Viessmann VITODENS 222-W Installation And Service Instructions For Contractors
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Viessmann VITODENS 222-W Installation And Service Instructions For Contractors

Viessmann VITODENS 222-W Installation And Service Instructions For Contractors

1.9 to 32 kw gas condensing storage combi boiler natural gas and lpg version
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VIESMANN
Installation and service instructions
for contractors
Vitodens 222-W
Type B2LE, 1.9 to 32 kW
Gas condensing storage combi boiler
Natural gas and LPG version
VITODENS 222-W
Please keep safe.
6130945 GB
3/2020

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Summary of Contents for Viessmann VITODENS 222-W

  • Page 1 VIESMANN Installation and service instructions for contractors Vitodens 222-W Type B2LE, 1.9 to 32 kW Gas condensing storage combi boiler Natural gas and LPG version VITODENS 222-W Please keep safe. 6130945 GB 3/2020...

  • Page 2: Target Group

    Safety instructions Safety instructions Please follow these safety instruc- tions closely to prevent accidents and material losses. Safety instructions explained Danger Note This symbol warns against the risk Details identified by the word "Note" of injury. contain additional information. Please note This symbol warns against the risk of material losses and environmen- tal pollution.

  • Page 3: Safety Instructions

    Viessmann. water pipes to discharge static loads. Repair work Please note Repairing components that fulfil a safety function can compromise the safe operation of the system. Replace faulty components only with genuine Viessmann spare parts.

  • Page 4: If You Smell Flue Gas

    Safety instructions Safety instructions (cont.) Safety instructions for operating the system If you smell gas Condensate Danger Danger Escaping gas can lead to explo- Contact with condensate can be sions which may result in serious harmful to health. injury. Never let condensate touch your Do not smoke.
  • Page 5 Safety instructions Safety instructions (cont.) Danger The simultaneous operation of the boiler and appliances that exhausts air to the outside can result in life threatening poisoning due to a reverse flow of flue gas. Fit an interlock circuit or take suita- ble steps to ensure an adequate supply of combustion air.

  • Page 6: Table Of Contents

    Index Index 1. Information Disposal of packaging ................Symbols ....................Intended use ..................Product information ................Vitodens 222-W, type B2LE ..............■ System examples .................. Spare parts lists ..................2. Preparing for installation ........................ 10 3. Installation sequence Removing the boiler from the packaging ..........12 Mounting the boiler and making connections ........
  • Page 7 Index Index (cont.) 7. Troubleshooting Fault display on the programming unit ........... 78 Fault display on the programming unit ..........78 ■ Overview of electronics modules ............80 Fault messages ..................81 Repairs ....................97 Draining the boiler on the heating water side ........97 ■...

  • Page 8: Information 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 9: Product Information

    ■ Weather-compensated or constant temperature con- The Vitodens 222-W may only be delivered to coun- trol unit tries listed on the type plate. For deliveries to other ■ Integral diaphragm expansion vessel (10 l capacity)

  • Page 10: Preparing For Installation

    Preparing for installation Preparing for installation 507,5 149,5 Ø 96 -0,5 Ø 60,5 +0,8 494,5 38,5 E FG H Fig. 1 Heating flow Gas connection Heating return Safety valve Filling/draining Cold water Condensate drain Note 2. Prepare the water connections to the valves/fittings This boiler (IP rating: IP X1) is approved for installation of the mounting bracket.

  • Page 11: Connection On The Dhw Side

    Preparing for installation Preparing for installation (cont.) 4. Prepare the electrical connections. ■ The appliance is delivered fitted with a power cable (approx. 2 m long). Note Connect the power cable to the electricity supply using a fixed connection. Power supply: 230 V, 50 Hz, fuse rating ■...

  • Page 12: Installation Sequence Removing The Boiler From The Packaging

    Installation sequence Removing the boiler from the packaging Fig. 3...

  • Page 13: Mounting The Boiler And Making Connections

    Installation sequence Mounting the boiler and making connections Mounting the boiler on the pre-plumbing jig or mounting frame Note Various installation components can be found in a sep- arate pack on the front panel. Keep the installation components safe, as they will be required for later installation.
  • Page 14 Installation sequence Mounting the boiler and making connections (cont.) Note 2. Note The diagram shows installation on a pre-plumbing jig. After mounting, ensure correct seating. The boiler can be installed on the following accesso- 3. Note ries: Only remove the clip under the gas pipe union nut Pre-plumbing jig once the appliance has been installed.

  • Page 15: Fitting The Boiler To The Wall Mounting Bracket

    Installation sequence Mounting the boiler and making connections (cont.) Fitting the boiler to the wall mounting bracket Note Various installation components can be found in a sep- arate pack. Keep the installation components safe, as they will be required for later installation. Fig.

  • Page 16: Removing The Front Panel

    Installation sequence Mounting the boiler and making connections (cont.) 1. Replace gaskets. Fit valves and gas shut-off valve. 3. Note Only remove the clip under the gas pipe union nut Internal gasket diameter: once the appliance has been installed. Clip is no ■...

  • Page 17: Type Plate

    Installation sequence Mounting the boiler and making connections (cont.) Type plate Note 1. Take the additional type plate from the documenta- tion supplied with the boiler. The type plate is attached to cover panel in the appliance. See page 46. Note Additional type plate with access code (QR code) The documentation with the additional type plate...

  • Page 18: Fitting The Programming Unit Mounting Bracket On The Top Of The Boiler

    Installation sequence Mounting the boiler and making connections (cont.) Fitting the programming unit mounting bracket on the top of the boiler In the delivered condition, the programming unit is located on the underside of the boiler. If required for ease of operation, the programming unit can be loca- ted on the top of the boiler.

  • Page 19: Connections On The Heating Water And Dhw Sides

    Installation sequence Mounting the boiler and making connections (cont.) 4. Pull the plug of the connecting cable from the 6. Turn the bracket over and insert the plug on the bracket. right-hand side again. Please note Incorrect routing of the cable can lead to heat damage and impairment of the EMC properties.

  • Page 20: Condensate Connection

    Installation sequence Condensate connection Fig. 9 Connect the drain hose with a constant fall and a pipe vent to the public sewage system or to a neutralising system. Note Route the onward drain line inside the building as far as possible. If the onward drain line is routed outside the building: Use a min.

  • Page 21: Filling The Trap With Water

    Free passage through the flue gas pipes. ■ tion may only be used in conjunction with the Flue system with positive pressure is gas-tight. ■ Viessmann flue system made by Skoberne. Inspection port covers checked for secure and tight ■ seating. Connecting the balanced flue pipe ■...

  • Page 22: Gas Connection

    Installation sequence Gas connection Fig. 11 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 23: Electrical Connections

    Installation sequence Electrical connections Opening the wiring chamber Note If only PlusBus and the outside temperature sensor are connected to the boiler, the wiring chamber does not need to be opened. 5. 2x Fig. 12 Note Please note Steps 1 to 3 are required only if the programming unit Electronic assemblies can be damaged by elec- is located at the bottom.

  • Page 24: Layout Of The Electrical Connections

    Installation sequence Electrical connections (cont.) Layout of the electrical connections Note For further information on the connections, see the fol- lowing chapters. 6 5 4 3 2 1 6 5 4 3 2 1 Fig. 13 Connections to 230 V~ plugs Connections to extra low voltage (ELV) plugs Power supply Outside temperature sensor...

  • Page 25: On-Site Connections On Hmu Heat Management Unit

    Installation sequence Electrical connections (cont.) On-site connections on HMU heat management unit Fig. 14 Plug-in connection on underside of appliance. Plug for connecting sensors and PlusBus Remove plug from the pack of installation compo- nents. Aperture for cable entry Required plugs are supplied in separate packaging. For cables without strain relief bushings, provide strain relief in the wiring chamber in the form of cable ties.

  • Page 26: Connecting The Circulation Pump To P2

    ■ External blocking ■ DHW circulation pump external demand (pushbutton function, pump runs for 5 min). Not for Vitodens 222-W. Room temperature controller (room thermostat) ■ In conjunction with operating mode Continuous oper- Fig. 16 ation with room temperature controller (not for...

  • Page 27: Power Supply For Accessories At Plug Lh / Abh (230 V ~)

    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 28 Installation sequence Electrical connections (cont.) Power supply and PlusBus connection of accessories Power supply of all accessories at the HMU heat management unit Fig. 20 Some accessories with direct power supply Fig. 21 HMU heat management unit, heat generator ON/OFF switch Mixer extension kit (ADIO electronics module) Mains input fÖ...

  • Page 29: 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 power cable, ensure that the live con- result in injuries from electrical current and dam- ductors are pulled taut before the earth conductor in age to the appliance.

  • Page 30: Wifi Operational Reliability And System Requirements

    Installation sequence Electrical connections (cont.) Bundle cables using the supplied cable ties. Secure the cable ties to the underside. Do not route cables over sharp edges. Please note If connecting cables/leads come into contact with hot components, they will be damaged. When routing and securing cables/leads on site, ensure that the maximum permissible tempera- tures for these cables/leads are not exceeded.
  • Page 31 Installation sequence WiFi operational reliability and system… (cont.) Flat (unfavourable) angle of penetration Ideal angle of penetration Fig. 23 Fig. 24 WiFi router Heat generator WiFi router Wall Heat generator Wall...

  • Page 32: Closing The Wiring Chamber

    Installation sequence Closing the wiring chamber 2. 2x Fig. 25...

  • Page 33: Fitting The Programming Unit And Front Panel

    Installation sequence Fitting the programming unit and front panel Programming unit located at the bottom Fig. 26 Lightguide at the top...

  • Page 34: Programming Unit Located At The Top

    Installation sequence Fitting the programming unit and front panel (cont.) Programming unit located at the top Fig. 27 1. Install the mounting panel for the programming unit 3. Turn Lightguide around and clip it into place at at the top. the bottom of the programming unit.

  • Page 35: Commissioning, Inspec-Steps - Commissioning, Inspection And Maintenance

    Commissioning, inspection, maintenance Steps - commissioning, inspection and maintenance Commissioning steps Inspection steps Maintenance steps Page • 1. Commissioning the system with the commissioning assistant........36 • • 2. Filling the heating system....................40 • 3. Filling the loading cylinder on the DHW side..............42 •...

  • Page 36: Commissioning The System With The Commissioning Assistant

    Commissioning, inspection, maintenance Commissioning the system with the commissioning assistant Please note Only commission the appliance with a fully filled trap. Check that the trap has been filled with water. Commissioning assistant 1. Open the gas shut-off valve. 3. Commission the heat generator and follow the commissioning assistant.

  • Page 37: Commissioning, Inspection, Maintenance

    Commissioning, inspection, maintenance Commissioning the system with the commissioning… (cont.) Commissioning assistant Explanations and references sequence Set value Select the set system pressure, e.g. 1.5 bar. ■ Range Select the range within which the system pressure can fluctuate around the ■...
  • Page 38 Commissioning, inspection, maintenance Commissioning the system with the commissioning… (cont.) Commissioning assistant Explanations and references sequence Low loss header, heating System with low loss header, without DHW heating ■ only DHW heating upstream DHW heating with e.g. separate DHW cylinder connected upstream of the low ■...
  • Page 39 Commissioning, inspection, maintenance Commissioning the system with the commissioning… (cont.) Commissioning assistant Explanations and references sequence Plug 96 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 40: Filling The Heating System

    Commissioning, inspection, maintenance Commissioning the system with the commissioning… (cont.) Calling up the commissioning assistant at a later 2. Use to select "Basic settings". point 3. OK If you need to continue commissioning later, the com- missioning assistant can be reactivated at any time. 4.
  • Page 41 Commissioning, inspection, maintenance Filling the heating system (cont.) Fig. 29 ON/OFF switch 1. Check the pre-charge pressure of the expansion 5. Fit hose to air vent valve . Route the hose into a vessel. suitable container or drain outlet. 2. Close gas shut-off valve 6.

  • Page 42: Filling The Loading Cylinder On The Dhw Side

    Commissioning, inspection, maintenance Filling the loading cylinder on the DHW side Fig. 30 1. Valves must be in the "top" position. 3. Once air stops coming out of the DHW draw-off point, the loading cylinder is completely filled. 2. Open the cold water line and a DHW draw-off point.

  • Page 43: Venting The Heating System

    Commissioning, inspection, maintenance Venting the heating system 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 44: Removing The Front Panel

    Commissioning, inspection, maintenance Removing the front panel Fig. 32...

  • Page 45: Moving The Programming Unit To The Maintenance Position

    Commissioning, inspection, maintenance Moving the programming unit to the maintenance position To facilitate certain maintenance tasks, move the pro- gramming unit up or down, depending where it is loca- ted. Fig. 33 Do not disconnect the plug from the mounting panel. Do not alter where and how the cable is secured (fixing point of the cable tie).

  • Page 46: Checking The Static Pressure And Supply Pressure

    Commissioning, inspection, maintenance Checking the static pressure and supply pressure Fig. 34 Danger 07. Check the supply (flow) pressure. For set values, CO formation as a result of incorrect burner see the following table. adjustment can have serious health implications. Carry out a CO test before and after work on Note gas appliances.

  • Page 47: Function Sequence And Possible Faults

    Commissioning, inspection, maintenance Checking the static pressure and supply pressure (cont.) Supply pressure (flow pressure) Measures For natural gas For LPG E, E+, M L, LL, S, K Below 13 mbar Below Below Below Below Do not start the boiler. Notify (1.3 kPa) 17 mbar 18 mbar...

  • Page 48: Setting The Max. Heating Output

    Commissioning, inspection, maintenance Function sequence and possible faults (cont.) Burner in operation Shuts down below the set Check the flue system for boiler water temperature and tightness (flue gas recircula- restarts immediately. tion). Check gas flow pres- sure. Automatic calibration of Fault F.62, F.373 Ensure adequate heat trans- the combustion controller...
  • Page 49 Min. speed: Parameter 1102.0 ■ Speed setting (%): Parameter 1100.2 in the Boiler Max. speed: Parameter 1102.1 ■ group Residual head of integral circulation pump Vitodens 222-W to 25 kW 500 50 450 45 350 35 250 25 150 15 1000...

  • Page 50: Activating Screed Drying

    Commissioning, inspection, maintenance Adjusting the pump rate of the integral… (cont.) Vitodens 222-W with 32 kW 550 55 500 50 450 45 350 35 250 25 150 15 1000 1100 1200 Flow rate in l/h Fig. 37 Upper operational limit...

  • Page 51: Tightness Test On Balanced Flue System (Annular Gap Check)

    Commissioning, inspection, maintenance Tightness test on balanced flue system (annular gap check) Fig. 38 Combustion air aperture For balanced flue systems tested together with the If actual CO values are greater or O values are lower, heat generator, there is no requirement for a tightness then pressure test the flue pipe with a static pressure test (overpressure test) during commissioning by the of 200 Pa.
  • Page 52 Commissioning, inspection, maintenance Removing the burner (cont.) Fig. 39 1. Turn off the ON/OFF switch. 4. Undo gas supply pipe fitting 2. Close the gas shut-off valve and safeguard against 5. Undo four screws and remove the burner. reopening. Note 3.

  • Page 53: Checking The Burner Gasket And Burner Gauze Assembly

    Commissioning, inspection, maintenance Checking the burner gasket and burner gauze assembly Fig. 40 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 54: Checking And Adjusting The Ignition And Ionisation Electrodes

    Commissioning, inspection, maintenance Checking and adjusting the ignition and ionisation electrodes ±0.5 Fig. 41 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 55: Cleaning The Heating Surfaces

    Commissioning, inspection, maintenance Checking the back draught safety devices (cont.) 1. Remove the balanced flue system. 3. Refit the balanced flue system. Note 4. Pour a small amount of water through the inspec- If the balanced flue system cannot be removed, tion port to ensure the back draught safety device clean and check the back draught safety device via is working.
  • Page 56 Commissioning, inspection, maintenance Checking the condensate drain and cleaning the… (cont.) Fig. 45 01. Move the bracket together with the programming 09. Reconnect the supply hose and secure in place unit upwards. See "Moving the programming unit with cable ties. to the maintenance position".

  • Page 57: Installing The Burner

    Commissioning, inspection, maintenance Installing the burner Fig. 46 1. If necessary, move the programming unit. 5. Connect the cables/leads: ■ Fan motor (2 plugs) 2. Insert the burner. Tighten screws diagonally. ■ Ionisation electrode Torque: 6.5 Nm Ignition unit ■ ■...

  • Page 58: Checking The Expansion Vessel And System Pressure

    Commissioning, inspection, maintenance Checking the expansion vessel and system pressure Note 3. Top up with water until the charge pressure of the The expansion vessel can lose some of its charge cooled system is at least 1.0 bar (0.1 MPa), and is pressure over time.

  • Page 59: Checking The Dhw Expansion Vessel (If Installed) And The Pre-Charge Pressure

    Commissioning, inspection, maintenance Checking the DHW expansion vessel (if installed) and the pre-charge pres- sure Fig. 47 1. Check the static pressure of the DHW line down- 5. Drain the pipe via air vent valve stream of the pressure reducer and adjust if required.

  • Page 60: Checking The Electrical Connections For Firm Seating 29. Checking All Gas Equipment For Tightness At Operating Pressure

    Commissioning, inspection, maintenance Checking the electrical connections for firm seating Checking all gas equipment for tightness at operating pressure Danger Note Escaping gas leads to a risk of explosion. Only use suitable and approved leak detection agents Check gas equipment (including inside the appli- (EN 14291) and devices for the tightness test.
  • Page 61 Commissioning, inspection, maintenance Checking the combustion quality (cont.) Fig. 48 1. Connect a flue gas analyser at flue gas port 6. Adjust the upper heating output. See the following the boiler flue connection. chapter. 2. Open the gas shut-off valve. Start the boiler. Cre- 7.

  • Page 62: Checking The Flue System For Unrestricted Flow And Leaks

    Commissioning, inspection, maintenance Checking the flue system for unrestricted flow and leaks Checking the external LPG safety valve (if installed) Matching the control unit to the heating system The control unit must be matched to the system equip- Accessories installation and service instructions ment level.
  • Page 63 Commissioning, inspection, maintenance Instructing the system user (cont.) DHW hygiene For optimum DHW hygiene, avoid DHW temperatures To activate the function, see the operating instructions. that are < 50 °C. For larger systems and systems with Inform the system user what DHW temperatures low water exchange, the temperature should not drop should be set and the risks associated with having a below <...

  • Page 64: System Configuration Calling Up Parameters

    System configuration (parameters) Calling up 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.
  • Page 65 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 66: 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 67 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 596.0 "Maximum heating output" Setting Explanations A limit can be set on the maximum heating output for heating mode.

  • Page 68: Dhw (Domestic Hot Water)

    System configuration (parameters) Boiler (cont.) 1606.0 "Minimum burner pause time" Setting Explanations The minimum burner pause time can be set subject to boiler load. Fixed setting for minimum burner pause time Delivered condition, integral method (see parameter 1606.4) 1606.4 "Integral threshold for burner switch-off" Setting Explanations Only effective if parameter 1606.0 has been set to 1.

  • Page 69: Heating Circuit 1, Heating Circuit 2, Heating Circuit 3

    System configuration (parameters) Heating circuit 1, Heating circuit 2, Heating circuit 3 Note Parameter values in bold are factory settings. 424.3 "Set flow temperature increased when switching from operation with reduced room temperature to operation with standard/comfort room temperature, heating circuit 1" Setting Explanations Set flow temperature increased when changing from...
  • Page 70 System configuration (parameters) Heating circuit 1, Heating circuit 2, Heating… (cont.) 428.4 "Duration for set flow temperature increase, heating circuit 3" Setting Explanations Duration for set flow temperature increase See also chapter "Function description" 60 min Delivered condition 60 min 0 to 120 Temperature rise adjustable from 0 to 120 min 933.3 "Priority, DHW heating, heating circuit 1"...
  • Page 71 System configuration (parameters) Heating circuit 1, Heating circuit 2, Heating… (cont.) 934.5 "Differential temperature, heating circuit 2" Setting Explanations The flow temperature of the heat generator is higher than the flow temperature of the heating circuit with mixer by an adjustable differential temperature. See also chapter "Function description".
  • Page 72 System configuration (parameters) Heating circuit 1, Heating circuit 2, Heating… (cont.) 935.6 "Operating mode of heating circuit 3" Setting Explanations Heating mode: Weather-compensated without room tem- Weather-compensated without room temperature in- perature hook-up fluence Weather-compensated with room tempera- Weather-compensated with room temperature influ- ture hook-up ence See also parameter 935.7...
  • Page 73 System configuration (parameters) Heating circuit 1, Heating circuit 2, Heating… (cont.) 1193.0 "Minimum flow temperature limit, heating circuit 2" 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 1193.1 "Maximum flow temperature limit, heating circuit 2"...

  • Page 74: Subscriber Numbers Of Connected Extensions

    System configuration (parameters) Heating circuit 1, Heating circuit 2, Heating… (cont.) 1397.1 "Heating limit: Economy function, outside temperature, heating circuit 3" 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 75: Diagnosis And Service 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 76: Checking Outputs (Actuator Test)

    Diagnosis and service checks Diagnosis (cont.) Operating data on heating circuits with mixer can only 2. Use to select "Diagnosis". be called up if such components are installed in the system. 3. OK Note 4. Use to select the required group. If a called up sensor is faulty, "- - -"...

  • Page 77: Diagnosis And Service Checks

    Diagnosis and service checks Checking outputs (actuator test) (cont.) Display Explanation Primary circuit pump Set value Internal circulation pump speed in % speed 3-way valve target posi- Heating 3-way diverter valve set to heating mode tion Middle 3-way diverter valve in central position (filling/draining) 3-way diverter valve set to DHW heating Heating circuit 1 pump Set value...

  • Page 78: Troubleshooting Fault Display On The Programming Unit

    Troubleshooting Fault display on the programming unit Fault display on the programming unit If there is a fault, the display shows "Burner fault" or Note "Active messages". Any connected central fault message facility is switched off. Note If an acknowledged fault is not remedied, the fault If a central fault message facility is connected, this is message will be redisplayed the following day at switched on.
  • Page 79 Troubleshooting Fault display on the programming unit (cont.) Calling up fault messages from the fault memory 5. OK (message history) for the required message The 10 most recent faults (including those remedied) and service messages are saved and can be called 7.

  • Page 80: Overview Of Electronics Modules

    Troubleshooting Overview of electronics modules Fig. 50 BCU burner control unit HMU heat management unit HMI programming unit with RF module...

  • Page 81: Fault Messages

    Troubleshooting Fault messages Note For diagnosis and troubleshooting, see chapter "Repairs". Fault messages are dependent on appliance equip- ment level. Displayed fault System characteristics Cause Measures code Flow rate not being moni- Lead break or short cir- Check plug 33/X6 and cable be- tored.
  • Page 82 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.15 No solar DHW heating or Lead break, cylinder tem- Check cylinder temperature sen- central heating backup perature sensor sor. Measure voltage at sensor input on electronics module. Set value: 3.3 V with sensor disconnected.
  • Page 83 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.62 Burner in a fault state High limit safety cut-out Check heating system fill level. ■ has responded. Check pre-charge pressure in di- ■ aphragm expansion vessel. Ad- just to required system pressure. Check whether flow rate is suffi- ■...
  • Page 84 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.69 Burner in a fault state Ionisation current lies out- Check ionisation electrode for the side the permissible range following: Check whether insulation block is ■ touching electrode ceramic. Check gas train: Activate "Mini- ■...
  • Page 85 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.92 Function of the relevant elec- ADIO electronics module Check setting in the commission- ■ tronics module in emergency communication error ing assistant and correct if re- mode quired. Check connections and leads to ■...
  • Page 86 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.163 Burner in a fault state Memory access checksum Reset the appliance. error BCU If fault occurs repeatedly, replace BCU burner control unit (see page 102). F.182 No DHW heating Short circuit, outlet tem- Check the outlet temperature sen- perature sensor (if instal-...
  • Page 87 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.346 Burner in a fault state Ionisation current calibra- Check the gas supply pressure. ■ tion error Check gas solenoid valve strain- ■ er on the inlet side for contami- nation.
  • Page 88 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.357 Burner in a fault state Insufficient gas supply Check that the gas shut-off valve ■ is open. Optically check input-side screen ■ in the gas solenoid valve for con- tamination.
  • Page 89 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.365 Burner in a fault state Relay contact gas valve Replace BCU burner control unit feedback implausible. Re- (see page 102). lay contact is sticking. F.366, F.367 Burner in a fault state Gas valve electricity sup- Replace BCU burner control unit ply does not turn off.
  • Page 90 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.373 Burner in a fault state Heat transfer too low dur- Ensure adequate heat transfer. ■ ing calibration Check circulation pump for faults, ■ Temperature limiter has scale or blockages. shut down.
  • Page 91 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.384 Burner in a fault state Possible contamination of Check gas line for contamination. ■ gas line Check the gas supply pressure. ■ Replace gas fan if required. ■ Reset the appliance.
  • Page 92 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.405 Burner in a fault state Ionisation electrode earth Check IO electrode for earth fault. fault, BCU burner control If fault continues to persist, replace unit faulty BCU burner control unit (see page 102).
  • Page 93 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.463 Burner in a fault state Contaminated combustion Heat generator installation air, flue gas recirculation and service instructions Check flue system for contamina- tion and flue gas recirculation. Clean flue system if required. Reset the burner.
  • Page 94 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.464 Burner in a fault state Ionisation current too low Check ionisation electrode and ■ during calibration. Differ- connecting cable. Check plug-in ential compared to previ- connections for loose contacts. ous value not plausible.
  • Page 95 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code 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 96 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.540 Burner in a fault state Condensate backup in the Check system for condensate ■ heat cell backup. Check the condensate drain and ■ trap. Replace insulation blocks, elec- ■...

  • Page 97: Repairs

    Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.548 Mixer closes. Heating circuit Short circuit, flow temper- Check flow temperature sensor, ■ pump is operational. ature sensor for heating mixer 4. circuit 4 with mixer Measure voltage at sensor input ■...

  • Page 98: Draining The Boiler On The Dhw Side

    Troubleshooting Repairs (cont.) Fig. 51 1. Switch on the control unit. Call up the actuator test 4. Close heating flow shut-off valve and heating and put the diverter valve into its central position return shut-off valve (see "Actuator and sensor test"). 5.

  • Page 99: Removing The Boiler From The Pre-Plumbing Jig Or Mounting Frame

    Troubleshooting Repairs (cont.) 3. Open drain valve Note Ensure adequate ventilation in the DHW pipework. Open hot water draw-off point. Removing the boiler from the pre-plumbing jig or mounting frame Fig. 53 Note Danger Use new gaskets when assembling. Escaping gas leads to a risk of explosion. Check all connections on the gas side (also Internal gasket diameter: inside the appliance) for tightness.

  • Page 100: Checking The Temperature Sensors

    Troubleshooting Repairs (cont.) Checking the temperature sensors 6 5 4 3 2 1 6 5 4 3 2 1 Fig. 54 Heat generator circuit flow temperature sensor 3. Check the sensor resistance. Note position of (dual sensor) guide lug ■ Sensor 1: Connections 1 and 3 1.
  • Page 101 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 102: Information On Replacing The Hmu Heat Management Unit And Bcu Burner Control Unit

    "service assistant". Replacing the power cable When replacing the power cable, only use the power cable available as a spare part from Viessmann. Replacing the HMI connecting cable Please note Incorrect routing of the cable can lead to heat damage and impairment of the EMC properties.

  • Page 103: Checking The Plate Heat Exchanger

    Troubleshooting Repairs (cont.) Checking the plate heat exchanger 8. 3. Fig. 55 1. Drain the boiler on the heating water and DHW 6. Install in reverse order using new gaskets. sides. Torque for fixing screws 3.2 Nm 2. Move the programming unit to the service position. Danger Risk of electric shock from escaping heating 3.
  • Page 104 Troubleshooting Repairs (cont.) Fig. 56...

  • Page 105: Checking The Fuse

    Troubleshooting Repairs (cont.) Checking the fuse Fig. 57 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 106: Function Description Appliance Functions

    Function description Appliance functions Heating mode Weather-compensated operation: Heating circuit pump connection for heating circuit ■ The rooms are heated in accordance with the room without mixer temperature and time program settings. The control unit determines a set flow temperature Only for systems with several heating circuits.
  • Page 107 Function description Appliance functions (cont.) Note If heating circuits with mixer are present in the heating system: The flow temperature of the heat generator is one differential temperature higher than the flow tem- perature for the heating circuits with mixer. Differential temperature in delivered condition set to 8 K.

  • Page 108: Screed Drying

    Function description Appliance functions (cont.) Reduced room temperature Raising the flow temperature of the heating cir- cuits during operation with room temperature hook-up The higher the value, the greater the influence of the room temperature on the flow temperature of the heat- ing circuit.
  • Page 109 Function description Appliance functions (cont.) Note Note During screed drying, DHW heating is not available. Temperature profile 6 ends after 21 days. Observe EN 1264. The report to be provided by the The function continues after a power failure or after the heating contractor must contain the following details control unit has been switched off.

  • Page 110: Raising The Reduced Room Temperature

    Function description Appliance functions (cont.) Temperature profile 5 Days Fig. 66 Temperature profile 6 Days Fig. 67 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 111 Function description Appliance functions (cont.) Example using the settings in the delivered condition Outside temperature in °C Fig. 68 Heating curve for operation at standard room tem- perature or comfort room temperature Heating curve for operation at reduced room tem- perature Reducing the heat-up time The value and duration of the additional increase in the...

  • Page 112: Dhw Heating

    Function description Appliance functions (cont.) Example Time Fig. 69 Start of operation at standard room temperature or Set flow temperature in accordance with parame- comfort room temperature ter 424.3 Set flow temperature in accordance with the set Duration of operation with higher set flow tempera- heating curve ture in accordance with parameter 424.4: 60 min...

  • Page 113: Increased Dhw Hygiene

    Function description DHW heating (cont.) Increased DHW hygiene The DHW can be heated to a specified (higher) set Danger DHW temperature (approx. 65 °C) for a period of one Risk of injury due to increased DHW tempera- hour. ture. Inform the system user of the risk from the raised outlet temperature at the draw-off points.

  • Page 114: Connection And Wiring Dia-Hmu Heat Management Unit

    Connection and wiring diagram HMU heat management unit Fig. 70 A1 HMU heat management unit Outside temperature sensor (for weather-com- A2 HMI programming unit with RF module (wireless pensated operation) module) Cylinder temperature sensor A3 Switching mode power supply Power supply fÖ...

  • Page 115: Connection And Wiring Diagram

    Connection and wiring diagram HMU heat management unit (cont.) CAN bus P2 230 V output for circulation pump for heating cir- Floating input 230 V, output 230 V cuit without mixer Mains voltage output To BCU burner control unit P1 Cylinder loading pump To BCU burner control unit...

  • Page 116: Gram Bcu Burner Control Unit

    Connection and wiring diagram BCU burner control unit Fig. 71 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-Ö A Fan motor control Ionisation electrode Water pressure sensor Flue gas temperature sensor...

  • Page 117: Commissioning/Service

    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 118: Specification Specification

    Specification Specification Rated heating output range (details to EN 15502) = 50/30 °C (P(50/30)) Natural gas 1.9 - 11.0 1.9 - 19.0 1.9 - 25.0 1.9 - 32.0 2.5 - 11.0 2.5 - 19.0 2.5 - 25.0 2.5 - 32.0 = 80/60 °C (Pn(80/60)) Natural gas 1.7 - 10.1 1.7 - 17.4 1.7 - 22.9...
  • Page 119 Specification Specification (cont.) Rated heating output range (details to EN 15502) = 50/30 °C (P(50/30)) Natural gas 1.9 - 11.0 1.9 - 19.0 1.9 - 25.0 1.9 - 32.0 2.5 - 11.0 2.5 - 19.0 2.5 - 25.0 2.5 - 32.0 = 80/60 °C (Pn(80/60)) Natural gas 1.7 - 10.1 1.7 - 17.4 1.7 - 22.9...

  • Page 120: Flue System Types

    Specification Flue system types Available in the following countries Type of flue system AE, AM, AZ, BA, BG, BY, CH, CY, CZ, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, KG, KZ, LI, LT, LU, LV, MD, ME, MT, NL, NO, PL, PT, RO, RS, RU, SE, SK, TR, UA, UZ DE, SI...

  • Page 121: Disposal 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 122: Certificates Declaration Of Conformity

    Directive 2014/53/EU. Manufacturer's certificate according to the 1st BImSchV [Germany] We, Viessmann Werke GmbH & Co. KG, D-35107 Allendorf, confirm that the product Vitodens 222-W complies with the NO limits specified by the 1st BImSchV, paragraph 6 [Germany].

  • Page 123: Keyword Index

    Keyword index Keyword index Faults Angle of penetration........... 30 – Commissioning............47 – Display..............78 Filling function............ 41, 106 Back draught safety device........54 Fill water..............40 Boiler Flow pressure.............47 – DHW side, draining..........98 Flow temperature sensor......... 100 – Heating water side, draining........97 Flue gas temperature sensor........
  • Page 124 Keyword index Keyword index (cont.) Relay test..............76 Parameter Repairs...............97 – Automatic summer/wintertime changeover..... 65 Report...............117 – Burner hours until next service........66 Requirements.............30 – Calorific value, gas..........66 Room temperature hook-up........108 – Clear maintenance messages.........67 Runtime, DHW heating..........68 – Cylinder priority on heating circuit..... 70, 71 –...
  • Page 128 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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