Viessmann FB2A Installation And Service Instructions For Contractors
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Viessmann FB2A Installation And Service Instructions For Contractors

Compact energy tower with a gas condensing boiler, 4.8 to 26 kw natural gas and lpg version, g.c. no: 47-819-18/47-819-19 19 kw/26kw
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VIESMANN
Installation and service
instructions
for contractors
Vitodens 242-F
Type FB2A
Compact Energy Tower with a gas condensing boiler
4.8 to 26 kW natural gas and LPG version
G.C. no: 47-819-18 (19 kW)
G.C. no: 47-819-19 (26kW)
For applicability, see the last page
VITODENS 242-F
Please keep safe.
5418 193 GB
6/2009

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  • Page 1 VIESMANN Installation and service instructions for contractors Vitodens 242-F Type FB2A Compact Energy Tower with a gas condensing boiler 4.8 to 26 kW natural gas and LPG version G.C. no: 47-819-18 (19 kW) G.C. no: 47-819-19 (26kW) For applicability, see the last page VITODENS 242-F Please keep safe.
  • Page 2 Safety instructions Safety instructions Please follow these safety instructions closely to prevent accidents and mate- rial losses. Safety instructions explained ■ all current safety regulations as defined by DIN, EN, DVGW, TRGI, Danger TRF, VDE and all locally applicable This symbol warns against the standards, risk of injury.
  • Page 3 ■ When using gas as fuel, also close the For replacements, use only orig- main gas shut-off valve and safeguard inal spare parts from Viessmann against unauthorised reopening. or those which are approved by ■ Isolate the system from the power sup- Viessmann.

  • Page 4: Table Of Contents

    Index Index Installation instructions Preparing for installation Product information....................Preparing for installation..................Installation sequence Installing the boiler....................10 Opening the control unit casing................15 Electrical connections................... 16 Closing the control unit casing................20 Service instructions Commissioning, inspection, maintenance Steps - commissioning, inspection and maintenance.......... 22 Further details regarding the individual steps............
  • Page 5 Index Index (cont.) Function description Internal extensions....................108 External extensions (accessories)................ 110 Control functions....................112 Remote control DIP switches................118 Electronic combustion controller................119 Designs Internal connection diagram................. 121 External connection diagram................122 Connection diagram solar control module............124 Parts lists......................125 Commissioning/service reports................

  • Page 6: Installation Instructions

    Preparing for installation Product information Vitodens 242-F, FB2A Set up for operation with natural gas H. For conversion to LPG P (without conversion kit), see page 30. The Vitodens 242-F should generally only be delivered to those countries specified on the type plate. For deliveries to alternative countries, an approved contractor, on his own initiative, must arrange individual approval in accordance with the law of the land.
  • Page 7 Preparing for installation Preparing for installation (cont.) A Solar return R ¾" B Heating flow R ¾" C DHW R ½" D Gas connection R ½" E DHW circulation R ½" (separate accessory) F Cold water R ½" G Heating return R ¾" H Solar flow R ¾"...
  • Page 8 Preparing for installation Preparing for installation (cont.) Note The adjustable feet give all height meas- urements a tolerance of +15 mm. 1. Prepare the heating water connec- tions. Flush the heating system thor- oughly. Note Should an additional diaphragm expansion vessel be required on site, connect that vessel into the heating return.
  • Page 9 Preparing for installation Preparing for installation (cont.) 4. 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 3 x 1.5 mm , fuse max. 16 A, 230 V/50 Hz.

  • Page 10: Installation Sequence

    Installation sequence Installing the boiler Assembling the boiler...
  • Page 11 Installation sequence Installing the boiler (cont.) Connections on the heating water and the DHW side Shown with connection sets for finished walls (accessories) A Heating flow R ¾" D Cold water R ½" B DHW R ½" E Heating return R ¾" C DHW circulation R ½"...
  • Page 12 Installation sequence Installing the boiler (cont.) DHW circulation connection DHW circulation connection with DHW circulation pump connection set (accessory) Separate installation instructions Connections on the solar side Shown with connection sets for finished walls (accessories) A Solar return R ¾" B Solar flow R ¾"...
  • Page 13 Installation sequence Installing the boiler (cont.) Separate installation instructions Note Route the blow-off pipe for the safety valve on the solar side into a suitable and adequately sized drip container. Set the safety valve on the solar side and the pressure gauge for the solar circuit on site.
  • Page 14 Installation sequence Installing the boiler (cont.) Note 3. Vent the gas line. For the tightness test, use only suita- ble and approved leak detecting For conversion to a different gas type agents (EN 14291) and devices. see page 30 Leak detecting agents with unsuita- ble contents (e.g.

  • Page 15: Opening The Control Unit Casing

    Installation sequence Opening the control unit casing...

  • Page 16: Electrical Connections

    Installation sequence Electrical connections Information regarding the connection of accessories For the connection, observe the separate installation instructions provided with the accessory components. Please note Electronic modules can be damaged by electrostatic discharges. Before beginning work, touch earthed objects, such as heating or water pipes, to discharge static loads.
  • Page 17 Installation sequence Electrical connections (cont.) Danger Low voltage plug X3 Incorrect core termination ! Outside temperature sensor (only can cause severe injuries for weather-compensated control and damage to the equip- units) ment. Take care not to interchange Installation: cores "L1" and "N". ■...
  • Page 18 Installation sequence Electrical connections (cont.) Connecting the collector temperature sensor Note Solar control module A is attached to the l.h. side of the air box. Connect collector temperature sensor & & to terminal box B of the prewired lead connected to solar control module On-site extension cable: 2-core, cross- section 1.5 mm % Cylinder temperature sensor (fitted...
  • Page 19 Installation sequence Electrical connections (cont.) Routing the connecting cables Please note Connecting cables will be damaged if they touch hot parts. When routing and securing power cables on site, ensure that the maximum permissible temperatures for these cables are not exceeded. A Low voltage connections E Communication module (accesso- B 230 V connections...

  • Page 20: Closing The Control Unit Casing

    Installation sequence Closing the control unit casing Close control unit casing and insert pro- Note gramming unit, packed separately. The programming unit can also be used in a wall mounting base (accessory) near the boiler.
  • Page 21 Installation sequence Closing the control unit casing (cont.) Wall mounting base installation instructions...

  • Page 22: Commissioning, Inspection, Maintenance

    Commissioning, inspection, maintenance Steps - commissioning, inspection and maintenance For further information regarding the individual steps, see the page indicated Commissioning steps Inspection steps Maintenance steps Page • • 1. Removing the front panels..........24 • 2. Filling the heating system..........24 •...
  • Page 23 Commissioning, inspection, maintenance Steps - commissioning, inspection and… (cont.) Commissioning steps Inspection steps Maintenance steps Page • 23. Checking the neutralising system (if installed) • 24. Checking the anode connection........40 • 25. Testing the anode earth current with an anode tester 40 •...

  • Page 24: Further Details Regarding The Individual Steps

    Commissioning, inspection, maintenance Further details regarding the individual steps Removing the front panels See page 10, steps 1 to 5. Filling the heating system Please note Unsuitable fill water increases the level of deposits and corrosion and may lead to boiler damage. ■...

  • Page 25: Changing The Language (If Required)

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Note 4. If the control unit had already been If the control unit has not been switched ON before filling began: switched ON prior to filling the sys- Switch control unit ON and activate tem, then the servomotor of the filling program (see next steps).

  • Page 26: Setting The Time And Date (If Required)

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Setting the time and date (if required) During commissioning, or after pro- 2. "Settings" longed time out of use, the time and date need to be reset. 3. "Time / Date" Extended menu: 4.

  • Page 27: Filling Siphon With Water

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Note 2. "Service functions" For function and sequence of the venting program, see page 113. 3. "Air vent valve" 3. Check the system pressure. 4. Ending venting function: Press OK or Activating the venting function: 1.

  • Page 28: Filling The Solar Circuit

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Filling the solar circuit Solar thermal system installation and service instructions 2. Fill the solar circuit via fill valve A with "Tyfocor LS". Minimum system pressure: 1.7 bar. Permiss. operating pressure: 6 bar. Please note To prevent equipment dam- age, use only "Tyfocor LS".

  • Page 29: Checking The Gas Type

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Enter names for heating circuits: Operating instructions Checking the gas type The boiler is equipped with an electronic combustion control unit that adjusts the burner for optimum combustion in accordance with the prevailing gas quality. ■...

  • Page 30: Gas Type Conversion (Only For Operation With Lpg)

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Gas type conversion (only for operation with LPG) 1. Set adjusting screw A at the gas train to "2". 2. Switch ON/OFF switch 3. Select the gas type in coding address "82": ■...
  • Page 31 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Ignition Fault F4 Check the ignition module (control voltage 230 V across plugs "X2.1" and "X2.2") Gas train opens Fault F4 Check the gas train (control voltage 230 V); check the gas supply pres- sure Ionisation current...

  • Page 32: Checking The Static And Supply Pressure

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Automatic calibra- Fault Eb Check the con- tion of the com- necting cable and bustion control the ionisation elec- unit trode, check the flue gas system (flue gas recirculation) For further details regarding faults, see page 85.

  • Page 33: Setting The Maximum Output

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 5. Start the boiler. 7. Record the actual value in the service report on page 135. Note Take the action shown in the follow- During commissioning, the boiler can ing table. enter a fault state because of airlocks in the gas line.

  • Page 34: Checking The Balanced Flue System Tightness (Annular Gap Check)

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 4. "Change?" Select "Yes". 5. Set the required value. A value flashes on the display (e.g. "85"). In the delivered condition, this value represents 100 % of rated out- put. Checking the balanced flue system tightness (annular gap check) We recommend that your heating engi-...

  • Page 35: Burner Removal

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Burner removal 1. Switch ON/OFF switch 2. Close the gas shut-off valve and safe- at the con- guard against reopening. trol unit and the main power supply OFF.

  • Page 36: Checking The Burner Gasket And The Burner Gauze Assembly

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 5. Release four nuts G and remove the 3. Pull electrical cables from fan motor A, gas valve B, ionisation elec- burner. trode C, ignition unit D and earth tab E. Please note Prevent damage to the wire gauze.

  • Page 37: Checking And Adjusting The Ignition And Ionisation Electrodes

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 1. Remove electrodes B. 4. Insert and secure a new burner gauze assembly E with a new gas- 2. Undo three retaining clips C at ther- ket F. mal insulation ring D and remove Torque: 3.5 Nm.
  • Page 38 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 3. Thoroughly flush the heat exchanger A with water. 4. Install the burner. Fit the screw with a serrated washer and the remaining screws, then tighten diagonally with 4 Nm torque. 5.

  • Page 39: Checking The Condensate Drain And Cleaning The Siphon

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Checking the condensate drain and cleaning the siphon 1. Check that the condensate can drain freely at the siphon. 2. Pull retaining clip A off. 3. Pull filler pipe B upwards. 4.

  • Page 40: Checking The Anode Connection

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Checking the anode connection Check that the earth lead is connected to the magnesium anode. A Magnesium anode B Earth cable Testing the anode earth current with an anode tester Note We recommend that the magnesium anode function is checked annually.
  • Page 41 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 1. Remove cover A. 3. Connect the tester (up to 5 mA) in series between tab C and earth 2. Pull earth lead B from tab C. cable B. ■ The anode is OK if the indicated current is >...

  • Page 42: Draining The Boiler On The Dhw Side

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Draining the boiler on the DHW side 1. Connect hose to drain valve and route into a suitable container or drain outlet. Note Ensure adequate ventilation in the DHW pipework. 2.

  • Page 43: Cleaning The Primary Cylinder

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Cleaning the primary cylinder Note EN 806 specifies a visual inspection and (if required) cleaning every two years after the cylinder has been taken into use and thereafter according to requirements. 5.

  • Page 44: Checking And Replacing The Magnesium Anode (If Required)

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 7. Remove loose deposits with a high 9. Thoroughly flush the primary cylinder pressure cleaner. after cleaning. Please note When cleaning the inside, only use plastic cleaning uten- sils. 8. Use a chemical cleaning agent to remove hard deposits that cannot be removed by a high pressure cleaner.

  • Page 45: Returning The Primary Cylinder Into Use

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Returning the primary cylinder into use 1. Reconnect the primary cylinder to the 4. Push earth cable C onto the tab. pipework. 5. Fit T&P valve E. 2. Insert new gasket A underneath flange lid B.

  • Page 46: Checking The Diaphragm Expansion Vessel And System Pressure

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Checking the diaphragm expansion vessel and system pressure Note Carry out this test on a cold system. 1. Drain the system, until the pressure gauge indicates "0". 2. If the diaphragm expansion vessel inlet pressure is lower than the static system pressure: Top up with nitro- gen via connection A, until the inlet...

  • Page 47: Checking The Combustion Quality

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Checking the combustion quality The electronic combustion control unit automatically ensures an optimum combustion quality. Only the combustion values need to be checked during commissioning and maintenance. For this, check the CO or O content.

  • Page 48: Matching The Control Unit To The Heating System

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 7. Check the CO content. Should the 2. "Actuator test" actual value deviate from the above 3. Select the lower output: ranges by more than 1%, implement Select "Base load" "ON" and con- steps from page 47.
  • Page 49 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) System version 1 One heating circuit without mixer A1 1 Vitodens 242-F wP Solar collectors 2 Outside temperature sensor wQ Collector temperature sensor 3 Heating circuit without mixer A1 Required code Operation with LPG 82:1...
  • Page 50 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) System version 2 One heating circuit with mixer M2 and a low loss header 1 Vitodens 242-F 7 Extension kit for one heating circuit with mixer M2 2 Outside temperature sensor 8 Low loss header 3 Heating circuit with mixer M2 9 Flow temperature sensor, low loss...
  • Page 51 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) System version 3 One heating circuit without mixer A1 and one heating circuit with mixer M2 1 Vitodens 242-F 6 Flow temperature sensor M2 2 Outside temperature sensor 7 Heating circuit pump M2 3 Heating circuit without mixer A1 8 Extension kit for one heating circuit with mixer M2...
  • Page 52 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) System version 4 One heating circuit without mixer A1, one heating circuit with mixer M2 and system separation 1 Vitodens 242-F 8 Extension kit for one heating circuit with mixer M2 2 Outside temperature sensor 9 Heat exchanger for system separa- 3 Heating circuit without mixer A1...
  • Page 53 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) System version 5 One heating circuit with mixer M1 (with Vitotronic 200-H), one heating circuit with mixer M2 (with extension kit) and low loss header (with/without DHW heat- ing) 1 Vitodens 242-F 9 Flow temperature sensor M2 2 Outside temperature sensor qP Heating circuit pump M2...

  • Page 54: Adjusting The Heating Curves

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Adjusting the heating curves The heating curves illustrate the relation- The room temperature, again, depends ship between the outside temperature on the boiler water or the flow tempera- and the boiler water or flow tempera- ture.
  • Page 55 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Changing the slope and level Adjusting the set room temperature Standard room temperature Outside temperature in °C Example 1: Adjustment of the standard A Changing the slope room temperature from 20 to 26°C B Changing the level (vertical parallel offset of the heating curve) A Boiler water temperature or flow...

  • Page 56: Connecting The Control Unit To The Lon

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) C Set room temperature in °C Reduced room temperature D Heating circuit pump "OFF" E Heating circuit pump "ON" Adjustment of the reduced room tem- perature: Operating instructions Example 2: Adjustment of the reduced room temperature from 5 °C to 14 °C A Boiler water temperature or flow temperature in °C...
  • Page 57 Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Boiler control unit Vitotronic 200-H Vitotronic 200-H Vitocom Subscriber no. 1 Subscriber no. 10 Subscriber no. 11 Subscriber no. Code "77:1" Code "77:10" Set code "77:11" Control unit is fault Control unit is not Control unit is not Device is fault...

  • Page 58: Scanning And Resetting The "Service" Display

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) 4. Select subscriber (e.g. subscriber Note 10). If the subscriber check is carried out The subscriber check for the selected by another control unit, the sub- subscriber is introduced. scriber number and "Wink" are ■...

  • Page 59: Fitting The Front Panels

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Fitting the front panels...

  • Page 60: Instructing The System User

    Commissioning, inspection, maintenance Further details regarding the individual steps (cont.) Instructing the system user The system installer must hand the oper- ating instructions to the system user and instruct him/her in the operation of the system.

  • Page 61: Calling Up Code 1

    Code 1 Calling up code 1 Note 2. "Coding level 1" ■ The codes are displayed as plain text. ■ Codes that have no function due to the 3. Select group of required coding heating system equipment level or the address: setting of other codes are not dis- ■...
  • Page 62 Code 1 General (cont.) Coding in the delivered condition Possible change Internal circulation pump function 51:0 Internal circulation pump 51:1 When there is a heat is always started when demand, the internal circu- there is a heat demand lation pump will only be started when the burner is operational.

  • Page 63: Boiler

    Code 1 General (cont.) Coding in the delivered condition Possible change Ext. Heating program changeover to heating circuit 91:0 No external heating pro- 91:1 The external heating pro- gram changeover via gram changeover affects external extension the heating circuit without mixer 91:2 The external heating pro-...
  • Page 64 Code 1 Boiler (cont.) Coding in the delivered condition Possible change Service status 24:0 No "Service" display 24:1 "Service" display (the address is automatically set and must be manually reset after a service has been carried out) Filling/venting 2F:0 Venting program/fill pro- 2F:1 Venting program enabled gram disabled...
  • Page 65 Code 1 Boiler (cont.) Coding in the delivered condition Possible change Ext. pump demand 34:0 Influence of the signal 34:1 Influence of the signal "External demand" on the "External demand" on the circulation pumps: All 34:23 circulation pumps: See the pumps in control function following table Value...

  • Page 66: Dhw

    Code 1 Coding Coding in the delivered condition Possible change Set DHW temperature with reheating suppression 67:40 Subject to the current out- 67:0 Function switched off put of the solar thermal 67:1 Start point adjustable from system, DHW heating is 1 to 95 °C started by the boiler 67:95...

  • Page 67: Heating Circuit 1/Heating Circuit 2

    Code 1 Solar (cont.) Coding in the delivered condition Possible change Flow rate 0F:70 The flow rate in the col- 0F:1 Flow rate in the collector lector circuit at the maxi- circuit adjustable from 0.1 mum pump speed is set 0F:255 to 25.5 l/min to 7 l/min.
  • Page 68 Code 1 Heating circuit 1/heating circuit 2 (cont.) Coding in the delivered condition Possible change Summer eco function absolute A6:36 Extended economy mode A6:5 Extended economy control disabled enabled, i.e. the burner and A6:35 heating circuit pump will be switched off and the mixer closed at a variable value, adjustable between 5 and 35 °C plus 1 °C.
  • Page 69 Code 1 Heating circuit 1/heating circuit 2 (cont.) Coding in the delivered condition Possible change Weather-compensated/ room temperature hook-up b0:0 With remote control: b0:1 Heating mode: weather- Heating mode/reduced compensated mode: (change code only Reduc. mode: with room for heating circuit with temperature hook-up mixer M2) b0:2...
  • Page 70 Code 1 Heating circuit 1/heating circuit 2 (cont.) Coding in the delivered condition Possible change Flow temperature maximum limit C6:74 Electronic maximum flow C6:10 Maximum limit adjustable temperature limit set to from 10 to 127 °C (limited 74 °C C6:127 by boiler-specific parame- ters) Heating program changeover...
  • Page 71 Code 1 Heating circuit 1/heating circuit 2 (cont.) Coding in the delivered condition Possible change Start temperature raising F8:-5 Temperature limit for ter- F8:+10 Temperature limit adjusta- minating the reduced ble from mode -5 ºC, see example F8:-60 +10 to -60 °C on page 116.

  • Page 72: Calling Up Coding Level 2

    Code 2 Calling up coding level 2 Note 3. "Coding level 2" ■ In coding level 2, all codes are acces- sible, including the codes from coding 4. Select group of required coding level 1. address: The following lists only those codes ■...
  • Page 73 Code 2 General (cont.) Coding in the delivered condition Possible change 6E:50 Never adjust 76:0 Without LON communi- 76:1 With LON communication cation module module (automatic recog- nition) 79:1 With LON communication 79:0 Control unit is not fault module: Control unit is manager fault manager 7b:1...

  • Page 74: Boiler

    97:2 The control unit sends the connected to the control outside temperature to the unit is utilised internally Vitotronic 200-H 98:1 Viessmann system num- 98:1 System number adjustable ber (in conjunction with from 1 to 5 monitoring several sys- 98:5...

  • Page 75: Dhw

    Code 2 Boiler (cont.) Coding in the delivered condition Possible change 28:0 No burner interval igni- 28:1 Time interval adjustable tion from 1 to 24 h. The burner 28:24 is force-started once every 30 s (only when operating with LPG). 2E:0 Without external exten- 2E:1...

  • Page 76: Solar

    Coding in the delivered condition Possible change 65:... Information regarding the type of diverter valve; do not adjust. ■ 65:0 No diverter valve ■ 65:1 Viessmann diverter valve ■ 65:2 Wilo diverter valve ■ 65:3 Grundfos diverter valve 6C:100 Set speed; internal pri-...
  • Page 77 Code 2 Solar (cont.) Coding in the delivered condition Possible change 01:4 The solar circuit pump is 01:1 The differential between stopped when the differ- the actual cylinder temper- ential between the collec- 01:29 ature and the stop point for tor temperature and the the solar circuit pump can actual cylinder tempera-...

  • Page 78: Heating Circuit 1/Heating Circuit 2

    Coding in the delivered condition Possible change 0b:0 Collector frost protection 0b:1 Collector frost protection function switched off function switched on (not required with Viessmann heat transfer medium). 0C:1 Delta T monitoring 0C:0 Delta T monitoring switched on. switched off.
  • Page 79 Code 2 Heating circuit 1/heating circuit 2 (cont.) Please note If a value is selected below 1 °C, there is a risk of pipes outside the thermal envelope of the building freezing up. The standby mode, in particular, should be taken into consideration, e.g. dur- ing holidays.
  • Page 80 Code 2 Heating circuit 1/heating circuit 2 (cont.) Coding in the delivered condition Possible change b2:8 With remote control and b2:0 Without room influence for the heating circuit, b2:1 Room influence factor operation with room tem- adjustable from 1 to 64 perature hook-up must be b2:64 programmed: Room influ-...

  • Page 81: Diagnosis And Service Scans

    Diagnosis and service scans Diagnosis Operating data can be scanned in the following areas: ■ General ■ Heating circuit 1 ■ Heating circuit 2 (if heating circuit with mixer installed) ■ DHW ■ Solar ■ Brief scan (for further information, see page 81) ■...
  • Page 82 Diagnosis and service scans Diagnosis (cont.) Diagnose Kurzabfrage Wählen mit For an explanation of the relevant values in the individual lines, see the fol- lowing table: Line (brief Field scan) Software version Equipment version Burner control unit ver- Control unit sion System designs 01 Number...

  • Page 83: Checking Outputs (Relay Test)

    Diagnosis and service scans Diagnosis (cont.) Line (brief Field scan) Boiler Heating circuit A1 Heating circuit with (without mixer) mixer M2 Remote Software Remote Software control version control version 0 w/o Remote 0 w/o Remote 1 Vitotrol control 1 Vitotrol control 0: no 0: no...
  • Page 84 Diagnosis and service scans Checking outputs (relay test) (cont.) Display Explanation Output internal ON Output sK Internal extension Heating circ pump A1 Connection to external extension H1 Cyl. prim. pump ON Connection to external extension H1 DHW circ pump ON Connection to external extension H1 Central fault ON Connection to external extension H1...

  • Page 85: Troubleshooting

    Troubleshooting Fault display If there is a fault, the red fault indicator Calling up acknowledged faults A flashes. " " flashes on the display and "Fault" is shown. Select "Fault" in the standard menu. The current faults will be displayed in a list.

  • Page 86: Fault Codes

    Troubleshooting Fault codes Fault code System characteris- Cause Measures on the dis- tics play Controls as if the out- Short circuit, out- Check the outside tem- side temperature side temperature perature sensor (see were 0 °C sensor page 95) Controls as if the out- Lead break, out- Check the outside tem- side temperature...
  • Page 87 Troubleshooting Fault codes (cont.) Fault code System characteris- Cause Measures on the dis- tics play No DHW heating Lead break, outlet Check sensors (see temperature sen- page 96) No DHW heating Short circuit, col- Check sensor & on the lector temperature solar control module.
  • Page 88 Troubleshooting Fault codes (cont.) Fault code System characteris- Cause Measures on the dis- tics play The burner operates Internal circulation Check the circulation at its lower output if a pump blocked pump heating circuit with mixer is connected. The burner is blocked if only one heating cir- cuit without mixer is connected.
  • Page 89 Troubleshooting Fault codes (cont.) Fault code System characteris- Cause Measures on the dis- tics play Control mode Vitotrol remote Check remote control DIP control incorrectly switch setting (see programmed page 118) Control mode Incorrect LON Replace the LON commu- communication nication module module Control mode...
  • Page 90 Troubleshooting Fault codes (cont.) Fault code System characteris- Cause Measures on the dis- tics play Control mode without Short circuit, room Check room temperature room influence temperature sen- sensor, heating circuit 2 sor, heating circuit 2 (with mixer) Control mode without Lead break, room Check room temperature room influence...
  • Page 91 Troubleshooting Fault codes (cont.) Fault code System characteris- Cause Measures on the dis- tics play Burner in a fault The ionisation cur- Check the ionisation elec- state rent lies outside the trode and cable. permissible range Press reset button R. during calibration Burner in a fault Internal fault...
  • Page 92 Troubleshooting Fault codes (cont.) Fault code System characteris- Cause Measures on the dis- tics play Burner in a fault Fan speed too low Check the fan, check the state during the burner fan connecting cables and start power supply; check the fan control.

  • Page 93: Repairs

    Troubleshooting Repairs Putting control unit in maintenance position If required for commissioning and serv- icing, the control unit can be put in a dif- ferent position.
  • Page 94 Troubleshooting Repairs (cont.) Draining the boiler on the heating water side 1. Close the shut-off valves on the heat- 3. Open drain valve A and drain the ing water side. boiler as much as required. 2. Route hose at drain valve A into a suitable container or drain outlet.
  • Page 95 Troubleshooting Repairs (cont.) Checking the outside temperature sensor 1. Pull plug "X3" from the control unit. 2. Test the resistance of the outside temperature sensor across terminals "X3.1" and "X3.2" on the disconnec- ted plug and compare it with the curve.
  • Page 96 Troubleshooting Repairs (cont.) Checking the boiler temperature sensor, cylinder temperature sensor or flow temperature sensor for the low loss header...
  • Page 97 Troubleshooting Repairs (cont.) 1. ■ Boiler water temperature sensor Pull the leads from boiler water temperature sensor A and check the resistance. ■ Cylinder temperature sensor Pull plug % from the cable har- ness at the control unit and check the resistance.
  • Page 98 Troubleshooting Repairs (cont.) 1. ■ Cylinder temperature sensor & Remove plug % from solar control module A and measure the resist- ance. ■ Collector temperature sensor Remove plug & from solar control module A and or disconnect lead from terminal box B and measure the resistance.
  • Page 99 Troubleshooting Repairs (cont.) Checking the outlet temperature sensor 1. Pull the leads from outlet temperature sensor A. 2. Check the sensor resistance and compare it with the curve. 3. Replace the sensor in case of severe deviation. Danger The outlet temperature sen- sor is immersed in the DHW (risk of scalding).
  • Page 100 Troubleshooting Repairs (cont.) Check the flue gas temperature sensor The flue gas temperature sensor locks out the boiler when the permissible flue gas temperature is exceeded. Reset the interlock after the flue system has cooled down by pressing reset button R. 1.
  • Page 101 Troubleshooting Repairs (cont.) Checking the plate heat exchanger Note Drain the boiler on its heating water and DHW side. During removal, small amounts of water may trickle out and escape from the removed plate heat exchanger. 1. Shut off and drain the boiler on its 5.
  • Page 102 Troubleshooting Repairs (cont.) 1. Pull the leads from temperature lim- iter A. 2. Check the continuity of the tempera- ture limiter with a multimeter. 3. Remove the faulty temperature lim- iter. 4. Coat the replacement temperature limiter with heat conducting paste and install it.
  • Page 103 Troubleshooting Repairs (cont.) Checking the fuse 1. Switch OFF the power. 3. Remove cover A. 2. Release the side closures and pivot 4. Check fuse F1 (see connection and the control unit down. wiring diagram).
  • Page 104 Troubleshooting Repairs (cont.) Checking the solar control module fuse 2. Check fuse A in the solar control 1. Switch OFF the power. module (see connection and wiring diagram). Extension kit for heating circuit with mixer Note Note the rotational direction of the mixer The DIP switch on the PCB of the exten- motor during its self-test.
  • Page 105 Troubleshooting Repairs (cont.) In the delivered condition, the mixer For the following mixer arrangement motor is set up for the following mixer (heating return from the right), change arrangement (heating return from the the rotational direction. left). Changing the rotational direction of the mixer motor (if required) Danger An electric shock can be life-threatening.

  • Page 106: Function Description

    Function description (cont.) Boiler temperature 48°C Heating Solar energy Information Select with Heating operation The control unit determines a set boiler The electronic temperature limiter inside water temperature subject to outside the burner control unit limits the boiler temperature or room temperature (if a water temperature to 82 °C.
  • Page 107 Function description (cont.) The primary cylinder is heated up to the After heating, the cylinder primary pump set DHW temperature. Heating stops and the three-way diverter valve remain when the set temperatures have been ON for a further 30 s. reached at the cylinder temperature sen- sor and at the outlet temperature sen- sor.

  • Page 108: Internal Extensions

    Function description Internal extensions Internal extension H1 The internal extension H1 is integrated An external safety valve can be connec- into the control unit casing. The cylinder ted to gD. primary pump is connected to relay out- put sK.
  • Page 109 Function description Internal extensions (cont.) Internal extension H2 (accessories) The internal extension H2 is integrated An external extractor interlock can be into the control unit casing instead of the connected to aBJ. internal extension H1. The cylinder pri- mary pump is connected to relay output...

  • Page 110: External Extensions (Accessories)

    Function description External extensions (accessories) External extension H1 The external extension is connected to aVD ■ External blocking the boiler control unit via the KM BUS. (terminals 2 - 3) The following functions can be controlled ■ External demand or processed simultaneously via the (terminals 1 - 2) extension: ■...
  • Page 111 Function description External extensions (accessories) (cont.) External extension H2 The external extension is connected to aVD ■ External blocking the boiler control unit via the KM BUS. (terminals 2 - 3) The following functions can be controlled ■ External demand or processed simultaneously via the (terminals 1 - 2) extension:...

  • Page 112: Control Functions

    Function description Control functions External heating program changeover The "External heating program change- over" function is connected via external extension input "aVD". You can select which heating circuits the heating pro- gram changeover affects in coding address "91": Heating program changeover Coding No changeover 91:0...
  • Page 113 Function description Control functions (cont.) External blocking The "External blocking" function is con- In coding address "32" you can select the nected via external extension input influence the "Ext. blocking" signal "aVD". should have on the connected circulation pumps. External demand The "External demand"...
  • Page 114 Function description Control functions (cont.) Screed drying function The screed function enables screeds to ■ Heat-up data with respective flow tem- be dried. For this, always observe the peratures details specified by the screed manufac- ■ Max. flow temperature achieved turer.
  • Page 115 Function description Control functions (cont.) Temperature profile 3: Code "F1:3" Days Temperature profile 4: Code "F1:4" Days Temperature profile 5: Code "F1:5" Days...
  • Page 116 Function description Control functions (cont.) Temperature profile 6: Code "F1:6" Days Temperature profile 7: Code "F1:15" Days Raising the reduced room temperature During operation with reduced room The outside temperature limits for the temperature, the reduced set room tem- start and end of the temperature raising perature can be automatically raised can be adjusted via coding addresses subject to the outside temperature.
  • Page 117 Function description Control functions (cont.) Example using the settings in the delivered condition -5 -10 -15 Outside temp. in °C A Heating curve for operation with B Heating curve for operation with standard room temperature reduced room temperature Reducing the heat-up time During the transition from operation with The value and duration of the additional reduced room temperature to operation...

  • Page 118: Remote Control Dip Switches

    Function description Control functions (cont.) Example using the settings in the delivered condition Time in h A Start of operation with standard D Duration of operation with raised set room temperature boiler water or flow temperature in B Set boiler water or flow temperature accordance with coding address in accordance with the selected "Fb":...

  • Page 119: Electronic Combustion Controller

    Function description Remote control DIP switches (cont.) Remote control DIP switch setting The remote control affects the heating cir- cuit without mixer A1 1 2 3 4 The remote control affects the heating cir- cuit with mixer M2 1 2 3 4 When connecting a separate room tem- perature sensor, set DIP switch "3"...
  • Page 120 Function description Electronic combustion controller (cont.) Air factor λ – CO content Air factor content content (%) content (%) content λ for natural gas for natural gas (%) for LPG P 1.24 10.9 1.27 10.6 1.30 10.3 1.34 10.0 1.37 1.40 1.44 To achieve an optimum combustion con-...

  • Page 121: Designs

    Designs Internal connection diagram Main PCB dÖ Stepper motor for diverter valve X... Electrical interfaces Thermal circuit breaker § Boiler water temperature sensor Ignition unit Outlet temperature sensor a-Ö Fan motor Ionisation electrode a-ÖA Fan motor control Flue gas temperature sensor a:Ö...

  • Page 122: External Connection Diagram

    Designs External connection diagram Main PCB Burner control unit Power supply unit Programming unit Optolink Coding card...
  • Page 123 Designs External connection diagram (cont.) Connection adaptor Cylinder temperature sensor LON communication module (plug on the cable harness) sÖ Internal extension H1 Internal circulation pump ON/OFF switch Gas solenoid valve Reset button fÖ Power supply X... Electrical interfaces Power supply accessories and KM BUS to the solar control mod- Vitotrol 100 a-Ö...

  • Page 124: Connection Diagram Solar Control Module

    Designs Connection diagram solar control module Main PCB & Collector temperature sensor X... Electrical interfaces Solar circuit pump KM BUS from the control unit fÖ Power supply Power supply from the control unit aVG KM BUS Cylinder temperature sensor...

  • Page 125: Parts Lists

    Parts lists Parts lists Spare parts information 035 Connection pipework, heating Quote the part and serial no. (see type water return plate) and the item number of the 036 Connection pipework, cold water required part (as per this parts list). 037 DHW connection pipe Obtain standard parts from your local 038 Heating water flow connection pipe...
  • Page 126 Parts lists Parts lists (cont.) 082 Gasket set A 10 x 15 x 1.5 164 Cylinder gasket 084 Gasket 23 x 30 x 2.0 166 Anode flange with gasket 085 O-ring gasket set 17.86 x 2.62 167 Flange insulation 086 O-ring 9.6 x 2.4 171 Sleeve 087 O-ring 14.3 x 2.4 172 Lid...
  • Page 127 Parts lists Parts lists (cont.) 310 Cable harness X8/X9/Ionisation 320 Plug set, LV 311 Cable harness 100/35/54 (auxiliary 321 Plug set, 230 V earth) 401 Operating instructions for weather- 312 Cable harness stepper motor compensated mode 313 Mating plug set 402 Installation and service instructions 314 Cable fixing A Type plate...
  • Page 128 Parts lists Parts lists (cont.)
  • Page 129 Parts lists Parts lists (cont.)
  • Page 130 Parts lists Parts lists (cont.)
  • Page 131 Parts lists Parts lists (cont.)
  • Page 132 Parts lists Parts lists (cont.)
  • Page 133 Parts lists Parts lists (cont.)
  • Page 134 Parts lists Parts lists (cont.) 084 174 084...

  • Page 135: Commissioning/Service Reports

    Commissioning/service reports Commissioning/service reports Setting and test val- Set value Commis- Service sioning Date: Static pressure mbar max. 57.5 mbar Supply pressure (flow pressure) = for natural gas E mbar 17.4-25 mbar = for natural gas LL mbar 17.4-25 mbar = for LPG mbar 42.5-57.5 mbar...

  • Page 136: Specification

    Specification Specification Rated voltage 230 V Electronic tempera- Rated frequency 50 Hz ture limiter setting 82 °C Rated current Temperature limiter Protection class setting 100 °C (fixed) Protection IP X 4 D to Line fuse (mains) max. 16 A– EN 60529 Permissible ambient temperature ■...

  • Page 137: Certificates

    Certificates Declaration of conformity Declaration of conformity for the Vitodens 242-F We, Viessmann Werke GmbH&Co KG, D-35107 Allendorf, confirm as sole respon- sible body that the product Vitodens 242-F complies with the following standards: DIN 4702–6 EN 55 014 DIN 4753...

  • Page 138: Manufacturer's Certificate According To The 1St Bimschv [Germany]

    Certificates Manufacturer's certificate according to the 1st BImSchV [Germany] We, Viessmann Werke GmbH&Co KG, D-35107 Allendorf, confirm that the product Vitodens 242-F complies with the NO limits specified by the 1st BImSchV para- graph 7 (2) [Germany]. Allendorf, 1 May 2009 Viessmann Werke GmbH &...

  • Page 139: Keyword Index

    Keyword index Keyword index Extension kit for heating circuit with Acknowledging a fault display....85 mixer ..........104 External blocking......113 External demand......113 Boiler temperature sensor....96 Brief scans.........81 Burner gasket........36 Fault codes........86 Burner gauze assembly.....36 Fault history........85 Burner removal........35 Fault manager........57 Fault memory........85 Faults..........85 Calling up fault messages....85 Fill function........113...
  • Page 140 Keyword index Keyword index (cont.) Resetting codes......61, 72 LON............56 Room temperature adjustment..55 ■ Fault monitoring......57 Rotational direction of mixer motor ■ Setting subscriber numbers....56 ■ Changing........105 LON communication module....56 ■ Checking........104 LON subscriber check......57 Safety chain ........101 Magnesium anode Scanning operating conditions...81 ■...
  • Page 144 Type FB2A from serial no. 4.8 to 19 kW 7423 015 ... 6.5 to 26 kW 7374 980 ... Viessmann Werke GmbH&Co KG Viessmann Limited D-35107 Allendorf Hortonwood 30, Telford Telephone: +49 6452 70-0 Shropshire, TF1 7YP, GB Fax: +49 6452 70-2780 Telephone: +44 1952 675000 www.viessmann.com...

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Vitodens 242-f

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