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1. THERM EL8 THERM EL 15 THERM EL 23 Nominal heat output kW 7 5 15 22 5 Rated current A 11 22 33 El components degree of shielding IP 40 Power voltage frequency V Hz 3 x 230 N 50 Max rated current A 3x12 3x24 3x36 Wiring main circuit breaker A 16A 32A 40A Rated current of the control system fuse A 1 25 Electric durability of the relay 1 10 cycles 16 A 250V 50 Hz Mechanical durability of the relay 10 10 cycles Heating water inlet outlet male G 3 4 Min service overpressure of the heating ipd bar ue Max service overpressure of the bar 2 5 heating assembly Max heating water temperature C 80 Boiler water capacity 1 14 5 Effectiveness for nominal output 99 Expansion vessel capacity 1 7 Max number of boilers in the cascade pcs 32 Dimensions height width depth mm 805 475 235 Boiler weight without water kg 39 5 42 5 45 5 Higher performance series THERM EL 30 THERM EL 38 THERM EL 45 Nominal heat output kW 30 24 5 45 Rated current A 44 55 66 El components degree of shielding IP 40 Power voltage frequency V Hz 3 x 230 PE 50 Max rated current A 3x48 3x60 3x72 Wiring main circuit breaker A 50A 63A 80A Rated current of the control system fuse A 1 25 Electric durability of the relay 1 10 cycles 16 A 250V 50 Hz Mechanical durability of the relay 10 10 cycles Heatin2. 16 DHW temperature display If any other variable is displayed at the moment heating water temperature output error message etc pressing any of the buttons 2 opens the DHW temperature dialogue This display is indicated by the pilot light above button 4 In the case of sensor defect or absence the numerical data become replaced with dashes _ _ during disconnection or interruption of the sensor or wiring after a short circuit on the sensor or wiring Displaying and change setting of the desired DHW temperature value If you press any of the A V buttons 2 with the display showing the DHW temperature dialogue you can set its desired value The setting process is indicated by flashing of the pilot control above the ENTER button 4 You can set the desired temperature value by pressing the A button 2 within the range defined by TU TU P3 5 a P3 6 items of the service menu The set value does not need to be confirmed The setting mode for the required values terminates 15 seconds after any of the A V 2 buttons has been last pressed The desired DHW temperature value can be set only if the tU DHW heating mode is set to b c P3 2 2 storage tank with the temperature sensor Switching the heating on or off The heating mode can be switched on or off by pressing the O I MENU button 3 The on mode is signalled by the pilot light between A buttons 1 the pilot light in the off
3. SSS NU TL OT BL EINE 9 5 N T i D Lg NS 5 g g 5 8 5 e I 55 gE Dede P R 828 8 s i 28 Ze 22 5 05965 ae 28 Therm EL 45 boiler connection to the power supply 4 5 6 Kou uw Ww NWN NZ Re1 Re2 Re3 Re8 Re9 1 2 3
4. 5 MV M M 4 MM Rei 2 Re3 Re8 REKREL REKCPU Circulation REKZOB Ke Ki e lt K5 ell s d _ 5 LLUIS 2 E 59 x d ER 0 Cascade o REKAS1 25 2 K3 SISIS NNNSNINNNNSSS o PT o OF TL re TV oT BL D Neurol 99 2 2 SISSSININISNISINISININININININ NSSSSSNSISNSININ 7 LIZ iii 8 ze 8 E 5 Eg af Pe a 68 I se gg 8608 ew 22 fofoa 28 580585 89 29 2 Therm EL cascade format Jojoe 2 z gt eg A E 5 lt gt Jos uos Jed Joop ino 10suos MHA WIN Jes xu ej eb 21015 z Ae ou Ae au 5 y 105095 anssad 20122 juo 53 25 Cir culation 205 uos Jed J00p 10suos MHA uon 1215 y yu 2196 21015 z Ae ou fejou PPH 5 y 105095 ORES oy amp inssaid 30 Master boiler Slave boiler L3 L2 L1 Connection of the current maximum value monitor to the boiler relief relay terminals Mains from the electrometer 3x 400 V Boiler terminals OR 151 degree disconnect
5. 36 hermona CERTIFICATE OF QUALITY AND COMPLETENESS OF THE PRODUCT Electric direct heating THERM EL boiler Type designation THERM EL Product number The appliance complies with the requirements of the European Directives No 89 336 EHS 73 23 EHS and other related technical regulations standards and recommendations Its operation under the service conditions in line with manufacturer recommendations is safe Measures were adopted which assure the conformity of this appliance now introduced to the market with technical documentation and basic technical safety and hygienic requirements Technical incpection MEM stamp and signature THERMONA spol s r o Star osada 258 Zast vka u Brna 664 84 Czech republic Phone 420 544 500 511 fax 420 544 500 506 thermona thermona cz www thermona cz 37
6. If the NU binary input specification is connected a value of ti2 P2 2 is used instead of til P2 1 til P2 1 Desired value of the room temperature True if NM is disconnected The setting range falls between 10 and 30 C step of 1 C leading value is 21 C ti2 P2 2 Desired value of the room temperature True if NM is connected The setting range falls between 10 and 30 C step of 1 C leading value is 19 C tdr r23 Temperature range of room in which the proportional control of the desired outlet water temperature value takes place The setting range falls between 2 and 10 C step of 1 C leading value is 3 C tdF P2 4 Difference hysteresis between the shut down and repeated initiation of heating when the desired room temperature has been exceeded The setting range falls between 0 25 and 2 50 C step of 0 25 C leading value is 0 5 C Complete heating shut down occurs if the room temperature exceeds the set value by more than tdF P2 4 Heating is again switched on only when the room temperature drops below the set value Group 3 Heating setting and display mode rto P3 1 Heating mode TOP The boiler operation is conditioned by the connection of the external room thermostat PT terminals at all possible settings If the thermostat is not used at all it is necessary to create a permanent connection between the PT terminals Settings options 0 Heating switched off It is not possible to switch it on even by
7. O I MENU button 3 for more than 2 seconds To move between the menu items press the buttons 1 If you want to change the input values press the buttons 2 The entered value in the menu must be confirmed by pressing the O I ENTER button 4 Exit the menu and data input by pressing the O I MENU button 3 The menu item the set variable and its value display alternately e g Et1 1 6 Et1 1 6 The menu item is displayed either by means of mnemotechnical texts Et1 or numerical parameters P1 1 The display mode is set in the menu by way of the diS P3 2 item User menu items Group 1 Integrated equitherm regulation parameters Equitherm regulation defines the desired value of heating water temperature depending on the outdoor temperature The selection of parameters for the calculation depends on the specification of the binary NU night moderation If NU is disconnected the following is true the desired heating water temperature value 20 outdoor temperature 20 ET2 If NU is connected the following is true the desired value of heating water temperature 20 outdoor temperature Et3 20 ET4 The desired outlet heating water temperature value is limited in the range between to_ P3 3 and to P3 4 Equitherm regulation always requires the connection of an outdoor temperature sensor and the heating mode setting of rto EtE P3 1 2 Et1 P1 1 Equitherm regul
8. and launching the operation of the whole system in line with CSN 06 0310 within the framework of the installation A suitable filter must be unconditionally fitted in the recuperative water inlet from the heating system into the boiler to prevent impurities from entering the boiler system The heating system must be installed in accordance with CSN 06 0830 Safety equipment for central heating and domestic hot water heating and CSN 06 0310 Central heating designing and assembly Shall the boiler be connected to a sealed heating system such system must have a pressure expansion vessel of sufficient capacity higher performance series boilers are not equipped with their own expansion vessel We recommend fill the system with soft water in line with CSN 07 7401 fit the boiler outlet with a bleeding device mount a filter or a sludge device into the pump suction section Overflow valve should be installed in heating systems with thermostatic valves mount a heating system charge and discharge cock and a sludge cock at the lowest point of the system in the very proximity of the electric boiler separate all electric boiler types on inlet and outlet by stop valves too see standards CSN 06 8030 not to be forced to discharge the whole system in case of inspection or repair of the boiler or during filter replacement remove control levers from stop valves and secure them against manipulation Boiler connection to electric
9. bar output KW error messages last error heating mode 6 3 digit 7 segment LED display 7 7 LED indicators for the selected functions 2 The Czech abbreviation for is translator s note 13 7x LED indication for the selected functions Thermona Tm hi 8 LED display DHW temperature Heating 1 temperature e a 8 DHW for the display mode and mode and parameters settings Error indication ERROR MESSAGES Error code Type of defect E 00 NO DEFECT E 01 DEFECT ON THE POWER RELAY CONTACT E 02 LOW PRESSURE detected by the analogue pressure sensor E 03 BLOCKING ELEMENT E 04 HEATING WATER TOP NTC TEMPERATURE SENSOR DEFECT E 05 DHW TUV NTC TEMPERATURE SENSOR DEFECT E 06 EMERGENCY THERMOSTAT manual reset directly on the thermostat E 07 OUTDOOR ROOM TEMPERATURE SENSOR DEFECT E 08 reserve E 09 PRESSURE SENSOR DEFECT analogous pressure sensor E 10 COMMUNICATION PROBLEM between boilers in the cascade master boiler 11 COMMUNICATION PROBLEM between boilers in the cascade slave boiler past defects register 1 20 Apart from the E 06 defect emergency thermostat temperature becomes exceeded all other defects shut down the boiler and bring it to the defect state heating bars become disconnected which is automatically revoked only after the defect has been removed The boiler s operation i
10. components and control methods prior to putting the boiler into operation and fill in the letter of guarantee and hand over this Operation and Maintenance Manual to the user User is bound to observe the correct use of the boiler in accordance with this Manual this is a basic precondition for acknowledgement of the warranty It is further strictly forbidden to interfere with any of the sealed parts inside the boiler Warning The settings of the boiler output range and other parameters must be in compliance with the technical data Any excess loads or incorrect use of the boiler can cause damage to its components Warranty does not apply to the components which suffer this kind of damage General instructions The following must be checked before the electric boiler is set into operation connection to the heating system opening of the fittings separating the electric boiler from the system and securing them against manipulation charging may be followed by pressurizing the system by soft water and subsequent bleeding electric connection and protection in line with the CSN standards For further details refer to the Chapter Wall mounting of the boiler The procedure for setting the boiler into operation is as follows switch on the main circuit breaker switch in the power intake switch on the boiler by pressing the button for heating actuation set the desired outlet boiler temperature to maximum check the c
11. external main circuit breaker switch unless there is a potential risk of system freezing or pump clogging these functions are naturally not available during the complete boiler shut down 10 Diagram for serviceable connecting charge pressures of heating water Warning The curves of serviceable charge pressures of heating water are calculated for Grundfos 15 60 pumps to the higest regulation grade THERM EL Charge pressure S a E o 5 a a a o x o P4 2 5 o Water flow m h 23 11 Therm EL boilers connection to the power supply Therm EL 8 boiler connection to the power supply di i E REKREL REKCPU Circulation pump Contactor SeS sisisisisisisisssis PT BT NU TL TB TV OT NR TOL 61918 91919 9 919 9 9 5 9 9 9 9 519 5 9 5 95 9 9 9 5 5 8 y 5 B 2 I 5 55 E se 58 38 8688 22 58 0580 Contact functions 1 contacts of the Room thermostat must be permanently connected during the boiler operation 2 contacts of the blocking element must be permanently connected during the boiler operation 3 contacts of the Emergency thermostat must be constantly connected during the boiler operation 4 if the storage tank Thermostat is connected the boiler heats the DHW in the storage tank 24 Therm EL 15 connection to t
12. heating bars Principle of a balanced service load on the heat bars extends their life time The heating bar which was connected first will be also disconnected first within the framework of the regulation cycle which leads to an increase in overall reliability and prolonged durability of the appliance The processor assess the operational time of individual heating bars and actuates them in a manner which ensures a thermally balanced loading of the boiler the boiler body and even service load of the bars system for launching the boiler operation THERM EL boilers signal and respond to commands from the MRC receiver of the external distributor The output signal of this receiver must be connected to the reset conductor which is attached to the MRC R terminal This method of remote control enables the boiler to operate in a low tariff rate and thus significantly reduce energy costs Maximum boiler output can be limited in the service menu if the operation must proceed also outside the so called low tariff Shall other ways of installing the MRC receiver be applied the output of which is one of the phases MRC LI L3 it is necessary to assure transmission to the R level reset conductor by means of e g installing an auxiliary relay in the external distributor Soft start The soft start function rests in a gradual heat up of the heating system which is therefore protected against abrupt upward temperature gradient When the boiler
13. mode is turned off Heating can be switched on only if its operation is pre set in the user menu the rto item must be set to tEr EtE Prt otP ot P3 1 1 5 Switching the DHW heating on or off The DHW heating mode can be switched on or off by pressing the O I ENTER button 4 The on mode is signalled by the pilot light between A V buttons 2 the pilot light is off if the DHW is in the off mode The DHW heating can be switched on only if its operation has been pre set in the service menu the rtU item must be set to b norb c P3 3 1 or 2 Displaying the outdoor room temperatures To display any other operational variables except for the heating water and DHW temperatures use the SELECT button 5 If you press or double press it the outdoor room temperature display dialogue opens This dialogue is indicated by the IN OUT pilot light In the case of sensor defect or absence the numerical data become replaced with dashes _ during disconnection or interruption of the sensor or wiring during short circuit of the sensor or wiring The difference between displaying the room or outdoor temperature rests only in the location of the sensor Shall the boiler operation be controlled on the basis of its data the respective mode must be selected in the user menu for rto EtE P3 1 2 integrated equitherm regulation outdoor sensor must be used for rto Prt P3 1 3 integrated room thermostat senso
14. network Wiring can be installed only by an authorized person in the sense of the Decree No 50 1978 Coll on professional qualification in electrical engineering Certification of the boiler installation and putting into operation must be noted in a proper manner on the letter of guarantee Any interference with internal boiler wiring with the exception of wiring specified in this Manual e g the external regulator connection instead of jumper wire are inadmissible The boiler control box must be connected according to the relevant CSN standard by means of a separately protected line which enables its disconnection and which is located in the very proximity of the electric boiler Current protective switch must be used if the electric boiler is installed in a bathroom The power wiring is connected by a 5 conductor system to the U V W N and PE terminals In the case of a 4 conductor system the N and PE terminals shall be connected together and the power wiring matched with the U V W and PE terminals If MRC is connected to the boiler control box the MRC receiver outlet is matched with the terminal marked HDO N WARNING When using the MRC receiver signal on the HDO N terminal it must be made sure that all contactor coils of other appliances e g of the boiler if it is connected to the common MRC signal are energized with the same phase When operation must be delivered also outside the so called low tariff the maximum boiler ou
15. 34 16 Wall mounting of the boiler 17 Boiler dimensions and connection IN N NS EN gt N E 2 i NU QI OOO Oo Q g 1 Recuperative water inlet Therm 8 15 23 34 Therm 30 38 45 1 2 Heating water outlet Therm 8 15 23 47 x Therm 30 38 45 1 3 Safety valve outlet 4 Blow valve outlet 35 18 Record of repairs and annual inspections Performed operation Contractual org Customer signature Date of record Warning regarding the disposal of the packaging and the product after the end of its service life time All applied materials comply with the requirements specified in Section 10 of the Act No 185 2001 Coll and Section 6 of the Act No 477 2001 Coll The product packaging is commonly disposed of in scrap paper collection centres The packaging foil can be disposed of in collection containers for plastics Boiler parts made from steel copper and copper alloys are to be delivered to sorted metal waste scrapyards Heat insulation of the combustion chamber is in accordance with the health safety and shall be liquidated in common home waste Standard storage conditions must be assured non aggressive and dust free environment temperature range of 5 to 50 atmospheric humidity of maximum 75 prevention of biological influences shocks and vibrations
16. ASSEMBLY KW ccscssssssssssssssssssscsssossosscsssssossassssensessessossoses 34 WALL MOUNTING OF THE BOILER CH r YE 35 BOILER DIMENSIONS AND CONNEC TION wsscssssssssscssssssccnscsscscescsacsessecscesssvseaccnssssiecstedesnsssiestecveedes 35 RECORD OF REPAIRS AND ANNUAL INSPECTIONS ccccsssssssssssccssssssssssssssscssesssssssssssssesseses 36 2 General use The construction of THERM EL electric boilers is designed for hot water heating systems with induced water circulation They can be installed in central or individual storey heating with induced circulation sealed or open systems and they are characterized by an environmentally friendly operation without requirements for venting of the combustion product Service free operation enables the installation of an external regulator other external regulating or controlling components not included in the boiler delivery package simple equitherm regulator or room thermostat integrated directly in the automatic controlling system which maintains the pre set room temperature The electric boiler can be used as a universal source of heat for heating flats small family houses resort houses and also as an alternative source to another main heat source of heating and hot water preparation also for transitional periods for heat pumps accumulation systems or in previously installed central or single storey heating systems etc To attain higher output levels
17. EDs for unequivocal signalling of the operational conditions option of a default setting immediate change of operation into the factory settings mode 4 Brief characteristics of the main merits of THERM EL electric boilers Simple and intuitive operation The control is designed in a simple understandable and unambiguous way Simple operation is also enabled by way of a three digit LED 7 seg display complemented by an unambiguous signalling system of a series of LEDs Pump protection against clogging Regular spinning of the pump once every 24 hours prevents potential clogging of the pump during an extended boiler down time Optional DHW heating It is possible to additionally connect an external indirect DHW heating storage tank to the THERM EL boiler Heating of the storage tank water is ensured by means of changing the position of the three way valve The boiler electronics can communicate with the temperature sensor continuous DHW temperature regulation as well as with the traditional storage tank thermostat can be set in the service menu External regulatory elements Boiler control by way of room thermostat or equitherm sensor is commonplace Connection of the boiler to the room thermostat or equitherm probe leads to further savings for electricity The THERM EL boiler is moreover able to cooperate with regulators communicating via the OpenTherm communication protocol Additional communication interface is not necessary If t
18. O mew 22 ge 28 5805865 85 27 Therm EL 38 boiler connection to the power supply 1 2 3 LIZ IZ IZ Z 14 4 14 7 Re1 Re2 Re3 B Re7 Re9 4 5 45 3 2 LIZ IZIZ IZ 14 Re1 Re2 Re3 Re6 Circulation REKCPU pump REKZOB K7 5 Q K5 K2 um g 8 E i ME 2 ol m Cascade o REKAS1 z 55 28 L BH
19. OR THE MASTER CASCADE BOILER PCC P7 1 NUMBER OF BOILERS IN THE CASCADE 7 2 SYSTEM CASCADE PUMP DECELERATION dC1 P7 3 BOILER PUMP DECELERATION IN THE CASCADE AFTER ITS HEATING OPERATION IS FINISHED AFC 7 4 CASCADE SYSTEM ANTI FREEZE PROTECTION FREEZE PhC P7 5 MAXIMUM CASCADE OUTPUT WITHOUT MRC SIGNAL POC P7 6 MAXIMUM CASCADE OUTPUT AT DISCONNECTED CONTACTS OF RELAY 1 AND 2 P1C P7 7 MAXIMUM CASCADE OUTPUT AT CONNECTED CONTACT OF RELAY 1 2 7 8 MAXIMUM CASCADE OUTPUT AT CONNECTED CONTACT RELAY 2 P3C P7 9 MAXIMUM CASCADE OUTPUT AT CONNECTED CONTACTS OF RELAY 1 AND 2 7 Boiler control and display of basic operational information more detailed user instructions Heating water temperature display After its connection to the power network the display shows heating water temperature in which is indicated by the pilot light above the MENU button 3 If any other variable is displayed at the moment DHW temperature output error message etc pressing any of the buttons V 1 opens the heating water temperature dialogue In the case of sensor defect the numerical data become replaced with dashes _ _ _ during disconnection or interruption of the sensor or wiring after short circuit on the sensor or wiring Displaying and changing setting the desired temperature of heating water If you press any of the A V buttons 1 with the display showing the heating water temperature d
20. Operation and Maintenance Manual for Electric Boilers user manual version February 2008 Therm THERM EL 8 THERM EL 15 THERM EL 23 THERM EL 30 THERM EL 38 THERM EL 45 10 11 12 13 14 15 16 17 18 1 CONTENTS LEV n f ec 2 GENERAL e 3 GENERAL CHARACTERISTICS OF THERM EL ELECTRIC BOILERS 3 TECHNICAL 7 BASIC INSTRUCTIONS FOR BOILER INSTALLATION eene eene natns 8 BOILER OPERATION E 13 BOILER CONTROL AND DISPLAY OF BASIC OPERATIONAL INFORMATION 16 USER MENU 19 PUTTING THE BOILER INTO OPERATION seseseereeseroseeoecroeceseeoeorcroroeseeoeocorororereoeoeeroroeeesereeoroscree 21 DIAGRAM FOR SERVICEABLE CONNECTING CHARGE PRESSURES OF HEATING WATER 23 THERM EL BOILERS CONNECTION TO THE POWER SUPPLY eere entente tnnt 24 WARRANTY AND RESPONSIBILITY FOR DEFECTS eere eee eese een tnn tn sensns insanus 31 DOMESTIC HOT WATER STORAGE TANK HEATING 31 THERM EL 8 15 23 BOILER ASSEMBLY KW sisccssstesssasessscsssvssasassenssnesseesstedessatessoossssessedsivssuvnses 33 THERM EL 30 38 45 BOILER
21. aced at the highest point of the water heating circuit The boiler control box enables connection of an external room thermostat addition of interface for the boiler cascade connection type programmable time switch and MRC mass remote control tariff switch Switching and electric line protection of the boiler and output inlets for the heating bars are not located in the boiler but they always form part of the electric distributor of the flat or house Terminals of the main wiring are concentrated in the right part of the boiler A sufficiently rated output line contactor or switch correctly marked which are used for disconnecting the electric boiler from the power network must be connected right next to the boiler during its installation Boiler operation characteristics Operational stage of the boiler is launched when heating system temperature drops below the temperature set on the boiler control panel or on the room thermostat Control circuit of the heating bars becomes activated and heating water inside the boiler body becomes heated gradually After the required temperature has been reached in the room if a room thermostat is applied the control microprocessor unit starts switching off the heating bodies one by one and the heating of the water stops At this moment the function of an adjustable limited pump deceleration in terms of time or temperature becomes activated As standard Therm EL boilers are also fitted with emergency t
22. ances e g flow through water heater washing machine dish washer stove etc are connected to the network Such a device is rules out the necessity of purchasing a high capacity main circuit breaker which also means the payment of a high lump fee If a part of the electric boiler needs to be disconnected the tripping device becomes connected to the terminals for a trip relay see the wiring scheme The output size which becomes disconnected by individual trip relays is set by changing the parameters in the control panel from zero to maximum in the service menu If the contact of the external tripping device should disconnect the whole boiler it shall be either connected serially in combination with the room thermostat 24V to the terminals of the blocking element 230 50 Equitherm regulation Heating water temperature in the equitherm regulation system is controlled on the basis of outdoor temperature The regulation takes place according to equitherm curves which specify the dependence between outdoor temperature and the temperature of heating water required to reach the desired room temperature An equitherm curve must be drawn on the basis of designed calculated or measured heat losses of the building This type of regulation does not have any feedback which would take into account higher cooling on one side of the house by wind or heating by sun and as a result it cannot safeguard accurate temperature regulation in all parts of t
23. at are selected the boiler automatically switches to the boiler thermostat mode outlet water temperature control according to a value set by buttons 1 DHW heating is possible in any of the modes If a respective display is selected the lower dashes _ _ are displayed if the sensor or wiring have become disconnected or interrupted upper dashes stand for short circuit on the sensor or wiring E 08 reserve 09 is a defect of the TOP heating water pressure sensor analogous sensor Boiler operation is not possible in any of the modes E 10 is a defect of the communication between boilers connected in a cascade which has been detected by the master boiler To display the details about this defect press button 5 Addresses of all boilers are alternately displayed each for the time of approximately 1 second which do not communicate with the master boiler E 10 c 04 c 05 E 10 c 04 05 E 11 is a defect of communication between boilers connected in a cascade which has been detected by one of the slave boilers 18 Displaying the instantaneous boiler output If you press or double press the SELECT button 5 the display dialogue of the instantaneous boiler output opens This dialogue is indicated by the letter P in the first position of the display The output is shown in kW P 2 5 22 5 kW P 18 18 kW etc 8 User menu Accessing the user menu To access the user menu press the
24. ating electrical apparatuses and the household has increased requirements for power take off the THERM EL boiler user will certainly appreciate the external energy input control function A relief relay can be connected to the distributor with a pre set value of the electric current If the current reaches e g 30 A the boiler disconnects a specified number of heating bars and relieves the whole system SLEEP standby mode Another function the advantage of which will be namely appreciated by those users who stay outside home for longer periods of time is the SLEEP mode This mode is used in situations when the house will not be inhabited for an extended period and the user wants to have the heating system reliably safeguarded against solidification or freeze up Boiler in the SLEEP mode consumes minimum amount of power but the protective boiler functions spinning unblocking and anti freeze protections are also active If the boiler is connected to an equitherm sensor the drop in outside temperature activates an anti freeze protection which can protect not only the actual boiler but the entire heating system If during the boiler s operation i e not only in the SLEEP mode none of the control panel buttons becomes activated when heating and DHW heating are switched off by the respective button the display automatically switches over to the saving mode only the LED is turned on 4 Technical data Lower performance series
25. ation parameter curve slope True for a disconnected NU The setting range falls between 0 1 6 0 step of 0 1 leading value is 1 6 Et2 P1 2 Equitherm regulation parameter curve shift True for a disconnected NU The setting range is 20 C 40 C step of 1 C leading value is 0 Et3 P1 3 Equitherm regulation parameter curve slope True for a disconnected NU The setting range falls between 0 1 6 0 step of 0 1 leading value is 1 6 Et4 P1 4 Equitherm regulation parameter curve shift True for a connected NU The setting range falls between 20 C 40 C step of 1 C leading value is 5 19 Group 2 Integrated room thermostat parameters An integrated room thermostat can control heating operation according to the data from internal temperature sensor It uses proportional control to set the outlet water temperature within the range defined by the tdr P2 3 parameter if TM til tdr TM P2 1 P2 3 heating is controlled to reach the maximum heating water temperature to P3 4 if TM gt til TM gt P2 1 heating is controlled to have the minimum heating water temperature to_ P3 3 if til tdr lt TM lt til P2 1 P2 3 lt TM lt P2 1 the desired heating water temperature is calculated by the interpolation between to_ and to P3 3 a P3 4 if TM gt til tdF the heating is switched off completely The aforementioned is true if the NU binary input specification is disconnected
26. boilers can be connected into a cascade format 3 General characteristics of THERM EL electric boilers Therm EL electric boilers are wall mounted appliances designed for water heating in a heating system and potentially for domestic hot water heating hereinafter referred to as DHW in an indirect heating storage tank THERM EL electric boilers are manufactured in three performance versions in the lower output category 8 15 and 23 kW The higher output series offers the following three types 30 38 and 45 kW Structural design as well as controlling system of these boilers are almost identical to the lower output series The electric boiler is formed by a steel vessel with inbuilt heating bars heating temperature probe and safety thermostat these components are all located under one cover in the upper part of the vessel The vessel is made from a varnished steel sheet and it is fitted with thermal insulation Heating water inlet on which a circular pump is mounted is welded at the bottom part of the boiler A lug located in the upper part of the vessel is adjusted to the cup for the boiler temperature sensor and emergency thermostat Heating water outlet and threaded sleeve pieces are also located in the upper part of the vessel Heating bars up to 6 are screwed in the sleeve pieces Total output of each heating bar is 7 5 kW there are three separate heating bodies with the output of 2 5 kW in each heat bar An automatic vent valve is pl
27. er Wall mounting of the boiler If the boiler is mounted on a wall with a lower carrying capacity it is recommended to consult the installation with a civil engineering technician Free space of at least min MBs 200 mm below and 750 mm above the lower and upper edges of the jacketing shall be left for the purposes of inspecting the boiler or replacing the heating bodies see Figure depicting the boiler wall mounting and installation Connecting the boiler to the hot water heating system Electric boiler must be connected to the distribution network in a manner preventing its aeration Connection to the heating system must be tackled in a project design calculating hydraulic ratios of the whole system because the installation involves a hot water flow through boiler fitted with an integrated pump It needs be noted that minimum flow through the boiler must be constantly assured for the designated boiler output at maximum thermal gradient of the heating system amounting to 20 Any reduction of this flow due to integrated high hydraulic friction elements results in insufficient circulation and drop in life time of some boiler parts To utilize the maximum output of the heat exchangers ensure correct functioning and high durability the minimum heating system overpressure must amount to 0 8 bar Proper rinsing of the heating system resulting in the removal of all impurities must be performed prior to testing
28. g water inlet outlet male G 1 Min service overpressure of the heating par i Max service overpressure of the heating dien oar 23 Max heating water temperature aC 80 Boiler water capacity 1 28 0 Effectiveness for nominal output 99 Expansion vessel capacity 1 to order placed outside the boiler Max number of boilers in the cascade pcs 32 Dimensions height width depth mm 805 475 235 Boiler weight without water kg 56 5 59 5 62 2 Manufacturing control boiler parts are checked and correctly set by the manufacturer prior to final assembly Each boiler is tested on water circuit tightness and the function of the regulating and safety components is set and tested as well The boiler was manufactured in line with Standards CSN EN 60 335 1 CSN EN 60 335 2 30 CSN 06 1008 CSN 07 7401 CSN 06 0810 CSN 07 0240 CSN 06 0310 CSN EN 60 730 CSN 06 0830 CSN EN 60 730 1 CSN 06 1010 Government Regulations No 163 2002 Coll 17 2003 Coll and 18 2003 Coll 5 Basic instructions for boiler installation Electric boilers are designed for permanent connection to a fixed mains supply voltage A disconnecting device main circuit breaker and a corresponding electric line protection must be installed in the permanent electric boiler mains Installation of electric boilers can be carried out only by a qualified expert company or authorized worker with the required qualification level in the field of electrical equ
29. he house Boiler connection to room thermostat and Therm 001 outdoor sensor enables utilizing the equitherm regulation which leads to additional energetic cost cutting THERM EL boiler is moreover capable of cooperating with OpenTherm communication interface regulators without any further communication interface installation The inclination and shifting of equitherm curves can be modified in the automatic control user menu 11 m mi m ha Heating water temperature C ERE K1 aom E m Outdoor temperature C Regulation according to room of reference Used in family houses Only temperature of a selected room is monitored on the basis of which the entire flat environment is regulated Other rooms with diverse heat losses will be heated to different temperature unless further thermoregulating knobs are not installed on the radiators This method has the advantage of a more flexible regulation If an NTC temperature sensor located in the room of reference is connected to the boiler automatic control system without any other external regulator the automatic control system can be used as a simple room regulator adjustable in the user menu a Prt heating mode Cascade connection of boilers The cascade connection format means connecting the boilers by means of technical elements into one set the task of which is common heating of large spaces in a manner which complies with require
30. he NTC temperature sensor is connected only in a room of reference according to which the whole heated space is regulated automatic control system can be used as a simple room regulator This can be set in the user menu Safety switch contactor Safety three phase contactor is inserted in the power branch circuit at the boiler inlet which can cut the power from the heating bars in case of emergencies and detected incorrect conditions for further details see auto diagnostics of the automatic control system and prevent a potentially dangerous situation from occurring Boiler cascade connection format option The boiler electronics enable connection of up to 32 boilers into a single intelligent cascade which modulates the performance ranging from minimum output of the first boiler to the total of maximum outputs of all boilers combined The interconnection of the master and slave boilers is possible only through a system of intelligent modules i e the same interface must be used for master as well as slave boilers GSM operated boiler The boiler can be switched on and off by means of a mobile phone it is however necessary that an external modem is used the modem is not an item of the boiler delivery package The boiler operation can be remotely launched by calling on GSM modem connected to the boiler for example prior to returning from holiday so that the house has a pleasant temperature at the time of arrival Balanced service load of
31. he power supply E REKREL l SS REKZOB t Contac r Pressure sensor a Pele 5 g t Bu 5 E E 86 855 B Dade SE 85 pops es 8585 25 Therm EL 23 boiler connection to the power supply iE gt sus SS REKREL REKCPU pump BHHE SS REKZOB 1 Contac or Pele 5 8 t Bu 5 E MEET iib B 22 o9v52 7E 58 0580 26 Therm EL 30 boiler connection to the power supply 1 2 Re1 Re2 Re3 Re8 Re9 4 4 DDA AT AA Anahi Re1 Re2 Re3 REKREL CREE REKCPU UR n REKZOB KT Ki a 5 5 ES K2 E gt ree 5 E LUIS g E wo T e Cascade REKAS1 55 i K3 K4 SISIS SINISISISISISINISINIS PT OR BT NU TL TV BL NNNNNNNNNNS 4 5 g z g 8 8 5 5 E E o I d gt T P z3 88888 B
32. he service engineer with the authorization of the manufacturer rtU P3 3 DHW TUV HEATING OPERATION MODE temperature probe thermostat to P3 4 LOWER LIMIT FOR THE HEATING WATER TEMPERATURE SETTING to P3 5 UPPER LIMIT FOR THE HEATING WATER TEMPERATURE SETTING t P3 6 LOWER LIMIT FOR THE DHW TEMPERATURE SETTING 107 P3 7 UPPER LIMIT FOR DHW TEMPERATURE SETTING PSt 4 1 START OUTPUT Pt P4 2 MAX OUTPUT DURING HEATING 4 3 MAX OUTPUT DURING DHW HEATING Ph P4 4 MAX OUTPUT WITHOUT MRC SIGNAL PO P4 5 MAX OUTPUT AT DISCONNECTED CONTACTS OF RELIEF RELAY 1 AND 2 P1 P4 6 MAX OUTPUT AT CONNECTED CONTACT OF RELIEF RELAY 1 P2 4 7 OUTPUT AT CONNECTED CONTACT OF RELIEF RELAY 2 P4 8 MAX OUTPUT AT CONNECTED CONTACTS OF RELIEF RELAY 1 AND 2 tSt P5 1 LIMIT OF THE REQUIRED VALUE OF TOP HOT WATER OUTLET to start heating ttU P5 2 REQUIRED OUTLET TEMPERATURE DURING BOILER HEATING bdF P5 3 DIFFERENCE BETWEEN DHW HEATING ON OFF 5 4 TIME LIMIT FOR THE OUTPUT TEMPERATURE AFTER HEATING START dCt P5 5 PUMP DECELERATION TIME AFTER HEATING IS FINISHED dCU P5 6 PUMP DECELERATION TIME AFTER DHW HEATING IS FINISHED AF _ P5 7 SYSTEM ANTI FREEZE PROTECTION tYP P6 1 BOILER TYPE SETTING 15 6 2 MULTIPLE FORMAT CASCADE CONTROL PARAMETER h 01 h 21 ERROR HISTORY DISPLAY i 01 i 12 SERVICE AND DIAGNOSTIC INFORMATION PARAMETERS SET F
33. hermostat which delivers maximum safety It is connected to the control circuit of the integrated output contactor The disconnection of the emergency thermostat disjunction of the controlling circuit relay and heating bars and thus the boiler shut down occur when the temperature reaches 105 C Shall the emergency thermostat become disconnected the boiler can be only put back into operation by an authorized service engineer Another protection of the boiler is assured by a pressure switch which disengages the control circuit when the heating system water pressure decreases when there is not enough water in the heating system When the system becomes replenished with water the boiler automatically relaunches operation Proper deaeration of the heating system must be assured prior to launching and also during boiler operation The heating system bleeding is partially ensured by the automatic vent valve which is placed at the outlet of heating water from the boiler body Selected important characteristics and merits of THERM EL electric boilers top microprocessor control very quiet operation switch power relay of the heating bodies state of the art design ergonomic interactive control smooth regulation 2 5 kW regulation step 5 kW with the higher performance series service adjustable pump deceleration protection of the pump against particulate build up PID regulation anti freeze protection DHW heating opt
34. ialogue you can display its desired value Slow flashing of the pilot light above the MENU button 3 shows the desired value The currently valid desired temperature value according to the operational mode is displayed e g calculated by means of the integrated equitherm regulator or integrated room thermostat by way of a communication line from the external regulator If you press any of the A buttons 1 with the display showing the desired heating water temperature you can set the desired value Faster flashing of the pilot light above button 3 indicates the setting process The desired temperature value can be set by means of A buttons 1 within the range defined by TO P3 4 a P3 5 items in the service menu The set value does not need to be confirmed The mode of setting the desired value terminates 15 seconds after any of the A V buttons were last pressed 1 The set desired value is valid in the following situations rto heating mode is set to tEr P3 1 1 control performed by contact of the external room thermostat rto heating mode is set to EtE P3 1 2 equitherm regulation but the outdoor temperature sensor defect has been reported rto heating mode is set to Prt P3 1 3 integrated room thermostat but the room temperature sensor defect has been reported rto heating mode is set to otP or ot P3 1 2 4 or 5 external OpenTherm protocol regulation but communication has failed
35. ile in operation to rid it reliably off the remaining air after the previous bleeding in the cold state When the system cools down refill it with water power outage MRC signal interruption occurs the boiler is shut down When the power supply is renewed the electric boiler restarts its operation objects can be placed on the jacketing or inside the electric boiler Cleaning of the electric boiler external surface is recommended only by a damp cloth It is recommended to bleed the heating system regularly and remove the deposited impurities by discharging small amounts of the liquid through the discharge cock assuring that also sediments at the bottom of the boiler vessel are washed out Switch off the boiler after the end of the heating season by the circuit breaker It is recommended to start the boiler for roughly 30 seconds every month to spin the pump outside the heating season Minimum water pressure at the circular pump inlet must be 5 kPa the water temperature must not exceed 75 C Check whether the air charge pressure specified on the expansion vessel label is sufficient for the heating system system static height of 5 m corresponds to the air charge pressure of 50 kPa 10m 100 kPa 15 m 150 kPa prior to the boiler connection to the heating system Setting the pressure in the expansion vessel When the system is filled with the heat carrier and properly vented write down the displayed system water pre
36. iler price 2 It is necessary to document all records with respect to the performed guarantee repairs and annual boiler inspections in the appendix to this Manual 13 Domestic hot water storage tank heating mode External indirect DHW heating storage tank can be connected to the THERM EL boiler Storage tank heating is ensured by changing the position of the three way valve The boiler electronics can communicate with the temperature sensor continuous DHW temperature regulation as well as with the traditional storage tank thermostat to be set in the service menu Service with a connected DHW storage tank is always of 31 superior position with regards to heating and the maintenance of the set temperature always proceeds without time limits with the exception of the MRC signal Shall the temperature in the storage tank fall below the set value the boiler system three way valve position is set preferentially and the boiler water heats up the external indirect heating DHW storage tank The DHW preparation can be deactivated by setting the boiler in the SLEEP mode If the operation mode is set after the termination of the MRC signal the DHW preparation becomes interrupted Connections of the storage tank and the three way valve are shown in the electric diagram Connection diagram of an electric boiler with indirect heating storage tank for informational purposes Electric boiler Thermostat DHW NTC senso
37. ion terminals for an external three way valve NTC temperature sensor or a storage tank thermostat optional connection of an external NTC sensor integrated equitherm regulation connection of an NTC temperature room sensor automatic controlling system as a room regulator integrated safety switch contactor for all output phases possibility of an intelligent cascade boiler connection format up to 32 boilers with smooth output modulation optional external control by means of GSM external modem necessary optional connection of an external regulator with OpenTherm communication balanced loading of the heating bars and bodies power relays do not form part of the processor board printed circuits easy servicing and replacement Special relays with integrated fastons were used i e high currents do not flow through printed circuits boiler start system functioning on the basis of a mass remote control MRC external control of energy input relief relay soft start integrated Grundfos UPS 15 60 pump integrated 7 l expansion vessel with the lower performance series integrated safety valve automatic bleeding digital heating water pressure sensor fitted with all types auto diagnostics unequivocal service notification of defects optional boiler parameter adjustment rich service menu three digit display displays selected temperatures pressure output error messages etc further 7 L
38. ion 1 2 2nd degree disconnection 1 3 12 Warranty and responsibility for defects The manufacturer is not liable for any mechanical damage to individual components by harsh treatment neither for any damage caused by unprofessional interference with the electronics during setting or connecting of accessory regulations or by using other than original components used by the manufacturer The guarantee does further not apply to defects brought about by nonobservance of the binding conditions specified in the individual sections of this Manual regarding operation and maintenance of the boilers The guarantee equally does not apply to non standardized ratios in the distribution networks fluctuation of the supply voltage chiefly during overvoltage peaks etc defects outside the boiler which affect its operation damage incurred due to external factors mechanical damage storage transport and defects originating during natural disasters etc In such situations the service organization can ask the user to reimburse the repair THERMONA spol s r o guarantees the correct operation of the boiler for the period of 24 months after it has been first put into operation Conditions which must be observed for the guarantee acknowledgement 1 Boiler inspection must be performed regularly once per year The inspections can be effected only by authorized organization i e by a contractual service body these inspections are not included in the bo
39. ipment maintenance In the process of installation all pieces of advice as well as warnings included in this Manual must be observed It must be performed in compliance with the valid standards and provisions The connection of an electric heating is subject to authorization issued by the local power distribution plant An applicant must ask for a provisional approval with the connection of a higher energy input and for a relevant direct heating dwelling unit tariff In the case of construction of a new or repair of an old central heating system we suggest that the design is elaborated by an expert Performance of an expert installation by an authorized service organization is always the precondition for warranty provision by the manufacturer Connection to the electric network and the wiring can be carried out only by an expert worker qualified in line with the Czech Decree No 50 1978 Coll Installation location must be chosen for the electric boiler which will enable necessary access for the operator or for the purposes of a service inspection Minimum distances between the boiler and a solid obstacle are shown in the Figure in the Chapter Wall mounting of a boiler Ask an expert worker of the company which performs the installation for a demonstration of the system function and training for operation Once the boiler has been put into operation a letter of guarantee must be certified by the authorized expert service worker In the location of the e
40. ipped with their own PID regulation which does not allow heating over the set temperature Even if the TOP temperature is set to 80 C electric boilers frequently overheat up to the temperature of 96 while THERM EL boiler heats up to the maximum temperature of 64 It is always suitable and economical to let the electric boiler be controlled by a superior regulatory element room thermostat or an OpenTherm communication regulator These regulators are not included in the boiler delivery package Connection of a room thermostat and servicing of the boiler electric section may be carried out only by authorized service organizations Regulation based on temperature in a referential room room regulator or an equitherm regulation of the heating water or potentially both can be used as further extensions to the regulatory option whole series of regulatory or switch thermostats can be used to control the room temperature E g PT 10 PT 21 PT 30 BPT 30 PT 30 GSM REV 23 CM 707 CM 907 or OpenTherm communication regulators such as Therm RC 03 PT 55 Elektrobock 73 110 Siemens or CR 04 Honeywell Regulators room regulator water temperature thermostat trip relay of the current value monitor or an OpenTherm regulator can be connected to the boiler s input terminals 24V circuits Current value monitor is a device used for disconnecting or reducing the output of the electric boiler when other high power input electrical appli
41. is switched on or a new regulation period is initiated and the resulting quick change in temperature caused by induction of heat into the system could also bring about noise due to the dilatation of pipes the boiler is actuated in the so called soft start and limits the output after it is launched Auto diagnostics unambiguous signalling and service messages THERM EL electric boilers are equipped with a very useful system of auto diagnostics chiefly with respect to service This function facilitates speedy and efficient removal of a potential boiler defect Apart from the commonly displayed user values heating water temperature the TOP circuit DHW temperature outdoor or room temperature sensor TOP circuit pressure the display can show other service information if the service menu is set up correspondingly E g disconnection or short circuit of all sensors boiler output MRC condition and other error messages Wide choice of parameter settings Service and user menus of THERM EL boilers provide a wide range of boiler settings according to specific conditions of operation or based on customer requirements The option of setting various outputs for the heating water and heating of DHW undoubtedly offers positive financial effects The possibility of setting different outputs with the MRC signal switched on or off provides the user with a pleasant heat comfort External energy input control If there are several concurrently oper
42. lectric boiler installation pressure water for filling the heating system and water discharge point must be available It is further necessary that the room has a sufficiently even wall electric boiler is wall mounted Boiler location Electric boilers can be installed in the basic E rae environment 5 5 according to the standards CSN ES Le 2000 3 and CSN 33 2000 5 51 range of temperatures de m between 5 and 40 C humidity depending on the mou temperature of maximum 85 no harmful chemical lt influences It be installed in residential as well as B he 4 non residential spaces with the exception of rooms witha bathtub or shower in bathrooms and wash rooms in general in zones 1 and 2 according to CSN 33 2000 7 aaf 701 It cannot be however installed in zone 3 in locations Um where a water jet designed for cleaning can form If the 8 boiler is installed in the permitted zones relevant electric current accident protection must be concurrently performed in accordance with the same standard too The installation location must be chosen which will allow sufficient access for the operator as well as service inspector Degree of shielding of the boiler electric components is IP 40 Wall mounting of the boiler Electric boiler is mounted on the wall by means of a fixing strip 1 supplied with the boiler according to the Figure in the Chapt
43. means of button 3 Anti freeze protection is active tEr 1 Heating is controlled by the external room thermostat contact and the outlet water temperature is set by buttons 1 2 Heating is controlled by integrated equitherm regulator Outdoor temperature sensor must be connected In the case of a defective sensor or if it is not connected the boiler is controlled in the like at P3 1 1 mode Prt 3 Heating is controlled by integrated room thermostat The room temperature sensor must be 20 In the case of a defective sensor or if it is not connected the boiler is controlled in the tEr like at P3 1 1 mode otP 4 Heating is controlled by external regulator which is connected by way of the OpenTherm Plus interface In the case of defective communication or regulator the boiler is controlled in like at P3 1 1 mode ot 5 Heating is controlled by external regulator which is connected by way of the OpenTherm Lite interface In the case of defective communication or regulator the boiler is controlled in the like at P3 1 1 mode diS P3 2 Menu display type mnemotechnical texts numerical parameters Settings options diS 012 AbC P3 2 0 1 leading value AbC 1 9 Putting the boiler into operation Service engineer with authorization from the manufacturer is obliged to make verifiable demonstration for the user of the boiler operation its individual parts safety
44. ments for a desired heat comfort Boilers can be arranged in a cascade see wiring diagrams by way of a simple interface which divides the actual electronics from the surrounding environment Boiler electronics enable connecting up to 32 boilers in one single intelligent cascade which will modulate the output ranging from the minimum performance of the first boiler to the sum of maximum outputs of all boilers REKAS 1 interface not included in the delivery package needs to be installed in both master and slave boilers The master boiler is in addition fitted with a master regulator selection of the master and slave boiler is done in the service menu MRC mass remote control Mass remote control MRC enables transmission of electricity as well as various commands to the users regarding tariff switching on the electrometer and operation of some appliances via standard distribution network Mass remote control is a set of technical means e g emitters receivers central automatics transmission routes etc serving the emission of commands or signals for switching on or off electrical appliances The MRC system has replaced the switch clock used in the past Each customer who makes use of tariff switching must be equipped with a respective device which ensures this activity This device is placed on the electrometer panel and cooperates with the electric boiler The MRC receiver is an apparatus which performs the required switching operation it f
45. or example blocks or unblocks an electrical appliance as a result of a processed MRC signal Depending on the service setting the boiler can be operated either only if the cheaper tariff signal is activated the HDO LED is turned on or if the user requires so parameter P4 4 12 6 Boiler operation Description of the control panel Control panel is simple and intuitive and displays the boiler functions The panel uses colour coding and graphical division of the heating and DHW preparation sections LEDs positioned between the buttons for setting the temperature higher lower up down arrows are turned on if the particular mode is selected i e either the DHW preparation mode or the heating water mode marked TOP If the display shows any other variable pressing one of the buttons 1 displays the heating water temperature the LED TOP is turned on If the display shows any other variable pressing one of the A V buttons 2 displays the DHW temperature the LED C TUV is turned on Changing the value of the desired variable When the heating water temperature is displayed the LED TOP is on the first pressing of one of the heating temperature setting buttons displays the setting for the required value of this temperature This is indicated by the flashing of LED TOP Required value can be changed within the ranges defined in the service menu The set value becomes automa
46. orrect functioning of all safety thermostats and control components check the settings of the boiler output range potentially adjust the settings on the basis of the heated building 21 Electric boiler operation is very simple and fast and does not require any special qualification The boiler can be nevertheless controlled only by adults who have been demonstrably explained the boiler function and operation This demonstration must be performed by the worker who carried out the installation and set the boiler into operation the display is turned on the control supply voltage is fed to the boiler Set the room thermostat or other control element to the required temperature Display the current heating water temperature by pressing the Arrow Up button To switch on the boiler press the O I button in the heating temperature setting section Concurrently the circular pump is switched on which runs for the period defined by the set parameters The heating function is indicated by the LED pilot light in the left section of the control panel HEATING After the set temperature has been reached the automatic controlling system gradually switches off the heating bodies in order to maintain the heating water temperature within the range specified by the parameters First heating maintain the highest possible service temperature of the heating medium in the system for the first four hours The system must be carefully deaereated wh
47. peration is not possible in any mode Water pressure measured by analogous pressure sensor is below 0 5 bar E 03 is a disconnection of the blocking element 2 Boiler operation is not possible in any mode 04 is a defect on NTC sensor for the TOP heating water temperature Boiler operation is not possible in any mode When the respective value is displayed the lower dashes _ _ are displayed in the case of disconnection interruption of the sensor or its wiring the upper dashes if there is a short circuit on the sensor or its wiring E 05 is a defect of NTC sensor for DHW temperature The boiler operation in the heating mode is possible DHW heating is not possible in the b c storage tank with sensor mode and it is possible in the b n storage tank with thermostat mode For further details see the rtU parameter for the operation of the DHW heating in the service menu If the respective temperature setting is selected lower dashes are displayed if the sensor or wiring have been disconnected or interrupted upper dashes gt are displayed for short circuit on the sensor or wiring E 06 defect emergency thermostat of TOP heating water temperature Boiler operation is not possible only after a manual reset E 07 is a defect of the NTC sensor for outdoor room temperature Boiler operation in the heating mode is possible If however the EtE heating mode equitherm regulation or Prt integrated room thermost
48. r gt MV AB T S A Indirect heating storage tank DHW MV valve servomotor AB heating water inlet from the boiler A heating water outlet to the storage tank B heating water outlet to the heating circuit T1 storage tank thermostat NTC sensor of the storage tank TUV DHW outlet 32 14 THERM EL 8 15 23 boiler assembly kW 1 Boiler frame 2 Pump 3 Safety valve 4 Pressure sensor 5 Discharge valve 1 2 6 Boiler heat exchanger 7 Emergency thermostat the sensor is placed in the cup together with the temperature sensor 8 Temperature sensor 9 Vent valve 10 Heating bar 11 Control display 12 Boiler automatic system 13 Expansion vessel 7 33 15 THERM EL 30 38 45 boiler assembly kW eA Ox e 1 Boiler frame 2 Grundfos pump 3 Safety valve 4 Pressure sensor 5 Discharge valve 1 2 6 Boiler heat exchanger 7 Emergency thermostat the sensor is placed in the cup together with the temperature sensor 8 Temperature sensor 9 Vent valve 10 Heating bar 11 Control display 12 Boiler automatic system
49. r in the room of reference must be used If the sensor is connected but the boiler operation is not controlled on the basis of its data these data are used at least for protecting the system against freezing Displaying the heating system pressure If you press or double press the SELECT button 5 the system pressure dialogue opens This display dialogue is indicated by the bar pilot light Minimum operation pressure of the system is 0 5 bar 17 Signal indication of the mass remote control The presence of the MRC signal is indicated by the HDO MRC pilot light If it is turned on it means that the full boiler input is allowed Reduction of the boiler input by way of MRC signal can be set in the service menu by means of the Ph P4 4 item Displaying the error messages If you press or double press the SELECT button 5 the error message dialogue opens This display dialogue is indicated by the letter E in the first position of the digital display If an error message is generated it is displayed automatically To display any other variable press buttons 1 2 and 5 If several simultaneous error messages occur all of them are displayed each for one roughly second e g E 02 E 04 E 05 E 02 04 E 05 E 00 no defect E 01 is a defect of one of the power relay contacts Boiler operation is not possible in any mode E 02 is low TOP water pressure in the heating system Boiler o
50. s then automatically re initiated Defect detected by the emergency thermostat is irreversible the thermostat is equipped with manual reset function which can be used only by an authorized service worker after the defect has been properly detected and addressed 14 Menu parameters It can be always selected in the user menu by the diS P3 2 parameter whether the item is displayed in the numerical format more suitable in foreign language versions of the automatic control system or in the mnemotechnical format closer to the Czech language MENU PARAMETERS Mnemo Numerical USER MENU format format settings Et P1 1 CURVE SLOPE AT BININ N UTL 0 night moderation disconnected 1 6 Et2 P1 2 CURVE SHIFT 1 0 Et3 P1 3 CURVE SLOPE 2 AT BININ N UTL 1 night moderation connected 1 6 Et4 P1 4 CURVE SHIFT 2 5 iit po 1 ROOM TEMPERATURE 1 AT BININ N UTL 0 night moderation 21 disconnected for rto Prt ROOM TEMPERATURE 2 AT BININ N UTL 1 night moderation connected ti2 P2 2 19 for rto Prt tdr P2 3 DIFFERENCE REGULATORY RANGE PROPORTIONAL 3 tdf P2 4 DIFFERENCE HYSTERESIS OFF ON 0 5 rto P3 1 HEATING OPERATION MODE tEr EtE Prt otP ot tEr diS P3 2 DISPLAY TYPE FOR THE MENU AbC SERVICE MENU Mnemo Numerical rmt rot opening this MENU is permined only to t
51. ssure value Correct the air charge pressure in the expansion vessel to the same value by bleeding Adjust the system pressure value to at least 10 kPa by filling more water into the system If the air charge pressure in the expansion vessel is not correctly adjusted similar defects big changes in pressure during operation occur as in the case of an insufficiently rated expansion vessel Maintenance Regular maintenance is very important for a reliable operation and high durability of the boiler and its components The user is recommended to contact the manufacturer via a local authorized service organization and ensure regular inspections after every year of operation which is one of the conditions for warranty acknowledgement Service engineer will also carry out an inspection of the control and safety elements of the boiler To safeguard faultless heating system service it is necessary to regularly check the initial water pressure in the cold state Shall any drop in pressure occur the heating system must be replenished with water The outer jacketing can be cleaned by a dishcloth dipped in soap suds and subsequently dried 22 Boiler shut down You can switch off the boiler for a shorter period by pressing the O lbutton or potentially by the room thermostat switch If you want to shut the boiler down for an extended period of time outside the heating season i e during summer holiday it is suitable to switch off the boiler by the
52. tically registered in the memory after 15 seconds of inactivity measured after the last button was pressed The required DHW temperature is set in a similar fashion by the DHW temperature setting buttons The five LEDs below the main display show the variables which are currently set or indicated on the 3 digit display if the LED TOP or TUV is on the display shows the temperature of water in the heating or DHW circuits if the LED our C is on the display shows the temperature of the outdoor or room temperature sensors if the LED HDO is on signal is activated and the boiler produces heat in the low tariff if the LED bar is on the display shows the pressure in the TOP system in bars Automatic control elements user access 1 Buttons for displaying heating temperature settings 1 higher lower additionally if selected browsing through the service MENU 2 Buttons for displaying DHW temperature settings A V 2 higher lower the flashing value of the selected variable can be also changed in the menu 3 Heating on off button O I MENU 3 press shortly open the MENU press for more than 2 seconds exit the MENU press shortly 4 DHW heating on off button O I ENTER 4 press shortly ENTER press shortly only in the MENU 5 SELECT main display selection button SELECT 5 temperature according to the menu and selected option water pressure
53. tput limit can be switched off in the service menu also without the MRC signal P4 4 Recommended cable cross sections under the plaster Boiler output kW 8 15 23 30 38 45 Power take off A 12 24 36 48 60 72 PVC insulated cable with copper 25 4 6 10 16 25 conductors 5 sq mm Charging heating system For the duration of the heating system charging the boiler must be unplugged from the electric network by disconnecting it by the main circuit breaker It is useful to maintain the level of filling pressure in a cold system in the range between 1 and 1 5 bar Filling must proceed slowly in order to let the air bubbles escape through the respective valves According to CSN 07 7401 the water used for the first filling as well as for refilling must be clear colourless without any suspended substances oil or chemically aggressive admixtures with a minimum carbonate hardness max 3 5 mval l and it cannot be acidic pH cannot be below 7 Only approved agents can be used for water hardness adjustments HDO is Czech abbreviation for MRC translator s note 10 Non observance of the aforementioned requirements results in cancellation of the undertaking for the damaged components Choice of the regulating and controlling components The boiler is fitted with basic regulatory and safety elements as the following electric diagrams show Therm EL boilers can regulate their outputs They are equ
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