Viessmann Vitodens 242-F Instructions d'exploitation

Installation and serviceinstructionsfor contractorsVIESMANNVitodens 242-FType FB2ACompact Energy Tower with a gas condensing boiler4.8 to 26 kW natura

10Assembling the boiler9.8.7.6.5.1.3.2x4.2.Installation sequenceInstalling the boiler5418 193 GB

100Check the flue gas temperature sensorThe flue gas temperature sensor locks out the boiler when the permissible flue gastemperature is exceeded. Res

101Checking the plate heat exchangerNoteDrain the boiler on its heating water and DHW side.During removal, small amounts of water may trickle out and

1021. Pull the leads from temperature lim-iter A.2. Check the continuity of the tempera-ture limiter with a multimeter.3. Remove the faulty tempera

103Checking the fuseF11. Switch OFF the power.2. Release the side closures and pivotthe control unit down.3. Remove cover A.4. Check fuse F1 (see c

104Checking the solar control module fuse1. Switch OFF the power. 2. Check fuse A in the solar controlmodule (see connection and wiringdiagram).Exten

105In the delivered condition, the mixermotor is set up for the following mixerarrangement (heating return from theleft).HVKVHRFor the following mixer

106DHWSolar energyInformationSelect with 48°CHeatingBoiler temperatureHeating operationThe control unit determines a set boilerwater temperature subje

107The primary cylinder is heated up to theset DHW temperature. Heating stopswhen the set temperatures have beenreached at the cylinder temperature se

108Internal extension H1The internal extension H1 is integratedinto the control unit casing. The cylinderprimary pump is connected to relay out-put sK

109Internal extension H2 (accessories)The internal extension H2 is integratedinto the control unit casing instead of theinternal extension H1. The cyl

11Connections on the heating water and the DHW sideShown with connection sets for finished walls (accessories)AHeating flow R ¾"BDHW R ½"CDH

110External extension H1The external extension is connected tothe boiler control unit via the KM BUS.The following functions can be controlledor proce

111External extension H2The external extension is connected tothe boiler control unit via the KM BUS.The following functions can be controlledor proce

112External heating program changeoverThe "External heating program change-over" function is connected via externalextension input "aVD

113External blockingThe "External blocking" function is con-nected via external extension input"aVD".In coding address "32&qu

114Screed drying functionThe screed function enables screeds tobe dried. For this, always observe thedetails specified by the screed manufac-turer.Whe

115Temperature profile 3: Code "F1:3"Flowtemperature °CDays50403020101 5 10 15 20 25 30Temperature profile 4: Code "F1:4"Flowtempe

116Temperature profile 6: Code "F1:6"Flowtemperature °C1 5 10 15 20 25 30Days504030201060Temperature profile 7: Code "F1:15"Flowte

117Example using the settings in the delivered conditionOutside temp. in °CBoiler water orflow temperature in °CA8070605040300 -5 -10 -15510Set room t

118Example using the settings in the delivered condition100203030405060600700800900Set boiler water or flowtemperature in °CTime in hABCDAStart of ope

119Remote control DIP switch settingThe remote control affects the heating cir-cuit without mixer A11 2 3 4ONThe remote control affects the heating ci

12DHW circulation connectionDHW circulation connection withDHW circulation pump connectionset (accessory)Separate installation instructionsConnections

120Air factor λ – CO2/O2 contentAir factorλO2 content(%)CO2 content (%)for natural gasECO2 content (%)for natural gasLLCO2 content(%) for LPG P1.24 4.

121A1 Main PCBX... Electrical interfaces§Boiler water temperature sensor$Outlet temperature sensoraAIonisation electrodeaGFlue gas temperature sensord

122ABA1 Main PCBA2 Power supply unitA3 OptolinkA4 Burner control unitA5 Programming unitA6 Coding cardDesignsExternal connection diagram5418 193 GB

123A7 Connection adaptorA8 LON communication moduleA9 Internal extension H1S1 ON/OFF switchS2 Reset buttonX... Electrical interfacesAKM BUS to the sol

124ABA1 Main PCBX... Electrical interfacesAKM BUS from the control unitBPower supply from the control unit%Cylinder temperature sensor&Collector t

125Spare parts informationQuote the part and serial no. (see typeplate) and the item number of therequired part (as per this parts list).Obtain standa

126082 Gasket set A 10 x 15 x 1.5084 Gasket 23 x 30 x 2.0085 O-ring gasket set 17.86 x 2.62086 O-ring 9.6 x 2.4087 O-ring 14.3 x 2.4088 O-ring 35.4 x

127310 Cable harness X8/X9/Ionisation311 Cable harness 100/35/54 (auxiliaryearth)312 Cable harness stepper motor313 Mating plug set314 Cable fixing317

128208061065070062063069061074067206072071081066075068205092004003060064031Parts listsParts lists (cont.)5418 193 GB

129007204208090090005008006202208140090211200207Parts listsParts lists (cont.)5418 193 GBService

13Separate installation instructionsSet the safety valve on the solar side andthe pressure gauge for the solar circuiton site.NoteRoute the blow-off p

130303309304301305307308302029097300315316315316112086318322Parts listsParts lists (cont.)5418 193 GB

131019002096082001011095010040092095010099021023099085034013107085089032028141142096088015100012103105102016017104100106020093Parts listsParts lists (

132131027134054094035028051094055038096055050056057142133130052106087084039098099084084080080105084110053 097086086058059Parts listsParts lists (cont.

133165167166164160111037089094080033080030080080162085036094025026024098084087080084171172173143080162151150Parts listsParts lists (cont.)5418 193 GBS

134094084084044022080041084 174 084115048145047080094 084115084114084132135042045080080046043Parts listsParts lists (cont.)5418 193 GB

135Setting and test val-ues Set value Commis-sioningService Date: By: Static pressure mbar max. 57.5 mbar Supply pressure (f

136Rated voltage 230 VRated frequency 50 HzRated current 6 AProtection class IProtection IP X 4 D toEN 60529Permissible ambient temperature during op

137Declaration of conformity for the Vitodens 242-FWe, Viessmann Werke GmbH&Co KG, D-35107 Allendorf, confirm as sole respon-sible body that the p

138We, Viessmann Werke GmbH&Co KG, D-35107 Allendorf, confirm that the productVitodens 242-F complies with the NOx limits specified by the 1st BIm

139AAcknowledging a fault display...85BBoiler temperature sensor...96Brief scans...81Bur

14NoteFor the tightness test, use only suita-ble and approved leak detectingagents (EN 14291) and devices.Leak detecting agents with unsuita-ble conte

140LLON...56 Fault monitoring...57 Setting subscriber numbers...

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144ApplicabilityCompact gas condensing boilerType FB2A from serial no.4.8 to 19 kW 7423 015 ...6.5 to 26 kW 7374 980 ...Viessmann LimitedHortonwood 30

151.3.2.2x5.4.7xInstallation sequenceOpening the control unit casing5418 193 GBInstallation

16Information regarding the connection of accessoriesFor the connection, observe the separate installation instructions providedwith the accessory com

17DangerIncorrect core terminationcan cause severe injuriesand damage to the equip-ment.Take care not to interchangecores "L1" and "N&q

18Connecting the collector temperature sensorNoteSolar control module A is attached tothe l.h. side of the air box.B% &aVGA%Cylinder temperature s

19Routing the connecting cables!Please noteConnecting cables will be damaged if they touch hot parts.When routing and securing power cables on site, e

2Please follow these safety instructions closely to prevent accidents and mate-rial losses.Safety instructions explainedDangerThis symbol warns agains

201.4.2.5.3.2x6.Close control unit casing and insert pro-gramming unit, packed separately.NoteThe programming unit can also be usedin a wall mounting

21Wall mounting base installationinstructionsInstallation sequenceClosing the control unit casing (cont.)5418 193 GBInstallation

22For further information regarding the individual steps, see the page indicatedCommissioning stepsInspection stepsMaintenance steps Page• •1. Removin

23Commissioning stepsInspection stepsMaintenance steps Page•23. Checking the neutralising system (if installed)•24. Checking the anode connection...

24Removing the front panelsSee page 10, steps 1 to 5.Filling the heating system!Please noteUnsuitable fill water increases the level of deposits and c

25NoteIf the control unit has not beenswitched ON prior to filling the sys-tem, then the servomotor of thediverter valve will still be in its centralp

26Setting the time and date (if required)During commissioning, or after pro-longed time out of use, the time and dateneed to be reset.Extended menu:1.

27NoteFor function and sequence of theventing program, see page 113.3. Check the system pressure.Activating the venting function:1. Press OK and s

28Filling the solar circuitSolar thermal system installation and service instructionsASolar circuit fill valve!Please noteOverheated collector areas a

29Enter names for heating circuits: Operating instructionsChecking the gas typeThe boiler is equipped with an electronic combustion control unit that

3If you smell flue gasDangerFlue gas can lead to life-threat-ening poisoning. Shut down the heating system. Ventilate the boiler room. Close all do

30Gas type conversion (only for operation with LPG)121. Set adjusting screw A at the gastrain to "2".2. Switch ON/OFF switch ON.3. Select

31 Yes IgnitionNoFault F4 Check the ignitionmodule (controlvoltage 230 Vacross plugs"X2.1" and "X2.2") Yes

32 Yes Automatic calibra-tion of the com-bustion controlunitNo Fault Eb Check the con-necting cable andthe ionisation elec-trode, check the

335. Start the boiler.NoteDuring commissioning, the boiler canenter a fault state because of airlocksin the gas line. After approx. 5 s pressthe rese

344. "Change?" Select "Yes".A value flashes on the display (e.g."85"). In the delivered condition, thisvalue represents

35Burner removal4x1. Switch ON/OFF switch at the con-trol unit and the main power supplyOFF.2. Close the gas shut-off valve and safe-guard against

363. Pull electrical cables from fan motorA, gas valve B, ionisation elec-trode C, ignition unit D and earthtab E.4. Undo gas supply pipe fitting F.5

371. Remove electrodes B.2. Undo three retaining clips C at ther-mal insulation ring D and removethermal insulation ring D.3. Undo four Torx screws a

381. Use a vacuum cleaner to remove res-idues from the heat exchanger Ainside the combustion chamber. 2. If required, spray slightly acidic,chloride

39Checking the condensate drain and cleaning the siphon1. Check that the condensate can drainfreely at the siphon.2. Pull retaining clip A off.3. Pul

4Installation instructionsPreparing for installationProduct information...

40Checking the anode connectionCheck that the earth lead is connected tothe magnesium anode.AB1.2.AMagnesium anodeBEarth cableTesting the anode earth

41ACB1. Remove cover A.2. Pull earth lead B from tab C.3. Connect the tester (up to 5 mA) inseries between tab C and earthcable B. The anode is OK i

42Draining the boiler on the DHW side1. Connect hose to drain valve androute into a suitable container or drainoutlet.NoteEnsure adequate ventilation

43Cleaning the primary cylinderNoteEN 806 specifies a visual inspection and (if required) cleaning every two years afterthe cylinder has been taken in

447. Remove loose deposits with a highpressure cleaner.!Please noteWhen cleaning the inside, only use plastic cleaning uten-sils.8. Use a chemical c

45Returning the primary cylinder into useFEACDB1. Reconnect the primary cylinder to thepipework.2. Insert new gasket A underneathflange lid B.3. Fit

46Checking the diaphragm expansion vessel and system pressureNoteCarry out this test on a cold system.1. Drain the system, until the pressuregauge in

47Checking the combustion qualityThe electronic combustion control unit automatically ensures an optimum combustionquality. Only the combustion values

487. Check the CO2 content. Should theactual value deviate from the aboveranges by more than 1%, implementsteps from page 47.8. After testing, press

49System version 1One heating circuit without mixer A1312wPwQ1Vitodens 242-F2Outside temperature sensor 3Heating circuit without mixer A1wPSolar colle

5Function descriptionInternal extensions... 108External ex

50System version 2One heating circuit with mixer M2 and a low loss header1M34567298wPwQ1Vitodens 242-F2Outside temperature sensor3Heating circuit with

51System version 3One heating circuit without mixer A1 and one heating circuit with mixer M21M3 456782wPwQ1Vitodens 242-F2Outside temperature sensor3H

52System version 4One heating circuit without mixer A1, one heating circuit with mixer M2 andsystem separation12345769M8wPwQqP1Vitodens 242-F2Outside

53System version 5One heating circuit with mixer M1 (with Vitotronic 200-H), one heating circuitwith mixer M2 (with extension kit) and low loss header

54Adjusting the heating curvesThe heating curves illustrate the relation-ship between the outside temperatureand the boiler water or flow tempera-ture

55Changing the slope and levelABBoiler water orflow temperature in °C90+20 -20Outside temperature in °C3.51.40.2AChanging the slopeBChanging the level

56Reduced room temperature +20 14 590-20D EACBExample 2: Adjustment of the reducedroom temperature from 5 °C to 14 °CABoiler water temperature or f

57Boiler control unit Vitotronic 200-H Vitotronic 200-H VitocomLON LON LONSubscriber no. 1Code "77:1"Subscriber no. 10Code "77:10"

584. Select subscriber (e.g. subscriber10).The subscriber check for the selectedsubscriber is introduced. Successfully tested subscribersare designa

59Fitting the front panels4.2.2x1.5.3.Commissioning, inspection, maintenanceFurther details regarding the individual steps (cont.)5418 193 GBService

6Vitodens 242-F, FB2ASet up for operation with natural gas H.For conversion to LPG P (without conversion kit), see page 30.The Vitodens 242-F should g

60Instructing the system userThe system installer must hand the oper-ating instructions to the system user andinstruct him/her in the operation of the

61Note The codes are displayed as plain text. Codes that have no function due to theheating system equipment level or thesetting of other codes are

62Coding in the delivered condition Possible changeInternal circulation pump function51:0 Internal circulation pumpis always started whenthere is a he

63Coding in the delivered condition Possible changeExt. Heating program changeover to heating circuit91:0 No external heating pro-gram changeover viae

64Coding in the delivered condition Possible changeService status24:0 No "Service" display 24:1 "Service" display (theaddress is a

65Coding in the delivered condition Possible changeExt. pump demand34:0 Influence of the signal"External demand" on thecirculation pumps: Al

66CodingCoding in the delivered condition Possible changeSet DHW temperature with reheating suppression67:40 Subject to the current out-put of the sol

67Coding in the delivered condition Possible changeFlow rate0F:70 The flow rate in the col-lector circuit at the maxi-mum pump speed is setto 7 l/min.

68Coding in the delivered condition Possible changeSummer eco function absoluteA6:36 Extended economy modedisabledA6:5toA6:35Extended economy controle

69Coding in the delivered condition Possible changeWeather-compensated/ room temperature hook-upb0:0 With remote control:Heating mode/reducedmode: (ch

76519962008100719464050136714221477153215871642169717521807187519301135110014060320370436449440552203302245059550600CFDABEGHASolar return R ¾"BHe

70Coding in the delivered condition Possible changeFlow temperature maximum limitC6:74 Electronic maximum flowtemperature limit set to74 °CC6:10toC6:1

71Coding in the delivered condition Possible changeStart temperature raisingF8:-5 Temperature limit for ter-minating the reducedmode -5 ºC, see exampl

72Note In coding level 2, all codes are acces-sible, including the codes from codinglevel 1.The following lists only those codesnot accessible in cod

73Coding in the delivered condition Possible change6E:50 Never adjust 76:0 Without LON communi-cation module 76:1 With LON communicationmodule (aut

74Coding in the delivered condition Possible change94:0 Without Open Thermextension94:1 With Open Therm exten-sion (automatic recogni-tion)95:0 Withou

75Coding in the delivered condition Possible change28:0 No burner interval igni-tion28:1to28:24Time interval adjustablefrom 1 to 24 h. The burneris fo

76Coding in the delivered condition Possible change65:... Information regarding thetype of diverter valve; donot adjust. 65:0 No diverter valve 65:

77Coding in the delivered condition Possible change01:4 The solar circuit pump isstopped when the differ-ential between the collec-tor temperature and

78Coding in the delivered condition Possible change0b:0 Collector frost protectionfunction switched off0b:1 Collector frost protectionfunction switche

79!Please noteIf a value is selected below 1 °C, there is a risk of pipes outside the thermalenvelope of the building freezing up.The standby mode, in

8NoteThe adjustable feet give all height meas-urements a tolerance of +15 mm.1. Prepare the heating water connec-tions.Flush the heating system thor-

80Coding in the delivered condition Possible changeb2:8 With remote control andfor the heating circuit,operation with room tem-perature hook-up must b

81Operating data can be scanned in the following areas: General Heating circuit 1 Heating circuit 2 (if heating circuit with mixer installed) DHW

82Diagnose Kurzabfrage2:1:3:4:Wählen mit Ø0001 F000 0000 A000 0001 2000For an explanation of the relevant values in the individual lines, see the fol-

83Line (briefscan)Field 1 2 3 4 5 6 Boiler Heating circuit A1(without mixer)Heating circuit withmixer M27: 0 0 Remotecontrol0 w/o1 Vitotrol2002 Vito

84Display ExplanationOutput internal ONOutput sK Internal extensionHeating circ pump A1ONConnection to external extension H1Cyl. prim. pump ON Connect

85If there is a fault, the red fault indicatorA flashes. " " flashes on the displayand "Fault" is shown.R01234barAThe fault code i

86Fault codeon the dis-playSystem characteris-ticsCause Measures10 Controls as if the out-side temperaturewere 0 °CShort circuit, out-side temperature

87Fault codeon the dis-playSystem characteris-ticsCause Measures59 No DHW heating Lead break, outlettemperature sen-sorCheck sensors (seepage 96)92 No

88Fault codeon the dis-playSystem characteris-ticsCause MeasuresA9 The burner operatesat its lower output if aheating circuit withmixer is connected.T

89Fault codeon the dis-playSystem characteris-ticsCause MeasuresbE Control mode Vitotrol remotecontrol incorrectlyprogrammedCheck remote control DIPsw

94. Prepare the gas connection accord-ing to TRGI or TRF or all local regu-lations.5. Prepare the electrical connections. Power supply cable: NYM-J

90Fault codeon the dis-playSystem characteris-ticsCause Measuresdb Control mode withoutroom influenceShort circuit, roomtemperature sen-sor, heating c

91Fault codeon the dis-playSystem characteris-ticsCause MeasuresEC Burner in a faultstateThe ionisation cur-rent lies outside thepermissible rangeduri

92Fault codeon the dis-playSystem characteris-ticsCause MeasuresF9 Burner in a faultstateFan speed too lowduring the burnerstartCheck the fan, check t

93Putting control unit in maintenance positionIf required for commissioning and serv-icing, the control unit can be put in a dif-ferent position.4.3.1

94Draining the boiler on the heating water side1. Close the shut-off valves on the heat-ing water side.2. Route hose at drain valve A into asuitable

95Checking the outside temperature sensorX310010-20 -10 0 10 20 30Temperature in °C6820406080200Resistance in kΩ1. Pull plug "X3" from the

96Checking the boiler temperature sensor, cylinder temperaturesensor or flow temperature sensor for the low loss headerX35TroubleshootingRepairs (cont

971. Boiler water temperature sensorPull the leads from boiler watertemperature sensor A and checkthe resistance. Cylinder temperature sensorPull

98B% &aVGA1. Cylinder temperature sensorRemove plug % from solar controlmodule A and measure the resist-ance. Collector temperature sensorRemo

99Checking the outlet temperature sensor1. Pull the leads from outlet temperaturesensor A.10110 30 50 70 90 110Temperature in °C0.40.60.8246820Resist