Buderus Logamatic 4321 Operating Instructions Manual Download Page 21

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Basic functions

Logamatic 4321/4322 - Technical specifications are subject to change without prior notice.

6.3.2 Selecting manual mode

Press either "Day mode" or "Night mode" to change to manual mode.

Press "Day mode".

The LED of the day mode button lights up. Now your heating system is in
constant day mode (standard mode).

Press "Night mode".

The LED of the night mode button lights up. Now your heating system is in
constant night mode (setback heating mode), and operates at a lower room
temperature.

room temp set

day mode always

70°F

room temp set

night mode alwys

63°F

USER NOTE

If you have selected manual mode, other automatic controls will also be
switched off, e.g. the summer/wintertime changeover (

Chapter 7.13).

Summary of Contents for Logamatic 4321

Page 1: ...Operating Instructions Control panel Logamatic 4321 4322 6 720 617 492 11 2008 US CA For the user Please read carefully before use ...

Page 2: ...nt display 18 6 3 Select operating mode 19 6 4 Set the room temperature 22 6 5 Heating domestic hot water 24 7 Extended functions 26 7 1 Buttons for extended functions 26 7 2 Controlling the extended functions 27 7 3 Displaying operating values 27 7 4 Changing the permanent display 28 7 5 Setting the date and time 29 7 6 Selecting a heating zone 30 7 7 Adjusting the room temperature for another he...

Page 3: ...rogram by inserting deleting set points 50 8 2 Creating a new heating program 59 8 3 Creating a new DHW program 62 8 4 Creating a new DHW recirculation pump program 63 9 Modules and their functions 64 9 1 ZM434 burner and boiler circuit module standard equipment 65 9 2 FM441 function module accessory 67 9 3 FM442 function module accessory 69 10 Boiler flue gas test 70 11 Correcting faults and trou...

Page 4: ...the priority The control panel which is controlled by the MEC2 remote control 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 remote control is the central control Some functions that you may need are located behind a flap The buttons behind this flap enable you to make var...

Page 5: ...f the options offered by your heating system the more advantage you will be able to take of them How does your heating system work Your heating system comprises the boiler with burner the heating control panel the piping and the radiators or radiation of some type A DHW storage tank or an instantaneous water heater heats the water used for shower bath or washing your hands Depending on the way you...

Page 6: ...lves 5 All radiators are supplied with the same supply temperature The heat transferred to the room depends on the radiator surface and the boiler water throughput Therefore the heat transfer can be manipulated via the radiator valves What determines the heat demand of a room The heat demand of a room largely depends on the following factors outdoor temperature the desired room temperature the typ...

Page 7: ...t influence the room temperature and compensates for these What does the heating control panel calculate Advanced control panels calculate the boiler temperature the so called supply temperature subject to the outdoor temperature The relationship between the outdoor temperature and the supply temperature is described as the heating curve The lower the outdoor temperature the higher the supply temp...

Page 8: ...ources e g an open fireplace Now the control panel 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 radiator valves if equipped in the reference room fully open Weather compensated control with room temperature ...

Page 9: ...own to reduced heating the boiler will remain shut down as long as the room temperature exceeds a set level This function is only available if a room temperature sensor is installed When changing from total shutdown to reduced heating based on outdoor temperature the boiler will remain shut down as long as the outdoor temperature exceeds a preset level What are heating zones A heating zone describ...

Page 10: ... least 20 0 50 m Otherwise the heated air cannot circulate and heat the room adequately z In rooms you occupy during the day you can for example set a room temperature of 70 F 21 C whilst 63 F 17 C may be sufficient at night To achieve this use the standard heating mode day mode and the setback mode night mode Æ Chapter 6 z Never overheat rooms overheated rooms are unhealthy plus they waste money ...

Page 11: ...ms of the heating system and can lead to incorrect system functions z Maintenance repairs and fault diagnosis must be carried out by trained technicians only USER NOTE Observe all regulations and standards applicable to installation and operation of the system in your country USER NOTE All electrical components must be approved for the USA and Canada This product has been tested and certified and ...

Page 12: ... that only personnel trained to operate the appliance correctly have access to it WARNING RISK OF SCALDING During thermal disinfection the entire DHW system is factory set to be heated to 158 F 70 C start time Tuesday night at 1 00 am 01 00 Hot water temperatures above 122 F 50 C can cause scalding almost immediately z The default start time can be changed to another time by a heating contractor i...

Page 13: ...erature limiter 2 Manual boiler thermostat 3 L1 L2 Fuses 4 Connection for external service equipment and MEC2 5 Burner emergency operation switch 6 On Off switch Fig 5 Modules installed 1 Slot 1 e g FM442 heating zone 1 heating zone 2 2 Slot 2 e g FM442 heating zone 3 heating zone 4 A Slot A ZM434 boiler loop burner B Slot B MEC2 CM431 MEC2 remote control 3 Slot 3 e g FM441 heating zone 5 DHW reci...

Page 14: ...he button then turn the dial When the button is released the new value is implemented and saved You can reach certain functions such as day room temperature night room temperature and possibly the DHW temperature or the automatic heating mode directly via the corresponding buttons Æ Fig 6 1 to 3 and 6 Behind a flap Æ Fig 6 7 additional buttons are available for further settings e g for entering we...

Page 15: ...1RS 1 Display 2 Dial 3 Continuous heating mode 4 Automatic heating mode by timer 5 Continuously reduced heating mode 6 Input day 7 Input vacation days 8 Select standard display 9 Display for set nominal room temperature 10 Input DHW temperature reloading 11 Set the time 12 Change temperature values 13 Warm weather shut down WWSD temperature 14 Back to standard display 15 Select a timer program 16 ...

Page 16: ...ng the ON OFF switch to I Æ Fig 8 1 After approximately 2 minutes all modules installed in the control panel are recognized and the standard display is shown 5 4 Switching off the control panel z Switch the control panel OFF by setting the ON OFF switch to 0 Æ Fig 8 1 z In an emergency Isolate the heating system from the mains supply with the emergency shut off switch outside of the boiler room or...

Page 17: ...tting the DHW temperature Loading DHW once 6 1 Simple operation The standard functions are controlled by pressing one of the buttons on the Standard functions keypad or by turning the dial 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 button lights up day mode is enabled Set the desired room temperature by tu...

Page 18: ...nstalled in the control panel or is installed as a wall mounted remote control unit Factory set permanent display if the MEC2 is installed in the control panel Factory set permanent display if the MEC2 is installed as a wall mounted remote control unit USER NOTE If your heating system is equipped with several heating zones first select the correct heating zone Æ Chapter 7 6 Only then can you selec...

Page 19: ...omatic changeover of the MEC2 remote control does this for you It switches between day mode standard mode and night mode setback mode The times when your heating system changes from day to night mode and vice versa are factory set via standard programs Æ Chapter 7 10 However you or your heating contractor can modify these settings Æ Chapter 7 12 Manual operation For example if you want to heat lon...

Page 20: ...ress AUT The LED of the AUT button is on automatic mode is active In addition either the Day mode or Night mode LED will light up This is subject to the set times for day and night mode Automatic day and night mode At fixed times central heating is provided or the room temperature is set back AUT room temp set automatic day 70 F Fig 9 Changeover from day and night mode at fixed times example 1 Day...

Page 21: ...up Now your heating system is in constant day mode standard mode Press Night mode The LED of the night mode button lights up Now your heating system is in constant night mode setback heating mode and operates at a lower room temperature room temp set day mode always 70 F room temp set night mode alwys 63 F USER NOTE If you have selected manual mode other automatic controls will also be switched of...

Page 22: ...temperature is 70 F 21 C The factory setting for the night room temperature is 63 F 17 C Any adjustment applies to all heating zones allocated to the MEC2 remote control Æ Chapter 7 7 6 4 1 For the current operating mode You are currently in automatic Day mode and would like to change the room temperature Condition For this the user interface flap must be closed Turn the dial to the desired day ro...

Page 23: ...o change the set night temperature Hold down Night mode and select the desired night room temperature with the dial here 61 F 16 C Release the Night mode button The selected night temperature is now set to 61 F 16 C The selected permanent display will then appear again Press AUT The AUT LED lights up automatic mode is re enabled room temp set night mode alwys 61 F AUT USER NOTE If you are currentl...

Page 24: ...ng To save energy DHW heating will be stopped outside the programmed times i e DHW is not heated in night mode DHW heating is factory set to 140 F 60 C in automatic mode We recommend heating the DHW storage tank once in the morning before central heating begins and reheating once in the evening if necessary Æ Fig 10 Fig 10 Example DHW heating 1 Day mode 2 Night mode 3 OFF 1 2 3 6 00 pm 18 00 9 00 ...

Page 25: ...ger amount of DHW proceed as follows Press DHW The DHW LED flashes and a single DHW charge is started Depending on the size of the storage tank and the boiler output DHW will be available after approximately 10 to 30 minutes With instantaneous water heaters or combination boilers DHW is available almost immediately WARNING RISK OF SCALDING from DHW Hot water temperatures above 122 F 50 C can cause...

Page 26: ...ng system Set the time Set date Adjust heating zones Select a heating program Set the room temperature for additional heating zones The buttons for the extended functions are located behind the flap of the MEC2 remote control 7 1 Buttons for extended functions Fig 11 Buttons for the extended functions 1 Input day 2 Input vacation days 3 Select standard display 4 Set the time 5 Change temperature v...

Page 27: ...You can display and control the various operating values of the boiler of the selected heating zone and the system Only the operating values of the selected heating zone e g heating zone 1 are displayed Æ Chapter 7 6 z Open flap Turn the dial clockwise without pressing any other button Depending on the modules various of the following operating displays can be called up Burner and run time Actual ...

Page 28: ...r interface The following permanent displays are available Boiler temperature or system supply if MEC2 is wall mounted Outdoor temperature DHW Time Date Only if a DHW module has been installed Hold the Display button down and select the desired permanent display with the dial here date Release the Display button The selected permanent display has now been saved system supply date 08 20 2009 113 F ...

Page 29: ... using the dial here 20 Release Weekday to save your input Press Weekday again to enter the month Press Weekday again to enter the year The flashing item can be modified with the dial Setting the time Hold down Time and select the desired time with the dial The time is set in one minute steps Release Time to save your input USER NOTE Date and time are preset at the factory This function is backed ...

Page 30: ...hange Depending on the equipment level of your heating system the following heating zones can be selected MEC2 heating zones all heating zones assigned to the MEC2 Æ Chapter 7 8 Heating zone 1 8 DHW DHW recirculation z Open flap Hold down Heating zone and select the desired heating zone with the dial here heating zone 2 Release the Heating zone button The displayed heating zone is now selected As ...

Page 31: ... MEC2 heating zones all heating zones assigned to the MEC2 Æ Chapter 7 8 Heating zone 1 8 If several heating zones are assigned to the MEC2 the temperature for these heating zones can only be adjusted for all Otherwise a fault message selection not supported MEC heatingzones select will appear In such cases select MEC heatingzones z Open flap Hold down Heating zone and select the desired heating z...

Page 32: ...on to save your input The day room temperature is now adjusted to 70 F 21 C The selected permanent display will then appear again room temp set automatic day 70 F USER NOTE If you want the adjust the temperature for an operating mode that is not the current mode first select the corresponding operating mode e g by pressing Night mode After changing the temperature reset the operating mode to the p...

Page 33: ...is assigned to the MEC2 and you want to make one of the above adjustments the fault message selection not supported MEC heatingzones select will appear Select MEC heatingzones to program these settings Æ Chapter 7 6 Individual heating zones The following adjustments can only be implemented for each individual heating zone separately Select the standard program Change the standard program by moving...

Page 34: ...n the day of the week It may vary how long it takes your heating system to heat up individual rooms This will be subject to the outdoor temperature the building insulation and the drop in room temperature The optimization function of the user interface 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...

Page 35: ...ailable at the selected time If you require additional hot water you may at short notice heat DHW with the ext DHW load function Æ Chapter 6 5 2 Fig 13 DHW heating begins 30 minutes before day mode of the first heating zone and ends with the beginning of night mode of the last heating zone A Heating zone 1 B Heating zone 2 C DHW 1 Day mode 2 Night mode USER NOTE DHW will not be subject to a temper...

Page 36: ...ry z Open flap z Select a heating zone Æ Chapter 7 6 Press and hold down PROG Initially the selected heating zone is displayed for setting the standard program Approximately 2 seconds later the designation of the currently selected standard program will appear Select the desired standard program with the dial here seniors Release the PROG button The displayed program is now selected The display sh...

Page 37: ... 23 00 afternoon Part time work in the afternoon Mo Th Fr Sat Sun 6 00 am 06 00 6 00 am 06 00 6 30 am 06 30 7 00 am 07 00 11 30 am 11 30 11 30 am 11 30 11 30 pm 23 30 10 00 pm 22 00 4 00 pm 16 00 3 00 pm 15 00 10 00 pm 22 00 11 00 pm 23 00 midday Midday at home Mo Th Fr Sat Sun 6 00 am 06 00 6 00 am 06 00 6 00 am 06 00 7 00 am 07 00 8 00 am 08 00 8 00 am 08 00 11 00 pm 23 00 10 00 pm 22 00 11 30 a...

Page 38: ... zone The heating program memory is available for this The following example shows how the set points of the standard program family can be changed for the days Monday to Thursday z Open flap z Select a heating zone here heating zone 2 Æ Chapter 7 6 Hold down PROG and select the desired standard program with the dial Release the PROG button The first set point Monday 5 30 am 05 30 h appears Fig 14...

Page 39: ...ime The newly adjusted time for the OFF set point is saved Next set point Continue to turn the dial until the next set point is displayed The next set point Tuesday 5 30 am 05 30 h appears Also change the following set points to 6 30 am 06 30 h and 11 00 pm 23 00 h The system will now heat from 6 30 am to 11 00 pm 06 30 h to 23 00 h Monday to Thursday Press Back to return to the permanent display ...

Page 40: ...tomatically changes over between summer and winter mode Summer mode Heating operation is switched off if the Adjusted outdoor temperature exceeds the factory set changeover threshold of 63 F 17 C Summer mode is identified on the display with the icon DHW heating remains operational Press Day mode if you want to heat at short notice although the system is in summer mode The heating system returns t...

Page 41: ...elow which you want to heat here 64 F 18 C The display shows the set changeover temperature Release Su Wi to save your input Setting continuous summer mode z Select a heating zone Æ Chapter 7 6 Example Heating zone 2 Hold down Su Wi The display briefly shows the heating zone Then turn the dial to a changeover temperature below 50 F 10 C The display shows summr mode alwys Release Su Wi to save your...

Page 42: ...nstant operation After approximately three seconds the permanent display will appear again automatic 30 minutes before the first heating zone is switched on the DHW storage tank will heat the water to the set temperature and stop when the last heating zone is switched off factory setting Alternatively you can enter your own DHW program Æ Chapter 8 3 Press Automatic to select automatic mode After a...

Page 43: ... The DHW recirculation pump will operate at the set interval i e independently of the heating zones Press Day mode to select constant operation After approximately three seconds the permanent display will appear again automatic 30 minutes before the first heating zone is switched on the DHW recirculation pump starts to run at the set interval and stops when the last heating zone is switched off fa...

Page 44: ...room temperature of 54 F 12 C for example z Select a heating zone Æ Chapter 7 6 Example Heating zone 2 Enter vacation function Hold Vacation down and select the desired number of days with the dial here 5 The display shows 5 Release Vacation to save your input USER NOTE As the vacation function is enabled immediately after completing your entry you should only enter this function on the day of you...

Page 45: ...e and setting the number of vacation days to 0 vacation days room temp set 54 F 5 USER NOTE DHW heating and DHW circulation will be switched off automatically if DHW is heated subject to the heating zones program selction heating zone Æ Chapter 8 3 and all heating zones are set to vacation mode You cannot enter a separate DHW vacation function USER NOTE A separate DHW vacation function can be ente...

Page 46: ...rupt the vacation function at any time by pressing Day mode In this case the system heats according to the set room temperature Æ Chapter 6 4 Continuing the vacation function Press AUT to continue the interrupted vacation function Interrupting the vacation function Press Night mode The display shows night mode alwys You may interrupt the vacation function at any time by pressing Night mode In this...

Page 47: ... system returns to automatic heating mode If you want to cancel the party function call up party function as described above and turn the dial to 0 7 19 Setting the pause function This function only applies to heating zones the MEC2 has been assigned to as a remote control panel MEC heatingzones All heating zones without MEC2 continue to operate normally Enter the length of time the system should ...

Page 48: ...TING MEC Hold down Temp and turn the dial to the desired value here 1 0 F 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 73 5 F 22 5 C USER NOTE This function is only available if the MEC2 is installed within the living space If the room temperature shown on the display varies from the ...

Page 49: ...essage notice service call is displayed at a predetermined time on a particular date or after so many hours of operation z Open flap Turn dial You will see either service after date required or service after run time required z Inform the heating contractor to have the inspection and service done notice service call service after required date USER NOTE The automatic service message remains pendin...

Page 50: ...accurately matches your personal circumstances 8 1 Modifying the standard program by inserting deleting set points 8 1 1 Inserting set points You can interrupt heating phases by inserting set points details Weekday time temperature into an existing heating program Example The standard family program provides constant heating on Fridays from 5 30 am until 11 00 pm 05 30 h until 23 00 h Insert two n...

Page 51: ...ank mask new set point for the new set point Hold down Weekday and turn the dial to the desired 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 desired time with the dial here 10 00am 10 00 Friday at 10 00am 10 00 is now set as the new set point Release Time to sav...

Page 52: ...NOTE You cannot freely enter any temperature here Only the factory set day and night temperatures are available which you can however modify yourself Æ Chapter 6 4 USER NOTE Only after all three details day time temperature have been defined for the new set point will it be automatically saved under custom program and the heating zone number here 2 The saving process is not shown on the display Th...

Page 53: ...heating zone Æ Chapter 7 6 Example Heating zone 2 z Select the standard program for the chosen heating zone Æ Chapter 7 10 Example Family program The first set point start point Monday at 05 30am 05 30 at 70 F 21 C will be displayed Turn the dial to the set point you want to delete here 10 00pm 22 00 The set point to be deleted is displayed Simultaneously press and hold Vacation and Display Fig 17...

Page 54: ...the delete process is canceled Simultaneously release Vacation and Display to save your input The display shows the next set point The new program that has been modified by the deletion is saved under custom program and the relevant heating zone number here 2 You can call up your new program by pressing PROG and turning the dial Æ Chapter 7 10 Press Back to return to the permanent display family p...

Page 55: ...e both set points must be deleted Example In the daytime program for heating zone 2 you want to delete the Monday heating phase from 11 30 am to 1 00 pm 11 30 to 13 00 h to create one single heating pause from 8 00 am to 5 00 pm 08 00 to 17 00 h Your modified program will be saved under the program name custom and the number of the heating zone Fig 18 Deleting a heating phase A daytime program B N...

Page 56: ...he heating phase you 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 The deleting process will be terminated if you release the Time button prematurely or turn the dial back In this case all set points for the heating phase remain active Release Time to save your input The d...

Page 57: ... Example Starting from the daytime program for heating zone 2 you want to join the Monday heating phase from 11 30 am to 1 00 pm 11 30 to 13 00 h to the heating phase 5 00 pm to 10 00 pm 17 00 to 22 00 h In other words you want to heat continually from 11 30 am until 10 00 pm 11 30 until 22 00 h Your modified program will be saved under the program name custom and the number of the heating zone Fi...

Page 58: ...bine with the first heating phase here 05 00pm 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 button prematurely or turn the dial back In t...

Page 59: ...aved under custom program and the relevant heating zone number Example Monday Friday from 5 00 am 05 00 h 70 F 21 C from 9 00 pm 21 00 h 63 F 17 C Saturday Sunday from 9 30 am 09 30 h 70 F 21 C from 11 30 pm 23 30 h 63 F 17 C z Select a heating zone Æ Chapter 7 6 Example Heating zone 2 z Select the standard program program selction new for this heating zone Æ Chapter 7 10 The display shows the bla...

Page 60: ... dial here Mon Fri Release Weekday to save your input Hold Time down and select the desired time with the dial here 05 00am 05 00 The display shows the new set point Release Time to save your input Hold Temp down and select the desired temperature with the dial here 70 F 21 C You cannot freely enter any temperature here Only the factory set day and night temperatures are available which you can ho...

Page 61: ...oint for the next set point z Enter the second set point Monday Friday 9 00 pm 21 00 h 63 F 17 C z Enter the third set point Saturday Sunday 9 30 am 09 30 h 70 F 21 C z Enter the fourth set point Saturday Sunday 11 30 pm 23 30 h 63 F 17 C To enter the second to fourth set points you only need to repeat the previous steps Only after all set points have been correctly entered press Back to return to...

Page 62: ...he display shows the blank mask new set point for the new set point z Enter the set points Æ Chapter 8 2 DHW heating will now operate according to your custom program DHW You can call up your new custom program DHW by pressing PROG and turning the dial Æ Chapter 7 6 USER NOTE With the factory setting program selction heating zone DHW is heated 30 minutes prior to the first set point of all heating...

Page 63: ...hapter 7 10 here program selction new The display shows the blank mask new set point for the new set point z Enter the set points Æ Chapter 8 2 Your DHW recirculation pump will now operate according to your custom program CR You can call up your new custom program CR by pressing PROG and turning the dial USER NOTE With the factory setting program selction heating zone the DHW recirculation pump st...

Page 64: ...2 control panels the most commonly used function modules i e FM441 and FM442 function modules are described on the following pages Logamatic 4321 4322 Modules MEC2 remote control O X CM431 controller module O O ZM434 central module Burner boiler circuit functions O O FM441 function module 1 heating zone 1 DHW consumer X X FM442 function module 2 heating zones X X FM443 function module Solar circui...

Page 65: ...e of faults The burner can be controlled directly with the manual switch The control continues to operate Fig 21 ZM434 Display 0 General fault e g on site fault sensor fault external faults wiring faults internal module faults manual operation The fault messages are shown as plain text in the MEC2 remote control LEDs for burner functions Display 9 Burner fault Display A Burner operational Display ...

Page 66: ...ners the burner output can be variably increased using 5 and reduced using 6 AUT The burner is operating in automatic mode 0 The burner is switched OFF Exception If the switch for burner emergency mode is set to 4 max I II The burner is operated continuously at maximum output USER NOTE The manual switch should normally be set to AUT 3 If a boiler pump is installed it is switched on The boiler loop...

Page 67: ...ting zone 2 DHW 1 2 Display General fault e g on site fault sensor fault external faults wiring fault internal module fault manual mode The fault messages appear as plain text on the MEC2 remote control LEDs for the functions Display Mixing valve opening hotter Display Mixing valve closing colder Display Heating zone in summer mode Display DHW in night mode below the set temperature Display Heatin...

Page 68: ...1 Manual heating zone switch 2 DHW manual switch 1 2 for heating zone for DHW supply USER NOTE The manual switch should normally be set to AUT 3 The heating pump or tank primary pump is switched on The mixing valve is switched to zero volt and can be manually operated The DHW recirculation pump is switched off AUT The heating zone or DHW consumer operates in automatic mode 0 The heating pump or ta...

Page 69: ...d by LEDs Fig 24 FM442 function module 1 Heating zone x 2 Heating zone y 1 2 Display General fault e g on site fault sensor fault external faults wiring fault internal module fault manual mode The fault messages appear as plain text on the MEC2 remote control LEDs for the functions Display Mixing valve opening hotter Display Mixing valve closing colder Display Heating zone in summer mode Display H...

Page 70: ...test Q again to terminate the flue gas test During the flue gas test the MEC2 will show the display on the left WARNING RISK OF SCALDING During the flue gas test the hot water can reach a temperature in excess of 140 F 60 C Persons may be scalded at the taps z Use only mixed hot water during or after an emissions test Note that when single lever faucets are in their usual position the water drawn ...

Page 71: ...temperature sensor Outdoor temperature sensor Heating zone supply sensor heating zone 1 8 if installed DHW temperature sensor Boiler is cold DHW is cold DHW warning Remote control no communication with heating zone 1 8 if installed Disinfection Additional temp sensor Heating zone 1 8 if installed pump fault DHW pump fault DHW inert anode fault Safety fault Bus system no connection Multiple address...

Page 72: ...nstall MEC2 correctly Room cool Actual room temperature for the respective heating zone is incorrectly displayed Check the heating zone assignment Control panel operates in setback mode Check time and heating program and modify if required Set room temperature too low Correct set room temperature DHW supply runs for too long Check DHW heating Heat sources deliver insufficient heating energy or are...

Page 73: ...etely full of water Check whether the boiler is under at least 14 5 psi 1 0 bar pressure If this is the case Unlock the safety temperature switch by unscrewing the cap nut and pressing the reset button under it If not successful Notify heating contractor Remote control fault The control operates with the last values set at the remote control Notify heating contractor Boiler sensor fault Outdoor te...

Page 74: ... e g with the heating system emergency shut off switch or isolate the heating system from the mains supply by disengaging the heating system circuit breaker z Arrange for your heating contractor to rectify any heating system faults immediately CAUTION SYSTEM DAMAGE through the system overheating If the temperature is set incorrectly a radiant floor heating system could overheat z If an radiant flo...

Page 75: ...t settings If there is a fault in the controller you can continue to operate your heating system manually on a temporary basis z To safeguard DHW heating in the event of a fault set the manual module switches Æ Fig 26 to 3 z Set the boiler water thermostat Æ Fig 26 to 140 F 194 F 60 C 90 C for DHW heating to 140 F 60 C z Set burner emergency switch to W Burner stage 1 is always directly actuated B...

Page 76: ...e of fault inform the heating contractor immediately He will guarantee professional service It is helpful for the contractor if you can provide detailed information about the fault Fault Settings for an emergency operation ON OFF switch on Logamatic 4321 Switch Manual mode boiler zone ZM434 module Switch DHW manual mode Module FM441 Boiler water thermostat on the Logamatic 4321 Manual mode switch ...

Page 77: ...gram selection family early morning evening morning afternoon midday singles seniors new family DHW 86 F 140 F 30 C 60 C 140 F 60 C Warm weather shut down WWSD temperature 50 F 86 F 10 C 30 C summer mode always winter mode always 63 F 17 C Day room temperature 52 F 86 F 11 C 30 C 70 F 21 C Night room temperature 36 F 84 F 2 C 29 C 63 F 17 C Vacation room temperature 50 F 86 F 10 C 30 C 63 F 17 C T...

Page 78: ...t water 24 Heating phase 56 Heating program 26 34 36 Heating system emergency shut off switch 16 Heating zone 30 31 67 Heating zone and DHW consumer 68 Heating zones assignment 77 I Instantaneous water heater 5 K Keypad 14 L Light emitting diodes 67 69 M Manual mode 19 21 Manual operation 19 21 Matching the room temperature 48 Modules 64 Modules installed 13 N Night mode 9 19 21 O Operating values...

Page 79: ...Notes Logamatic 4321 4322 Technical specifications are subject to change without prior notice 79 ...

Page 80: ......

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