Viessmann B2TF Installation And Service Instructions Manual
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Viessmann B2TF Installation And Service Instructions Manual

Gas condensing storage combi boiler with 7 inch colour touchscreen
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VIESMANN
Installation and service instructions
for contractors
Vitodens 222-F
Type B2TF, 1.9 to 32 kW
Gas condensing storage combi boiler with 7 inch colour touchscreen
Natural gas and LPG version
VITODENS 222-F
Please keep safe.
6151778 GB
5/2020

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Summary of Contents for Viessmann B2TF

  • Page 1 VIESMANN Installation and service instructions for contractors Vitodens 222-F Type B2TF, 1.9 to 32 kW Gas condensing storage combi boiler with 7 inch colour touchscreen Natural gas and LPG version VITODENS 222-F Please keep safe. 6151778 GB 5/2020...
  • Page 2 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 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 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 1. Information Disposal of packaging ................Symbols ....................Intended use ..................Product information ................Vitodens 222-F, type B2TF ..............■ System examples .................. Spare parts lists ..................2. Preparing for installation Handling ....................10 Siting in recesses ................... 10 Relocating the ON/OFF switch and electrical connections (if neces- sary) .......................
  • Page 7 Index Index (cont.) Further messages .................. 95 Service messages ................95 ■ Status messages ................95 ■ Warning messages ................95 ■ Information ..................96 ■ Repairs ....................96 Shutting down the boiler ..............96 ■ Draining the boiler on the heating water side ........97 ■...
  • Page 8 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 (e.g. if the flue gas and ventilation air paths are sealed). Product information Vitodens 222-F, type B2TF Gas condensing storage combi boiler with Inox-Radial The selected gas category in the delivered condition heat exchanger and the following integrated compo-...

  • Page 10: 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 11: Preparing For Boiler Installation

    Preparing for installation Relocating the ON/OFF switch and electrical… (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.
  • Page 12 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 13 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 14: 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 15: Siting The Boiler

    Installation sequence Siting the boiler Fig. 5 Type plate Note Attaching the additional type plate The type plate is attached to cover panel in the appliance. See page 39. 1. Take the additional type plate from the documenta- Additional type plate with access code (QR code) tion supplied with the boiler.

  • Page 16: Removing The Front Panel

    Installation sequence Siting the boiler (cont.) 2. In consultation with the system user, affix the addi- tional type plate to the outside of the appliance. The additional type plate must be visible to the flue gas inspector. Affix another QR code to the installation and serv- ice instructions.

  • Page 17: Connections On The Heating Water And Dhw Sides

    Installation sequence 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 DHW circulation R (separate accessories) ½...

  • Page 18: Flue Gas Connection

    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. Connecting several Vitodens to a shared flue sys- Installation instructions for back draught safety...

  • Page 19: 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 20: 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 21: On-Site Connections To The 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 Note on connecting accessories in the delivered condition) When connecting accessories observe the sep-...

  • Page 22: 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 23: 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 24 Installation sequence Electrical connections (cont.) Power supply and PlusBus connection of accessories Power supply of all accessories at the HMU heat management unit Fig. 18 Some accessories with direct power supply Fig. 19 HMU heat management unit, heat generator ON/OFF switch Mixer extension kit (ADIO electronics module) Mains input fÖ...

  • Page 25: 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 26: Routing Connecting Cables/Leads

    Installation sequence Electrical connections (cont.) Depending on the angle of penetration, the effective Ideal angle of penetration wall thickness changes and so does the extent to which the electromagnetic waves are damped. Flat (unfavourable) angle of penetration Fig. 21 WiFi router Fig.

  • Page 27: Fitting The Front Panel And Programming Unit

    Installation sequence Fitting the front panel and programming unit Fig. 23 Lightguide at the bottom...

  • Page 28: 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....................30 • 2. Moving the programming unit to the maintenance position.......... 30 • 3. Commissioning the system....................30 •...
  • Page 29 Commissioning, inspection, maintenance Steps - commissioning, inspection and… (cont.) Commissioning steps Inspection steps Maintenance steps Page • 40. Matching the control unit to the heating system............57 • 41. Adjusting the heating curves.................... 57 • 42. Calling up and resetting the maintenance display............57 •...
  • Page 30 Commissioning, inspection, maintenance Removing the front panels See page 16, 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 31 Commissioning, inspection, maintenance Commissioning the system (cont.) Commissioning assistant Explanations and references sequence Commissioning Language With programming unit If commissioning is to be carried out at the programming unit of the heat gen- erator. With software tool The appliance automatically switches on the WiFi access point. Further commissioning steps according to the instructions of the software tool used (e.g.
  • Page 32 Commissioning, inspection, maintenance Commissioning the system (cont.) Commissioning assistant Explanations and references sequence Heating circuit 2, 3 ... Heating circuits with mixer or heating circuits with mixer with external hook-up (if installed) Settings for DHW heating according to the system components Not available System without DHW heating ■...
  • Page 33 Commissioning, inspection, maintenance Commissioning the system (cont.) Commissioning assistant Explanations and references sequence Floating contact: Function If a contact has been connected to plug 96 of the HMU heat management selection plug 96 unit. No function ■ External demand, DHW Pushbutton function, DHW circulation pump runs for 5 min.
  • Page 34 Commissioning, inspection, maintenance Commissioning the system (cont.) Tap the following buttons: 2. "Service" 3. Enter password "viservice". 4. Confirm with Fig. 25 5. "Commissioning" Affix a label in the operating instructions. Calling up the commissioning assistant at a later point If you need to continue commissioning later, the com- missioning assistant can be reactivated at any time.
  • Page 35 Commissioning, inspection, maintenance Filling the heating system (cont.) Fig. 26 Shown with the connections at the top 1. Check the pre-charge pressure of the expansion 6. Activate the filling function (see commissioning vessel. assistant or following chapter). 2. Close the gas shut-off valve. 7.
  • Page 36 Commissioning, inspection, maintenance Venting the boiler Please note 3. Close air vent valve and fill valve . At the To prevent appliance damage, same time, adjust operating pressure 1.0 bar > Do not vent the boiler via the safety valve on the (0.1 MPa).
  • Page 37 Commissioning, inspection, maintenance Venting the heating system (cont.) 7. Activate the venting function with The display shows the system pressure. The venting function ends automatically after 20 min or when you tap Filling the DHW cylinder on the DHW side 1.
  • Page 38 Commissioning, inspection, maintenance Entering contact details of heating contractor (cont.) 4. Fill in the fields and confirm each with Checking the gas type The boiler is equipped with an electronic combustion 1. Determine the gas type and Wobbe index by ask- controller that adjusts the burner for optimum combus- ing your local gas supply utility or LPG supplier.
  • Page 39 Commissioning, inspection, maintenance Checking the static pressure and supply pressure Fig. 29 Cover panel Test connector Type plate 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.
  • Page 40 Commissioning, inspection, maintenance Checking the static pressure and supply pressure (cont.) Supply pressure (flow pressure) Measures For natural gas For LPG < 20 mbar (2.0 kPa) < 50 mbar (5.0 kPa) Do not start the boiler. Notify the gas supply utility or LPG supplier.
  • Page 41 Commissioning, inspection, maintenance Function sequence and possible faults (cont.) Automatic calibration of Fault F.62, F.373 Ensure adequate heat trans- the combustion controller fer. Reset device. Fault F.346, F.377 Check gap between ionisa- tion electrode and burner gauze assembly. Check flue system. Remove flue gas recirculation if re- quired.
  • Page 42 Commissioning, inspection, maintenance Adjusting pump rate of integral circulation pump The pump speed and consequently the pump rate are Setting (%) in the heating circuit 1 group: regulated subject to the outside temperature and the ■ Min. speed: Parameter 1102.0 switching times for heating mode or reduced mode.
  • Page 43 Commissioning, inspection, maintenance Adjusting pump rate of integral circulation pump (cont.) Curve Pump rate, circulation pump 10 % 20 % 30 % 40 % 50 % 60 % 70 % 80 % 90 % 100 % Checking the balanced flue system for leaks (annular gap check) Fig.
  • Page 44 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 45 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 46 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 47 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 48 Commissioning, inspection, maintenance Checking the condensate drain and cleaning the… (cont.) Fig. 39 1. Pivot the HMU heat management unit forwards. 8. Check that connections on the trap and the heat exchanger are seated correctly. 2. Undo the hose retainer. Remove the supply hose. Note Please note Route the drain hose without any bends and with a...
  • Page 49 Commissioning, inspection, maintenance Installing the burner Fig. 40 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 50 Commissioning, inspection, maintenance Checking anode connection and anode earth current with 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 51 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 52 Commissioning, inspection, maintenance Cleaning the loading cylinder (cont.) Fig. 43 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 53 Commissioning, inspection, maintenance Re-assembling and filling the loading cylinder Fig. 44 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 54 Commissioning, inspection, maintenance Checking the diaphragm expansion vessel and system pressure Fig. 45 Diaphragm expansion vessel valve 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 55 Commissioning, inspection, maintenance Checking pre-charge pressure and DHW expansion vessel (if installed) 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. Close the on-site shut-off valve in the cold water line.
  • Page 56 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 57 Commissioning, inspection, maintenance Checking the combustion quality (cont.) 07. " "Select "Primary circuit pump, set speed" and 10. Set the upper heating output: adjust the set value to the maximum value. Select "Maximum heating output". The burner now operates at the upper heating out- 08.
  • Page 58 Commissioning, inspection, maintenance Calling up and resetting the maintenance display (cont.) 5. "System configuration" 7. Select parameter 1411.0 "Clear maintenance messages" and "ON". 6. "Boiler" Note The selected service parameters for hours run and time intervals restart at 0. Fitting the front panel Fig.

  • Page 59: Calling Up Parameters

    System configuration (parameters) Calling up parameters Parameters are split into the following groups: Tap the following buttons: ■ – "General" – "Boiler" 1. " " – "DHW" – "Heating circuit 1/2/3/4" 2. "Service" Heating systems with one heating circuit without ■...
  • Page 60 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 61: 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 62 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 63 System configuration (parameters) Boiler (cont.) 1432.1 "Residual head control of primary circuit pump" Setting Explanations Residual head limit value for reducing pump speed of the internal circulation pump, in mbar Internal circulation pump is controlled in line with the outside temperature 1 to 255 Internal circulation pump is operated with constant re- sidual head.

  • Page 64: Dhw

    System configuration (parameters) Note Parameter values in bold are factory settings. 497.0 " Operating mode of DHW circulation pump" Setting Explanations DHW circulation pump: Time program Selected cycle (see parameter 497.3) 497.1 "DHW circulation pump for auxiliary function DHW heating" Setting Explanations DHW circulation pump:...

  • Page 65: Heating Circuit 1, Heating Circuit 2, Heating Circuit 3, Heating Circuit 4

    System configuration (parameters) (cont.) 1101.2 "Set speed of the primary circuit pump for DHW heating" Setting Explanations Set speed of the internal circulation pump when oper- ated as a circulation pump for cylinder heating Delivered condition specified by settings specific to the appliance 20 to 100 Set speed adjustable from 20 to 100 %...
  • Page 66 System configuration (parameters) Heating circuit 1, Heating circuit 2, Heating… (cont.) 426.4 "Duration for set flow temperature increase, heating circuit 2" 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 428.3 "Set flow temperature increased when switching from operation with reduced room temperature to...
  • Page 67 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 68 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 69 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 70: Subscriber Numbers Of Connected Extensions

    System configuration (parameters) Heating circuit 1, Heating circuit 2, Heating… (cont.) 1395.1 "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 71 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 72: Service Menu

    Diagnosis and service checks Service menu Service menu Calling up the service menu Service menu overview Tap the following buttons: Service Diagnosis 1. " " General 2. "Service" Burner Heating circuit 1 3. Enter password "viservice". Heating circuit 2 4. Use to confirm.

  • Page 73: Resetting All Passwords To Delivered Condition

    09. Enter new password. 10. Confirm twice with Resetting all passwords to delivered condition Tap the following buttons: 5. Use to confirm. 1. Request master password from the Viessmann 6. "Change passwords" Technical Service. 7. "Reset all passwords" 2. " "...

  • Page 74: Checking Outputs (Actuator Test)

    Diagnosis and service checks Calling up messages (message history) (cont.) 5. "Message history" "Faults" to call up saved fault messages. For ■ further details, see the following chapter "Fault The following is displayed in the message lists: messages". ■ Date and time of the occurrence of the notifica- ■...
  • Page 75 Diagnosis and service checks Checking outputs (actuator test) (cont.) The following actuator functions can be controlled subject to the system equipment level: Display Explanation Gas condensing boiler group Fan speed Set value Burner fan speed in rpm (rotations/minute) Burner modulation, set Modulation level (in accordance with specific heat generator settings) ■...
  • Page 76 Diagnosis and service checks Checking outputs (actuator test) (cont.) Display Explanation Solar circuit pump, set Set value Speed, solar circuit pump in % speed Circulation pump hy- giene function Circulation pump, solar 3-way valve, solar Open Target position Close Stop...

  • Page 77: Fault Display On The Programming Unit

    Troubleshooting Fault display on the programming unit If there is a fault, the display shows the fault message The following is displayed: plus ■ Date and time of the occurrence of the fault ■ Fault code Note ■ Description of the fault If a central fault message facility is connected, this is ■...

  • Page 78: Overview Of Electronics Modules

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

  • Page 79: Fault Messages

    Troubleshooting Fault messages Note For diagnosis and troubleshooting, see chapter "Repairs". Fault messages dependent on appliance equipment 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 80 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 81 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 82 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 83 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 84 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 recurs, replace BCU burner control unit: See page 100. F.182 No DHW heating Short circuit, outlet tem- Check outlet temperature sensor perature sensor (if instal-...
  • Page 85 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 86 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 87 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.369 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 88 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.377 Burner in a fault state Post-processing ionisation Check gas type setting. If fault re- current calibration: Stabili- curs, replace BCU burner control sation conditions for post- unit: See page 100. calibration not reached Reset the appliance.
  • Page 89 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.386 Burner in a fault state BCU burner control unit Replace BCU burner control unit: faulty See page 100. Reset the appliance. F.387 Burner in a fault state Earth fault, ionisation cur- Check ionisation electrode and rent.
  • Page 90 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code F.425 System in control mode, cal- Time synchronisation Set the time. If external time is culation out of operation failed used, check parameters 1504 and 508. F.430 Control mode operation in Communication error, Check gateway module connecting line with set values of heat...
  • Page 91 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 92 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 93 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 94 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 95: Further Messages

    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 96: Information

    Troubleshooting Further messages (cont.) Messages on the Meaning Measure display A.20 Service interval could not be activated. Check the time and date settings. A.21 System pressure has exceeded maximum Check the safety valve and diaphragm ex- pressure. pansion vessel. On combi boilers: Check the plate heat ex- changer.

  • Page 97: Draining The Boiler On The Heating Water Side

    Troubleshooting Repairs (cont.) Draining the boiler on the heating water side Fig. 51 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 98: 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. 52 Heat generator circuit flow temperature sensor 3. Check the sensor resistance. Note position of (dual sensor) guide lug ■...
  • Page 99 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 100: 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 101: Checking The Plate Heat Exchanger

    Troubleshooting Repairs (cont.) Checking the plate heat exchanger 8. 3. Fig. 53 1. Drain the boiler: 5. Check the connections on the heating water and On the heating water side, see page 97 DHW sides for contamination and scaling; replace ■...

  • Page 102: Removing The Hydraulic Unit And Return Pipe

    Troubleshooting Repairs (cont.) Removing the hydraulic unit and return pipe If components of the hydraulic unit have to be replaced. 2. 3x Fig. 54...

  • Page 103: Replacing The Power Cable

    Repairs (cont.) Remove the return pipe: Fig. 55 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 104: Checking The Fuse

    Troubleshooting Repairs (cont.) Checking the fuse Fig. 56 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 105: Function Description 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 106 Function description Control functions (cont.) Slope -5 -10 -15 -20 Outside temperature in °C Fig. 57 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 107: Screed Drying

    Function description Control functions (cont.) Room influence factor parameter Heating circuit Parameter 1 (without mixer) 933.7 (only set if just one heating circuit is installed) 2 (with mixer) 934.7 3 (with mixer) 935.7 (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:...
  • Page 108 Function description Control functions (cont.) Parameter 897.0 "Screed drying": Temperature profile 1 (EN 1264-4) Days Fig. 61 Temperature profile 2 (ZV parquet and flooring technology) Days Fig. 62 Temperature profile 3 Days Fig. 63 Temperature profile 4 Days Fig. 64 Temperature profile 5 Days Fig.

  • Page 109: Raising The Reduced Room Temperature

    Function description Control functions (cont.) Temperature profile 6 Days Fig. 66 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 110: 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 111: 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 112: Connection And Wiring Dia-Hmu Heat Management Unit

    Connection and wiring diagram HMU heat management unit Fig. 69 A1 HMU heat management unit Cylinder temperature sensor A2 HMI programming unit with RF module (TCU 200) fÖ Power supply A3 Power supply unit PlusBus X... Electrical interfaces CAN bus Outside temperature sensor Floating input 230 V, output 230 V...
  • Page 113 Connection and wiring diagram HMU heat management unit (cont.) Mains voltage output To BCU burner control unit P1 Cylinder loading pump To BCU burner control unit P2 Parametrisable output for: ■ DHW circulation pump Circulation pump for heating circuit without ■...

  • Page 114: Gram Bcu Burner Control Unit

    Connection and wiring diagram BCU burner control unit Fig. 70 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 115: 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 116: Specification Specification

    Specification Specification Gas boiler, type B and C, category II 2N3P Type B2TF Rated heating output range (details to EN 15502) = 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...
  • Page 117 Specification Specification (cont.) Gas boiler, type B and C, category II 2N3P Type B2TF Rated heating output range (details to EN 15502) = 50/30 °C (P(50/30)) Natural gas 1.9 - 19 1.9 - 25 1.9 - 32 2.5 - 19 2.5 - 25...
  • Page 118 Specification Specification (cont.) Gas boiler, type B and C, category II 2N3P Type B2TF Rated heating output range (details to EN 15502) = 50/30 °C (P(50/30)) Natural gas 1.9 - 19 1.9 - 25 1.9 - 32 2.5 - 19 2.5 - 25...

  • Page 119: Flue System Types

    Specification Specification (cont.) Gas boiler, type B and C, category II 2N3P Type B2TF Rated heating output range (details to EN 15502) = 50/30 °C (P(50/30)) Natural gas 1.9 - 19 1.9 - 25 1.9 - 32 2.5 - 19 2.5 - 25...

  • Page 120: Electronic Combustion Control Unit

    Specification Electronic combustion control unit The electronic combustion controller utilises the physi- To achieve optimum combustion control, the system cal correlation between the level of the ionisation cur- regularly carries out an automatic self-calibration; also rent and the air ratio .

  • 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

    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 123: Keyword Index

    Keyword index Keyword index Flue gas temperature sensor........99 Angle of penetration........... 25 Function descriptions..........105 Fuse................. 104 Back draught safety device........46 Boiler, draining on the DHW side....... 50 Gas supply pressure..........39 Boiler water temperature sensor........ 98 Gas train ..............39 Burner control unit............
  • Page 124 Keyword index Keyword index (cont.) Range of WiFi connections........25 Parameter Reduced set room temperature....... 106 – Automatic summer/wintertime changeover..... 60 Reducing heat-up output..........109 – Burner hours until next service........61 Reducing heat-up time..........110 – Calorific value, gas..........61 Relay test..............74 –...
  • 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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Vitodens 222-f

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