV Progressive heating curves for convector and baseboard heating RAD radiator systems UFH floor heating with mixed heating circuits UFH RAD CONV Error messages A ATTENTION Inform the heating technician whenever any fault messages are output The control device contains substantial error notification logic The error messages appear in continuous alteration with the basic display Multiple errors that occur at the same time appear one after another in the order in which they occurred The following types of error message exist Sensor measured values that do not lie in the measurement range are evaluated as an interruption or short circuit They appear depending on the type and allocation with fault code 10 to 20 and index 0 for short circuit or 1 for interruption These error messages evaluate the respective switching status They appear depending on the type and allocation with fault code 30 to 40 and index 0 1 or 2 EN2H 0221GE51 R0808 SDC DHC Operation Logical error messages Bus error messages 5 4 5 4 1 These error messages evaluate the control result to be expected They appear depending on the type and allocation with fault code 50 to 60 and index 0 1 or 2 These error messages refer to address faults such as double issuance or non recognition of address settings on the data bus They appear with fault code 70 and index 0 or 1 depending on the type and ass
230. uit Mixed heating circuit 1 Mixed heating circuit 2 Hot water heating circuit Heating cycle 59 Operation SDC DHC 60 Default switching time program P1 for heating and hot water Uniform continuous heating and hot water operation on all days of the week Default program P1 Heating circuit Day Heating operation from to Heat generator heating Mo to Su 6 00 22 00 circuit Hot water circuit Mo to Su 5 00 22 00 Mixed heating circuit 1 2 Mo to Su 6 00 22 00 EN2H 0221GE51 R0808 SDC DHC Operation Switching time programming program P2 and P3 enabled Upon accessing the menu selection level the Timeprograms menu always appears first Enabling of programs P2 and P3 in the System Parameters menu see 5 2 Menu selection level pg 48 Select ai 0 2 eee heating circuit HC MC 1 MC 2 DHW i nae i pee G Select program Select day and cycle Change Only appears if there are switching times in the second heating cycle Change Return PE Change E Temperature PE Return to the basic display HC Direct heating circuit MC 1 Mixed heating circuit 1 MC 2 Mixed heating circuit 2 DHW _ Hot water heating circuit Hcy Heating cycle EN2H 0221GE51 R0808 61 Operation SDC DHC Def
231. uit are overwritten by individualised switching times and temperature specifications This is especially advantageous if correspondingly adapted heating programs are to be created in case of periodically recurring assignments with different assignment times e g shift work Max three heating cycles each with a switch on and switch off time are available for each day of the week for programming switching times Each heating cycle can also be combined with a freely selectable temperature specification The default programs are not lost when overwritten by individually created programs Individualised programs however are deleted when default programs are reloaded and must be recreated For this reason individualised switch on switch off times and temperature specifications should always be entered in the tables provided for this purpose see 9 Log pg 254 Press button Returning to the basic display takes place by pressing the button or automatically after the set information time see 5 1 2 7 System information button pg 35 55 Operation SDC DHC ivyveey EARAIL 5 2 2 2 5 2 2 3 56 Selection of the control circuit After accessing the Timeprograms menu the desired control circuits can be selected with the input button sequence in the following e Direct heating circuit HC e Mixed heating circuit 1 MC 1 e Mixed heating circuit 2 MC 2 e Hot water circuit DHW
232. unction 15 Locking code for OFF 0001 to 9999 1234 heating technician 16 Type code Controller type corresponding to Type type code table 18 Cycle temperature OFF Cycle temperature ON enable disabled ON Cycle temperatures enabled 19 Frost protection OFF Continuous frost OFF mode protection as per parameter 05 0 5to Cyclic operation 60 min EN2H 0221GE51 R0808 87 Operation SDC DHC Para Designation Setting range Setting values Factory Setting meter setting 21 Adjustment of the 10 10 s 0 real time clock RTC 23 Locking code for OFF 0000 9999 OFF operating level 25 Cooling switch on 2 10K 6 temperature 28 Error memory 2 OFF ON OFF 29 Characteristic 50 to 30 C 0 curve for emergency operation without outside sensor Selec Selection of SDC DHC SDC tion of SDC DHC SDC DHC Para Parameter reset SET by pressing the input button meter reset 88 OEM Other controllers also allow other language variants EN2H 0221GE51 R0808 SDC DHC Operation 5 4 3 Hot water circuit menu DHW This menu contains all parameters required to program the hot water circuit except the switch time programs Para Designation Setting range Setting values Factory Setting meter setting Hot Hot water at night 10 C to normal hot water 40 water temperature Legio Legionella OFF No legionella protec
233. ure 147 149 Room connection 169 Room factor 170 Room frost protection limit 177 Room influence 169 Room sensor 169 170 Room setpoint ramp 175 Room thermostat function 181 S Screed function 165 Selection level 48 54 59 61 72 Selection of parameter presettings 119 Sensor calibration 249 Solar Anti blocking protection 199 Collector maximum temperature limit 196 Function 196 Heat balancing 198 Heat capacity 199 Heat generator cycle disable 197 Minimum runtime of loading pump SOP 196 Priority mode 197 Priority parallel switch over 198 Resetting heat balancing 198 199 Switch off differential 196 Switch on differential 196 Tank maximum temperature limit 197 Solid fuel EN2H 0221GE51 R0808 Function 212 Solid fuel Minimum temperature 212 Solid fuel Maximum temperature 213 Solid fuel Switch on differential 213 Solid fuel Switch off differential 213 Solid fuel Anti blocking protection of solid fuel pump 213 Summer switch off 123 Switching differential 132 Switching differential II 132 Switching times 73 Switch off optimisation 171 Switch on optimisation 171 173 174 System frost protection 124 T Tank discharge protection 190 Tank loading switch over 213 Tank sensor 2 192 Temperature displays 37 Temperature limit 164 Temperature measurement 188 Temperature offset 165 Time delay stage Il 134 Timer 217 Total flow sensor 225 V Variable inputs and outputs 114 119 25
234. uyesy pexiyy Burjeay aq Joyesauab yeay ail eee sig gsr se iae az q Pno q aoinap euo q eea Bujesy p XIN Bujesy p XIN 6une y yaq Buidnoi6 sgouenbas POSE IM peo seq obeys soueping Jesuane1 aBejs abeys jo Ayloedeo Aejap yo yoymsg Aejap uonoauuog IESER Buipesseg 1 em 04 JINO PEN abels peoj je d i 5 j Bulyoyims z JO 18A0 YOUIMS 49A0 YOUMS uojeinBoy uoyeinBoy 01 U09 MOY 2 0 1 a oe enuas syo uo109 01d uo1 09 01d JeUsJEYIP yo Jenuaieyip eBseyosip peoio4 en Hip S ms dwa xey aunyesoduua uly ng abueyosip saying dn yejys saying uoyms dn mojjo4 uo YouImg Buryoyms Jeyng eunyeleduie 13 109 E a EA La ee ainyesadwie xey myesadwa ul jeny Joyesoueb yeay J0 YoIMS UO YOIMS ainyesodwia Smags seule enuas y enuas avuejeq 3eoH 48A0 YO IMS qes p 2949 pow Jo1jU0D ey wnwxew wnwuiwu dund EEO EEES ejos jaljesed Ayoud Joyesauab yeay OST Ne OUTS Joya 109 Supeo ejos Bee ise gic duuind egua Ieee SERN INR O a ae mes dw asealoul uIN J Y synoujo Buyeey y g 1104 i MS winjoy uoneinByuog smyes dw 3AE JUIOd as 6 julodjes 6 r d z nen Buneoy KANEA otis alu zu w snfpy was winWIUILU AJLA mes dw JeSHO Buyesy jo14SIq PARIR SIAKOL A TET 94 S p Jo wyuny S a a Moy AMT Meas Buyesy joujs MO WNWIXE rates uma xen VAS ge y Pusia 4 xen lenuereyip yenuesayip wyun pow ywy wnwxew smes dwa uu aunyesodwia CAER ET ieusi yeoy 10 u09 J0SU S JO pow ywq winwixey WwnwIul Bulyoyi
235. voltage supply to the control equipment Observe the local regulations regarding grounding and zeroing As soon as the mains voltage is applied to terminals 21 22 2 6 12 and 18 headers X3 and X4 can also carry mains voltage If the heating circuit and hot water loading pumps do not have an On Off switch but manual switch on and switch off capability is still desired the appropriate switches must be installed by the customer All accessory parts Sensors selectors etc are to be connected to the respective circuit diagram Maintenance and cleaning The controller is maintenance free The device can be cleaned externally with a moist not wet cloth EN2H 0221GE51 R0808 SDC DHC Safety instructions EN2H 0221GE51 R0808 2 6 Safety precautions for EMC compliant installation Mains lines and sensor data bus lines must be installed separate from each other A minimum of 2 cm space must be present between the lines It is permissible to cross lines a Mains 230 V AC x 15cm b Data bus line 12 V AC y 2cm For control devices with their own mains connection separate installation of mains and sensor bus lines must absolutely be ensured If cable ducts are used they are to be provided with cut off bridges Safety instructions SDC DHC When installing control or wall devices a minimum spacing of 40 cm to other electrical equipment with electromagnetic emissions e g relays motors transforme
236. y means of the rotating encoding switch on the inside of the wall device in accordance with the following table Address CU address Assignment 0 Undefined Undefined 1 10 CU 1 Direct heating circuit 2 10 CU 1 Mixed heating circuit 1 3 10 CU 1 Mixed heating circuit 2 4 20 CU 2 Direct heating circuit 5 20 CU 2 Mixed heating circuit 1 6 20 CU 2 Mixed heating circuit 2 EN2H 0221GE51 R0808 SDC DHC Hydraulic Components Current room temperature sensing Control mode selection Automatic mode Heating Reduction EN2H 0221GE51 R0808 Address CU address Assignment 7 30 CU 3 Direct heating circuit 8 30 CU 3 Mixed heating circuit 1 9 30 CU 3 Mixed heating circuit 2 A 40 CU 4 Direct heating circuit B 40 CU 4 Mixed heating circuit 1 C 40 CU 4 Mixed heating circuit 2 D 50 CU 5 Direct heating circuit E 50 CU 5 Mixed heating circuit 1 F 50 CU 5 Mixed heating circuit 2 The integrated room sensor determines the current room temperature for all the room temperature related functions and transfers them to the central device every 20 sec The desired control mode is selected with the input button press and hold approx 2 3 seconds and indicated by the corresponding LED When the button is pressed the control mode is adjusted in the following sequence AUTOMATIC MODE HEATI
237. y outputs The valve continually adjusts the hot water setpoint temperature at the strap on flow sensor no hysteresis The cycle time of the control unit must be less than or equal to 3 sec Normally a mixed valve with a runtime of 30 to 60 sec is used Attach a return sensor so that the mixing valve responds to the varying draw off behaviour A conclusion is made based on the quantity drawn off via the temperature differential and the valve is charged proportionally accordingly If the temperature spread between the tank sensor and the return sensor is greater than the set minimum spread you can assume that water is being drawn off In this case give the valve an offset that anticipates down times and thus prevents heavy cycling of the mixing valve The value to be added is dynamic and is yielded from the temperature differential and the set parameter value based on K deviation 153 Hydraulic Components SDC DHC Set value 7 2 8 Function 154 e Offset 0 100 e Default value 0 Represents the valve start up value degree of opening in It functions as an offset to the current valve position 0 means no accessing of the valve e DTmin 2 20 K factory value 5 K In case of a defect the tank sensor or flow sensor switches off to prevent scalding If hot water loading is not activated there is no setpoint for the mixed heating circuit The setpoint for the mixed heating circuit is mandato

Honeywell EN2H-0221GE51 R0808 Heating System User Manual

Contents

Download Pdf Manuals

Related Search

Related Contents