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Operating Instructions Logamatic 4121, 4122 and 4126

1. Your modified program will be saved under the program name Own and the number of the heating circuit A 1 2 06 00 08 00 11 30 13 00 17 00 22 00 B 1 gt 3 06 00 08 00 11 30 22 00 7 747 012 053 11 1RS Fig 18 Connecting two heating phases A Midday program New program Own program 2 Day mode Night mode Turn from 13 00 to 17 00 on O 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 Midday program Monday at 06 00 21 C Turn the rotary selector to the stop point of the first heating phase you want IES 0 to connect with another here 13 00 Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 61 ea Additional programming options Midday program Monday at 13 00 17 C Switch period is combined Own program 2 Monday at 22 00 17 C Buderus The display shows the stop point to be connected Hold down Time and turn the rotary selector clockwise until the start point of the second heating phase i e the next consecutive heating phase is displayed which you wish to combine with the first heating p
2. Logamatic 4121 4122 and 4126 Subject to technical modifications 33 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 Heating circuit and select the required heating circuit with the rotary selector here Heating circ 2 Release Heating circuit The displayed heating circuit is now selected As soon as the heating circuit has been selected the display returns to the permanent display 34 Logamatic 4121 4122 and 4126 Subject to technical modifications Extended functions Press
3. Address Incorrect module slot 2 Address Incorrect module slot A Address Unknown module slot 1 Address Unknown module slot 2 Address Unknown module slot A Buderus DHW DHW Heating circuit x DHW DHW DHW DHW DHW DHW Boiler x Low loss header Boiler x Solar Inert anode Ext fault input In manual mode In manual mode Primary pump in manual mode Secondary pump in manual mode HE sensor Sensor OFF Sensor ON No connection Flow sensor Three way valve Cylinder X in manual mode 78 Logamatic 4121 4122 and 4126 Subject to technical modifications 11 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 Troubleshooting fa Observation Possible cause s Measure Control unit remains blank or does not function ON OFF switch set to OFF No power supply ON OFF switch set to ON Check mains electrical fuse Heating system emergency stop switch set to ON MEC2 incorrectly plugged in contact Fit MEC2 correctly MEC2 display dark problems Actual room temperature for the Check the heating circuit respective heating circuit is incorrectly assignment displayed Control unit operates in setback mode Check time and heating program and modify if required Set room te
4. 21 Automatic mode 20 21 Day wick aoe a ee D a 22 B Manual 0004 20 22 AS 5 Night sosa i a a n wmi a a ee 22 D Operatingvalues 29 84 Daymode o 9 20 P DHW circulationpump 47 Permanent display 19 30 DHW cylinder 66 ccoo lt 5 Pipework s sece sa r ee 5 DHW function 0 71 76 R DHW heating o 25 Radiator execu Pat a ae A a da 5 DHW temperature 26 Radio receiver o 31 Displayed faults 78 Room temperature E matching stats ee woe E A 52 Emergency mode 81 setting the required 18 23 Emergency stop switch 17 S Setting the date 32 Factory settings 0 66 84 Setting the time 32 DHW heating 25 Setting up summer mode 45 Fault message Setting not possible 36 Setting up winter mode o 45 Fault message Time switch not possible 36 Setup report 2 ee ee o 84 Fault messages o 79 Standard equipment 254 lt lt eee ees 70 Faults ue ee a ye oe eA ag we has Gs es 78 Standard program 2 1 eee eee 39 Fitted modules 000 4 14 Switching point i cee ee de eee ee 41 Flow sensor o o e 80 Flue YastesSt o 77 Thermal dis
5. 8 1 Modifying the standard program by inserting deleting switching points 8 1 1 Inserting switching points gt ae 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 ED 69220 until 23 00 h Insert two new switching points if for example you do not want to el O heat on Fridays from 10 00 to 13 00 h E e Your modified program will be saved under the program name Own and the ps number of the heating circuit ED A 1 2 05 30 23 00 B 1 2 05 30 10 00 13 00 23 00 7 747 012 053 14 1RS Fig 15 Inserting switching points to interrupt a heating phase A Family program B New program Own program 2 1 Day mode 2 Night mode Buderus 54 Logamatic 4121 4122 and 4126 Subject to technical modifications Family program Monday at 05 30 21 A Y Q New switch point at e E Q New switch point Friday at YL Q New switch point Friday at 10 00 O Additional programming options EN e Selecta 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 sel
6. Fax 01 6305706 01 6305715 www cfquadrant ie E mail sales 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
7. Observe the relevant national requirements regarding limiting the flue gas losses of your heating system e Arrange an annual flue gas test e The flue gas test is started at the boiler see technical boiler documentation During the flue gas test the MEC2 will show the display on the left Flue g test act Boiler temp 75 C Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 77 RA Troubleshooting 11 Troubleshooting Have your heating contractor remedy any faults immediately All system faults are displayed on the MEC2 programming unit Report the fault by telephone to your heating contractor Where necessary set the module switches according to the instructions in gt Chapter 12 Provided your control unit is equipped with the above modules the following faults may be reported Boiler Outside temperature sensor Heating circuitx Flow sensor DHW DHW sensor DHW stays cold DHW Therm disinfect DHW EMS DHW DHW warning Heating circuitx Remote control Heating circuit x Communication Heating circuit X in manual mode Status y burner Heating circuit x Boiler x Heating circuit x Fault mess pump BUS system ECO BUS has no reception BUS system No master BUS system Address conflict Address Conflict slot 1 Address Conflict slot 2 Address Conflict slot A Address Incorrect module slot 1
8. You may operate DHW heating either according to the factory settings Program select by heat circs or according to your own switching program Program select own DHW USER INFORMATION With the factory setting Program select by heat circs DHW heating begins 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 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 h until 09 00 h e Select a heating circuit gt Chapter 7 6 here DHW e Selecta program for the heating circuit DHW gt Chapter 7 10 here Program select new The display shows the blank screen New switch point for the new switching point e Enter the switching points gt Chapter 8 2 USER INFORMATION Only after all three details day time temperature have been defined for the new switching point will it be automatically saved under Own program DHW and the heating circuit selection DHW This saving is not shown on the display The display shows the 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 progra
9. Cylinder primary pump operational Display A DHW circulation pump operational 70 Logamatic 4121 4122 and 4126 Subject to technical modifications Heating circuit and DHW function Switch heating circuit and DHW for heating circ 1 y aur for heating circ 2 AUT 0 USER INFORMATION 1 In standard mode set the switch to AUT The positions 0 and manual Y are special settings reserved for heating contractors only Y The heating circuit pump is switched on The mixer is switched to zero volt and can be manually operated AUT The central heating or DHW circuit operates in automatic mode O The heating circuit pump and possibly the cylinder primary pump as well as the DHW circulation pump are stopped The mixer is switched to zero volt The control functions continue to operate Y Z The heating circuit and cylinder primary pumps start when 4000 cylinder has been selected in the DHW menu gt service instructions LEDs indicate the current function status Modules and their functions EM Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 71 Ea Modules and their functions 9 2 FM441 function module accessory The FM441 module regulates one heating circuit and one DHW heating facility The switches on the module only have service and maintenance functions and only affect 230 V outputs Only fit this module in the control unit once If the switches are
10. contractor 80 Logamatic 4121 4122 and 4126 Subject to technical modifications Operation in the event of a fault 12 12 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 switch or isolate the heating system from the mains supply by removing the main fuse Arrange for your local heating contractor to rectify any heating system faults immediately SYSTEM DAMAGE If an underfloor heating system is ON installed Before operating your heating system manually check the temperature settings of the temperature limiter on the boiler If the temperature is set incorrectly the underfloor heating system could overheat Switches are provided for manual mode on the control unit and the modules In position Y the relevant pump is started The mixers remain volt free and can be manually adjusted 12 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 local heating contractor Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 81 eal Operation in the event of a fault 12 2 Manual mode Logamatic 4121 Before making any adjustments for manual mode check the indiv
11. 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 temperature for example from 21 C to 20 C you can save approximately six percent of your heating bill e Also heat in an energy conscious manner in spring and autumn and utilise the summer winter time changeover gt Chapter 7 e A pleasant room climate 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 e 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 to run the DHW circulation pump for only three minutes every half hour e Arrange for your local heating contractor to service your heating system annually Buderus 10 Logamatic 4121 4122 and 4126 Subject to technical modifications 4 Safety 4 1 About these instructions These operating instructions contain important information for the safe and correct operation of the Logamatic 4121 4122 and 4126 control units 4 2 C
12. heating circuit here 2 Monday at 06 30 21 WD Continue to turn 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 Example 23 00 OO Release Time The newly adjusted time for the OFF switching point is saved Buderus 42 Logamatic 4121 4122 and 4126 Subject to technical modifications Extended functions Next switching point Continue to turn the rotary selector until the next switching point is displayed The next switching point Tuesday 05 30 h appears Also change the following switching points to 06 30 and 23 00 h The system will now heat from 06 30 h to 23 00 h Monday to Thursday Press Back to return to the permanent display USER INFORMATION You can change the weekday if you press Weekday instead of Time Elo O 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 Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 43 Extended func
13. local heating contractor Low loss header flow sensor fault Possible over or under flow Notify your local heating contractor Heating circuit x communication fault No communication between one BFU and the control unit Remote control may be faulty Notify your local heating contractor Boiler 1 status y burner fault It goes cold Try and remedy the boiler fault gt see technical boiler documentation DHW sensor fault DHW heating via Logamatic 4000 If the DHW sensor is faulty water will not be heated for safety reasons Notify your local heating contractor DHW sensor HE fault Sensor ON fault sensor OFF fault in case of DHW heating via FM445 Heating circuit x in manual mode If the DHW sensor is faulty water will not be heated for safety reasons Depending on switch positions pumps servomotors actuators etc will be operated manually Notify your local heating contractor The switches were set to manual for maintenance purposes or to remedy a fault Return the switches to AUT after the fault has been removed Boiler x in manual mode No automatic function such as heating program This is not a fault Turn the rotary selectors on the BC10 base controller to AUT if manual mode is no longer required Boiler x No connection fault Tab 4 Troubleshooting Buderus It goes cold Switch the boiler to manual Notify your local heating
14. night mode You can recognise the currently enabled heating mode because the green LED illuminates 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 Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 23 ea Standard functions Q Set room 16 C Constant night 6 4 2 For the operating mode not currently enabled You may also adjust the room temperature for an operating mode that is not currently enabled 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 Release Night mode The night setback temperature is now adjusted to 16 C The selected permanent display will then appear again Press AUT The AUT LED illuminates automatic mode is re enabled EU USER INFORMATION If you are currently in automatic night mode and you wish to adjust the day mode proceed as described above but instead hold down Day mode Buderus 24 Logamatic 4121 4122 and 4126 Subject t
15. o 50 7 18 Setting the party function 62 554 adria ew o rca a ed Gd EH 51 7 19 Setting the pause function o o o ooo oo ee 51 7 20 Room temperature matching lt lt lt ooo ooo o 52 7 21 Automatic maintenance Message o ooooocoooom oa 53 8 Additional programming options 22 05 54 8 1 Modifying the standard program by inserting deleting switching points 54 8 2 Creating a new heating program 2 0 ee 63 8 3 Creating anew DAW program ces carr da a enous 66 8 4 Creating a new DHW circulation pump program o o o oo ooo o 67 8 5 Thermal disinfection a4 De a A ot ee ee a a eee Ae 68 9 Modules and their functions 0 002 c eee eee ee 69 9 1 ZM424 central module 2 4 2de haw dex teehee eee eve cee de eames e cs 70 9 2 FM441 function module accessory ooo o es 72 9 3 FM442 function module accessory o ooo 74 9 4 FM445 function module Logamatic 4126 o oo ooooo oo 75 10 Boiler flue gas test o oo oocoococoor 77 11 TroubleshOotung socorro aria FRG Ge Had oes He See te ees 78 11 1 Simple troubleshooting terrassa aa rad 79 11 2 Troubleshooting ds d esas aio aa is A e A 80 12 Operation in the event ofafault o o oooooo 81 12 1 Emergency mode unas ra a Gee aaa a ed ee Bs 81 12 2 Manual mode Logamatic 41
16. room temperature and possibly the DHW temperature or automatic heating mode directly via the corresponding keys gt Fig 6 1 to 3 and 6 Behind a flap gt Fig 6 7 further keys are available for additional settings e g for the entry of weekdays or setting the current time The unit automatically returns to the standard display if no entry is detected for some time Controls and MEC2 programming unit 157 A 7 do oF Lo no E AUT O JUG lo 2206 i o AN di Fig 6 MEC2 programming unit NO 0d fF WN 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 Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 15 Controls and MEC2 programming unit 8 AH HKD SAI E 17 16 7 747 012 074 01 1RS Fig 7 MEC2 programming unit 1 Display 9 Radio clock signal only within Germany 2 Rotary selector 10 Display for set room temperature 3 Constant heating 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 1
17. 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 this kind of control you always need to keep all thermostatic radiator valves in the reference room fully open Buderus Weather compensated control with room temperature hook up Weather compensated control with room temperature hook up combines the advantages of the other two control modes The required flow temperature which 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 will also need to keep all thermostatic radiator valves in the reference room fully open Why do the thermostatic valves have to stay fully open If for example you want to reduce the room temperature in the reference room and you therefore close the thermostatic valve further the flow rate through the radiator is reduced and therefore less heat is transferred to the room This reduces the room temperature The control unit will endeavour to counteract the drop in room temperature by raising the flow
18. system will constantly operate in winter mode c Constant winter Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 45 Extended functions 7 14 Setting the DHW operating mode Heat circ sel DHW Actual room 19 5 C Outside temp 0 C Buderus 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 Heating circuit The permanent display will then appear again Select one of the following operating modes for DHW Const operation The water inside the DHW cylinder is constantly maintained at the set temperature 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 cylinder will heat the water to the set temperature and stop when the last heating circuit is switched off factory setting Alternatively you can enter your own DHW program gt Chapter 8 3 Press Automatic to select automatic mode After approximately three seconds the permanent display will appear again DHW circ OFF DHW heating is switched off By pressing DHW you will switch heating on for the duration of DHW heating once Press Night mode to sto
19. technical modifications 57 oy Additional programming options O Family program Monday at 22 00 h 17 C 6 8 Family program Delete Monday 22 00 TTT TT Own program 2 Monday at 17 00 21 C Buderus Turn the rotary selector to the switching point you want to delete here 22 00 h The switching point to be deleted is displayed Simultaneously press and hold Display and Holiday The bottom line shows eight blocks that are deleted in one second intervals from left to right The switching point has been deleted when no blocks are left The deleting process will be terminated if you release the keys prematurely 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 is 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 58 Logamatic 4121 4122 and 4126 Subject to technical modifications Additional programming options EN 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 for heating circuit 2 you want
20. temperature However raising the flow temperature does not raise the room temperature as the thermostatic valve continues to limit the room temperature An excessive flow temperature results in unnecessary heat losses from boiler and pipework At the same time the temperature in all rooms without thermostatic valves increases due to the higher boiler water temperature Logamatic 4121 4122 and 4126 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 for reducing the room temperature via the control unit Upon request your heating contractor 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
21. towards hotter or colder until the required room temperature is achieved Buderus 82 Logamatic 4121 4122 and 4126 Subject to technical modifications Operation in the event of a fault ae 12 3 Manual mode Logamatic 4126 Before making any adjustments for manual mode check O x the individual modules for any settings which may be incorrect If the control system indicates a fault you may temporarily run your heating system manually RISK OF SCALDING A from hot water WARNING The DHW temperature can be set to A a maximum of 80 C Settings higher than 60 C create a risk of scalding at the draw 7 2 off points e Ask your local heating contractor about the maximum set DHW temperature 1 and or check it yourself The DHW O a temperature is set via the thermostat of the wall mounted boiler SYSTEM DAMAGE MN through closed mixer circuits CAUTION To ensure operational reliability mixer circuits must not be fully closed Fig 26 Logamatic 4126 e Switch on the control unit via the ON OFF switch gt Fig 26 1 e Set primary circuit gt Fig 26 2 at selector switch e to manual Y e Set secondary circuit gt Fig 26 3 at selector switch mot to manual S e Set boiler water thermostat on the boiler to the required temperature e Switch on F
22. 001 Release Weekday to save your input Monday Press Weekday again to enter the month Press Weekday again to enter the year The item flashing can be modified with the rotary selector Setting the time Hold down Time and select the required time with the rotary selector i Q The time is set in one minute steps Set time Release Time to save your input 15 52 58 Na Buderus 32 Logamatic 4121 4122 and 4126 Subject to technical modifications 7 6 Selecting a heating circuit Extended functions 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 whose setting you want to change 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 Heating circuit and select the required heating circuit with Heat circ sel Release Heating circuit The displayed heating circuit is now selected As soon as the heating circuit has been selected the display returns to the permanent display Heating circ 2 aN L H M u C the rotary selector here Heating circ 2 Buderus
23. 21 ooo ee 82 12 3 Manual mode LogamalicAT2b lt vocicrreorricrarrrda a Ge bo 83 13 Setup report aia a ee al dada ar apor AR 84 14 Keyword index sicario e a ic 85 Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 3 Ea Introduction 1 Introduction 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 to be able to combine your economical and ecological aspirations Of course 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 heating contractor 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 Automatic summer winter time changeover Party pause function Holiday function DHW heating at the touch of a button Buderus Logamatic 4121 4122 and 4126
24. 22 and 4126 Subject to technical modifications 75 Ea Modules and their functions DHW function DHW switch 014 for primary circuit oO P AUT 0 for secondary circuit O S USER INFORMATION In standard mode set the switch to AUT RISK OF SCALDING A In manual mode you are at risk from WARNING scalding Always open the cold water tap and mix with hot water according to requirements The positions 0 and manual W are special settings reserved for heating contractors only Y The secondary primary pump is switched on The mixer is switched to zero volt and can be manually operated AUT The DHW primary system operates in automatic mode 0 The primary and secondary pumps and the DHW circulation pump are switched off The mixer is switched to zero volt The control functions continue to operate LEDs indicate the current functions Buderus 76 Logamatic 4121 4122 and 4126 Subject to technical modifications Boiler flue gas test 10 10 Boiler flue gas test f RISK OF SCALDING During the flue gas test the water can reach a temperature in excess of 60 C WARNING This creates a risk of scalding at the draw off points e Only draw off mixed hot and cold water during or just after a flue gas test Note that when mono lever mixer taps are in their usual position the water drawn may be too hot Never draw off hot water only when using twin lever mixer taps USER INFORMATION
25. 4 Summer winter time 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 16 Logamatic 4121 4122 and 4126 Subject to technical modifications 5 3 Switching on the control unit e Check that the control unit ON OFF switch and the switches on the fitted modules are set to I or AUT e Switch the control unit on by setting the ON OFF switch to I gt Fig 4 5 page 13 After approximately 2 minutes all modules fitted to the control unit are recognised and the standard display is shown 5 4 Switching off the control unit e Switch the control unit off by setting the ON OFF switch to 0 gt Fig 4 5 page 13 e When there is a risk Isolate the heating system from the mains supply with the emergency stop switch upstream of the boiler room or by removing the main fuse Controls and MEC2 programming unit 157 Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 17 ea Standard functions 6 Standard functions 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 6 1 Simple operation The standard functions are controlled by pressing one of the keys on the Standar
26. Fact tti Sa 06 30 23 30 Factory setting Su 07 00 22 00 Mo Th 04 30 22 00 E n A S Fr 04 30 23 00 Early shift Sa 06 30 23 30 ay SA Su 07 00 22 00 Late 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 Sa 06 30 23 30 in the 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 ah Sa 06 00 23 00 pate aS 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 heating Own 1 contractor or 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 40 Logamatic 4121 4122 and 4126 Subject to technical modifications Extended functions 7 12 Modifying the standard program by moving switching points If the switching points i e the times of a standard program at w
27. Operating Instructions Control unit Logamatic 4121 4122 and For users 41 26 Read carefully before use 7 747 016 733 03 2008 GB IE Buderus m Contents 1 Introduction a aaa rs eno ie 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 abo oon Bo A no In 11 4 1 About these instructions o22 sc24cc5 endangedgead shed he deen as 11 4 2 COWSCIUSS suas oe eee he bated ede seas eters Bo eee ee eas 11 4 3 Standards and guidelines directives 0 0 ce ee 11 NS o os 2 tee wee oe ae Ce ed Yee eed eee a ee ee ee oe ee 11 4 5 Please observe these notes lt o o ooooooooo es 11 4 6 Cleaning the control unit o o o 00 002 o em 12 4 7 Disposal cessa ara a a a a a RTS Hee eRe eS 12 5 Controls and MEC2 programming unit 13 51 COnMalUMMCONNONS s acaso aa das erre duce ohh whe A 13 5 2 MEC2 programming unit ss ss oe dee Ge ede de ra bea ees 15 5 3 Switching on ihe control Unit 222 ons aaa eee OR eee eee 17 54 Switching off the control unit 4 2242 4 40 e0 bade oteavks eee sees ea des 17 6 Standard functions 2 42 20 44544 obs cow peras 29S Sh oR Se SS 18 6 1 Simple Opera s lt exar Roe ee bs Oe wes aras woes HR 18 6 2 Permanent display 6 4 24424 65445 conosco hee ee eee we ee 19 6 3 Selecting the operating mode o o
28. P and the heating circuit number DHW circulat This saving is not shown on the display The display shows the 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 program CP You can call up your new Own program CP by pressing Prog and turning the rotary selector Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 67 En Additional programming options 8 5 Thermal disinfection RISK OF SCALDING A from hot water in the DHW circuit of the heating system if it is not equipped WARNING with a thermostatic mixer e During and shortly after thermal disinfection do not open any hot water tap without mixing in some cold water as well If Therm disinfect has been selected for your heating system the DHW is brought to a temperature once or several times a week that is high enough for example to kill off legionella bacteria The cylinder primary pump and DHW circulation pump if installed run constantly during thermal disinfection Thermal disinfection is started according to the times set at the factory If required your heating contractor can alter these settings Thermal disinfection is indicated by the LED display 1 on the FM441 and FM445 modules Buderus 68 Logamatic 4121 4122 and 4126 Subject to technical modifications Modules and their funct
29. 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 times The Family program is preset at the factory e Open flap e Select a heating circuit gt Chapter 7 6 a Hold down PROG Initially the heating circuit is displayed for which you want C to select a standard program Approximately 2 seconds later the designation of the currently selected standard program will appear Select the required standard program with the rotary selector here Seniors Release PROG The displayed program is now selected Time switch Program select Seniors J The display shows the program designation and the first switching point Senior program for the selected heating program here Senior program Monday at 05 30 21 C O Press Back to return to the permanent display USER INFORMATION a Switching programs are only effective in automatic mode gt Chapter 6 3 1 Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 39 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
30. 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 Advanced heating systems offer many functions for saving energy without sacrificing comfort 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 DHW cylinder or an instantaneous water heater heats the water required for a shower bath or washing your hands 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 The important thing is that the various components match each other The burner combusts fuel e g gas or oil and heats the water inside the boiler Using pumps this hot water is transported through the pipework to the consumers radiators underfloor heating system etc Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 5 2 What you should know about your heating system Fig 1 sho
31. and hold down Temperature First the heating circuit whose KN 0 temperature you want to adjust is displayed After approximately 2 seconds the display will show the currently selected temperature and operating mode Adjust the temperature for the heating circuit with the rotary selector here 21 C Release the key to save your input Set room The day room temperature is now adjusted to 21 C The selected permanent aie display will then appear again Automatic day USER INFORMATION 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 by pressing Night mode After modifying the temperature reset the operating mode to the previous setting USER INFORMATION For heating circuits with individual remote control units e g BFU you can adjust the room temperature only via these units gt see remote control instructions Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 35 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 heating contractor will determine which heating circuits are to be controlled by the MEC2 programming unit These heating circuits will be designated MEC heat circ MEC h
32. ange 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 switch or isolate the heating system from the mains supply by removing the main fuse e Arrange for your local heating contractor to rectify any heating system faults immediately RISK OF INJURY SYSTEM DAMAGE caution _ from operator error Operator errors can result in injury and or damage to property e Ensure that children never operate the appliance unsupervised or play with it Ensure that only personnel able to operate the appliance correctly have access to it Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 11 ca Safety RISK OF SCALDING WARNING CAUTION For thermal disinfection the entire DHW system is set at the factory to heat up to 70 C start Tuesday night at 01 00 h If required e g shift work your local heating contractor can alter the start time During this time never open any hot water tap without mixing in cold water if the DHW circuit of your heating system is not equipped with a therm
33. atic summer winter time changeover Select the required heating circuit before calling up the summer winter time 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 LS Hold down Su Wi The display briefly shows the heating circuit Then turn E 0 the rotary selector to the required changeover temperature below which you want to heat here 18 C Summer Winter Release Su Wi to save your input Summer from The display shows the set changeover temperature i Setting up constant summer mode e Select a heating circuit gt Chapter 7 6 Example Heating circ 2 OEN Hold down Su Wi The display briefly shows the heating circuit ED 0 Then turn the rotary selector to a changeover temperature below 10 C The display shows Constant summer Summer Winter Release Su Wi to save your input Your heating system will constantly operate in summer mode Constant summer 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 5 Q The display shows Constant winter Summer Winter Release Su Wi to save your input Your heating
34. bject to technical modifications 69 NN Modules and their functions 9 1 ZM424 central module The ZM424 module together with the FM455 module are part of the standard equipment of the Logamatic 4121 control unit The ZM424 module must always be installed in the I h slot 1 The FM455 module must always be installed below the ZM424 in slot A The switches on the module only have service and maintenance functions and only affect the 230 V outputs If the switches are not set to automatic a message to this effect appears on the MEC2 programming unit and fault indicator lights up USER INFORMATION Never use the switches to shut down the heating system during temporary absence Use the holiday function for this purpose gt chapter Chapter 7 16 The control functions remain operational in manual mode Buderus 0 J E i Ar y Aut Au a J gt s Le S Fig 20 ZM424 1 Boiler heating circuit 1 DHW 2 Heating circ 2 3 Switch Display General fault e g on site faults sensor faults external faults wiring faults internal module faults manual mode The fault messages appear as plain text on the MEC2 programming unit LEDs for the following functions Display Burner operational Display A Mixer opens hotter Display y Mixer closes colder Display Heating circuit 2 in summer mode Display Heating circuit pump operational Display
35. circuits 1 and 2 D USER INFORMATION In standard mode the switches should be set to AUT The positions 0 and Y manual mode are special settings reserved for heating contractors 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 remain active Current functions are indicated by LEDs The switches on the modules only have service and maintenance functions and affect only the 230 V outputs If the switches are not set to automatic a message to this effect appears on the MEC2 programming unit and fault indicator illuminates Buderus Fig 23 FM442 1 Heating circuit x 2 Heating circuit y Display General fault e g on site faults sensor faults external faults wiring faults internal module faults manual mode Fault messages appear as plain text on the MEC2 programming unit LEDs for the following functions Display A Mixer opens hotter Display vy Mixer closes colder Display Heating circuit in summer mode Display Heating circuit pump operational 74 Logamatic 4121 4122 and 4126 Subject to technical modifications 9 4 FM445 function module Logamatic 4126 The FM445 module controls DHW heating via a primary system Plug it into the r h s
36. d 4126 Subject to technical modifications Extended functions 7 21 Automatic maintenance message Note maint message O maint after Date required pennaa maint after Hours run required If your heating contractor has with your agreement enabled the Automatic maintenance message the maintenance message Note maint message is displayed at the predetermined time e Open flap Turn the rotary selector You will see either maint after Date or maint after Hours run e Notify your local heating contractor to schedule the inspection and maintenance work The Logamatic telecontrol system enables the maintenance message to be transmitted automatically to your mobile PC or fax machine USER INFORMATION The automatic maintenance message remains active until it is reset by your heating contractor Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 53 En Additional programming options 8 Additional programming options This chapter is intended to provide more detailed information to those of our customers who would like to familiarise themselves further with the functions of their heating system The following pages will 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
37. d functions keypad or by turning the rotary selector o O o o a cy ai o gt E O 192206 G A op e 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 Condition For this the programming unit flap must be closed The display shows the set value Set room 21 C Constant day Buderus 18 Logamatic 4121 4122 and 4126 Subject to technical modifications Standard functions 105 USER INFORMATION If your heating system is equipped with several heating circuits first select the correct heating circuit gt Chapter 7 6 Only then can you select the operating mode and room temperature 6 2 Permanent display J Common flow 45 C Outside temp 21 C Actual room 19 5 C Outside temp 0 C USER INFORMATION The following MEC2 displays only describe the possible displays of the ZM424 module standard equipment Logamatic 4121 of the FM456 and FM457 modules cascade modules accessories and of the most frequently used FM441 and FM442 modules accessories Subject to the way your heating contractor has configured your system one or more MEC2 displa
38. d 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 To enter the next switching point e g Friday 13 00 21 C first repeat the New switch point procedure detailed above at om aD Press Back to return to the permanent display Buderus 56 Logamatic 4121 4122 and 4126 Subject to technical modifications 8 1 2 Deleting switching points Example Additional programming options EN In the Family program for heating circuit 2 the switching point Monday 22 00 is to be deleted Your modified program will be saved under the program name Own and the number of the heating circuit 22 00 A 1 2 nn 05 30 B 1 2 A 05 30 7 747 012 053 13 1RS Fig 16 Deleting a switching point A B 1 Family program Monday at 05 30 21 C Family program New program Own program 2 Day mode Night mode Select a heating circuit gt Chapter 7 6 Example Heating circ 2 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 Buderus Logamatic 4121 4122 and 4126 Subject to
39. e 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 preset room temperature Hold down Day mode and simultaneously open the flap of the MEC2 Party function is enabled Hold down Day mode 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 Day mode The party function starts immediately After the set time has expired the heating system returns to automatic heating mode If you want to cancel the party function call up party function as described above and turn the rotary selector to O 7 19 Setting the pause function O Pause function 3 hours 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 enabled 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 togeth
40. eat circ The following adjustments made at the MEC2 apply all to MEC heat circ simultaneously Setting the room temperature Setting the summer winter time 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 36 Logamatic 4121 4122 and 4126 Subject to technical modifications 7 9 Selecting and modifying a heating program 7 9 1 What is a heating program A heating program provides automatic changeover between operating modes day and night mode at fi
41. ect family Release Prog to enable the selected standard program here Family program The display shows the selected standard program Turn the rotary selector once anti clockwise until New switch point is displayed The display shows the blank screen 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 Weekday to save 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 Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 55 ea Additional programming options The display shows the set value New switch point Release Temp to save your input Friday at 10 00 17 C USER INFORMATION You cannot freely enter any temperature here Only the factory set day and night temperatures are available which you can however modify yourself gt Chapter 6 4 USER INFORMATION Only after all three details day time temperature have been defined for the new switching point will it be automatically save
42. ed for heating contractors only Y The heating circuit pump or primary pump is switched on Fig 22 FM441 The mixer is switched to zero volt and can 1 Heating circuit switch be manually operated 2 DHW switch The DHW circulation pump is switched off AUT The heating circuit or DHW circuit operates in automatic mode 0 The heating circuit pump or cylinder primary pump as well as the DHW circulation pump are switched off The mixer is switched to zero volt The control functions remain active Current functions are indicated by LEDs Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 73 Ea Modules and their functions 9 3 FM442 function module accessory The FM442 module regulates two independent heating circuits with mixer Several of these modules can be used in one control unit The switches on the module only have service and maintenance functions and only affect 230 V outputs If the switches are not set to automatic a corresponding message appears on the MEC2 programming unit and the fault indicator 4 illuminates USER INFORMATION Never use the switches to shut down the heating system during temporary absence Use the holiday function for this purpose gt operating instructions for Logamatic 412x control unit The control functions remain operational in manual mode Heating circuit function Heating circuit switch aut o gt Y e g for heating
43. er with the set number of hours Release Night mode The pause function starts immediately After the set time has expired the heating system returns to automatic heating mode If you want to cancel the pause function call up pause function as described above and turn the rotary selector to 0 Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 51 Extended functions 7 20 Room temperature matching USER INFORMATION 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 E Calibration MEC Room temperature Correction o t Calibration MEC Room temperature Correction 0 5 C gt Buderus The factory setting is 0 C The possible correction range is between 5 C and 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 Temp to save your input Press Back to return to the permanent display The display shows the corrected temperature 22 5 C 52 Logamatic 4121 4122 an
44. erfloor heating system 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 mixing valve into the hot flow water to achieve the required lower temperature It is important to note that heating circuits with three way mixing valves require an additional pump This pump enables the second heating circuit to be operated independently of the first heating circuit Buderus Logamatic 4121 4122 and 4126 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 in the control unit 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 approximately 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 minimum clearance 50 cm Otherwise the
45. factory setting Alternatively you can enter your own DHW circulation pump program gt Chapter 8 4 Press Automatic 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 heating DHW once Press Night mode to switch off DHW circulation After approximately three seconds the permanent display will appear again Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 47 Extended functions 7 16 Setting the holiday function Using the holiday function you can heat at a lower room temperature if you are away for a prolonged period Example If you are on holiday for the next five days and you want to heat less during that time operate heating circuit 2 with a reduced room temperature of 12 C for example USER NOTE As the holiday function is enabled 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 The display shows 5 Release Holiday t
46. from 23 30 h 17 C A 1 21 C 17 C 05 00 21 00 B 4 21 C 20 17 C 09 30 23 30 7 747 012 053 10 1RS Fig 19 New heating program 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 screen New switch point Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 63 oy Additional programming options Q New switch point Monday Friday at 1 1 1 1 Y Q New switch point Monday Friday at 05 00 __ DV y Q New switch point Monday Friday at 05 00 21 C A Buderus y Enter the first switching point Monday Friday 05 00 h 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 day 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
47. hase here 17 00 If you have selected the start point of the next consecutive heating phase the bottom line will show eight blocks which are deleted in one second intervals from left to right When no blocks are left both heating phases have been combined The deleting process will be terminated if you release the Time key prematurely or turn the rotary selector back In this 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 is saved under Own program and the 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 62 Logamatic 4121 4122 and 4126 Subject to technical modifications Additional programming options ey 8 2 Creating a new heating program 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 relevant heating circuit number Example Monday Friday from 05 00 h 21 C from 21 00 h 17 C Saturday Sunday from 09 30 h 21 C
48. hich the system changes over between day and night mode only partially suit you you may change them or ask your local heating contractor to change them for you The modified standard program is saved under Own and the number of the heating circuit The heating program memory is available for this The following example shows how the switching points of the standard program Family can be changed for the days Monday to Thursday A 1 2 2 05 30 22 00 B 1 2 05 30 06 30 22 00 23 00 7 747 012 053 15 1RS Fig 13 Changing the switching points from 05 30 to 06 30 h and from 22 00 to 23 00 h 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 Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 41 Hold down PROG and select the required standard program with the rotary O selector Release PROG Time switch Program select Family The first switching point Monday 05 30 appears Family program Monday at 05 30 21 C Hold down Time and select the required time with the rotary selector Example 06 30 9 O Release Time The newly adjusted time for the ON switching point is now saved The modified switching point will be saved under the Own program and Own program 2 the number of the
49. idual modules for any settings which may be incorrect If the control system indicates a fault you may temporarily run your heating system manually RISK OF SCALDING A The DHW temperature can be set to WARNING 2 maximum of 80 C Settings higher than 60 C create a risk of scalding at the draw 3 off points e Ask your local heating contractor about the maximum set DHW temperature q and or check it yourself The DHW temperature is set via the thermostat of the wall mounted boiler O SYSTEM DAMAGE Fig 25 Logamatic 4121 MN through closed mixer circuits CAUTION To ensure operational reliability mixer circuits must not be fully closed Switch on the control unit via the ON OFF switch gt Fig 25 1 e Set heating circuit 1 poss DHW gt Fig 25 3 at selector switch ON to manual W or a e Set heating circuit gt Fig 25 2 at selector switch e to manual Y Set boiler water thermostat on the boiler to the required temperature e Switch on Flue gas test switch 4 on the wall mounted boiler In case of faults immediately notify your local heating contractor who will provide a professional service Notify your contractor of the faults displayed on the MEC or the fault code on the boiler Manually disconnect the heating circuit mixer and position
50. if the heating system is subject to a risk of frost Heating with reduced room temperature night mode only differs from standard heating mode day mode through a lower flow temperature When changing from total shutdown to reduced heating total shutdown is activated subject to room temperature when the actual room temperature exceeds the set room temperature This function is only possible if a room temperature is being captured When changing from total shutdown to reduced heating total shutdown is 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 mixing valve between the heat source and the und
51. infection 68 FM441 function module 72 Thermometer o 52 FM442 function module 74 Thermostatic radiator valves 6 FM445 1 ee 75 Thermostatic valve 0 6 H Time switch o 31 37 Heating circuit 33 34 72 Troubleshooting lt 2 sy da ek ee a 80 Heating circuit function 71 73 U Heating circuits assignment 84 Underfloor heating system 81 Heating control unit 5 Z Healing phase ui e Se 59 PWIA En ce oo Ge ad eee a eae ee 70 Heating progam 28 37 39 Holiday function 48 50 Holiday progam 204 48 l Instantaneous water heater 5 K Keypad sis o a e a e E e ae a 15 L LEDS veh ee a dc o do i 72 74 M Manual mode 20 22 80 N Nightmode 20005 9 20 Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 85 Buderus 86 Logamatic 4121 4122 and 4126 Subject to technical modifications Logamatic 4121 4122 and 4126 Subject to technical modifications Buderus 87 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
52. ions 13 Controls and MEC2 programming unit 5 6 7 O 7 747 012 002 02 1RS Fig 5 Fitted modules example Logamatic 4121 Slot 1 for ZM424 module comprising 5 Slot 2 for an additional module 2 Heating circ 1 mixed 6 MEC2 alternative Heating circ 1 unmixed DHW and DHW circulation 7 CM431 3 Heating circ 2 mixed Slot A for FM455 module KSE1 USER INFORMATION a For the Logamatic 4126 control unit the FM445 module is installed in slot 1 DHW via primary system gt Chapter 9 4 Buderus 14 Logamatic 4121 4122 and 4126 Subject to technical modifications 5 2 MEC2 programming unit The MEC2 programming unit is the central element with which you operate your Logamatic 412x 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 scroll through the menus Keys You control the functions via the keys and the relevant indications appear on the display If you push a key and hold it down you can change a value using the rotary selector The new value will be accepted and saved after you release the key You can reach certain functions such as day room temperature night
53. ions EN 9 Modules and their functions The following lists all the modules that are or can be fitted in Logamatic 412x control units Logamatic 4121 4122 4126 MEC2 programming unit O O ZM435 boiler display x xX CM431 controller module O O O ZM424 central module O e 2 heating circuits 1 DHW circuit FM441 function module S X _ 1 heating circuit 1 DHW circuit Module FM442 function module X x X 2 heating circuits FM443 function module X x X Solar circuit FM444 function module Xx xX X Alternative heat source FM445 function module X x O LAP LSP primary system FM446 function module EIB interface x x AN FM448 function module Xx Xx Xx Central fault message FM455 function module O E _ KSE 1 only with ZM424 FM456 function module Xx x x KSE 2 cascade 2 boilers FM457 function module x x x KSE 4 cascade 4 boilers FM458 function module _ _ Strategy module Tab 2 Modules and their functions O Standard equipment level The following pages contain information regarding e Subject to version either an MEC2 the most important modules you can use programming unit or a AM435 boiler display Particularly the modules FM443 FM444 FM446 may ba tilted as Sangard oc Uipmont FM448 FM456 FM457 and FM458 are described X Accessories separately in the technical module documentation Combination installation not possible Buderus Logamatic 4121 4122 and 4126 Su
54. is in constant day mode standard mode Press Night mode The Night mode LED illuminates Your heating system is now in constant night mode setback mode and operates at a lower room temperature USER INFORMATION If you have selected manual mode other automatic controls will also be switched off e g the summer winter time changeover gt Chapter 7 13 Buderus 22 Logamatic 4121 4122 and 4126 Subject to technical modifications Standard functions 6 6 4 Setting the room temperature o90o O OU OJO LO EZ l a A With the flap closed you can adjust the room temperature with the rotary selector With the flap open also press Day mode or Night mode With the rotary selector you can 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 assigned to the MEC2 programming unit gt Chapter 7 7 cs Q Set room 23 C Automatic day USER INFORMATION The set room temperature applies to the currently enabled heating mode i e day or
55. ject to technical modifications 7 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 radiant energy from the sun 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 A further possible heating control method is room temperature dependent control The control unit calculates the flow temperature based on the set and 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
56. lot slot 2 of the control unit this ensures the power supply to all other modules Only use this module if no other FM441 has already been installed in the control unit The switches on the module are for service and maintenance purposes and only affect the 230 V outputs If the switches are not set to automatic a message to this effect appears on the MEC2 programming unit and fault indicator illuminates USER INFORMATION a Never use the switches to shut down the heating system during temporary absence Use the holiday function for this purpose gt chapter Chapter 7 16 The control functions remain operational in manual mode Modules and their functions EN by Sor v Ao a oz Fo Aut o o Fig 24 FM445 Display General fault e g on site faults sensor faults external faults wiring faults internal module faults manual mode The fault messages appear as plain text on the MEC2 programming unit LEDs for the following functions Display E DHW is remains below the set temperature in setback night mode Display A Mixer opens hotter Display y Mixer closes colder Display P Cylinder primary pump operational Display S Cylinder secondary pump operational Display Z DHW circulation pump operational Display 1 Thermal disinfection Display Anti scaling protection enabled secondary pump cycles Buderus Logamatic 4121 41
57. lue gas test switch 4 on the wall mounted boiler Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 83 13 Setup report 13 Setup report Operating values Input range Factory settings Setting Program selection Family Early morning Late evening Morning Afternoon Noon Single Seniors New Family DHW 30 C 60 C 60 C Summer winter time changeover 10 C 30 C Constant summer Constant winter 17 C Day room temperature 11 C 30 C 21 C Night room temperature 2 C 29 C 17 C Holiday room temperature Thermal disinfection 10 C 30 C Yes No 17 GE No Assignment of heating circuits As part of the commissioning process your heating contractor will assign the individual heating circuits of your heating system e g heating circuit 1 I h side of ground floor Heating circ Assignment Heating circ 0 Heating circ 1 Heating circ Heating circ Heating circ Heating circ Heating circ Heating circ CoO N O Oo A WwW PX Heating circ Buderus 84 Logamatic 4121 4122 and 4126 Subject to technical modifications 14 Keyword index Keyword index 14 A O Adjusted outside temperature 44 Operating mode Automatic o o o e 53 Automatic o e
58. m DHW by pressing Prog and turning the rotary selector gt Chapter 7 6 66 Logamatic 4121 4122 and 4126 Subject to technical modifications Additional programming options EN 8 4 Creating a new DHW circulation pump program You can operate the DHW circulation pump either according to the factory settings Program select by heat circs or according to your own new switching program Program select own CP USER INFORMATION With the factory setting Program select by heat circs the DHW circulation pump will automatically start 30 minutes before the first switching point of all heating circuits associated with this control unit and end when the last heating circuit is stopped New switch point If your circulation pump should 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 h e Select a heating circuit gt Chapter 7 6 here DHW circulat e Select a program for the heating circuit DHW circulat gt Chapter 7 10 here Program select new The display shows the blank screen New switch point for the new switching point e Enter the switching points gt Chapter 8 2 USER INFORMATION Only after all three details day time temperature have been defined for the new switching point will it be automatically saved under Own program C
59. mperature is too low Correct the set room Room cool temperature DHW supply runs for too long Check DHW heating Heat sources deliver insufficient heating Check heat sources energy or are shut down Room temperature sensor is incorrectly Sensor adjustment adjusted DHW is set to the wrong temperature Correct the DHW temperature setting DHW cool Switching program is incorrectly set up Re program the switching program Tab 3 Simple troubleshooting Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 79 eae Troubleshooting 11 2 Troubleshooting Fault Effect Remedy DHW stays cold in case of DHW heating via Logamatic 4000 DHW is too cold Set DHW switch on module ZM424 FM441 or FM445 to manual mode Notify your local heating contractor DHW stays cold in case of DHW heating via Logamatic EMS DHW is too cold Notify your local heating contractor Remote control fault External sensor fault Flow 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 heat supply Notify your local heating contractor Notify your local heating contractor Tell your heating contractor which temperature sensor is faulty Flow sensor fault It may get too hot Manually adjust the mixer Notify your
60. n Set room 21 C Constant day Set room 17 C Constant night Buderus 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 50 Logamatic 4121 4122 and 4126 Subject to technical modifications Extended functions 7 18 Setting the party function Q Party function 4 hours Le 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 th
61. not set to automatic a corresponding message appears on the MEC2 programming unit and the fault indicator illuminates USER INFORMATION Never use the switches to shut down the heating system during temporary absence Use the holiday function for this purpose gt operating instructions for Logamatic 412x control unit The control functions remain operational in manual mode Buderus Fig 21 FM441 Display General fault e g on site faults sensor faults external faults wiring faults internal module faults manual mode Fault messages appear as plain text on the MEC2 programming unit LEDs for the following functions Display A Mixer opens hotter Display vy Mixer closes colder Display Heating circuit in summer mode Display gh DHW in night mode below the set temperature Display y Heating circuit pump operational Display L Cylinder primary pump operational Display Z DHW circulation pump operational Display J Thermal disinfection enabled 72 Logamatic 4121 4122 and 4126 Subject to technical modifications Modules and their functions EN Heating circuit and DHW function Heating circuit switch gt Fig 22 1 and DHW gt Fig 22 2 for heating circ 1 eS for DHW supply AUT ry USER INFORMATION a In standard mode the switches should be set to AUT The positions 0 and y manual mode are special settings reserv
62. o save your input USER INFORMATION The Set room display only appears if the Hold room temp holiday setback type or Reduced has been set by your heating contractor Holiday days 5 Set room 17 C Buderus 48 Logamatic 4121 4122 and 4126 Subject to technical modifications Extended functions Hold Temp down and select the required temperature with the rotary selector here 12 C O Q The display shows 12 C Holiday days Release Temp to save your input Set room The holiday function is enabled immediately after entry 12 C 57 ON ed You can cancel the holiday function any time by calling it up as described above and setting the number of holiday days to 0 USER INFORMATION e 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 USER INFORMATION 5 A separate DHW holiday function can be entered if DHW is produced according to a separate time program Program selection own DHW gt Chapter 8 3 The DHW circulation pump is switched off automatically during the DHW holiday function Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 49 Extended functions 7 17 Interrupting and continuing the holiday functio
63. o technical modifications Standard functions 6 6 5 Heating DHW The programming unit also offers you the option of heating DHW in an energy a conscious manner For this purpose DHW heating can be selected via a time switch You can select between the set values for DHW and OFF to stop DHW heating To save energy DHW heating will be stopped outside the programmed times ED se i e DHW is not heated in night mode QO DHW heating is factory set to 60 C in automatic mode 60 C C Y 2 3 05 30 09 00 18 00 21 00 7 747 012 053 17 1RS Fig 9 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 see gt Fig 9 USER INFORMATION 1 The DHW temperature will have fallen below the set value if the green DHW LED illuminates Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 25 153 Standard functions 6 5 1 Setting the DHW temperature RISK OF SCALDING A from hot water WARNING The DHW cylinder temperature is preset to 60 C There is a risk of scalding from hot water if your heating contractor has set the DHW temperature higher or has enabled the Therm Disinfect function and the heating water circuit of your heating system is not equi
64. ons 27 Extended functions 7 Extended functions 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 the 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 y 8 Es Sly ea ae ee 9 i U 8 7 747 012 073 01 1RS Fig 10 Keys for the extended functions Enter the day of the week Enter holidays Select standard display Set the time Change temperature values Summer winter time changeover Return to the standard display Select a time switch program 00 JO A FP WOOD Select heating circuits DHW circuit Buderus 28 Logamatic 4121 4122 and 4126 Subject to technical modifications Extended functions 7 2 Controlling the extended functions 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 Time and simultaneously turn the rotary selec
65. ooo eme 20 6 4 Setting the room temperature o ooo 23 65 Heating DIRA Er Ca dene AAA AAA 25 7 Extended functions lt lt vcixoica a A a 28 7 1 Keys for extended functions lt ooo oo ooo 28 7 2 Controlling the extended functions 2 oo 29 7 3 Displaying Operating values assa ada e eS 29 7 4 Changing the permanent display o oo e 30 7 5 Setting the date and time a na bee se eee eee ra 31 7 6 Selecting a heating circuit averia aaa ey tae aaas 33 7 7 Adjusting the room temperature for another heating circuit 34 7 8 Heating circuits with MEC2 programming unit o o o o o ooo 36 7 9 Selecting and modifying a heating program o o ooo oooo 2 eee eee 37 7 10 Selecting a standard program o o o ooo ooo 39 7 11 Summary of standard programs 000 eee ee 40 7 12 Modifying the standard program by moving switching points 41 7 13 Setting the summer winter time changeover o o ooo oo 44 7 14 Setting the DHW operating mode o o ooo 46 7 15 Setting the operating mode for DHW circulation lt lt o 47 7 16 Setting the holiday function dos Gee e pies ad eee a ee Bae 48 Buderus 2 Logamatic 4121 4122 and 4126 Subject to technical modifications 7 17 Interrupting and continuing the holiday function o
66. orrect use The Logamatic 4121 4122 and 4126 control units are designed to control and monitor heating systems with different types of boiler in detached houses apartment buildings residential complexes and buildings with medium to large heat demand 4 3 Standards and guidelines directives The design and operation of this product conform to European Directives and the supplementary national requirements Its conformity is demonstrated by the CE designation You can view the Declaration 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 signified by the following terms RISK TO LIFE Identifies possible risks associated with a product that might lead to serious injury or WARNING i J death if appropriate care is not taken RISK OF INJURY SYSTEM DAMAGE CAUTION Indicates a potentially dangerous situation which could lead to minor or moderately serious injuries or to damage to property USER INFORMATION User tips for the optimum utilisation and adjustment of the appliance plus other useful information Safety EN 4 5 Please observe these notes e Only operate the control unit as intended and if it is in perfect working order e Let your local heating contractor instruct you thoroughly in the operation of this system Read these operating instructions carefully e Only enter or ch
67. ostatic mixer As there is a risk of scalding at temperatures above approximately 60 C ask your local heating contractor about the set DHW temperatures SYSTEM DAMAGE from frost When the heating system is switched off it can suffer damage from frost Protect your heating system against frost damage by draining it and the DHW pipework at the lowest possible point 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 local heating contractor Buderus 12 Logamatic 4121 4122 and 4126 Subject to technical modifications Controls and MEC2 programming unit 157 5 Controls and MEC2 programming unit 5 1 Control unit controls 7 747 012 002 01 1RS Fig 4 Controls example Logamatic 4122 1 Slot 1 4 Slot 2 2 ZM435 boiler display 5 ON OFF switch 3 Connection for external service equipment and MEC2 6 Fuse 10 A slow USER INFORMATION The Logamatic 4122 control unit is also available with the MEC2 programming unit USER INFORMATION The system flow temperature is displayed on the boiler display Buderus Logamatic 4121 4122 and 4126 Subject to technical modificat
68. own heating program for DHW heating This saves you energy Determine the time points so that DHW is only available when one heating circuit is in standard heating mode day mode In this case DHW is heated 30 minutes before day mode of the first heating circuit so it is available at the selected time A 1 2 A 06 30 23 00 B 1 2 06 00 22 00 c 1 y y lt 30 min 2 05 30 23 00 7 747 012 053 19 1RS Fig 12 DHW heating begins 30 minutes before day mode of the first heating circuit and ends with the beginning of night mode of the last heating circuit A Heating circ 1 B Heating circ 2 C DHW 1 Day mode 2 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 1 USER INFORMATION DHW will not be subject to a temperature setback if you operate one heating circuit in Manual day mode and DHW is being heated by heat circs USER INFORMATION DHW will not be heated if you are operating all heating circuits in the Manual night mode and DHW is heated by heat circs ed 6 Buderus 38 Logamatic 4121 4122 and 4126 Subject to technical modifications Extended functions 7 10 Selecting a standard program gt ie E The MEC2 programming unit is equipped with eight different preset heating programs that act as standard programs
69. p DHW heating After approximately three seconds the permanent display will appear again 46 Logamatic 4121 4122 and 4126 Subject to technical modifications Extended functions 7 15 Setting the operating mode for DHW circulation Heat circ sel DHW circulat Actual room 19 5 C Outside temp 0 C 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 heating contractor 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 circulat with the rotary selector Release Heating circuit The permanent display will then 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 independently 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 started the DHW circulation pump starts to run at the set interval and stops when the last heating circuit is switched off
70. pped with a thermostatically controlled mixer Please note that fittings can also 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 DHW and select the required DHW temperature with the rotary selector a Q Release DHW The newly selected DHW temperature is saved within DHW approximately 2 seconds The permanent display will then appear again set 60 C USER INFORMATION 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 legionella Buderus 26 Logamatic 4121 4122 and 4126 Subject to technical modifications Standard functions 6 6 5 2 Heating DHW once If the DHW LED illuminates only a limited amount of hot water remains in the cylinder Should you require a larger amount of DHW proceed as follows Press DHW The LED of the DHW key illuminates and heating DHW once begins Subject to the size of the DHW cylinder and the boiler output DHW will be DHW available after approximately 10 to 30 minutes With instantaneous water actual 55 C heaters DHW is available almost immediately Reheating USER INFORMATION 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 legionella Buderus Logamatic 4121 4122 and 4126 Subject to technical modificati
71. pter 7 12 Manual mode For example if you want to heat longer in the evening or not quite as early in the morning you can also select day and night mode manually gt Chapter 6 3 2 You can also use manual mode to heat on cooler days when the system operates in summer mode Logamatic 4121 4122 and 4126 Subject to technical modifications Standard functions 6 6 3 1 Selecting automatic mode In automatic mode your heating system will operate with the time switch program i e central and DHW heating at preset times Example Enabling automatic mode Press AUT The AUT LED illuminates automatic mode is enabled In addition either the Day mode or the Night mode LED will illuminate This is So subject to the set times for day and night mode 21 C Automatic day and night mode Automatic day At fixed times central heating is provided or the room temperature is set back 21 C 1 17 C 2 05 30 22 00 7 747 012 053 18 1RS Fig 8 Changeover from day and night mode at fixed times example 1 Day mode 2 Night mode Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 21 153 Standard functions Set room 21 C Constant day Set room 17 C Constant night f 6 3 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
72. rn line UV 1 41 k LIR Fig 2 Influences on the room climate Logamatic 4121 4122 and 4126 Subject to technical modifications What you should know about your heating system EN Why do you need a control unit The control unit ensures convenient heat and economical consumption of fuel and electrical energy It starts the heat source boiler and burner and pumps when warm rooms or DHW are required In doing so it utilises the components of your heating system at the correct time Furthermore your control unit records different variables that influence the room temperature and compensates for these What does the control unit calculate C Advanced control units calculate the temperature Pc 80 required within the boiler the so called flow temperature subject to the outside temperature l 70 The relationship between the outside temperature and the flow temperature is described as the heating curve 60 The lower the outside temperature the higher the flow temperature must be y 50 The control unit can operate in three control modes p Weather compensated control Room temperature dependent control a0 Weather compensated control with room 20 50 15 110 45 40 5 40 15 temperature hook up E Xx C 7 747 012 073 03 1RS Fig 3 Heating circuit curve example x Outdoor temperature y Flow temperature Buderus Logamatic 4121 4122 and 4126 Sub
73. rogramming unit The following permanent displays are available System flow if MEC2 is installed as a wall mounted unit Outdoor temperature DHW Time Date Only if a DHW function is installed Hold down Display and select the required permanent display with the rotary selector here Date Release Display The selected permanent display has now been saved 30 Logamatic 4121 4122 and 4126 Subject to technical modifications 7 5 Setting the date and time USER INFORMATION 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 control unit time switch if enabled Reception of the radio clock signal is indicated by symbol on the display USER INFORMATION We recommend leaving the radio clock receiver disabled outside Germany to prevent the reception of false signals incorrect time setting Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 31 Set 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 Set date the date using the rotary selector here 20 20 08 2
74. tions 7 13 Setting the summer winter time changeover In addition to the outside temperature your control unit considers the ability of the building to store heat and its thermal insulation creating from these the Adjusted outside temperature gt Fig 14 After a delay it automatically changes over between summer and winter mode C 26 24 a 22 20 18 Y 16 14 2 12 4 10 a A 6 0 3 6 o 2 8 8 A h A 7 747 012 073 04 1RS Fig 14 Current and adjusted outside temperatures compared x Outdoor temperature y Time 1 Current outside temperature 2 Adjusted outside temperature Summer mode Heating operation is switched off if the Adjusted outdoor temperature exceeds the factory set changeover threshold of 17 C Summer mode is indicated on the display with symbol 1 DHW heating remains operational Press Day mode if you want to heat at short notice in summer mode The heating system returns to automatic summer mode if you press AUT Buderus 44 Logamatic 4121 4122 and 4126 Subject to technical modifications Extended functions 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 autom
75. to delete the Monday heating phase from 11 30 h to 13 00 h to create one single heating pause from 08 00 h to 17 00 h Your modified program will be saved under the program name Own and the number of the heating circuit A 1 2 06 00 08 00 11 30 13 00 17 00 22 00 B 1 p 3 06 00 08 00 17 00 22 00 7 747 012 053 12 1RS Fig 17 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 Midday program Monday at 06 00 21 C Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 59 ea Additional programming options Turn the rotary selector to the start point of the heating phase you want to delete here 11 30 Q Midday program Monday at 11 30 21 C i Hold down Time and turn the rotary selector to the stop point of the heating phase you want to delete here 13 00 Q If you have selected the stop switching point of the heating phase yo
76. tor By turning the rotary selector you modify the values that flash on the display Release key Modified values are saved Back key Exit menu 7 3 Displaying operating values Heating circ O Set room 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 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 Operating state DHW circulation pump and cylinder primary pump Only if a DHW function is installed Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 29 Extended functions 7 4 Changing the permanent display oO Common flow Date 45 C 20 08 2001 Buderus You can determine the permanent display of the p
77. u want to delete the bottom line will show eight blocks that are deleted in one second intervals from left to right The heating phase has been deleted when no blocks are left Switch period is deleted EERERENE The deleting process will be terminated if you release the Time key prematurely or turn the rotary selector back In this 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 is saved under Own program 2 Preg Own program and the relevant heating circuit number here 2 Monday ee You can call up your new program by pressing Prog and turning the rotary at 7 00 selector gt Chapter 7 10 O Press Back to return to the permanent display Buderus 60 Logamatic 4121 4122 and 4126 Subject to technical modifications Additional programming options EN 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 onto the start point of the next phase Example Starting from the Midday program for heating circuit 2 you want to join the Monday heating phase from 11 30 h to 13 00 h to the heating phase 17 00 h to 22 00 h In other words you want to heat continually from 11 30 until 22 00 h
78. with the rotary selector here 21 C You cannot freely enter any temperature here Only the factory set day and night temperatures are available which you can however modify yourself gt Chapter 6 4 Release Temp to save your input 64 Logamatic 4121 4122 and 4126 Subject to technical modifications Additional programming options a Only after all three details day time temperature have been set 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 at a e Enter the second switching point Monday Friday 21 00 h 17 C e Enter the third switching point Saturday Sunday 09 30 h 21 C e Enter the fourth switching point Saturday Sunday 23 30 h 17 C To enter the second to fourth switching points you only need to repeat the steps described above En Press Back to return to the permanent display only after all switching points have been correctly entered 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 Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 65 En Additional programming options 8 3 Creating a new DHW program
79. ws 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 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 Outside temperature Required room temperature Type of construction insulation of the building Wind chill factor Radiant energy from the sun 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 Retu
80. xed times This automatic changeover is effected via a time switch Before you utilise this option consider the following At what time in the morning should your home be warm Is this time also subject to the day of the week Are there days when you don t want to heat From what time in the evening 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 heating contractor whether this function has been enabled 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 11 Example for a standard program here Family program from Monday to Thursday 1 Day mode 2 Night mode USER INFORMATION 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 4121 4122 and 4126 Subject to technical modifications 37 7 9 2 Time switch program for DHW You may enter your
81. ys may 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 Either 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 Buderus Logamatic 4121 4122 and 4126 Subject to technical modifications 19 ea Standard functions 6 3 Selecting the operating mode J Buderus 20 You can 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 does this for you It changes over between day mode standard mode and night mode setback mode The times at which your heating system changes from day to night mode and vice versa are factory set via standard programs gt Chapter 7 10 However you or your heating contractor can modify these settings gt Cha

Operating Instructions Logamatic 4121, 4122 and 4126

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