Viessmann VITODENS 222-F Installation And Service Instructions Manual
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Viessmann VITODENS 222-F Installation And Service Instructions Manual

Gas condensing storage combi boiler
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VIESMANN
Installation and service instructions
for contractors
Vitodens 222-F
Type B2TE, 1.9 to 32 kW
Gas condensing storage combi boiler
Natural gas and LPG version
VITODENS 222-F
Please keep safe.
6130884 GB
6/2019

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  • Page 1 VIESMANN Installation and service instructions for contractors Vitodens 222-F Type B2TE, 1.9 to 32 kW Gas condensing storage combi boiler Natural gas and LPG version VITODENS 222-F Please keep safe. 6130884 GB 6/2019...
  • Page 2 Never touch hot surfaces on the boiler, burner, lidate our warranty. ■ flue system or pipework. For replacements, use only original spare parts supplied or approved by Viessmann. Please note Electronic assemblies can be damaged by elec- trostatic discharge. Prior to commencing work, touch earthed objects such as heating or water pipes to dis- charge static loads.
  • Page 3 Safety instructions Safety instructions (cont.) Safety instructions for operating the system If you smell gas Flue systems and combustion air Danger Ensure that flue systems are clear and cannot be Escaping gas can lead to explosions which may sealed, for instance due to accumulation of conden- result in serious injury.

  • Page 4: Table Of Contents

    Index Index 1. Information Disposal of packaging ................Symbols ....................Intended use ..................Product information ................Vitodens 222-F, type B2TE ..............■ System examples .................. Spare parts lists ..................2. Preparing for installation Handling ....................Siting in recesses ................... Relocating the ON/OFF switch and electrical connections (if neces- ■...
  • Page 5 Index Index (cont.) Fault messages ..................73 Repairs ....................89 Shutting down the boiler ..............89 ■ Draining the boiler on the heating water side ........90 ■ Checking the temperature sensors ............. 91 ■ Information on replacing the HMU heat management unit and BCU ■...

  • Page 6: Disposal Of Packaging

    Information Disposal of packaging Please dispose of packaging waste in line with statu- tory regulations. Symbols The steps in connection with commissioning, inspec- Symbol Meaning tion and maintenance are found in the "Commission- Reference to other document containing ing, inspection and maintenance" section and identified further information as follows: Step in a diagram:...

  • Page 7: Product Information

    ■ Weather-compensated control unit The Vitodens 222-F may only be delivered to the coun- ■ Diaphragm expansion vessel (18 l capacity) tries specified on the type plate. For deliveries to other...

  • Page 8: Handling

    Preparing for installation Handling Please note Prevent damage to the appliance during han- dling. Never set the appliance down on its front or sides, or apply any load to these surfaces. If possible, leave the boiler on the pallet during handling.

  • Page 9: Preparing For Boiler Installation

    Preparing for installation Siting in recesses (cont.) Open the electrical wiring chamber of the HMU. Dis- 4. Release plug of electrical connections by turning it connect the cable of the ON/OFF switch and remove. a quarter turn. See electrical connections. 5.
  • Page 10 Preparing for installation Preparing for boiler installation (cont.) Ø 100 Ø 60 Fig. 2 Heating flow R Condensate drain to the side ¾ DHW R Area for electrical cables (on-site junction box) ½ Gas connection R ¾ Cold water R Note ½...
  • Page 11 Preparing for installation Preparing for boiler installation (cont.) 1. Prepare the connections on the heating water side. Thoroughly flush the heating system. Note Should an additional expansion vessel be required on site, connect this vessel in the heating return. 2. Prepare the connections on the DHW side. Install the safety assembly (accessories or on-site provi- sion) in accordance with EN 806 [or local regula- tions] in the cold water supply.

  • Page 12: Safety Assembly To Din 1988 And En 806

    Preparing for installation Preparing for boiler installation (cont.) 4. Prepare gas connection to TRGI [or local regula- tions]. 5. Prepare the electrical connections. ■ The appliance is delivered fitted with a power cable (approx. 1.5 m long). Power supply: 230 V, 50 Hz, fuse rating ■...

  • Page 13: Siting The Boiler

    Installation sequence Siting the boiler Fig. 5 Type plate Note 2. In consultation with the system user, affix the addi- The type plate is attached to cover panel in the tional type plate to the outside of the appliance. appliance. See page 35. The additional type plate must be visible to the flue gas inspector.

  • Page 14: Removing The Front Panel

    Installation sequence Removing the front panel Fig. 6 Connections on the heating water and DHW sides Fig. 7 Shown with connection sets for surface mounting (accessories) Heating flow R Cold water R ¾ ½ DHW R Heating return R ½ ¾...

  • Page 15: Dhw Circulation Connection (Potable Water)

    The "System certification" and "Skoberne GmbH flue Flue system installation instructions system" labels enclosed with the technical documenta- tion may only be used in conjunction with the Viessmann flue system made by Skoberne. Do not carry out commissioning until the following Danger conditions are met: Leaking or blocked flue systems or an insuffi- Free passage through the flue gas pipes.

  • Page 16: Gas Connection

    Installation sequence Gas connection Fig. 9 1. If the gas connection has not been fitted previ- 3. Purge the gas line. ously, seal gas shut-off valve to the gas con- nection. When carrying out any work on gas connection fit- tings, counterhold with a suitable tool.

  • Page 17: Electrical Connections

    Installation sequence Electrical connections Opening the HMU wiring chamber Please note Electronic assemblies can be damaged by elec- trostatic discharge. Prior to commencing any work, touch earthed objects, such as heating or water pipes to dis- charge static loads. Fig. 10 Note For further information on the connections, see the fol- lowing chapters.

  • Page 18: On-Site Connections On Hmu Heat Management Unit

    Installation sequence Electrical connections (cont.) P2 230 V parametrisable output: PlusBus DHW circulation pump or heating circuit pump for Terminals 5 and 6 on external plug heating circuit without mixer (in systems with low CAN bus loss header) BCU burner control unit power supply (connected Information on connecting accessories in the delivered condition) When connecting accessories observe the sep-...

  • Page 19: Connecting The Circulation Pump To P2

    Installation sequence Electrical connections (cont.) Connecting the circulation pump to P2 Information on priority of connection options: If heating circuit pump for heating circuit without ■ mixer A1 is installed: Connect heating circuit pump to output P2. Then connect DHW circulation pump to an EM-P1 extension (accessories).

  • Page 20: Power Supply For Accessories At Plug

    Installation sequence Electrical connections (cont.) If the device is not integrated into a CAN bus sys- ■ tem: Switch must not be set to "ON". ■ If the device is integrated into a CAN bus system and is located at the beginning or end of this system (not in the middle) of the CAN bus system (connected to only one plug ): Set switch...
  • Page 21 Accessories Internal fuse protec- and bundle tightly to the corresponding termi- tion nals. EM-M1, EM-MX mixer exten- Secure cables with cable ties. ■ sion kit EM-EA1 extension EM-S1 extension (not for Vitodens 222-F, 222-W and 333-F)

  • Page 22: Power Supply Fö

    Installation sequence Electrical connections (cont.) Power supply fÖ Danger If the power supply to the appliance is connected ■ Incorrectly executed electrical installations can with a flexible cable, ensure that the live conductors result in injuries from electrical current and dam- are pulled taut before the earth conductor in the age to the appliance.

  • Page 23: Routing Connecting Cables/Leads

    Installation sequence Electrical connections (cont.) Angle of penetration Ideal angle of penetration The reception quality remains best if radio signals hit the walls vertically. Depending on the angle of penetration, the effective wall thickness changes and so does the extent to which the electromagnetic waves are damped.

  • Page 24: Closing The Wiring Chamber

    Installation sequence Closing the wiring chamber Fig. 22 Fitting the front panel and programming unit Fig. 23 Lightguide at the bottom...

  • Page 25: Steps - Commissioning, Inspection And Maintenance

    Commissioning, inspection, maintenance Steps - commissioning, inspection and maintenance Commissioning steps Inspection steps Maintenance steps Page • • 1. Removing the front panels....................27 • 2. Moving the programming unit to the maintenance position.......... 27 • 3. Commissioning the system....................27 •...
  • Page 26 Commissioning, inspection, maintenance Steps - commissioning, inspection and… (cont.) Commissioning steps Inspection steps Maintenance steps Page • 40. Calling up and resetting the service display..............53 • • • 41. Fitting the front panel......................54 • 42. Instructing the system user....................54...

  • Page 27: Removing The Front Panels

    Commissioning, inspection, maintenance Removing the front panels See page 14, steps 1 to 5 Moving the programming unit to the maintenance position To carry out various maintenance jobs, move the pro- gramming unit downwards. Fig. 24 Commissioning the system Commissioning assistant 1.
  • Page 28 Commissioning, inspection, maintenance Commissioning the system (cont.) Commissioning assistant Explanations and references sequence Commissioning Language By app The appliance automatically switches on the WiFi Access Point. Further commissioning steps according to the instructions of the software tool used (e.g. "ViStart app") Note Apps for commissioning and service are available for iOS and Android devi- ces.
  • Page 29 Commissioning, inspection, maintenance Commissioning the system (cont.) Commissioning assistant Explanations and references sequence Settings for DHW heating according to the system components Not installed System without DHW heating ■ Cylinder with one sensor System with DHW cylinder with 1 cylinder temperature sensor ■...
  • Page 30 Commissioning, inspection, maintenance Commissioning the system (cont.) Commissioning assistant Explanations and references sequence Plug 96 function Function selection if a contact has been connected to plug 96 of the HMU heat management unit No function ■ External demand, DHW Pushbutton function, DHW circulation pump runs for 5 min. ■...

  • Page 31: Filling The Heating System

    Commissioning, inspection, maintenance Filling the heating system Fill water According to EN 1717 with DIN 1988-100, as a heat Please note transfer medium for DHW heating, the heating water Unsuitable fill water increases the level of must meet fluid category ≤ 3. This requirement is met if deposits and corrosion and may lead to appli- water of potable quality is used as heating water.

  • Page 32: Venting The Boiler

    Commissioning, inspection, maintenance Filling the heating system (cont.) 3. Connect the fill hose to boiler drain & fill valve 7. Fill the heating system via boiler drain & fill valve in the heating flow. Either on the side or top of the .

  • Page 33: Venting The Heating System

    Commissioning, inspection, maintenance Venting the heating system Fig. 27 1. Check whether the air vent screw in quick-action 3. Activate venting function (see following steps). air vent valve of the heating circuit pump is open. 4. Call up the pressure display with "System over- view".

  • Page 34: Filling The Dhw Cylinder On The Dhw Side

    Commissioning, inspection, maintenance Filling the DHW cylinder on the DHW side 1. The lever on the valve must be in position 2. Open the on-site DHW supply and a DHW draw-off point. 3. Once air stops coming out of the DHW draw-off point, the DHW cylinder is completely filled.

  • Page 35: Converting The Gas Type (Only For Operation With Lpg)

    Commissioning, inspection, maintenance Converting the gas type (only for operation with LPG) 1. To change the gas type on the control unit, see 2. Affix label "G31" (supplied with the technical docu- "Commissioning the system with the commission- mentation) adjacent to the type plate on the out- ing assistant"...

  • Page 36: Function Sequence And Possible Faults

    Commissioning, inspection, maintenance Checking the static pressure and supply pressure (cont.) 08. Record the actual value in the report. 11. Open the gas shut-off valve and start the appli- Implement measures as indicated in the table ance. below. Danger 09. Shut down the boiler. Close the gas shut-off valve. Gas escaping from the test connector leads to a risk of explosion.

  • Page 37: Setting The Max. Heating Output

    Commissioning, inspection, maintenance Function sequence and possible faults (cont.) Ionisation current builds Fault F.369, F.380 Check distance of ionisation electrode on burner gauze assembly. Purge the gas line. Burner in operation Shuts down below the set Check the flue system for boiler water temperature and tightness (flue gas recircula- restarts immediately.

  • Page 38: Activating Screed Drying

    Commissioning, inspection, maintenance Activating screed drying Screed drying 6 different temperature profiles can be set for screed For further details, see “Function description”. drying: Preset temperature profiles can be set via parameter 897.0 "Screed drying" in the General group. Adjusting the pump rate of the integral circulation pump The pump speed and consequently the pump rate are ■...
  • Page 39 Commissioning, inspection, maintenance Adjusting the pump rate of the integral… (cont.) Curve Pump rate, circulation pump 10 % 20 % 30 % 40 % 50 % 60 % 70 % 80 % 90 % 100 % 32 kW 700 70 650 65 600 60 550 55...

  • Page 40: Checking The Balanced Flue System Tightness (Annular Gap Check)

    Commissioning, inspection, maintenance Adjusting the pump rate of the integral… (cont.) Curve Pump rate, circulation pump 10 % 20 % 30 % 40 % 50 % 60 % 70 % 80 % 90 % 100 % Checking the balanced flue system tightness (annular gap check) Fig.

  • Page 41: Removing The Burner

    Commissioning, inspection, maintenance Removing the burner Fig. 33 1. Turn off the ON/OFF switch. 5. Undo gas supply pipe fitting 2. Close the gas shut-off valve and safeguard against 6. Detach Venturi extension from fan unit. reopening. 7. Undo 4 screws and remove the burner.

  • Page 42: Checking The Burner Gasket And Burner Gauze Assembly

    Commissioning, inspection, maintenance Checking the burner gasket and burner gauze assembly Fig. 34 Check burner gauze assembly , electrodes 6. Insert thermal insulation ring and burner gauze gasket for damage. Only remove and replace com- assembly with gasket . Observe correct ponents if they are damaged or worn.

  • Page 43: Checking And Adjusting The Ignition And Ionisation Electrodes

    Commissioning, inspection, maintenance Checking and adjusting the ignition and ionisation electrodes ±0.5 Fig. 35 Ignition electrodes Ionisation electrode 1. Check the electrodes for wear and contamination. 3. Check the electrode gaps. If the gaps are not as specified or the electrodes are damaged, replace 2.
  • Page 44 Commissioning, inspection, maintenance Checking the condensate drain and cleaning the… (cont.) Fig. 37 1. Pivot the HMU heat management unit forwards. 8. Check that connections on the trap and the heat exchanger are seated correctly. 2. Remove the supply hose. Note 3.

  • Page 45: Installing The Burner

    Commissioning, inspection, maintenance Installing the burner Fig. 38 1. If necessary, move the programming unit. 6. Connect the cables/leads: ■ Fan motor 2. Insert the burner and tighten screws diagonally. Connect CAN bus fan to adaptor. Torque: 6.5 Nm ■ Ionisation electrode ■...

  • Page 46: Checking The Anode Connection And Anode Earth Current With An Anode Tester

    Commissioning, inspection, maintenance Checking the anode connection and anode earth current with an anode tester Check that the earth cable is connected to the protec- tive magnesium anode. Note We recommend checking the function of the protective magnesium anode annually. This function test can be carried out without interrupting operation, by measur- ing the earth current with an anode tester.

  • Page 47: Cleaning The Loading Cylinder

    Commissioning, inspection, maintenance Draining the boiler on the DHW side (cont.) 2. Connect the hose to the drain valve and route it into a suitable container or drain outlet. Note Ensure adequate ventilation in the DHW pipework. 3. Turn the drain valve from lever position (opera- tional) to lever position as required.

  • Page 48: Checking And Replacing The Protective Magnesium Anode (If Required)

    Commissioning, inspection, maintenance Cleaning the loading cylinder (cont.) Fig. 41 1. Drain the loading cylinder. 5. Thoroughly flush the loading cylinder after clean- ing. 2. Remove flange cover 3. Disconnect the loading cylinder from the pipework to prevent contamination from entering the pipe- work.

  • Page 49: Re-Assembling And Filling The Loading Cylinder

    Commissioning, inspection, maintenance Re-assembling and filling the loading cylinder Fig. 42 1. Reconnect the loading cylinder to the pipework. 4. Push earth cable onto the tab. 2. Insert new gasket underneath flange cover 5. Fit cover (two-part design up to 26 kW). 3.

  • Page 50: Checking The Diaphragm Expansion Vessel And System Pressure

    Commissioning, inspection, maintenance Checking the diaphragm expansion vessel and system pressure Fig. 43 Note 3. Top up with water until the charge pressure of the Carry out this test on a cold system. cooled system is 0.1 to 0.2 bar (10 to 20 kPa) higher than the pre-charge pressure of the expan- 1.

  • Page 51: Checking The Pre-Charge Pressure And The Dhw Expansion Vessel (If Installed)

    Commissioning, inspection, maintenance Checking the pre-charge pressure and the DHW expansion vessel (if instal- led) 1. Check the static pressure of the DHW line down- stream of the pressure reducer and adjust if required. Set value: Max. 3.0 bar (0.3 MPa) 2.
  • Page 52 Commissioning, inspection, maintenance Checking the combustion quality (cont.) Permissible CO or O content Operation with natural gas Rated heating out- content (%) content (%) put (kW) Upper heating out- Lower heating out- Upper heating out- Lower heating out- 7.3 - 10.5 7.5 - 10.5 2.1 - 7.9 2.1 - 7.6...

  • Page 53: Checking The Flue System For Unrestricted Flow And Leaks

    Commissioning, inspection, maintenance Checking the combustion quality (cont.) 07. OK 14. OK 08. Use to set the max. value. 15. Set the lower heating output: Select "Minimum heating output". 09. OK The burner now operates at the lower heating out- put.

  • Page 54: Instructing The System User

    Commissioning, inspection, maintenance Calling up and resetting the service display (cont.) Service reset (after service has been carried out) 2. Use to select "Reset service messages". and OK – press simultaneously for approx. 4 s, 3. OK then release. Fitting the front panel Fig.

  • Page 55: Calling Up Parameters

    System configuration (parameters) Calling up parameters Parameters are split into the following groups: 2. Use to select "System configuration". ■ – "General" – "Boiler" 3. OK – "DHW" (domestic hot water) – "Heating circuit 1/2/3" 4. Use to select the required group. "Solar"...
  • Page 56 System configuration (parameters) General (cont.) 897.0 "Screed drying" Setting Explanations Not active Screed drying can be set in accordance with selecta- ble temperature/time profiles. For individual profile curves, see chapter "Function description". Diagram 1 Diagram 2 Diagram 3 Diagram 4 Diagram 5 Diagram 6 912.0 "Automatic summer/wintertime changeover"...

  • Page 57: Boiler

    System configuration (parameters) General (cont.) 1098.5 "Calorific value" Setting Explanations Value is provided on the gas supplier's bill. Used for gas consumption data. 10.0000 5.0000 to Calorific value adjustable from 5.0000 to 40.0000 40.0000 kWh/m in increments of 0.0001 1139.0 "Outside temperature limit for cancelling reduced set room temperature" Setting Explanations Temperature limit for cancelling reduced set room...
  • Page 58 System configuration (parameters) Boiler (cont.) 522.3 "Interval until the next service" Setting Explanations Interval until the next service No interval selected 3 months 6 months 12 months 18 months 24 months 1411.0 "Clear maintenance messages" Setting Explanations Clear maintenance messages once maintenance has been performed.

  • Page 59: Dhw

    System configuration (parameters) Boiler (cont.) 1432.2 "Operating mode of primary circuit pump" Setting Explanations Internal circulation pump is operated with constant dif- ferential pressure. 1 to 20 Internal circulation pump is operated with rising differ- ential pressure. Adjustable from 1 to 20 mbar 1503.0 "Minimum heating output"...

  • Page 60: Heating Circuit 1, Heating Circuit 2, Heating Circuit 3, Heating Circuit 4

    System configuration (parameters) (cont.) 497.2 "DHW circulation pump for DHW heating" Setting Explanations DHW circulation pump: OFF during DHW heating to standard set value ON during DHW heating to standard set value 503.0 "Scald protection" Setting Explanations The adjustable water temperature is limited to a maxi- mum value.
  • Page 61 System configuration (parameters) Heating circuit 1, Heating circuit 2, Heating… (cont.) 426.3 "Set flow temperature increased when switching from operation with reduced room temperature to operation with standard/comfort room temperature, heating circuit 2" Setting Explanations Set flow temperature increased when changing from operation at reduced room temperature to operation at standard room temperature or comfort room tempera- ture.
  • Page 62 System configuration (parameters) Heating circuit 1, Heating circuit 2, Heating… (cont.) 933.7 "Room influence factor, heating circuit 1" Setting Explanations The higher the value, the greater the influence of the room temperature on the set flow temperature of the heating circuit (heating curve). Operation with room temperature hook-up must be set for the heating cir- cuit (parameter 933.6).
  • Page 63 System configuration (parameters) Heating circuit 1, Heating circuit 2, Heating… (cont.) 935.3 "Priority, DHW heating, heating circuit 3" Setting Explanations Priority of DHW heating over heating circuit pump and mixer Without DHW heating priority With DHW heating priority 935.5 "Differential temperature, heating circuit 3" Setting Explanations The flow temperature of the heat generator is higher...
  • Page 64 System configuration (parameters) Heating circuit 1, Heating circuit 2, Heating… (cont.) 1192.0 "Minimum flow temperature limit, heating circuit 1" Setting Explanations Minimum flow temperature limit for the heating circuit 20 °C Minimum limit in the delivered condition 20 °C 1 to 90 Setting range limited by heat generator-specific pa- rameters 1192.1 "Maximum flow temperature limit, heating circuit 1"...

  • Page 65: Subscriber Numbers Of Connected Extensions

    System configuration (parameters) Heating circuit 1, Heating circuit 2, Heating… (cont.) 1395.0 "Heating limit: Economy function, outside temperature, heating circuit 1" Setting Explanations Heating circuit pump logic function (summer economy control): Heating circuit pump switches off when out- side temperature 1 K above selected value. Heating circuit pump switches back on when outside tempera- ture 1 K below selected value.
  • Page 66 System configuration (parameters) Subscriber numbers of connected extensions (cont.) EM-P1 extension ■ – If no heating circuits with mixer are available in the system: 1 – If heating circuits with mixer (EM-M1 or EM-MX extensions) are present in the system: Always set subscriber number for EM-P1 extension to the con- secutive number after EM-M1 or EM-MX exten- sions.

  • Page 67: Service Menu

    Diagnosis and service checks Service menu Calling up the service menu Tap the following buttons: Note Tap " " to return to "Service, main menu" and OK – press simultaneously for approx. 4 s, then release. 2. Select the required menu section. Note Not all menu areas will be available, depending on the system equipment level.

  • Page 68: Checking Outputs (Actuator Test)

    Diagnosis and service checks Diagnosis (cont.) 3. OK 5. OK 4. Use to select the required group. 6. Select the required information with Checking outputs (actuator test) Note 06. OK When the actuator test is started, all actuators are ini- tially disabled and valves moved to their central posi- 07.
  • Page 69 Diagnosis and service checks Checking outputs (actuator test) (cont.) Display Explanation Mixer, heating circuit 2 Open Output for "Mixer open" enabled (mixer extension kit) Stop Current position is maintained Close Output for "Mixer close" enabled Mixer, heating circuit 3 Open Output for "Mixer open"...

  • Page 70: Fault Display On The Programming Unit

    Troubleshooting Fault display on the programming unit If there is a fault, the display shows "Burner fault" or If "Connection error" appears on the display: "Active messages". Check connecting cable and plug between HMU heat management unit and HMI programming unit. Note If a central fault message facility is connected, this is switched on.

  • Page 71: Calling Up Fault Messages From The Fault Memory (Message History)

    Troubleshooting Fault display on the programming unit (cont.) Description of the fault ■ ■ Subscriber number of the component on which the fault has occurred: PlusBus subscriber components EM-S1 extension (ADIO electronics module) 1 - 15 EM-M1, EM-MX and EM-P1 extensions (ADIO electronics module) 17 - 31 EM-EA1 extension (DIO electronics module) 32 - 47 Cylinder module, EM-M2, EM-S2 extensions...

  • Page 72: Deleting Messages

    Troubleshooting Fault display on the programming unit (cont.) Deleting messages and OK – press simultaneously for approx. 4 s, 4. Use to select "Delete messages". then release. 5. OK 2. "Message history" 6. OK to confirm the message. 3. OK Overview of electronics modules Fig.

  • Page 73: Fault Messages

    Troubleshooting Fault messages Fault number System characteristics Cause Measures on the display No DHW heating Lead break, cylinder tem- Check cylinder temperature sensor perature sensor (see page 91). No DHW heating Short circuit, cylinder tem- Check cylinder temperature sensor perature sensor (see page 91).
  • Page 74 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.67 Burner in a fault state Ionisation current lies out- Check gas supply (gas pressure side the permissible range and gas flow switch), gas train and connection line. Check ionisation electrode for the following: Distance to burner gauze assem-...
  • Page 75 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.104 Depending on configuration External fault message in- Check connected external device. of EM-EA1 extension (DIO put active electronics module) F.142 Burner in a fault state Communication error, fan Check the fan unit connecting ca- unit ble.
  • Page 76 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.346 Burner in a fault state Ionisation current calibra- Check the gas supply pressure. ■ tion error Check gas train strainer on the inlet side for contamination. Check ionisation electrode for ■...
  • Page 77 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.355 Burner in a fault state Analogue signal reference Check system for condensate check: Flame signal is al- backup. ready present at burner start. Note To prevent water damage, detach fan unit before removing the burn- Reset the appliance.
  • Page 78 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.367 Burner in a fault state Gas valve electricity sup- Reset the appliance. ply does not turn off. F.368 Burner locked out Gas pressure switch fault. Check gas supply (gas pres- ■...
  • Page 79 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.372 Burner in a fault state Repeated flame loss dur- Check ionisation electrode and ing calibration connecting cable. Check the plug- in connections. Check flue system; remove flue gas recirculation if required.
  • Page 80 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.375 Burner in a fault state Performing ionisation cur- Check ionisation electrode and rent calibration: Calibra- connecting cable. Check plug-in tion not performed. Mini- connections for loose contacts. mum value or termination Check flue system;...
  • Page 81 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.377 Burner in a fault state Post-processing ionisation Check ionisation electrode and current calibration: Stabili- connecting cable. Check plug-in sation conditions for post- connections for loose contacts. calibration not reached Check flue system;...
  • Page 82 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.380 Burner in a fault state Flame is lost immediately Check gas supply (gas pressure after flame formation (dur- and gas flow switch). ing safety time). Check balanced flue system for flue gas recirculation.
  • Page 83 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.400 Burner in a fault state Lead break, ionisation Check ionisation electrode and voltage, signal 1 connecting cable. Reset the appliance. F.401 Burner in a fault state Short circuit, ionisation Check ionisation electrode and voltage, signal 2...
  • Page 84 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.430 Connection of automation Communication error Check gateway module connecting modules not possible gateway cable and power supply. F.432 Burner locked out if fault con- Short circuit, fan speed Check ventilation air supply;...
  • Page 85 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.455 Burner in a fault state Error in logical program Reset the appliance. run monitoring F.456 Burner in a fault state System status at system Reset the appliance. start F.457 Burner in a fault state...
  • Page 86 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.464 Burner in a fault state Ionisation current too low Check ionisation electrode and during calibration. Differ- connecting cable. Check plug-in ence compared to previ- connections for loose contacts. ous value not plausible.
  • Page 87 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.468 Burner in a fault state Ionisation current too high Check gap between ionisation during calibration electrode and burner gauze as- sembly. Heat generator installation and service instructions Check whether there is a lot of dust in the ventilation air (e.g.
  • Page 88 Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.543 Mixer closes. Heating circuit Short circuit, flow temper- Check flow temperature sensor pump is operational. ature sensor for heating TS1 on extension kit mixer (ADIO circuit 1 with mixer electronics module).

  • Page 89: Repairs

    Troubleshooting Fault messages (cont.) Fault number System characteristics Cause Measures on the display F.582 Control mode without room Short circuit, room tem- Check external room temperature influence perature sensor, heating sensor for heating circuit or room circuit 3 temperature sensor for remote control unit.

  • Page 90: Draining The Boiler On The Heating Water Side

    Troubleshooting Repairs (cont.) Draining the boiler on the heating water side Fig. 49 1. Close the shut-off valves on the heating water side. 4. Open air vent valve and drain the boiler as much as required. 2. Connect hose to air vent valve and route it into a suitable container or drain outlet.

  • Page 91: Checking The Temperature Sensors

    Troubleshooting Repairs (cont.) Checking the temperature sensors 6 5 4 3 2 1 6 5 4 3 2 1 6 5 4 3 2 1 Fig. 50 Heat generator circuit flow temperature sensor 3. Check the sensor resistance. Note position of (dual sensor) guide lug ■...
  • Page 92 Troubleshooting Repairs (cont.) Cylinder temperature sensor/outlet temperature Flue gas temperature sensor sensor 1. Check the lead and plug of flue gas temperature 1. Check lead and plug of cylinder temperature sen- sensor or outlet temperature sensor 2. Disconnect leads, flue gas temperature sensor 2.

  • Page 93: Information On Replacing The Hmu Heat Management Unit And Bcu Burner Control Unit

    Troubleshooting Repairs (cont.) Flue gas temperature sensor Outside temperature sensor ■ ■ Flow temperature sensor ■ Cylinder temperature sensor ■ Outlet temperature sensor ■ Temperature sensor, low loss header ■ -20 -10 0 10 20 10 30 50 70 90 110 Temperature in °C Temperature in °C Sensor type: NTC 10 k...

  • Page 94: Checking The Plate Heat Exchanger

    Troubleshooting Repairs (cont.) Checking the plate heat exchanger 8. 3. Fig. 51 1. Drain the boiler: 5. Check the connections on the heating water and On the heating water side, see page 90 DHW sides for contamination and scaling; replace ■...

  • Page 95: Removing The Hydraulic Unit And Return Pipe

    Troubleshooting Repairs (cont.) Removing the hydraulic unit and return pipe In case hydraulic unit components have to be replaced. 2. 3x Fig. 52...

  • Page 96: Replacing The Power Cable

    Repairs (cont.) Remove the return pipe: Fig. 53 Note After replacing the return pipe, use a new cable tie. Replacing the power cable When replacing the power cable, only use the power cable available as a spare part from Viessmann.

  • Page 97: Checking The Fuse

    Troubleshooting Repairs (cont.) Checking the fuse Fig. 54 1. Turn off the ON/OFF switch. 5. Check fuse F1 (see connection and wiring dia- gram). 2. Depending on the configuration: Move program- ming unit together with bracket to service position. Danger Incorrect or improperly fitted fuses can lead 3.

  • Page 98: Control Functions

    Function description Control functions Heating mode The control unit determines a set flow temperature for If a heating circuit without mixer is connected down- the heat generator, subject to the outside temperature stream of the low loss header, the circulation pump or the room temperature and the slope/level of the can be connected to output P2.
  • Page 99 Function description Control functions (cont.) Slope -5 -10 -15 -20 Outside temperature in °C Fig. 55 Slope setting ranges: Reduced room temperature ■ Underfloor heating systems: 0.2 to 0.8 ■ Low temperature heating systems: 0.8 to 1.6 Set room temperature Standard room temperature or comfort room tem- perature Individually adjustable for each heating circuit.

  • Page 100: Screed Drying

    Function description Control functions (cont.) Room influence factor parameter Heating circuit Parameter 1 (without mixer) 933.7 (not assigned) 2 (with mixer) 934.7 3 (with mixer) 935.7 4 (with mixer) 936.7 Example for determining the increase in the flow tem- perature using the value of the heating curve when the actual room temperature deviates from the set room temperature: Set room temperature = 20.0 °C...
  • Page 101 Function description Control functions (cont.) Parameter 897.0 "Screed drying": Temperature profile 1 (EN 1264-4) Days Fig. 59 Temperature profile 2 (ZV parquet and flooring technology) Days Fig. 60 Temperature profile 3 Days Fig. 61 Temperature profile 4 Days Fig. 62 Temperature profile 5 Days Fig.

  • Page 102: Raising The Reduced Room Temperature

    Function description Control functions (cont.) Temperature profile 6 Days Fig. 64 Ends after 21 days. Raising the reduced room temperature During operation at reduced room temperature, the The outside temperature limits for the start and end of reduced set room temperature can be automatically temperature raising can be set in parameters 1139.0 raised subject to the outside temperature.

  • Page 103: Dhw Heating

    Function description Control functions (cont.) Reducing the heat-up time The value and duration of the additional increase in the set flow temperature is adjusted in parameters 424.3 During the transition from operation at reduced room and 424.4. temperature to operation at standard room tempera- ture or comfort room temperature, the flow tempera- ture will be raised in accordance with the selected heating curve.

  • Page 104: Increased Dhw Hygiene

    Function description DHW heating (cont.) After the draw-off process has ended, the loading cyl- inder continues to be heated up until the set DHW tem- perature is reached at the cylinder temperature sensor. Increased DHW hygiene The DHW can be heated to a specified (higher) set Danger DHW temperature (approx.

  • Page 105: Hmu Heat Management Unit

    Connection and wiring diagram HMU heat management unit Fig. 67 A1 HMU heat management unit Outside temperature sensor A2 HMI programming unit with RF module (wireless Cylinder temperature sensor module) Power supply fÖ A3 Switching mode power supply PlusBus X... Electrical interfaces CAN bus...
  • Page 106 Connection and wiring diagram HMU heat management unit (cont.) Floating input 230 V, output 230 V To BCU burner control unit Mains voltage output To BCU burner control unit P1 Cylinder loading pump P2 Parametrisable output for: DHW circulation pump ■...

  • Page 107: Bcu Burner Control Unit

    Connection and wiring diagram BCU burner control unit Fig. 68 PWM Control signal Power supply fÖ X... Electrical interfaces Ignition unit § A/B Flow temperature sensors 1 and 2 Fan motor a-Ö Outlet temperature sensor A Fan motor control a-Ö Ionisation electrode Water pressure sensor Flue gas temperature sensor...
  • Page 108 Commissioning/service reports Commissioning/service reports Settings and test values Set value Commission- Maintenance/ Maintenance/ service service Date Signature Static pressure mbar 57.5 ≤ 5.75 ≤ Supply pressure (flow pres- sure) For natural gas ..mbar See table "Supply pressure" For LPG ..mbar (Commis- sioning ...)

  • Page 109: Specification

    Specification Specification Rated heating output range (to EN 15502-1) = 50/30 °C (P(50/30)) Natural gas 1.9 - 19 1.9 - 25 1.9 - 32 2.5 - 19 2.5 - 25 2.5 - 32 = 80/60 °C (Pn(80/60)) Natural gas 1.7 - 17.4 1.7 - 22.9 1.7 - 29.3 2.2 - 17.4...
  • Page 110 Specification Specification (cont.) Rated heating output range (to EN 15502-1) = 50/30 °C (P(50/30)) Natural gas 1.9 - 19 1.9 - 25 1.9 - 32 2.5 - 19 2.5 - 25 2.5 - 32 = 80/60 °C (Pn(80/60)) Natural gas 1.7 - 17.4 1.7 - 22.9 1.7 - 29.3...

  • Page 111: Electronic Combustion Control Unit

    Specification (cont.) Gas categories Available in the following countries Gas categories AE, AT, AM, BA, BG, BY, CH, CZ, DK, EE, ES, FI, GB, 2N3P 2H3P GR, HR, IE, IS, IT, KG, KZ, LI, LT, LU, LV, MT, NO, PT, RO, RS, RU, SE, SI, SK, TR, UA AM, BY, KG, KZ, RU, UA DE, FR...

  • Page 112: Final Decommissioning And Disposal

    Disposal Final decommissioning and disposal Viessmann products can be recycled. Components For decommissioning the system, isolate the system and substances from the system are not part of ordi- from the power supply and allow components to cool nary household waste.

  • Page 113: Declaration Of Conformity

    Certificates Declaration of conformity We, Viessmann Werke GmbH & Co. KG, D-35107 Using the serial number, the full Declaration of Con- Allendorf, declare as sole responsible body that the formity can be found on the following website: named product complies with the European directives www.viessmann.co.uk/eu-conformity...
  • Page 114 Keyword index Keyword index Function descriptions..........98 Angle of penetration........... 23 Fuse................97 Boiler, draining on the DHW side....... 46 Gas supply pressure..........35 Boiler water temperature sensor........ 91 Gas train ..............35 Burner control unit............107 Gas type..............34 – Connection diagram..........107 Gas type conversion..........
  • Page 115 Keyword index Keyword index (cont.) Range of WiFi connections........22 Parameter Reduced set room temperature......... 99 – Automatic summer/wintertime changeover..... 56 Reducing heat-up output..........102 – Burner hours until next service........57 Reducing heat-up time..........103 – Calorific value, gas..........57 Relay test..............68 –...
  • Page 116 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 Fax: +44 1952 675040 E-mail: info-uk@viessmann.com...

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