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Operating Instructions Logamatic 4323

1. A 1 06 00 08 00 11 30 13 00 17 00 22 00 B 1 gt 3 2 L 06 00 08 00 11 30 22 00 7 747 012 053 11 1RS Fig 19 Connecting two heating phases A Midday program B New program Own program 2 1 Day mode 2 Night mode 3 Turn from 13 00 to 17 00 e Select a heating circuit gt Chapter 7 6 Example Heating circ 2 e Select the standard program for the chosen heating circuit gt Chapter 7 10 here Midday program The first switching point start point Monday at 06 00 at 21 C will be displayed Turn the rotary selector to the stop point of the first heating phase you want to connect with another here 13 00 58 Logamatic 4323 Subject to technical modifications Additional programming options EN The display shows the stop point which should be connected Midday program Monday at 13 00 17 C Hold down Time and turn the rotary selector clockwise until the start point of KN C the second heating phase i e the next consecutive heating phase is displayed which you wish to combine with the first heating phase here 17 00 If you have selected the start time of the next consecutive heating phase the bottom line will show eight blocks which are deleted from left to right in intervals of one second When all the blocks have been erased both heating phases have been combined Switch period is combined LLL The deleting process will be ter
2. Actual room 19 5 C Outside temp 0 C Buderus Subject to the way your installer has configured your system it may be that one or more MEC2 displays will not appear although the above modules are fitted in your control unit Detailed descriptions of MEC2 displays for other modules are included in the corresponding module documentation There are two different permanent displays One of the factory set permanent displays is shown subject to whether the MEC2 is fitted in a control unit or is installed as a wall mounted unit Factory set permanent display if the MEC2 is fitted in the control unit Factory set permanent display if the MEC2 is installed as a wall mounted unit 18 Logamatic 4323 Subject to technical modifications y lo 2209 t s gt E 3 o Q l B o Oy o Ad O Standard functions 6 6 3 Selecting the operating mode You may operate the MEC2 programming unit in two ways in automatic mode in manual mode Automatic mode Generally homes are heated less at night than during the day With the MEC2 programming unit you don t need to adjust the thermostatic radiator valves before bedtime or in the morning The automatic changeover of the MEC2 programming unit will do that for you It changes over between the day mode standard mode and the night mode setback mode The times a
3. Logamatic 4323 Subject to technical modifications 43 Extended functions 7 15 Setting the operating mode for DHW circulation Heat circ sel DHW circulation Actual room Outside temp Buderus The DHW circulation pump provides an almost instantaneous supply of DHW to the draw off points For this the DHW is circulated by a separate DHW circulation pump twice per hour for three minutes Your installer can match this interval to requirements at the service level You can modify the operating mode of DHW circulation as follows e Open flap Hold down Heating circ and select DHW circulation with the rotary selector Release the Heating circuit key Then the permanent display will appear again Select one of the following operating modes for the DHW circulation pump Constant operat The DHW circulation pump will operate at the set interval i e independent of the heating circuits Press Day mode to select constant operation After approximately three seconds the permanent display will appear again Automatic 30 minutes before the first heating circuit is switched on the DHW circulation pump starts to run at the set interval and stops when the last heating circuit is switched off factory setting Alternatively you can enter your own individual DHW circulation pump program gt Chapt
4. Buderus 42 Logamatic 4323 Subject to technical modifications Extended functions 7 14 Setting the DHW operating mode Heat circ sel DHW Actual room 19 5 C Outside temp 0 C This allows you to change the DHW temperature in the DHW cylinder e Open flap Hold down Heating circ and select DHW with the rotary selector Release the Heating circuit key The permanent display will then appear again Select one of the following operating modes for DHW Constant operat The water inside the DHW cylinder is constantly maintained at the set temperature Press Day mode to select constant operation After approx three seconds the permanent display will appear again Automatic 30 minutes before the first heating circuit is switched on the boiler will heat the DHW cylinder to the set temperature and stop when the last heating circuit is switched off factory setting Alternatively you can enter your own individual DHW program gt Chapter 8 3 Press Automatic to select automatic mode After approx three seconds the permanent display will appear again DHW OFF DHW heating is switched off Pressing DHW switches heating on for the duration of DHW heating once Press Night mode to stop DHW heating After approx three seconds the permanent display will appear again Buderus
5. O maint after Date required maint after Hours run required If your installer has with your agreement activated the Automatic maint message the maintenance message Note maint message is displayed at the predetermined time on a particular date or after so many hours run e Open flap Turn the rotary selector You will see either maint after Date required or maint after Hours run required e Notify your installer to schedule the inspection and maintenance work The Logamatic telecontrol system enables the maintenance message to be transmitted automatically to your mobile email address or fax machine USER NOTE The automatic maintenance message remains active until your installer resets it Buderus 50 Logamatic 4323 Subject to technical modifications Additional programming options EN 8 Additional programming options This chapter is aimed at interested customers who would like to familiarise themselves further with the functions of their heating system The following pages explain how to change a standard program if none of the preset standard programs gt Chapter 7 11 match your lifestyle You will learn how to create a new heating program which accurately matches your personal circumstances 8 1 Modifying the standard program by inserting deleting switching points 8 1
6. 0 for which you want to adjust the temperature After approximately two seconds the display will show the currently selected temperature and the operating mode Adjust the temperature with the rotary selector here 21 C for the heating circuit Release the key to save your input Selroom ae The day room temperature is now adjusted to 21 C The selected permanent display will then appear again Automatic day USER NOTE If you want the adjust the temperature for an operating mode that is not the current mode first select the corresponding operating mode e g with the Night mode key After you have modified the temperature reset the operating mode to the previous setting USER NOTE For heating circuits with individual remote control units e g BFU you can adjust the room temperature only via this remote control gt see the instructions for that remote control unit Buderus Logamatic 4323 Subject to technical modifications 33 Extended functions 7 8 Heating circuits with MEC2 programming unit Setting Not possible MEC heat circ select Time switch Not possible Single heat circ select Buderus During installation your installer will determine which heating circuits should be controlled by the MEC2 programming unit These heating circuits are referred to as MEC heat circ MEC heat circ The following adjustments made at the MEC2 apply all t
7. 13 Time switch 30 35 Flow sensor aoaaa a 73 Troubleshooting oaao a 73 FM441 Lc 68 U FM442 coco 70 Underfloor heating 0 74 Function modules 4 65 Z H A ee rye ar ENEA ERN ees 66 Heating circuit 31 32 68 Heating circuit and DHW function 69 Heating circuit function 67 Heating circuits allocation 77 Heating control o s ses ea o a o 5 Heating domestic hot water 24 Heating phase aa 56 Heating program 27 35 37 Heating system emergency stop switch 16 Holiday function aoaaa a 45 Holiday mode oaoa 47 Holiday program aaa aaa 0004 45 l Instantaneous water heater 5 K Keypad cir Gone area E a a Re 14 L Light emitting diodes 66 68 70 M Manualmode 19 21 75 Manual switch 2 66 Matching the room temperature 49 Module equipment level 65 Modules 2 2 00 522005 65 Buderus 78 Logamatic 4323 Subject to technical modifications Logamatic 4323 Subject to technical modifications Buderus 79 Buderus Cotswold Way Warndon Worcester WR4 9SW Customer service 0870 421 5933 Technical support 0870 421 5944 Fax 01905 753130 www buderus co uk C amp F Quadrant Ltd Unit L40 Cherry Orchard Industrial Estate Cherry Orchard Dublin 10 Tel 01 6305700 Fax
8. To enter the next switching point e g Friday 13 00 21 C repeat the procedure detailed above Press Back to return to the permanent display Buderus Logamatic 4323 Subject to technical modifications 53 En Additional programming options Family program Monday at 05 30 21 C e Q Family program Monday at 22 00 17 C 6 E Buderus 8 1 2 Deleting switching points Example The switching point Monday 22 00 is to be deleted from the Family program for heating circuit 2 Your modified program will be saved under the program name Own with the number of the heating circuit concerned A 1 2 a 05 30 22 00 B 1 2 05 30 7 747 012 053 13 1RS Fig 17 Deleting a switching point A Family program B New program Own program 2 1 Day mode 2 Night mode e Select a heating circuit gt Chapter 7 6 Example Heating circ 2 e Select the standard program for the chosen heating circuit gt Chapter 7 10 Example Family program The first switching point start point Monday at 05 30 at 21 C will be displayed Turn the rotary selector to the switching point you want to delete here 22 00 The switching point to be deleted is displayed Simultaneously press and hold Display and Holiday 54 Logamatic 4323 Subject to technical mod
9. 17 C Constant night _ You may interrupt your holiday program at any time and provide heat according to the set day and night temperatures Only the AUT LED illuminates if a heating circuit is in holiday mode Interrupting the holiday function Press Day mode The display shows Constant day You may interrupt the holiday function any time by pressing Day mode In this case the system heats according to the set room temperature gt Chapter 6 4 Continuing the holiday function Press AUT to continue the interrupted holiday function Interrupting the holiday function Press Night mode The display shows Constant night You may interrupt the holiday function at any time by pressing Night mode In this case the system heats according to the set night temperature gt Chapter 6 4 Continuing the holiday function Press AUT to continue the interrupted holiday function Buderus Logamatic 4323 Subject to technical modifications 47 Extended functions 7 18 Setting the party function a Party function 4 hours EY This function only applies to heating circuits to which the MEC2 has been assigned as a remote control unit MEC heat circ All heating circuits without an MEC2 continue to operate normally Enter the length of time the system should only heat to the preset room temperature Example You have a party and want to heat for the next four hours to the p
10. 30 minutes prior to the first switching point of all heating circuits associated with this control unit and ends when the last heating circuit is switched off New switch point If your DHW is to be heated independently of the heating circuits you can enter your own new DHW program as follows Example On all weekdays DHW should be heated from 06 30 until 09 00 e Select a heating circuit gt Chapter 7 6 here DHW e Select a program for the heating circuit DHW gt Chapter 7 10 here Program select new The display shows a blank screen New switch point for the new switching point e Enter the switching points gt Chapter 8 2 USER NOTE Only after all three details day time temperature have been defined the new switching point will be automatically saved under Own program DHW and the heating circuit selection DHW The saving function is not visualised on the display The display shows a blank screen New switch point for the next switching point Repeat this process for all required switching points DHW heating will now operate according to your Own program DHW You can call up your new Own program DHW by pressing Prog and turning the rotary selector gt Chapter 7 6 Buderus Logamatic 4323 Subject to technical modifications 63 En Additional programming options 8 4 Creating a new DHW circulation pump program You may operate the DHW circulation pump either accor
11. Chapter 7 7 Q Set room 23 C Automatic day Buderus 22 USER NOTE The set room temperature applies to the currently active heating mode i e day or night mode You will recognise whether the currently active heating mode is on because the green LED will be illuminated 6 4 1 For the current operating mode You are currently in automatic Day mode and would like to alter the room temperature Condition For this the programming unit flap must be closed Turn the rotary selector to the required day room temperature here 23 C The day room temperature is now adjusted to 23 C The selected permanent display will then appear again Logamatic 4323 Subject to technical modifications Standard functions 6 6 4 2 For the operating mode not currently active You may also adjust the room temperature for an operating mode that is currently inactive For example you are currently in automatic day mode and would like to alter the set night temperature Hold down Night mode and select the required night room temperature with the rotary selector here 16 C O Release the Night mode key petigan The selected night temperature is now set to 16 C The selected permanent toe display will then appear again Constant night cu Press AUT The AUT LED illuminates automatic mode is active again USER NOTE If you are currently in automatic night mode and yo
12. Getting to know this heating technology may appear daunting at first but after a short while you will recognise the advantages you can gain from a heating system that is set up to meet your personal requirements The more you are aware of the options offered by your heating system the greater the benefit you will be able to draw from it How does your heating system work Your heating system comprises the boiler with burner heating control unit pipework and radiators A cylinder holds the domestic hot water DHW or an instantaneous water heater heats the water required for shower bath or hand washing Subject to the way your heating system has been installed it can operate either purely as a central heating system or together with a DHW cylinder What is important is that the various components match each other The burner consumes fuel e g gas or oil and heats the water inside the boiler Using pumps this hot water is transported through the domestic pipework to the consumers radiators underfloor heating system etc Buderus Logamatic 4323 Subject to technical modifications 2 What you should know about your heating system Fig 1 shows the heating circuit of a pumped central heating system The burner 2 heats the water inside the boiler 1 This heating water is transported by the pump 8 through the flow line 4 to the radiators 6 The heating water flows through the radiators and in doing so gives
13. yoo o A 20 0009 op 21 C Constant day Standard functions 6 In this chapter you will find information about the standard functions of the MEC2 programming unit and their use The standard functions are Selecting the operating mode Setting the room temperature Setting the DHW temperature Heating DHW once The standard functions are controlled by pressing one of the keys on the Standard function keypad or by turning the rotary selector Example Adjusting the room temperature for day mode Press Day mode to select the standard heating mode day mode The LED of the Day mode key illuminates day mode is enabled Set the required room temperature by turning the rotary selector NOTE For this the programming unit flap must be closed The display shows the set value Buderus Logamatic 4323 Subject to technical modifications 17 USER NOTE If your heating system is equipped with several heating circuits you must first select the correct heating circuit gt Chapter 7 6 Only then can you select the operating mode and the room temperature USER NOTE The following MEC2 displays only describe the possible displays of module ZM433 standard equipment level of the most frequently used FM441 and FM442 modules auxiliary equipment 6 2 Permanent display Common flow Outside temp
14. DHW sensor DHW Stays cold DHW Thermal disinfection DHW DHW warning Heating circuit x Remote control Heating circuit x Communication Heating circuit x Fault mess Pump Heating circuit x In manual mode BUS system ECO BUS has no reception BUS system No master BUS system Address conflict Address Conflict slot y Address Incorrect module slot y Address Unknown module slot y DHW Inert anode DHW Ext fault input DHW In manual mode Substation Too little heat supply Substation Flow sensor Troubleshooting 50 Buderus Logamatic 4323 Subject to technical modifications 71 KN Troubleshooting 10 1 Simple troubleshooting If no fault messages are displayed on the control unit in spite of cool rooms or cool DHW there may be an incorrect setting Observation Possible cause s Remedy Control unit is unilluminated or does not function ON OFF switch set to OFF No power supply ON OFF switch set to ON Check main fuse Heating system emergency stop switch set to ON MEC2 unilluminated MEC2 incorrectly plugged in contact problems Plug in MEC2 correctly The actual room temperature for the relevant heating circuit is incorrectly displayed Check the heating circuit assignment The programming unit operates in setback mode Check time and heating program and modify if required The set room temperature
15. The deleting process will be terminated if you release the Time key prematurely or turn the rotary selector back In that case all switching points for the heating phase remain active Release Time to save your input The display shows the next switching point The new program that has been modified by the deletion will be saved under Own program and the relevant heating circuit number here 2 You can call up your new program by pressing Prog and turning the rotary selector gt Chapter 7 10 Press Back to return to the permanent display Buderus Logamatic 4323 Subject to technical modifications 57 En Additional programming options Midday program Monday at 06 00 21 C Buderus O 8 1 4 Connecting heating phases A heating phase consists of two switching points a start and a stop point To connect two consecutive heating phases place the stop point of the first heating phase on the start point of the next phase Example Starting from the standard Midday program for heating circuit 2 you want to join the Monday heating phase from 11 30 to 13 00 to the heating phase from 17 00 to 22 00 In other words you want to heat continually from 11 30 until 22 00 Your modified program will be saved under the program name Own and the number of the heating circuit concerned
16. displays are available Common flow if MEC2 is installed in the wall bracket Outside temp Domestic hot water Time Date Only if a DHW module has been installed Hold the Display key down and select the required permanent display with the rotary selector here Date Release the Display key The selected permanent display has now been saved Buderus Logamatic 4323 Subject to technical modifications 29 Extended functions 7 5 Setting the date and time USER NOTE Date and time are preset at the factory This function is backed up by battery power independent of the mains power supply The MEC2 contains a radio receiver that under normal reception conditions constantly monitors and corrects the programming unit time switch Q Reception of the radio clock signal is indicated by symbol on the display USER NOTE We recommend leaving the radio clock receiver disabled outside Germany to prevent the reception of false signals incorrect time setting Set date 20 08 2001 Monday Q Set time 15 52 58 Y Buderus Setting the date Hold Weekday down and select the required date with the rotary selector here 20 The name of the day automatically changes here Monday if you set the date for the day using the rotary selector here 20 Release Weekday to sav
17. off some of its heat The heating water flows back to the boiler via the return line 7 where the cycle starts again The room temperature can be adjusted to your personal requirements using the thermostatic radiator valves 5 All radiators are supplied with the same flow temperature The heat transferred to the room depends on the radiator surface and the heating water throughput Therefore the heat transfer can be manipulated via the thermostatic radiator valves What determines the heat demand of a room The heat demand of a room largely depends on the following factors the outside temperature the required room temperature the type of construction insulation of the building the wind chill radiant energy from the sun the internal heat sources open fireplace occupants lamps etc closed or open windows Take these factors into consideration to achieve a comfortable room temperature Buderus Fig 1 Pumped central heating design 1 Boiler 2 Burner 3 Pump 4 Flow line 5 Thermostatic radiator valves 6 Radiators 7 Return line wi 1 41 k LIR Fig 2 Influences on the room climate Logamatic 4323 Subject to technical modifications Why do you need a heating control unit The heating control unit ensures convenient heat and economical consumpti
18. or Reduced has been set by the installer Buderus Logamatic 4323 Subject to technical modifications 45 N m gt lt O 3 o O o a 3 o ay o gt o E Q Holiday days Set room 12 C al Y Buderus Hold Temp down and select the required temperature with the rotary selector here 12 C The display shows 12 C Release the Temp key to save your input The holiday function becomes active immediately after entry You can cancel the holiday function any time by calling it up as described above and by setting the number of holiday days to 0 e USER NOTE DHW heating and DHW circulation will be switched off automatically if DHW is heated subject to the heating circuits Program select by heat circs gt Chapter 8 3 and all heating circuits are set to holiday mode You cannot enter a separate DHW holiday function 5 USER NOTE A separate DHW holiday function can be entered if DHW is heated according to a separate time program Program select own DHW gt Chapter 8 3 The DHW circulation pump is switched off automatically during the DHW holiday function 46 Logamatic 4323 Subject to technical modifications Extended functions 7 17 Interrupting and continuing the holiday function Set room 21 C Constant day Set room
19. room temperature o ooo oo 22 6 5 Healing domestic hot Waller lt gt sra ra e a a a 24 7 Extended functions 2 ivecvek bend vee e a 27 7 1 Keys for extended functions lt lt ooo ooo ee 27 7 2 Controlling the extended functions 2 o eee 28 7 3 Displaying Operating values oscursinacarear ada e ee 28 7 4 Changing the permanent display o ooo e 29 7 5 Setting the date and time comscrcricecceorsicrrrr rara 30 7 6 Selecting a heating circuit averia daran dra a a 31 7 7 Adjusting the room temperature for another heating Circuit 32 7 8 Heating circuits with MEC2 programming unit o o ooo ooo 34 7 9 Selecting and modifying a heating program o oo ooo ooo ooo 35 7 10 Selecting a standard program o ooo ooo 37 7 11 Summary of standard programs asoan 38 7 12 Modifying the standard program by moving switching points 39 7 13 Setting the summer wintertime changeover o o ooo eo mo 41 7 14 Setting the DHW operating mode 00 222 eee ee 43 7 15 Setting the operating mode for DHW circulation lt lt o 44 7 16 Setting the holiday function 4s dos Gee de pies ad eee eae ee dae 45 Buderus 2 Logamatic 4323 Subject to technical modifications 7 17 Interrupting and continuing the holiday function o o e eee 47 7 18 Setting
20. the BFU of heating circuit x and the control unit Remote control may be faulty Notify your installer DHW sensor fault If the DHW sensor is faulty water will not be heated for safety reasons Notify your installer Heating circuit x in manual mode Depending on switch positions pumps servomotors etc will be operated manually The switch was set to manual for maintenance or troubleshooting Return the manual switch to AUT after the fault has been remedied Substation flow sensor fault Possible over or under supply Notify your installer Substation Too little heat supply Fault Heating circuit x has insufficient supply A DHW circuit is not being heated The external heat source must supply more or sufficient heat Buderus Logamatic 4323 Subject to technical modifications 73 EH Operation in the event of a fault 11 Operation in the event of a fault RISK TO LIFE from electric shock WARNING Never open the control unit e in an emergency switch off the control unit e g with the heating system emergency stop or isolate the heating system from the mains supply by removing the fuse e Arrange for your installer to rectify any heating system faults immediately SYSTEM DAMAGE If an underfloor heating system is SARE installed Before operating your heating system manually check the temperature settings of the temperature limiter on the boil
21. the draw off points without mixing in cold water Manual mode FM456 and FM457 function modules accessories In case of a fault you can switch off the heating circuit pump by setting the manual switch to Y i e manual The boiler is switched to emergency mode as described in the technical boiler documentation Buderus 76 Logamatic 4323 Subject to technical modifications 12 Setup report Setup report 12 Operating values Input range Factory setting Setting Family Early Morning Late Evening Morning Program select Afternoon Family Noon Single Seniors New DHW 30 C 60 C 60 C 10 C 30 C Summer wintertime changeover constant summer 17 C constant winter Day room temperature 11 C 30 C 21 C Night room temperature 2 C 29 C 17 C Holiday room temperature 10 C 30 C 17 C Thermal disinfection Yes No No Assignment of heating circuits As part of the commissioning process your installer will assign the individual heating circuits of your heating system e g heating circuit 1 I h side of ground floor Heating circ Allocation Heating circ 0 Heating circ 1 Heating circ 2 Heating circ 3 Heating circ 4 Heating circ 5 Heating circ 6 Heating circ 7 Heating circ 8 Buderus Logamatic 4323 Subject to technical modifications 77 EE os 13 Index A N Adjusted outside temper
22. the party function uta add a o arca ora a ex 48 7 19 Setting the pause function 2 ooo ooo ee 48 7 20 Room temperature matching lt lt lt ooo ooo o 49 7 21 Automatic maintenance message oooooocoocoon oa 50 8 Additional programming options 22 05 51 8 1 Modifying the standard program by inserting deleting switching points 51 8 2 Creating a new heating program o o ooo ooo 60 8 3 Creating anew DAW program cs carr da a we wn ees 63 8 4 Creating a new DHW circulation pump program o o o oo oo oo o 64 9 Modules and their functi0NS o cocococonooo o 65 9 1 ZM433 central module standard equipment level o 66 9 2 FM441 function module accessory o o es 68 9 3 FM442 function module accessory ooo o 70 10 TroubleShO0tMO 2 lt 4 62 62 ce4S2540Ss sorbo ta sa SS 71 10 1 Simple troubleshooting 5 6004 2 he e a a ia dee a a Be 72 10 2 Troubleshooting 224 2025 rear a e 73 11 Operation in the event ofafault o o oooooo 74 11 1 EMergeney MOE tee ss Cade arak eee See eR ee Se ee ee G 74 11 2 Heating with manual override scene ee tee eb ew e ee Be 75 12 Setup report RR 77 13 MEX oeri na ea a ii dada KR FS 78 Buderus Logamatic 4323 Subject to technical modifications 3 Ea Introduction 1 Introductio
23. the values that flash on the display Release key Modified values are saved Back key Exit menu 7 3 Displaying operating values AUT E o 192205 J o O oS o 0 as a00 JUN Buderus 28 O You can display and control the various operating values of the boiler the selected heating circuit and the system Only the operating values of the selected heating circuit e g heating circuit O are displayed gt Chapter 7 6 e Open flap Turn the rotary selector clockwise without pressing any other key Logamatic 4323 Subject to technical modifications Heating circ O Set room 20 C Extended functions Subject to the modules various of the following operating displays can be called up Burner and hours run Actual heating circuit room temperature Set heating circuit room temperature Heating circuit operating state Actual heating circuit flow temperature Actual DHW temperature Set DHW temperature DHW operating mode DHW circulation pump and cylinder primary pump operating state Only if a DHW module has been installed 7 4 Changing the permanent display Common flow 45 C Date 20 08 2001 You can determine the permanent display of the programming unit The following permanent
24. this kind of control you should not fit thermostatic radiator valves in the reference room Buderus Weather compensated control with room temperature hook up Weather compensated control with room temperature hook up combines the advantages of the first two control modes The required flow temperature that is mainly subject to the outside temperature can be adjusted by the room temperature only to a limited degree This achieves improved maintenance of the room temperature within the room containing the programming unit without completely ignoring the other rooms With this kind of control you also must not fit thermostatic radiator valves in the reference room Why not fit thermostatic valves If for example you want to reduce the room temperature in the reference room and you therefore turn the thermostatic valve down the flow rate through the radiator will be reduced and therefore less heat is transferred to the room This reduces the room temperature The control unit will endeavour to counteract the falling room temperature by raising the flow temperature However raising the flow temperature will not raise the room temperature as the thermostatic valve will continue to limit the room temperature An excessive flow temperature will result in unnecessary heat losses in boiler and pipework At the same time the temperature in any room without thermostatic valves increases due to the higher boiler water temperatu
25. 01 6305706 01 6305715 www cfquadrant ie E mail sales O cfquadrant ie In the UK and IE Buderus is a brand name of Bosch Thermotechnology Ltd Bosch Thermotechnik GmbH Sophienstrasse 30 32 D 35576 Wetzlar www buderus de info O buderus de Buderus
26. 1 Inserting switching points You can interrupt heating phases by inserting switching points details weekday time temperature into an existing heating program Example The standard Family program provides constant heating on Fridays from 05 30 until 23 00 Insert two new switching points if for example you do not want to heat on Fridays from 10 00 to 13 00 Your modified program will be saved under the program name Own and the number of the heating circuit concerned A 1 2 05 30 23 00 B 1 2 A 05 30 10 00 13 00 23 00 7747 012 053 14 1RS Fig 16 Inserting switching points to interrupt a heating phase A Family program B New program Own program 2 1 Day mode 2 Night mode Buderus Logamatic 4323 Subject to technical modifications 51 oy Additional programming options Family program Monday at 05 30 21 C New switch point L Jolla New switch point Friday at B Q New switch point Friday at 10 00 Nau Q Buderus e Select a heating circuit gt Chapter 7 6 Example Heating circ 2 e Select the standard program for the chosen heating circuit gt Chapter 7 10 here Program select Family Release the Prog key to activate the selected standard program here Family program The display shows the selected standard program Turn the rotary selector once anti clockwise until New switch p
27. 2 Selecting manual mode Press either Day mode or Night mode to change to manual mode Press Day mode The Day mode LED illuminates Now your heating system is in constant day Se teat mode standard mode 21 C Constant day Press Night mode The Night mode LED illuminates Your heating system is now in constant night Set foom mode setback mode and operates at a lower room temperature 17 C Constant night LA USER NOTE If you have selected manual mode other automatic controls will also be switched off e g the summer wintertime changeover gt Chapter 7 13 e Buderus Logamatic 4323 Subject to technical modifications 21 ea Standard functions 6 4 Setting the room temperature With the flap closed you can adjust the room temperature with the rotary selector With the flap open you can also press Day mode or Night mode With the rotary selector you may select the room temperature in degree steps between 11 C day or 2 C night and 30 C The set temperature is displayed via an LED next to the rotary selector For temperatures below 15 C or above 25 C the or LED illuminates The factory setting for the day room temperature is 21 C The factory setting for the night room temperature is 17 C Any adjustment applies to all heating circuits allocated to the MEC2 programming unit gt
28. Extended functions 7 7 Adjusting the room temperature for another heating circuit Heat circ sel Heating circ 2 Actual room 19 5 C Outside temp 0 C Buderus Your heating system may be equipped with several heating circuits If you want to change the room temperature for a different heating circuit than the one last selected first select the required heating circuit Subject to the equipment level of your heating system the following heating circuits can be selected MEC2 heating circuits all heating circuits assigned to the MEC2 gt Chapter 7 8 Heating circuit O 8 If several heating circuits are assigned to the MEC2 the temperature for these heating circuits can only be adjusted for all Otherwise a fault message Setting Not possible MEC heat circ select will appear In such cases select MEC heat circ e Open flap Hold down the Heating circuit key and select the required heating circuit with the rotary selector here Heating circ 2 Release the Heating circuit key The displayed heating circuit is now selected As soon as heating circuit has been selected the display returns to the permanent display 32 Logamatic 4323 Subject to technical modifications Extended functions Press and hold down Temperature Initially the heating circuit will be displayed FS
29. Operating Instructions Control unit Logamatic 4323 For users Read carefully before use 7 747 017 278 03 2008 GB IE Buderus m Contents 1 SIMEPOGUCTION 2 25 be cee bebe cae ee oe sade ra ee OSE tees 4 2 What you should know about your heating system 5 3 Tips on energy efficient heating 0 o ooooooooo 10 O ac es as Be a we oe Oe ci es a es Se oases AS 11 4 1 Regarding these instructions 6622 c d6s a0 ee eee banc nea dawns as 11 4 2 Correct USe 52544 64 feet oe tae a oe ess aa SSE Se ees 11 4 3 Standards and guidelines directiveS 0 ooo es 11 44 SYMBOL esc are wee ae ea Oe ed Ge eee eee ek eee ee ee oe ee 11 4 5 Observe this information acc eae a ee ee ae Ca a OR Oe wd 11 4 6 Cleaning the control unit o o o o ooo 12 4 7 DISPOSAl osos ara a ea a Pee a RTS See eRe es 12 5 Controls and MEC2 programming unit 13 51 Co ntrolUMtCON OlS s acaso aaa dar erre duce ohh whe a 13 5 2 MEC2 programming unit gt 2 6 oe dee Ge e ra bea ees 14 5 3 Switching on ihe control Unit 222 oes ce eve aa OR eee ees 16 54 Switching off the control unit ecc rra ARA da 16 6 Standard functions 2 42 20 44544 obs coopera or 17 6 1 Simple op ratiOi s lt exar Roe ee ce Se Oe wes aras a HR 17 6 2 Permanent display 0 4 24454 65445 fe eee eee Se wee ee ee ewe ee 18 6 3 Selecting the operating mode 0 2 002 ee 19 6 4 Setting the
30. adiant energy occupants open fireplaces or similar external heat sources are then ignored If you utilise this type of control adjust the thermostatic radiator valves so that the required room temperature is achieved in the different rooms Room temperature dependent control Another possible heating control method is room temperature dependent control The control unit calculates the flow temperature based on the set and the actual room temperature To be able to utilise room temperature dependent control you need a room that is representative of your whole home All factors influencing the temperature in this reference room where the programming unit is located will also apply to all other rooms Not every home has a room that meets these requirements Pure room temperature dependent control has in such cases certain limitations Should you for example open a window in the room where the room temperature is measured the control unit will think that you have opened the windows in every room in your house and will begin to heat vigorously Or the reverse might apply You measure the temperature in a south facing room with different heat sources solar or other heat sources e g an open fireplace Now the control unit thinks that it is as hot in every room as in the reference room consequently the boiler output will be severely reduced so that for example the north facing rooms will become too cold With
31. ailable when one heating circuit is in standard heating mode day mode DHW is then heated 30 minutes before day mode of the heating circuit to be heated first to make it available at the selected time A 1 2 Lo 06 30 23 00 B 1 2 A A 06 00 22 00 c 1 y v 30 min 2 05 30 23 00 7 747 012 053 19 1RS Fig 13 DHW heating begins 30 minutes before the day mode of the first heating circuit and ends with the beginning of night mode of the last heating circuit Heating circ 1 Heating circ 2 DHW Day mode N OU gt Night mode If you require additional hot water you may at short notice heat DHW with the DHW heating once function gt Chapter 6 5 2 USER NOTE ai DHW will not be subject to a temperature setback if you operate one heating circuit in the Constant day mode and DHW is being heated by heat circs USER NOTE ai DHW will not be heated if you are operating all heating circuits in the Constant night mode and DHW is heated by heat circs Buderus 36 Logamatic 4323 Subject to technical modifications Extended functions 7 10 Selecting a standard program Time switch Program select Seniors Senior program Monday at 05 30 21 C The MEC2 programming unit is equipped with eigh
32. and MEC2 programming unit ey 5 Controls and MEC2 programming unit 5 1 Control unit controls 7 747 012 074 02 1RS Fig 4 Controls standard equipment level 1 ON OFF switch 2 Connection for external service equipment 3 F1 F2 fuses Fig 5 Fitted modules possible full complement Slot 1 e g FM442 heating circuit 1 heating circuit 2 Slot 2 e g FM442 heating circuit 3 heating circuit 4 Slot A ZM433 feed for external heat sources heating circuit O Slot B MEC2 CM431 MEC2 programming unit Slot 3 e g FM442 heating circuit 5 heating circuit 6 Slot 4 e g FM441 heating circuit 7 DHW DHW circulation pump or heating circuit 7 heating circuit 8 with module FM442 in slot 4 A O Wp rN Buderus Logamatic 4323 Subject to technical modifications 13 EN Controls and MEC2 programming unit 5 2 MEC2 programming unit The MEC2 programming unit is the central element with which you operate your Logamatic 4323 control unit Display The display gt Fig 6 4 indicates functions and operating values e g the actual room temperature Rotary selector The rotary selector gt Fig 6 5 is used to set new values and to scroll through the menus Keys You control the functions via the keys and the corresponding displays
33. anual switch should normally be set to AUT Positions 0 and W manual mode are special settings reserved for installers only Y The heating circuit pump is switched on The mixer is switched volt free and can be manually operated AUT The heating circuit operates in automatic mode 0 The heating circuit pump is switched off The mixer is switched volt free The control functions continue to be active Current functions are indicated by LEDs Buderus Fig 25 FM442 function module 1 Heating circuit x 2 Heating circuit y Display General fault e g on site fault sensor fault external faults wiring fault internal module fault manual mode The fault messages are displayed as plain text on the MEC2 programming unit LEDs for the following functions Display A Mixer opens hotter Display y Mixer closes colder Display Heating circuit in summer mode Display Heating circuit pump operational 70 Logamatic 4323 Subject to technical modifications 10 Troubleshooting Have your installer remedy all faults immediately All system faults are displayed on the MEC2 programming unit Report the fault by telephone to your installer Where necessary setthe module switches according to the instructions in Chapter 11 Provided your control unit is equipped with the above modules the following faults may be reported Heating circuit x Flow sensor DHW
34. ate evening Mo Fr 06 30 23 00 Sa 06 30 23 30 Late shift Su 07 00 23 00 Morning Mo Th 05 30 08 30 12 00 22 00 Fr 05 30 08 30 12 00 23 00 Part time work in the Sa 06 30 23 30 morning Su 07 00 22 00 Afternoon Mo Th 06 00 11 30 16 00 22 00 Fr 06 00 11 30 15 00 23 00 Part time work in the Sa 06 30 23 30 afternoon Su 07 00 22 00 Noon Mo Th 06 00 08 00 11 30 13 00 17 00 22 00 Fr 06 00 08 00 11 30 23 00 N h Sa 06 00 23 00 conati nome Su 07 00 22 00 Mo Th 06 00 08 00 16 00 22 00 Single Fr 06 00 08 00 15 00 23 00 9 Sa 07 00 23 30 Su 08 00 22 00 Seniors Mo Su 05 30 22 00 You can enter your own individual program here New If none of the standard programs suit you you may alter them have them changed by your installer or Own 1 enter a new heating program gt Chapter 8 2 This will be saved under Own and the number of the heating circuit Tab 1 Standard programs ON day mode OFF night mode Buderus 38 Logamatic 4323 Subject to technical modifications Extended functions 7 12 Modifying the standard program by moving switching points gt a E If the switching points e the times of a standard program at which the system changes over between day and night mode only partially suit you you may change them or ask your installer to change them fo
35. ature 41 Night mode 9 19 21 Automatic o e 50 O Automatic mode 19 20 Operating values 28 77 B Operation with faults 74 Boller a ce a ro ia RR a a 5 P Cc Permanent display 18 Central module 16 66 Pipework cese ar bo ee eg A 5 D R Daymode 9 19 21 Radiators 5 DHW circulation pump 44 Radio clock receiver 30 DHW cylinder 5 S Domestic hot water temperature 25 Setdate aa a a L L L L 30 E Setting summer mode 42 Emergency mode aoaaa 74 Setting the required room temperature 17 22 Setting the time 30 Factory setting ooa aaa 63 77 Setting winter mode 42 Factory set DHW temperature 24 Setup report y oa 77 Fault displays coo es es in ede os 71 Standard program ero sos e 37 Fault message Setting not possible 34 Standard settings E e a we ee 29 Fault message Time switch not possible 34 Switching point escocia 39 Fault messages oaoa a 72 Faults 0 ra i e e ee kw ee ee 71 Thermometer aoaaa 49 Feed function aa a 67 Thermostatic radiator valve 6 Feed pump aoaaa e e 66 Thermostatic valve o 6 Fitted modules
36. cient supply check that the external heat generator can deliver sufficient heating energy before operating the feed pump manually e Set heating circuit gt Fig 26 2 at selector Ei to manual Y i IN 2 USER NOTE Fig 26 ZM433 central module To ensure operational reliability mixer 1 Manual feed circuit switch circuits must not be fully closed 2 Manual switch heating circuit O In case of faults immediately notify your installer who will provide a professional service Inform your installer of the fault message displayed on the MEC2 Manually de couple the heating circuit mixer and position towards hotter or colder until the required room temperature has been achieved Buderus Logamatic 4323 Subject to technical modifications 75 E Operation in the event of a fault Manual mode FM441 and FM442 function modules accessories As described on page 75 for the central module you may also set the manual switches for DHW and or heating circuits of these modules temporarily to Y manual should there be a fault For DHW observe the following Before manually operating the primary pump on systems with external heat sources ensure that the heat source can deliver sufficient heat otherwise the DHW cylinder may cool down RISK OF SCALDING A from hot water WARNING f water which is too hot is supplied by the primary pump to the DHW cylinder never draw off DHW at
37. ded for service and maintenance functions If the manual switches are not set to automatic a corresponding message is displayed on the MEC2 programming unit and the fault indicator illuminates USER NOTE Never use the manual switches to switch off the system when you have to temporarily leave the installation Use the holiday function for this purpose gt Chapter 7 16 Buderus Fig 23 FM441 function module 1 Heating circ 2 DHW Display General fault e g on site fault sensor fault external faults wiring fault internal module fault manual mode The fault messages are displayed as plain text on the MEC2 programming unit LEDs for the following functions Display A Mixer opens hotter Display y Mixer closes colder Display Heating circuit in summer mode Display E DHW in night mode below the set temperature Display Heating circuit pump operational Display y L Cylinder primary pump active Display Z DHW circulation pump active Display 1 Thermal disinfection active 68 Logamatic 4323 Subject to technical modifications Modules and their functions EN Heating circuit and DHW function Manual heating circuit switch gt Fig 24 1 and DHW gt Fig 24 2 for heating circuit y for DHW supply oy USER NOTE a The manual switch should normally be set to AUT Positions 0 and W manual are special
38. ding to the factory settings Program select by heat circs or according to your own new switching program Program select own CP USER NOTE With the factory setting Program select by heat circs the DHW circulation pump is run 30 minutes prior to the first switching point of all heating circuits associated with this control unit and ends when the last heating circuit is switched off New switch point Buderus If your circulation pump is to work independently of the heating circuits you can enter your own new DHW circulation pump program as follows Example The DHW circulation pump is to run on all weekdays from 06 30 to 09 00 e Select a heating circuit gt Chapter 7 6 here DHW circulation e Select a program for the heating circuit DHW circulation gt Chapter 7 10 here Program select new The display shows a blank screen New switch point for the new switching point e Enter the switching points gt Chapter 8 2 USER NOTE Only after all three details day time temperature have been defined the new switching point will be automatically saved under Own program CP and the heating circuit number DHW circulation The saving function is not visualised on the display The display shows a blank screen New switch point for the next switching point Repeat this process for all required switching points Your DHW circulation pump will now operate according to your Own progra
39. e Adjusted outside temperature gt Fig 15 and after a delay automatically changes over between summer and winter mode C l 26 24 m 22 20 18 Y 6 14 2 12 i 1 10 j UA I 0 3 6 9 12 15 18 214 h x 7 747 012 073 04 1RS Fig 15 Current and adjusted outside temperature in comparison 1 2 x y Current outside temperature Adjusted outside temperature Time Outside temperature Summer mode The heating operation will be switched off with a delay that depends on the storage capability and the thermal insulation of the building if the Adjusted outdoor temperature exceeds the factory set changeover threshold of 17 C Summer mode is indicated on the display with symbol DHW heating remains operational Press Day mode if you want to heat at short notice in summer mode Logamatic 4323 Subject to technical modifications The heating system returns to automatic summer mode if you press key AUT Buderus 41 Winter mode DHW and central heating are operational if the Adjusted outside temperature falls below the factory set changeover threshold of 17 C Setting the automatic summer wintertime changeover Select the required heating circuit before calling up
40. e your input Press Weekday again to enter the month Press Weekday again to enter the year The respectively flashing item can be modified with the rotary selector Setting the time Hold down Time and select the required time with the rotary selector The time is set in one minute steps Release Time to save your input 30 Logamatic 4323 Subject to technical modifications Extended functions 7 6 Selecting a heating circuit Dn E Your heating system may be equipped with several heating circuits If you want to change a setting e g the heating program first select the heating circuit in which you want to change the setting Subject to the equipment level of your heating system the following heating circuits can be selected MEC2 heating circuits all heating circuits assigned to the MEC2 gt Chapter 7 8 Heating circuit O 8 DHW DHW circulation e Open flap Hold down the Heating circuit key and select the required heating circuit with aN L M H 0 the rotary selector here Heating circ 2 Release the Heating circuit key The displayed heating circuit is now selected Beak clas As soon as heating circuit has been selected the display returns to the tas permanent display Heating circ 2 Buderus Logamatic 4323 Subject to technical modifications 31
41. ect to technical modifications Feed function on if Manual switch feed pump gt Fig 22 1 USER NOTE 1 The manual switch should normally be set to AUT Positions 0 and W manual mode are special settings reserved for installers only Y The feed pump is switched on AUT The feed pump operates automatically O The feed pump is switched off The control functions continue to be active Heating circuit function Manual heating circuit Aur oi switch for heating circuit O g gt Fig 22 2 USER NOTE The manual switch should normally be set to AUT Positions 0 and W manual mode are special settings reserved for installers only Y The heating circuit pump is switched on The mixer is switched volt free and can be manually operated AUT The heating circuit operates in automatic mode 0 The heating circuit pump is switched off The mixer is switched volt free The control functions continue to be active Current functions are indicated by LEDs Modules and their functions ea Fig 22 ZM433 central module 1 Manual feed pump switch 2 Manual heating circuit switch Logamatic 4323 Subject to technical modifications Buderus 67 Ea Modules and their functions 9 2 FM441 function module accessory The FM441 module regulates one heating circuit and one DHW heating facility The manual switches on the module are only provi
42. emoving the fuse e Arrange for your installer to rectify any heating system faults immediately RISK OF INJURY SYSTEM DAMAGE caution from operator error Operator errors can result in injury and or material losses Ensure that only adults able to operate the appliance correctly have access to it Buderus Logamatic 4323 Subject to technical modifications 11 MEN safety RISK OF SCALDING For thermal disinfection the entire DHW warning System is set at the factory to heat up to 70 C start time Tuesday night at 01 00 e f required e g shift work your installer can alter the start time e Never open any hot water tap without mixing in cold water if the DHW circuit of your heating system is not equipped with a thermostatic mixer e As there is a risk of scalding at temperatures above approx 60 C ask your installer about the set DHW temperature SYSTEM DAMAGE IN from frost CAUTION Your heating system can suffer from frost damage if it is switched off e Drain your heating system and DHW pipe work at the lowest point to prevent frost damage 4 6 Cleaning the control unit e Only clean the control unit with a damp cloth 4 7 Disposal e Dispose of the control unit packaging in an environmentally responsible manner e The lithium battery in the CM431 module may only be replaced by your installer Buderus 12 Logamatic 4323 Subject to technical modifications Controls
43. er If the temperature is set incorrectly the underfloor heating system could overheat Manual switches are provided for manual mode on the programming unit and on the modules Each pump is activated in position W The mixers remain volt free and can be manually adjusted 11 1 Emergency mode If the electronics fail the control unit can operate in emergency mode In emergency mode all pumps continue to run and the mixers are volt free Mixers can be manually set In such cases notify your installer Buderus 74 Logamatic 4323 Subject to technical modifications Operation in the event of a fault 11 11 2 Heating with manual override In most cases faults are displayed on the MEC2 if they concern the control unit Please notify your installer of the fault displayed on the MEC Your installer can provide rapid assistance in remedying these faults using the information you provide If you cannot immediately contact your installer you may choose to select manual mode using the manual switch Manual mode Logamatic 4323 ZM433 central module Before making any adjustments for manual mode check the settings on the various modules for possible incorrect settings If the control system indicates a fault you may temporarily run your heating system manually e Switch on the control unit via the ON OFF switch e Setfeed circuit gt Fig 26 1 via selector oy to manual Y USER NOTE To prevent insuffi
44. er 8 4 Press AUT to select automatic mode After approximately three seconds the permanent display will appear again DHW circulation OFF The DHW circulation pump will not be controlled Pressing DHW switches the DHW circulation pump on for the duration of DHW heating once Press Night mode to switch off DHW circulation After approx three seconds the permanent display will appear again 44 Logamatic 4323 Subject to technical modifications Extended functions 7 16 Setting the holiday function If you are away for a long period you can use the holiday function to heat at a lower room temperature Example You are on holiday for the next five days and want to heat less during that time e g you want to operate heating circuit 2 with a reduced room temperature of 12 C USER NOTE As the holiday function is active immediately after completing your entry you should only enter this function on the day of your departure e Select a heating circuit gt Chapter 7 6 Example Heating circ 2 Enter holiday function Hold Holiday down and select the required number of days with the rotary selector here 5 Holiday days Release the Holiday key to save your input Set room The display shows 5 USER NOTE The Set room display only appears if the holiday setback type Hold room temp
45. erated independently of the first heating circuit Buderus Logamatic 4323 Subject to technical modifications 3 Tips on energy efficient heating 3 Tips on energy efficient heating Here are a few tips on how to heat economically without sacrificing convenience e Only heat if you need warmth Utilise the preset heating programs standard programs or those that have been tailored to your individual requirements e Air rooms correctly during the heating season Open windows three to four times a day for approx 5 minutes Having the window slightly open all the time does not provide an air change and wastes valuable energy e Close the thermostatic valves whilst ventilating Windows and doors are places where a lot of heat is lost Therefore check whether the doors and windows are correctly sealed Shut your roller shutters if installed at night O Never position large objects such as a sofa or a desk immediately in front of radiators maintain a clearance of at least 50 cm Otherwise the heated air cannot circulate and heat the room adequately e In rooms you occupy during the day you can for example set a room temperature of 21 C whilst 17 C may be sufficient at night To achieve this use the standard heating mode day mode and the setback mode night mode gt Chapter 6 Never overheat rooms overheated rooms are unhealthy plus they waste money and energy If you reduce the day room temperat
46. g mode 11 Enter DHW temperature reheating 4 Automatic heating mode in acc with a time switch 12 Set the time 5 Constant setback mode 13 Change temperature values 6 Enter the day of the week 14 Summer wintertime changeover 7 Enter holidays 15 Back to the standard display 8 Select standard display 16 Select a time switch program 17 Select heating circuits DHW circuit Buderus Logamatic 4323 Subject to technical modifications 15 NE Controls and MEC2 programming unit 5 3 Switching on the control unit e Check that the control unit ON OFF switch gt Fig 8 1 and the manual switches on the fitted modules gt Fig 8 2 are set to I and AUT e Switch the control unit on by setting the ON OFF switch to I gt Fig 8 1 After approximately two minutes all modules fitted to the control unit are recognised and the standard display is shown 7 747 012 073 02 1RS Fig 8 ON OFF switch 1 ON OFF switch 2 Manual switch on the module 5 4 Switching off the control unit e Switch the control unit off by setting the ON OFF switch to 0 gt Fig 8 1 e When there is a risk Isolate the heating system from the mains supply with the emergency stop upstream of the boiler room or by removing the fuse Buderus 16 Logamatic 4323 Subject to technical modifications 6 Standard functions 6 1 Simple operation y All z a OJO 192206 O o
47. gram A New heating program Own program 2 Monday Friday B Saturday Sunday Day mode 2 Night mode e Select a heating circuit gt Chapter 7 6 Example Heating circ 2 e Select the standard program Program select new for this heating circuit gt Chapter 7 10 The display shows the blank mask New switch point Logamatic 4323 Subject to technical modifications New switch point Monday Friday at New switch point Monday Friday at 05 00 y OLIOLIO New switch point Monday Friday at 05 00 21 C y Additional programming options EN Entering the first switching point Monday Friday 05 00 21 C You can select days individually or in blocks Monday Thursday Monday Friday Saturday Sunday Monday Sunday Hold down Weekday and select the required date or block with the rotary selector here Monday Friday Release Weekday to save your input Hold Time down and select the required time with the rotary selector here 05 00 The display shows the new switching point Release Time to save your input Hold Temp down and select the required temperature with the rotary selector here 21 C You cannot just enter an arbitrary temperature here The factory set day and night setback temperatures are available which can which can be modified gt Chapter 6 4 Release the Temp key t
48. ifications Family program Delete Monday 22 00 Own program 2 Monday at 17 00 21 C Additional programming options a The bottom line shows eight blocks that are deleted from left to right in intervals of one second The switching point has been deleted when all the blocks have been erased The deleting process is terminated if you release the keys before the blocks are erased Simultaneously release Holiday and Display to save your input The display shows the next switching point The new program that has been modified by the deletion will be saved under Own program and the relevant heating circuit number here 2 You can call up your new program by pressing Prog and turning the rotary selector gt Chapter 7 10 Press Back to return to the permanent display Buderus Logamatic 4323 Subject to technical modifications 55 En Additional programming options Buderus 56 Midday program Monday at 06 00 21 C 8 1 3 Deleting a heating phase A heating phase consists of two switching points a start and a stop point If you wish to delete a heating phase both switching points must be deleted Example In the Midday program the heating phase on Monday from 11 30 to 13 00 is to be deleted for heating circuit 2 to create a heating pause between 08 00 and 17 00 Your modified p
49. ilise this option consider the following At what time in the morning should your home be warm Is this time dependant on the day of the week Are there days when heating is not required during the day From what time in the evenings do you no longer need to heat This may also depend on the day of the week The length of time your heating system takes to heat up individual rooms may vary This will be subject to the outside temperature the building insulation and the room temperature setback The Optimisation function of the programming unit calculates the various heat up times Ask your installer whether this function has been activated If so all you need to do is enter the times at which your home should be warm With the programming unit Buderus offers eight different preset heating programs as standard programs 05 30 22 00 7 747 012 053 16 1RS Fig 12 Example for a standard program here Family program from Monday to Thursday 1 Day mode 2 Night mode USER NOTE After commissioning check whether the selected heating program suits your lifestyle If not several options are available for matching the heating program to your individual requirements Buderus Logamatic 4323 Subject to technical modifications 35 7 9 2 Time switch program for DHW You may enter your own heating program for DHW heating This saves you energy Set the times so that DHW is only av
50. ing instructions relate to these modules All other modules are explained in separate technical module documentation Buderus Logamatic 4323 Subject to technical modifications 65 NN Modules and their functions 9 1 ZM433 central module standard equipment level The ZM433 module regulates one feed pump to transfer heat in the case of a heat demand from external heat sources to the system This module also controls one heating circuit with mixer The manual switches on the module are only provided for service and maintenance functions If the manual switches are not set to automatic a corresponding message is displayed on the MEC2 programming unit and the fault indicator illuminates USER NOTE Never use the manual switches to switch off the system when you have to temporarily leave the installation Use the holiday function for this purpose gt Chapter 7 16 Fig 21 ZM433 central module 1 Selecting a feed pump 2 Heating circuit with mixer Display General fault e g on site fault sensor fault external faults wiring fault internal module fault manual mode The fault messages are displayed as plain text on the MEC2 programming unit LEDs for the functions Display A Mixer opens hotter Display Mixer closes colder y Display Heating circuit in summer mode a Display Feed or heating circuit pump runs Buderus 66 Logamatic 4323 Subj
51. ions The extended functions are explained in this chapter You need the extended functions to be able to change the factory settings of your heating system You can use the following functions Display the current operating values of your heating system Set the time Set date Set heating circuits Select a heating program Set the room temperature for additional heating circuits The keys for the extended functions are located behind the flap of the MEC2 programming unit 7 1 Keys for extended functions a Ej 8 Q se MR ED Pee E va 9 8 7 747 012 073 01 1RS Fig 11 Keys for the extended functions Enter the day of the week Enter holidays Select standard display Set the time Change temperature values Summer wintertime changeover Return to the standard display Select a time switch program O ON OO BO DN Select heating circuits DHW circuit Buderus Logamatic 4323 Subject to technical modifications 27 Extended functions 7 2 Controlling the extended functions jo The extended functions provide access to a further control level At this level proceed according to the Push and turn principle The control procedure is always similar e Open flap Hold the required key down e g the Time key and simultaneously turn the rotary selector By turning the rotary selector you modify
52. is too low Correct the set room if DHW is heated by external heat source Buderus External heat sources supply insufficient heating energy Room cool temperature The DHW supply runs too long Check DHW heating Heat sources deliver insufficient heating Check heat so rc e energy or are shut down The room temperature sensor is incorrectly Sensor adjustment adjusted The DHW is set to the wrong temperature ae it in Ten SEE DHW cool a e The switching program is incorrectly set up O program DHW too cold Check heat source 72 Logamatic 4323 Subject to technical modifications 10 2 Troubleshooting Troubleshooting 10 MEC2 message Effect Remedy DHW stays cold DHW is too cold Set DHW switch on module ZM424 FM441 or FM445 to manual Notify your installer DHW stays cold during DHW heating via Logamatic EMS DHW is too cold Notify your installer Remote control Fault External sensor fault The programming unit works with the last values set on the MEC2 programming unit The heating system may heat with higher temperatures to safeguard the DHW flow Notify your installer Notify your installer Tell your installer which temperature sensor is faulty Flow sensor fault It may get too hot If necessary manually adjust the mixer Notify your installer Heating circuit x communication Fault No communication between
53. ly possible if a room temperature is being captured When changing from total shutdown to reduced heating the total shutdown will be activated subject to outside temperature when the actual outside temperature exceeds the set outside temperature What you should know about your heating system EA What are heating circuits A heating circuit describes the circuit taken by the heating water from the boiler via the radiators and back again gt Fig 1 page 6 A simple heating circuit comprises a heat source a flow line a radiator and a return line A pump installed in the flow line circulates the heating water Several heating circuits may be connected to one boiler for example one heating circuit for supplying radiators and a further circuit for supplying an underfloor heating system In this case the radiators are supplied at a higher flow temperature than the underfloor heating system The supply of different flow temperatures to different heating circuits can be achieved by e g installing a three way valve between the boiler and the underfloor heating circuit Using an additional temperature sensor in the flow of the heating circuit to be supplied sufficient cold return water is mixed via a three way valve into the hot flow water to achieve the required lower temperature It is important to note that heating circuits with three way valves require an additional pump This pump enables the second heating circuit to be op
54. m CP You can call up your new Own program CP by pressing Prog and turning the rotary selector 64 Logamatic 4323 Subject to technical modifications 9 Modules and their functions All modules are shown here that are or can be fitted in your Logamatic 4323 control unit Modules and their functions EN Control unit Logamatic 4323 MEC2 programming unit O CM431 controller module O ZM433 central module O Feed for external heat sources heating circuit FM441 function module x Heating circuit DHW FM442 function module 2 heating circuits A FM443 function module Solar circuit X FM444 function module mods Alternative heat source a FM445 function module x LAP LSP primary system FM446 function module X EIB interface FM448 function module Central fault message x FM456 function module x1 Cascade 2 wall mounted boilers FM457 function module x1 Cascade 4 wall mounted boilers FM458 function module x1 Strategy module Tab 2 Standard equipment level and optional module equipment 1 May only be connected to the first control unit address 0 or 1 O standard equipment level X Accessory Along with the ZM433 central module which is part of the standard equipment level of the Logamatic 4323 control unit most function modules used e FM441 and FM442 function modules will be described on the following pages The MEC2 preset menus in these operat
55. minated if you release the Time key prematurely or turn the rotary selector back In that case all switching points for the heating phase remain active Release Time to save your input The new program that has been modified by the connection process will be Own program 2 saved under Own program and the relevant heating circuit number here 2 You can call up your new program by pressing Prog and turning the rotary Monday selector gt Chapter 7 10 at 22 00 17 C Press Back to return to the permanent display Buderus Logamatic 4323 Subject to technical modifications 59 En Additional programming options 8 2 Creating a new heating program Buderus 60 L 0909 AUT e o 9 o O o O o Eo O 15 o o C o p New switch point You may enter up to 42 switching points per week and heating circuit to create a new heating program A single switching point comprises three details weekday time and temperature The newly created program will be saved under Own program and the appropriate heating circuit number Example Monday Friday from 05 00 21 C from 21 00 17 C Saturday Sunday from 09 30 21 C from 23 30 17 C A 1 21 C 17 C 05 00 21 00 B 4 21 C 2 17 C 09 30 23 30 7 747 012 053 10 1RS Fig 20 New heating pro
56. n With your purchase of this Logamatic control unit you have acquired a product that promises you easy control over your heating system It offers you optimum heating convenience and minimum energy consumption The control unit enables you to operate your heating system so that you can combine your economical and ecological aspirations However your personal comfort is always priority The control unit which is regulated by the MEC2 programming unit is set up at the factory for immediate use Naturally you or your installer can modify these default settings and adapt them to your individual requirements The MEC2 programming unit is the central control unit Some functions which you may need are located behind a flap The keys behind this flap enable you to make various adjustments The control concept is Push and turn This control unit speaks your language Your heating system offers a wealth of further useful functions Some examples of these are the automatic summer wintertime changeover the party pause function the holiday function DHW heating at the push of a button Buderus Logamatic 4323 Subject to technical modifications What you should know about your heating system EN 2 What you should know about your heating system Why should you become more familiar with your heating system Modern heating systems offer you many functions for saving energy without sacrificing comfort
57. o MEC heat circ simultaneously Setting the room temperature Setting the summer wintertime changeover Selecting the operating mode Setting the holiday function Setting the party or pause function If you have selected an individual heating circuit that is assigned to the MEC2 and you want to make one of the above adjustments the fault message Setting Not possible MEC heat circ select will appear Select MEC heat circ to program these settings gt Chapter 7 6 Individual heating circuits The following adjustments can only be implemented for each individual heating circuit separately Selecting the standard program Modifying the standard program by moving switching points Inserting or deleting switching points Deleting or connecting heating phases Creating a heating DHW or DHW circulation pump program If you have selected MEC heat circ and you want to make one of the above adjustments the fault message Time switch Not possible Single heat circ select will appear Enter these settings for each heating circuit separately gt Chapter 7 6 34 Logamatic 4323 Subject to technical modifications 7 9 Selecting and modifying a heating program 7 9 1 What is a heating program A heating program provides the automatic changeover of operating mode day and night mode at fixed times This automatic changeover is effected via a time switch Before you ut
58. o save your input Buderus Logamatic 4323 Subject to technical modifications 61 En Additional programming options New switch point Buderus Only after all three details day time temperature have been set the new switching point will be automatically saved under Own program and the heating circuit number here 2 The saving function is not visualised on the display The display shows a blank screen New switch point for the next switching point e Enter the second switching point Monday Friday 21 00 17 C e Enter the third switching point Saturday Sunday 09 30 21 C e Enter the fourth switching point Saturday Sunday 23 30 17 C To enter the second to fourth switching points you only need to repeat the previous steps Only after all switching points have been correctly entered press Back to return to the permanent display Your heating program will now operate according to your Own program You can call up your new Own program by pressing Prog and turning the rotary selector 62 Logamatic 4323 Subject to technical modifications Additional programming options EN 8 3 Creating a new DHW program You may operate DHW heating either according to the factory settings Program select by heat circs or according to your own new switching program Program select own DHW USER NOTE With the factory setting Program select by heat circs DHW is heated
59. oint is displayed The display shows the blank mask New switch point for the new switching point Hold down Weekday and turn the rotary selector to the required day here Friday You can select days individually or in blocks Monday Thursday Monday Friday Saturday Sunday Monday Sunday Release the Weekday key to store your input Hold Time down and select the required time with the rotary selector here 10 00 Friday at 10 00 is now set as the new switching point Release Time to save your input Hold Temp down and select the required temperature with the rotary selector here 17 C 52 Logamatic 4323 Subject to technical modifications New switch point Friday at 10 00 17 C Additional programming options MEN The display shows the set value Release the Temp key to save your input USER NOTE You cannot just enter an arbitrary temperature here The factory set day and night setback temperatures are available which can be modified gt Chapter 6 4 USER NOTE Only after all three details day time temperature have been defined for the new switching point will it be automatically saved under Own program and the heating circuit number here 2 This saving is not shown on the display The display shows the blank screen New switch point for the next switching point New switch point J
60. on of fuel and electrical energy The control unit starts the heat source boiler and burner and pumps when heat or DHW is required Also your heating control unit monitors different variables that influence the room temperature and compensates for these variables What does the control unit calculate Advanced control units calculate the temperature required within the boiler the so called flow temperature subject to the outside temperature The relationship between the outside temperature and the flow temperature is described as the heating curve The lower the outside temperature the higher the flow temperature The control unit can operate in three control modes weather compensated control room temperature dependent control weather compensated control with room temperature hook up What you should know about your heating system EN C 80 lo 60 y 50 40 30 20 20 15 10 5 0 5 10 15 il x 22 C 7 747 012 073 03 1RS Fig 3 Heating circuit curve example x Outside temperature y Flow temperature Buderus Logamatic 4323 Subject to technical modifications 2 What you should know about your heating system Weather compensated control With weather compensated control only the outside temperature captured by the outside temperature sensor is decisive for the flow temperature level Room temperature fluctuations through the suns r
61. r or has activated the Therm disinfect function and the heating water circuit of your heating system is not equipped with a thermostatically controlled mixer Please note that fittings too can get very hot e in such cases only ever draw off mixed water hot and cold You can change the DHW temperature as follows Hold down the DHW key and select the required DHW temperature with SS the rotary selector Release the DHW key The newly selected DHW temperature is saved within approx 2 seconds The permanent display will then appear again 60 C USER NOTE 1 For thermal disinfection the DHW will be heated to at least 60 C once or twice per week to kill off possible bacteria e g legionnella 2 Y Ss Buderus Logamatic 4323 Subject to technical modifications 25 ea Standard functions DHW actual Reheating Buderus 26 6 5 2 Heating DHW once Only a limited amount of hot water remains in the DHW cylinder if the DHW LED illuminates Should you require a larger amount of DHW proceed as follows Press DHW The DHW LED flashes and heating DHW once commences Subject to the size of the DHW cylinder and the boiler output DHW will be available after approx 10 to 30 minutes With instantaneous water heaters or combination boilers DHW is available almost immediately Logamatic 4323 Subject to technical modifications Extended functions 7 Extended funct
62. r you The modified standard program is saved under Own and the number of the heating circuit The heating program memory is available for this ED ge The example below shows how the switching points of the standard program ED Sl 2s Family can be changed for the days Monday to Thursday A 1 2 05 30 22 00 B 1 2 05 30 06 30 22 00 23 00 7 747 012 053 15 1RS Fig 14 Changing the switching points from 05 30 to 06 30 and from 22 00 to 23 00 example A Family program B New program Own program 2 1 Day mode 2 Night mode e Open flap e Select a heating circuit here Heating circ 2 gt Chapter 7 6 Hold down PROG and select the required standard program with the rotary O selector Release the PROG key Time switch Program select Family The first switching point Monday 05 30 appears Family program Monday at 05 30 21 C tau J Buderus Logamatic 4323 Subject to technical modifications 39 N m gt lt O 3 o O o a 3 o ey Oo gt o Q Own program 2 Monday at 06 30 21 Ya Buderus OO Hold down Time and select the required time with the rotary selector e g 06 30 Release the Time key The newly adjusted time for the ON switching point is now saved The modified switching point will be saved under the Own program and the number of the heating circuit here 2 Continue to turn
63. re Logamatic 4323 Subject to technical modifications Why do need a time switch Advanced heating systems are equipped with a time switch to save energy With a time switch you can set up an automatic changeover between two different room temperatures subject to time This enables you to set a reduced room temperature at night or other times when a reduced temperature is sufficient whilst operating your heating system with the standard room temperature during the day You have four options to reduce the room temperature via the control unit Upon request your installer will select and set up one of these options total shutdown no room temperature regulation reduced room temperature a reduced room temperature will be regulated change between total shutdown and reduced heating subject to room temperature change between total shutdown and reduced heating subject to outside temperature With total shutdown of the heating system no pumps or other system components are controlled Heating only recommences if the heating system is subject to a risk of frost Heating with reduced room temperature night mode only differs from the standard heating mode day mode through a lower flow temperature When changing from total shutdown to reduced heating the total shutdown will be activated subject to room temperature when the actual room temperature exceeds the set room temperature This function is on
64. reset room temperature Hold down Day mode and simultaneously open the flap of the MEC2 The party function is activated Continue to hold Day mode down and turn the rotary selector until the required number of hours is displayed here 4 The display shows the party function together with the set number of hours Release the Day mode key The party function starts immediately After the set time has expired the heating system returns to automatic heating mode If you want to cancel party function call up party function as described above and turn the rotary selector to 0 hours 7 19 Setting the pause function jo Pause function 3 hours Buderus This function only applies to heating circuits to which the MEC2 has been assigned as a remote control unit MEC heat circ All heating circuits without an MEC2 continue to operate normally Enter the length of time the system should heat to the preset room temperature Example You are about to leave your home for three hours and would like to heat less whilst you are away Hold down Night mode and simultaneously open the flap of the MEC2 The pause function is activated Continue to hold down Night mode and turn the rotary selector until the required number of hours is displayed here 3 The display shows the pause function together with the set number of hours Release the Night mode key The pause function starts immediately After the se
65. rogram will be saved under the program name Own and the number of the heating circuit concerned A 1 06 00 08 00 11 30 13 00 17 00 22 00 B 1 p 3 2 06 00 08 00 17 00 22 00 7 747 012 053 12 1RS Fig 18 Deleting a heating phase A Midday program B New program Own program 2 1 Day mode 2 Night mode 3 Delete e Select a heating circuit gt Chapter 7 6 Example Heating circ 2 e Select the standard program for the chosen heating circuit gt Chapter 7 10 Example Midday program The first switching point start point Monday at 06 00 at 21 C will be displayed The displayed temperature depends on the set room temperature Logamatic 4323 Subject to technical modifications O Midday program Monday at 11 30 21 C Switch period is deleted Own program 2 Monday at 17 00 gt 21 C Additional programming options a Turn the rotary selector to the start point of the heating phase you want to delete here 11 30 Hold down Time and turn the rotary selector to the stop point of the heating phase you want to delete here 13 00 If you have selected the stop switching point of the heating phase you want to delete the bottom line will show eight blocks that are deleted from left to right in intervals of one second The heating phase will have been deleted when all the blocks have been erased
66. settings reserved for installers only Fig 24 FM441 function module Y The heating circuit pump or primary pump 4 is switched on The mixer is switched volt free and can be manually operated The DHW circulation pump is switched off Manual heating circuit switch 2 Manual DHW switch AUT The heating circuit or the DHW circuit operates in automatic mode 0 The heating circuit pump or the DHW cylinder primary pump as well as the DHW circulation pump are switched off The mixer is switched volt free The control functions continue to be active Current functions are indicated by LEDs Buderus Logamatic 4323 Subject to technical modifications 69 Ea Modules and their functions 9 3 FM442 function module accessory The FM442 module regulates two independent heating circuits with mixer Several FM442 modules can be utilised in your control unit The manual switches on the module are only provided for service and maintenance functions If the manual switches are not set to automatic a corresponding message is displayed on the MEC2 programming unit and the fault indicator illuminates USER NOTE Never use the manual switches to switch off the system when you have to temporarily leave the installation Use the holiday function for this purpose gt Chapter 7 16 Heating circuit function e CENI Manual heating circuit switch e g for heating circuit 1 or 2 USER NOTE The m
67. t different preset heating programs that act as standard programs See the following page for a summary of the preset times of the standard programs Please check which standard program best meets your requirements First check the number of switching points and then the relevant times The Family program is preset at the factory e Open flap e Select a heating circuit gt Chapter 7 6 Hold down PROG First the heating circuit for which you want to select a standard program is displayed Approximately two seconds later the designation of the currently selected standard program will appear Select the required standard program with the rotary selector here Seniors Release the PROG key The displayed program is now selected The display shows the program designation and the first switching point for the selected heating program here Senior program Press Back to return to the permanent display USER NOTE Switching programs are only effective in automatic mode gt Chapter 6 3 1 Buderus Logamatic 4323 Subject to technical modifications 37 Extended functions 7 11 Summary of standard programs Program designation Weekday ON OFF ON OFF ON OFF Family Mo Th 05 30 22 00 Fr 05 30 23 00 Sa 06 30 23 30 factory setting Su 07 00 22 00 Mo Th 04 30 22 00 E OS Fr 04 30 23 00 Early shif Sa 06 30 23 30 any son Su 07 00 22 00 L
68. t time has expired the heating system returns to automatic heating mode If you want to cancel the pause function call up the pause function as described above and turn the rotary selector to 0 hours 48 Logamatic 4323 Subject to technical modifications 7 20 Room temperature matching USER NOTE This function is only available if the MEC2 is fitted within the living space If the room temperature shown on the display varies from the actual temperature measured with a thermometer the display value can be adjusted using Calibration MEC t y Calibration MEC Room temperature Correction 0 0 C Y D Q Calibration MEC Room temperature Correction 0 5 C o The factory setting is O C The possible correction range extends from 5 C to 5 C Example Displayed room temperature 22 C actual room temperature 22 5 C e Open flap Simultaneously press and then release Display and Temp The display shows Calibration MEC Hold down Temp and turn the rotary selector to the required value here 0 5 C The display shows the set value Release the Temp key to save your input Press Back to return to the permanent display The display shows the corrected temperature 22 5 C Buderus Logamatic 4323 Subject to technical modifications 49 Extended functions 7 21 Automatic maintenance message Note maint message
69. t which the heating system changes from day mode to night mode and vice versa are factory set via standard programs gt Chapter 7 10 However you or your installer can modify these settings gt Chapter 7 12 Manual mode For example if you want to heat longer late in the evening or not quite as early in the morning you can set the day and night mode manually gt Chapter 6 3 2 You can also use manual mode to heat on cooler days when the system is operating in summer mode Buderus Logamatic 4323 Subject to technical modifications 19 ea Standard functions Set room 21 C Automatic day Buderus 6 3 1 Selecting automatic mode In automatic mode your heating system will operate with the time switch program i e DHW and central heating at preset times gt Why do need a time switch page 9 Example Enabling automatic mode Press AUT The AUT LED illuminates automatic mode is active In addition either the Day mode or the Night mode LED will illuminate This is subject to the set times for day and night mode Automatic day and night mode At fixed times central heating is provided or the room temperature is set back 21 C 9 17 C 05 30 22 00 7 747 012 053 18 1RS Fig 9 Changeover from day and night mode at fixed times example 1 Day mode 2 Night mode 20 Logamatic 4323 Subject to technical modifications Standard functions 6 6 3
70. the rotary selector until the next switching point that you want to change is displayed The OFF switching point for Monday appears Now you can modify the time for the OFF switching point Hold down Time and select the required time with the rotary selector e g 23 00 Release the Time key The newly adjusted time for the OFF switching point is saved Next switching point Continue to turn the rotary selector until the next switching point is displayed The next switching point Tuesday 05 30 appears Also change the following switching points to 06 30 and 23 00 The system will now heat from 06 30 to 23 00 Monday to Thursday Press Back to return to the permanent display Ela O USER NOTE You can change the weekday if you press Weekday instead of Time You can change the switching state ON OFF by pressing Display instead of Weekday or Time The operating mode determines the switching state ON day mode OFF night mode e Ensure that a stop point is associated with every start point The modified standard program is saved under Own and the number of the heating circuit 40 Logamatic 4323 Subject to technical modifications Extended functions 7 13 Setting the summer wintertime changeover In addition to the outside temperature your Logamatic 4323 control unit considers the ability of the building to store heat and its thermal insulation and from this creates th
71. the summer wintertime changeover You may select either an individual heating circuit or all circuits assigned to the MEC2 e Select a heating circuit gt Chapter 7 6 Example Heating circ 2 Setting the changeover temperature Hold down Su Wi The display briefly shows the heating circuit Then turn the rotary selector to the required changeover temperature below which you want to heat here 18 C 4 Q The display shows the set changeover temperature Summen Winter Release the Su Wi key to save your input Summer from 18 C AY Setting up constant summer mode e Select a heating circuit gt Chapter 7 6 Example Heating circ 2 Hold down Su Wi The display briefly shows the heating circuit Then turn the rotary selector to a changeover temperature below 10 C Q The display shows Constant summer Summer WINE Release the Su Wi key to save your input Your heating system will constantly operate in summer mode Constant summer N Y Setting up constant winter mode e Select a heating circuit gt Chapter 7 6 Example Heating circ 2 Hold down Su Wi The display briefly shows the heating circuit Then turn the rotary selector to a changeover temperature above 30 C 4 Q The display shows Constant winter Summer Winter Release the Su Wi key to save your input Your heating system will constantly operate in winter mode Constant winter Y
72. tion of Conformity on the internet at www buderus de konfo or request a copy from your local Buderus sales office 4 4 Symbol key Two levels of danger are identified and signalled by the following terms RISK TO LIFE gt Identifies possible risks associated with a product that might lead to serious injury WARNING y s or death if appropriate care is not taken RISK OF INJURY SYSTEM DAMAGE E Indicates a potentially dangerous situation that could lead to minor or moderately serious injuries or to material losses USER NOTE User tips for the optimum utilisation and adjustment of the appliance plus other useful information a Safety EN 4 5 Observe this information e Only operate the control unit as intended and if it is in perfect working order e Let your installer instruct you thoroughly in the operation of this system Read these operating instructions carefully e Only enter or change the operating values detailed in these instructions Other entries alter the control programs of the heating system and can lead to incorrect system functions Maintenance and repairs as well as troubleshooting should only be carried out by authorised and qualified personnel WARNING Never open the control unit RISK TO LIFE from electric shock e in an emergency switch off the control unit e g with the heating system emergency stop or isolate the heating system from the mains supply by r
73. u wish to adjust the day mode proceed as described above but instead hold down the Day mode key EU Buderus Logamatic 4323 Subject to technical modifications 23 ea Standard functions 6 5 Heating domestic hot water Buderus The programming unit also offers you the option of heating DHW in an energy conscious manner For this purpose DHW heating can be selected via a time switch You may select between the set values for DHW and OFF to switch DHW heating off To save energy DHW heating will be switched off outside the programmed times i e DHW is not heated in night mode DHW heating is factory set to 60 C in automatic mode 60 C 05 30 09 00 18 00 21 00 7 747 012 053 17 1RS Fig 10 Example DHW heating 1 Day mode 2 Night mode 3 OFF We recommend heating the DHW cylinder once in the morning before central heating begins and reheating once in the evening if necessary gt Fig 10 USER NOTE The DHW temperature will have fallen below the set value if the green DHW LED illuminates 24 Logamatic 4323 Subject to technical modifications Standard functions 6 6 5 1 Setting the DHW temperature RISK OF SCALDING A The DHW cylinder temperature is preset to 60 C There is a risk of scalding WARNING from hot water if your installer has set the DHW temperature highe
74. ure for example from 21 C to 20 C you will save approx six percent of your heating bill e Also heat in an energy conscious manner in spring and autumn and utilise the summer wintertime changeover gt Chapter 7 A pleasant ambience not only depends on the room temperature but also on the relative humidity The drier the air the cooler a room feels You can optimise the relative humidity with house plants You can also save money when heating DHW Only operate the DHW circulation pump via a time switch Research has shown that it is generally sufficient if the DHW circulation pump is started every 30 minutes for three minutes e Arrange for your installer to service your heating system annually Buderus 10 Logamatic 4323 Subject to technical modifications 4 Safety 4 1 Regarding these instructions These operating instructions contain important information regarding the safe and correct operation of the Logamatic 4323 control unit 4 2 Correct use The Logamatic 4323 control unit is designed to control and monitor heating systems with different types of boiler in apartment buildings residential developments and buildings with medium to large heat demand 4 3 Standards and guidelines directives The design and operation of this product C 4 conform to European Directives and the supplementary national requirements Its conformity is demonstrated by the CE designation You can view the Declara
75. will appear If you hold a key down you can change a value using the rotary selector The new value will be accepted and stored after you release the key You can reach certain functions such as day room temperature night room temperature and possibly the DHW temperature or the automatic heating mode directly via the corresponding keys gt Fig 6 1 to 3 and 6 Behind a flap gt Fig 6 7 other keys are available for additional settings e g for entering days or setting the time The unit automatically returns to the standard display if no entry is detected for some time Buderus L do o Lo MA f 7 f Y 7 Fig 6 N Oo of Ff WD MEC2 programming unit Constant setback mode Automatic heating mode in acc with a time switch Constant heating mode Display Rotary selector Enter DHW temperature reheating Flap for the keypad of control level 2 14 Logamatic 4323 Subject to technical modifications Controls and MEC2 programming unit ey The central MEC2 programming unit 68 Es Sl Ph eee oo 17 16 7 747 012 074 01 1RS Fig 7 MEC2 programming unit 1 Display 9 Radio clock signal disable in the UK 2 Rotary selector 10 Display for set room temperature 3 Constant heatin

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