Viessmann Vitodens 050-W Installation And Service Instructions Manual
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Viessmann Vitodens 050-W Installation And Service Instructions Manual

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Installation and service instructions
for contractors
Vitodens 050-W
Type B0HA, B0KA, BPKA, 3.2 to 25 kW
Wall mounted gas condensing boiler
Natural gas and LPG version
Type B0KA-M (for multiple connection), 7.0 to 25 kW
Wall mounted gas condensing boiler
Natural gas and LPG version
Gas Council No.
B0KA: 47-819-55, 47-819-57
■
■
B0KA-M: 47-819-56
VITODENS 050-W
6179762 GB
10/2022
VIESMANN
Please keep safe.

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Summary of Contents for Viessmann Vitodens 050-W

  • Page 1 VIESMANN Installation and service instructions for contractors Vitodens 050-W Type B0HA, B0KA, BPKA, 3.2 to 25 kW Wall mounted gas condensing boiler Natural gas and LPG version Type B0KA-M (for multiple connection), 7.0 to 25 kW Wall mounted gas condensing boiler Natural gas and LPG version Gas Council No.
  • 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 extract air to the outside can result in life threatening poisoning due to reverse flow of the flue gas. Fit an interlock circuit or take suita- ble steps to ensure an adequate supply of combustion air.

  • Page 6: Table Of Contents

    ■ System examples .................. 10 Maintenance parts and spare parts ............10 Viessmann Partnershop ..............10 ■ Viessmann spare part app ..............10 ■ 2. Preparing for installation ........................ 11 3. Installation sequence Removing the boiler from the packaging ..........15 Mounting the boiler and making connections ........
  • Page 7 Index Index (cont.) Removing the hydraulic unit ............... 80 ■ Checking the fuse ................81 ■ 8. Function description Appliance functions ................82 Heating mode ..................82 ■ OpenTherm controller ................. 82 ■ Venting program ................. 82 ■ Filling program ..................82 ■...

  • Page 8: Information Disposal Of Packaging

    Disposal of packaging Please dispose of packaging waste in line with statu- tory regulations. Gas Council No. Type Gas Council No.: Vitodens 050-W, B0KA, 25 kW 47-819-55 Vitodens 050-W, B0KA, 30 kW 47-819-57 Vitodens 050-W, B0KA-M, 30 kW 47-819-56 Symbols...

  • Page 9: Intended Use

    Information Intended use The appliance is intended solely for installation and Any usage beyond this must be approved by the man- operation in sealed unvented heating systems that ufacturer in each individual case. comply with EN 12828, with due attention paid to CECS215-2017 and the associated installation, serv- Incorrect usage or operation of the appliance (e.g.

  • Page 10: System Examples

    Maintenance parts and spare parts Maintenance parts and spare parts can be identified and ordered directly online. Viessmann Partnershop Login: https://shop.viessmann.com/ Viessmann spare part app www.viessmann.com/etapp...

  • Page 11: Preparing For Installation

    Preparing for installation Preparing for installation Ø 96 -0.5 Ø 60.5 +0.8 Fig. 2 Illustration shows a gas condensing combi boiler Condensate drain Cold water (gas condensing combi boiler) Heating flow Cylinder return (gas condensing system boiler) Heating return DHW (gas condensing combi boiler) Cylinder flow (gas condensing system boiler) Gas connection...
  • Page 12 Preparing for installation Preparing for installation (cont.) Filling/draining Dimension for siting with DHW cylinder below the boiler 1. Subject to order: Fit supplied pre-plumbing jig, 3. Prepare the gas connection according to TRGI or mounting frame or wall mounting bracket in the rel- TRF [or local regulations].
  • Page 13 Preparing for installation Preparing for installation (cont.) Shock arrestor If draw-off points likely to cause water hammer are connected to the boiler's DHW network (e.g. flush valves, washing machines, dishwashers): Shock arrestors should be installed close to the cause of the water hammer.
  • Page 14 Preparing for installation Preparing for installation (cont.) Ideal angle of penetration Fig. 5 WiFi router Heat generator Wall...

  • Page 15: Installation Sequence Removing The Boiler From The Packaging

    Installation sequence Removing the boiler from the packaging Fig. 6...

  • Page 16: Mounting The Boiler And Making Connections

    Installation sequence Mounting the boiler and making connections Removing the front panel Fig. 7 1. Unlock the front panel on the underside (push in), 2. Swivel the front panel forwards slightly and lift using a screwdriver or similar tool. away upwards. Mounting the boiler on the pre-plumbing jig or mounting frame Note Various installation components can be found in a sep-...
  • Page 17 Installation sequence Mounting the boiler and making connections (cont.) Fig. 8 Note 1. Replace gaskets. The diagram shows installation on a pre-plumbing jig for a gas condensing combi boiler. Internal gasket diameter: Gas connection Ø 18.5 mm ■ The boiler can be installed on the following accesso- Connections on the heating water side ■...

  • Page 18: Fitting The Boiler To The Wall Mounting Bracket

    Installation sequence Mounting the boiler and making connections (cont.) 3. Only remove the locking clip under the gas pipe 5. Tighten locking ring fittings so that they form a tight union nut once the appliance has been installed. seal: Clip is no longer required. 1 turn beyond finger-tight 4.
  • Page 19 Installation sequence Mounting the boiler and making connections (cont.) Fig. 9 1. Replace gaskets. Fit valves and gas shut-off valve. 3. Note Only remove the locking clip under the gas pipe Internal gasket diameter: union nut once the appliance has been installed. Gas connection Ø...

  • Page 20: Heating Water And Dhw Connections

    Installation sequence Mounting the boiler and making connections (cont.) 4. Tighten union nuts so that they form a tight seal. Tighten the union nuts as tightly as necessary and ensure that the components are undamaged and are functioning correctly throughout service life. Observe torque settings if a torque wrench is avail- able.

  • Page 21: Condensate Connection

    Installation sequence Condensate connection 1. Push the supplied drain hose on to the drain con- nector. 2. Connect the drain hose with a constant fall and a pipe vent to the drain network or a neutralising sys- tem. Note Route the onward drain line inside the building as far as possible.

  • Page 22: Flue Gas Connection

    Flue system installation instructions or Groppalli flue system" enclosed with the technical documentation may only be used in conjunction with the Viessmann flue system made by Skoberne or Groppalli. Connecting several Vitodens to a shared flue system If several Vitodens boilers are being connected to a...

  • Page 23: Electrical Connections

    Installation sequence Gas connection (cont.) 2. Check for leaks. 3. Purge the gas line. Danger Note Escaping gas leads to a risk of explosion. Operation with LPG: Check all connections on the gas side (also Install an external safety solenoid valve if the boiler is inside the appliance) for tightness.

  • Page 24: Overview Of Electrical Connections

    Installation sequence Electrical connections (cont.) Overview of electrical connections Note For further information on the connections, see the fol- lowing chapters. S.T.S O.T.S N 1 L N L L N N L N L N L 10 987654321 654321 654321 654321 35 54 X12 X5...

  • Page 25: On-Site Connections On The Hbmu Heat Management Unit

    Installation sequence Electrical connections (cont.) On-site connections on the HBMU heat management unit Open diaphragm grommets as required. Thread ■ through only one cable at a time without a plug. Ensure diaphragm grommets are airtight. If required, remove plug from cable. After threading the cable through, refit the plug with wire ferrules.

  • Page 26: Power Supply

    Installation sequence Electrical connections (cont.) Power supply Power supply If the power supply to the appliance is connected fÖ ■ with a flexible power cable, ensure that the live con- Danger ductors are pulled taut before the earth conductor in Incorrectly executed electrical installations can the event of strain relief failure.

  • Page 27: Closing The Wiring Chamber

    Installation sequence Closing the wiring chamber Fig. 19 Mounting the front panel Fig. 20...

  • Page 28: 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....................29 • • 2. Filling the heating system....................31 • • • 3. Checking all connections on the heating water and DHW sides for leaks....32 •...

  • Page 29: Commissioning The System

    Commissioning, inspection, maintenance Commissioning the system Please note Commissioning via software tool Only start the appliance with a fully filled trap. Check that the trap has been filled with water. Note Apps for commissioning and service are available for Commissioning via commissioning assistant iOS and Android devices.
  • Page 30 Commissioning, inspection, maintenance Commissioning the system (cont.) Commissioning assistant Explanations and references sequence "C.7" 4 - Weather-compensated Operating mode 13 - Constant operation with optional room thermostat 14 - OpenTherm 15 - Individual room control 16 - Individual room control with modulation Note Operating modes 15 and 16 can only be set via the software tool.

  • Page 31: Filling The Heating System

    Commissioning, inspection, maintenance Commissioning the system (cont.) Remove these 3 labels. Apply the labels in the follow- Switch on the WiFi connection. Establish a connection ing positions: to the router: ■ For commissioning, affix a label to the place marked ■...

  • Page 32: Checking All Connections On The Heating Water And Dhw Sides For Leaks

    Commissioning, inspection, maintenance Filling the heating system (cont.) 4. Fill the heating system at boiler drain & fill valve 6. Close the shut-off valves on the heating water side. in the heating return (on the connection set or on site). Minimum system pressure > 1.0 bar 7.

  • Page 33: Checking The Gas Type

    Commissioning, inspection, maintenance Venting the heating system (cont.) Activating the venting function If the venting function is to be activated after commis- 5. Use to select "C.2" for venting. sioning. 6. OK Tap the following buttons: should be used to select "ON" to switch on and OK simultaneously for approx.

  • Page 34: Checking The Static Pressure And Supply Pressure

    Commissioning, inspection, maintenance Removing the front panel (cont.) Fig. 23 Checking the static pressure and supply pressure Danger Note CO formation as a result of incorrect burner Operation with LPG: adjustment can have serious health implications. Purge the LPG tank twice on commissioning/replace- Always carry out a CO test before and after ment.
  • Page 35 Commissioning, inspection, maintenance Checking the static pressure and supply pressure (cont.) 01. Turn off the ON/OFF switch. 02. Close the gas shut-off valve. 03. Undo screw in the test connector on the gas solenoid valve, but do not remove it. Connect the pressure gauge.

  • Page 36: Function Sequence And Possible Faults

    Commissioning, inspection, maintenance Function sequence and possible faults Display Measure Control unit issues a heat Increase set value. Ensure demand heat transfer. Fan starts Fault 59, 457 Check the fan connecting ca- bles. Check the fan power supply. Ignition Fault 359 Check ignition module (con- trol voltage 230 V across plug "X1/54"...

  • Page 37: Setting The Maximum Heating Output

    Commissioning, inspection, maintenance Setting the maximum heating output A limit can be set on the maximum heating output for 3. OK heating mode. The limit is set via the modulation range. 4. Use to select "7" for max. heating output. Note 5.
  • Page 38 Commissioning, inspection, maintenance Adjusting the integral circulation pump rate (cont.) In the delivered condition, the minimum pump rate ■ and the maximum pump rate are set to the following values: Rated heating output Speed settings in the de- in kW livered condition in % Min.

  • Page 39: Checking The Balanced Flue System For Leaks (Annular Gap Test)

    For suitable Vitodens appliances, see pricelist. 80/125 mm ■ Minimum shaft cross-section – Square: 175 x 175 mm When connecting several Vitodens 050-W to a com- – Round: 195 mm mon flue system: Height between floors min. 2.5 m ■...

  • Page 40: Removing The Burner

    Commissioning, inspection, maintenance Removing the burner Danger Contact with live components can lead to seri- ous injury from electric current. Some compo- nents on PCBs remain live even after the power supply has been switched off. Do not touch the wiring chambers (control ■...

  • Page 41: Checking The Burner Gasket And Burner Gauze Assembly

    Commissioning, inspection, maintenance Checking the burner gasket and burner gauze assembly Fig. 29 Check burner gauze assembly , electrodes , ther- 7. Align the hole in burner gauze assembly with mal insulation ring and gasket for damage. Only the burner door pin. remove and replace components if they are damaged Secure burner gauze assembly and gasket...

  • Page 42: Checking And Adjusting The Ignition And Ionisation Electrodes

    Commissioning, inspection, maintenance Checking and adjusting the ignition and ionisation electrodes ±0.6 ±0.5 Fig. 30 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 43: Cleaning The Heating Surfaces

    Commissioning, inspection, maintenance Checking the back draught safety devices (cont.) Back draught safety device in the flue gas connec- 1. Remove the balanced flue system. tion Note If the balanced flue system cannot be removed, clean and check the back draught safety device via the inspection cover.
  • Page 44 Commissioning, inspection, maintenance Checking the condensate drain and cleaning the… (cont.) 4. Pull trap upwards out of the drain hose. 5. Hold trap as straight as possible and remove. Ensure that no condensate runs out. 6. Clean the trap. 7. Fill the trap with water and refit it on the drain hose. Please note If the trap is not filled with water, flue gas can escape.

  • Page 45: Installing The Burner

    Commissioning, inspection, maintenance Installing the burner Fig. 35 1. Insert the burner. Tighten screws diagonally. 3. Check the gas connections for leaks. Tighten screws as tightly as necessary and ensure that the components are undamaged and are func- Danger tioning correctly throughout service life. Escaping gas leads to a risk of explosion.

  • Page 46: Checking The Flow Limiter (Only For Gas Condensing Combi Boiler)

    Commissioning, inspection, maintenance Checking the flow limiter (only for gas condensing combi boiler) 1. Drain the boiler on the DHW side. 2. Remove the spring clip. 3. Remove the DHW flow sensor. 4. Check flow limiter and filter strainer . Replace if scaled or damaged.

  • Page 47: 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 48: Fitting The Front Panel

    Commissioning, inspection, maintenance Checking all gas equipment for leaks at… (cont.) Note Only use suitable and approved leak detection agents (EN 14291) and devices for the tightness test. Leak detection agents with unsuitable constituents (e.g. nitrides, sulphides) can cause material damage. Remove residues of the leak detection agent after test- ing.

  • Page 49: Checking The Flue System For Unrestricted Flow And Leaks

    Commissioning, inspection, maintenance Checking the combustion quality (cont.) Fig. 38 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 50: Matching The Control Unit To The Heating System

    Commissioning, inspection, maintenance Matching the control unit to the heating system The control unit must be matched to the system equip- Accessory installation instructions ment level. Set the parameters according to the accessories fitted: Adjusting the heating curve Tap the following buttons: 4.

  • Page 51: System Configuration Calling Up Parameters

    System configuration (parameters) Calling up parameters Note 3. OK The display and setting of some parameters is dependent on: 4. Use to select the parameter for adjust- ■ Heat generator ment. See tables below. ■ Connected accessories and the functions associated with them 5.

  • Page 52: Energy Saving Functions (Setting Only Via Software Tool)

    System configuration (parameters) Parameters (cont.) 6 "Minimum heating output" Setting Explanations A limit can be set on the minimum heating output for heating mode. Delivered condition specified by settings specific to the appliance 0 to 100 Adjustable from 0 to 100 % 7 "Maximum heating output"...
  • Page 53 System configuration (parameters) Parameters (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 outside tem- perature is 1 K above selected value. Heating circuit pump switches back on when outside temperature is 1 K below selected value.

  • Page 54: 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 the service menu and OK simultaneously for approx. 4 s, then release. 2. Select the required menu section (e.g. "b.1" Con- nect with software tool).
  • Page 55 Diagnosis and service checks Diagnosis (cont.) Operating data on heating circuits with mixer can only 2. Use to select "b.3" for diagnostics. be called up if such components are installed in the system. 3. OK Note 4. Use to select the required entry. If a called up sensor is faulty, "- - -"...

  • Page 56: Troubleshooting Fault Display On The Programming Unit

    Troubleshooting Fault display on the programming unit The display shows " " in the event of a fault. to select "Er". Note 3. OK If a central fault message facility is connected, this is switched on. to call up fault entry "E.1 to E.5". Calling up fault messages 5.

  • Page 57: Overview Of Electronics Modules

    Troubleshooting Overview of electronics modules Fig. 39 HBMU heat management unit Programming unit with TCU 100 communication module Fault messages Note For diagnostics and troubleshooting, see chapter "Repairs". Fault messages dependent on appliance equipment level...
  • Page 58 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code No DHW heating Lead break, cylinder tem- Check DHW setting in the com- ■ perature sensor missioning assistant and correct if necessary. Check the cylinder temperature ■ sensor (terminal S.T.S). Measure voltage at sensor input ■...
  • Page 59 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code 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 60 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code 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 solenoid valve: In the ■...
  • Page 61 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code Normal operation Communication between Check cables and plug-in connec- heat management unit tions between central control unit and programming unit dis- and programming unit. rupted/interrupted. Check cables for correct routing/ position.
  • Page 62 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code Burner in a fault state Short circuit, flow temper- Check the flow temperature sen- ature sensor/high limit sor/high limit safety cut-out. safety cut-out Check sensor lead. Replace faulty component if necessary. Reset the appliance.
  • Page 63 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code Burner in a fault state Combustion CO limit ex- Check entire flue gas path for the ceeded following: Leaks ■ Flue gas back pressure caused ■ by water pocket (if flue system fall is insufficient) Constrictions ■...
  • Page 64 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code 366, 367 Burner in a fault state Gas valve power supply Replace the HBMU heat manage- does not turn off. ment unit. See chapter "Replacing the HBMU heat management unit". Burner in a fault state Flame is lost immediately Check gas supply (gas pressure...
  • Page 65 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code 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 66 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code Burner restarts. Performing ionisation cur- Check ionisation electrode and ■ rent calibration: Calibra- connecting cable. tion not performed. Mini- Check plug-in connections for ■ mum value or termination loose contacts. Check the flue criterion not reached.
  • Page 67 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code Burner in a fault state Post-processing of ionisa- Check gas type setting. If the fault tion current calibration: occurs repeatedly, replace the Stabilisation conditions for HBMU heat management unit. See post-calibration not met chapter "Replacing the HBMU heat management unit".
  • Page 68 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code Burner in a fault state HBMU heat management Replace the HBMU heat manage- unit faulty ment unit. See chapter "Replacing the HBMU heat management unit". Reset the appliance. Burner in a fault state Ionisation current earth Check ionisation electrode and fault, HBMU heat man-...
  • Page 69 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code Burner in a fault state Ionisation electrode earth Check IO electrode for earth fault. fault, HBMU heat man- If the fault persists, replace the agement unit faulty HBMU heat management unit. See chapter "Replacing the HBMU heat management unit".
  • Page 70 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code Burner in a fault state Incorrect reset sequence. Check connections between HBMU heat management unit and HMI programming unit. Reset the appliance. Burner in a fault state Flue gas damper fault. Check flue gas damper.
  • Page 71 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code 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 72 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code Burner in a fault state Ionisation current too high Check gap between ionisation during calibration electrode and burner gauze as- sembly. Check whether there is a lot of dust in the ventilation air (e.g. from construction work).
  • Page 73 Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code Normal operation without Lead break, room temper- Check external room temperature room influence ature sensor, heating cir- sensor for heating circuit or room cuit 1 temperature sensor on remote control unit.

  • Page 74: Repairs

    Troubleshooting Fault messages (cont.) Displayed fault System characteristics Cause Measures code No DHW heating Water flow rate below min- Check that the cylinder flow and imum level return are open. Check DHW setting in commis- sioning assistant and correct if necessary.

  • Page 75: Removing The Boiler From The Pre-Plumbing Jig Or Mounting Frame

    Troubleshooting Repairs (cont.) Removing the boiler from the pre-plumbing jig or mounting frame Fig. 40 Note Note When assembling, use new gaskets and, if required, When carrying out any work on gas connection fittings, new locking ring fittings. hold with a suitable tool. Never transfer any forces to the internal components.

  • Page 76: Checking The Temperature Sensors

    Troubleshooting Repairs (cont.) Checking the temperature sensors Fig. 41 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. Check the leads and plugs of flow temperature Sensor 2: Connections 2 and 4 ■...
  • Page 77 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 the cylinder temperature sensor sensor or outlet temperature sensor. 2. Disconnect leads, flue gas temperature sensor 2.

  • Page 78: Replacing The Hbmu Heat Management Unit

    "ViGuide" must be used. Replacing the power cable When replacing the power cable, only use the power cable available as an individual 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 79: Checking The Plate Heat Exchanger

    Troubleshooting Repairs (cont.) Checking the plate heat exchanger Fig. 42 Heating water flow Cold water Heating water return 1. Shut off and drain the boiler on the heating water 7. Install plate heat exchanger in reverse order using and DHW sides. new gaskets.

  • Page 80: Removing The Hydraulic Unit

    Troubleshooting Repairs (cont.) Removing the hydraulic unit If components of the hydraulic unit have to be replaced. Danger Risk of electric shock from escaping heating water or DHW After installation, check all connections on the water side for leaks. Fig. 43...

  • Page 81: Checking The Fuse

    Troubleshooting Repairs (cont.) Checking the fuse Fig. 44 1. Turn off the ON/OFF switch 5. Check fuse F1 (see connection and wiring dia- gram). 2. Remove the programming unit. Danger 3. Pivot the HBMU heat management unit down. Incorrect or improperly fitted fuses can lead to an increased risk of fire.

  • Page 82: Function Description Appliance Functions

    Function description Appliance functions Heating mode Weather-compensated operation: Constant operation without room thermostat: ■ ■ The rooms are heated in accordance with the room The rooms are heated according to the set flow tem- temperature settings. perature settings. The control unit determines a set flow temperature ■...
  • Page 83 Function description Appliance functions (cont.) Slope -5 -10 -15 -20 Outside temperature in °C Fig. 45 Slope setting ranges: Changing the set room temperature ■ Underfloor heating systems: 0.2 to 0.8 ■ Low temperature heating systems: 0.8 to 1.6 Operating instructions Set room temperature Changing the slope and level Standard room temperature...

  • Page 84: Dhw Heating (System Boilers Only)

    Function description DHW heating (system boilers only) The burner, the circulation pump and the 3-way Danger diverter valve are started or changed over if the cylin- Risk of injury due to increased DHW tempera- der temperature lies 2.5 K below the set cylinder tem- ture.

  • Page 85: Connection And Wiring Dia-Hbmu Heat Management Unit

    Connection and wiring diagram HBMU heat management unit Fig. 48 A1 HBMU heat management unit Fan motor control A2 Power supply unit Outlet temperature sensor (combi boiler only) X... Electrical interfaces 230 V connection accessories for accessories Power supply 230 V/50 Hz 230 V fan motor a-Ö...
  • Page 86 Connection and wiring diagram HBMU heat management unit (cont.) Mains input fÖ No function...

  • Page 87: Gram Hbmu Heat Management Unit

    Connection and wiring diagram HBMU heat management unit Fig. 49 A1 HBMU heat management unit Water pressure sensor A3 Programming unit with communication module Flue gas temperature sensor X... Electrical interfaces Boiler water temperature sensor Flow sensor (combi boiler only) Internal circulation pump (PWM)
  • Page 88 Connection and wiring diagram HBMU heat management unit (cont.) Stepper motor for diverter valve Remote control (OpenTherm controller) Outside temperature sensor Cylinder temperature sensor (system boiler only)

  • Page 89: Commissioning/Service

    Commissioning/service reports (cont.) 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) With natural gas ..mbar See table "Supply pressure" With LPG ..mbar (Commis- sioning ...)

  • Page 90: Specification Gas Condensing System Boiler

    Specification Gas condensing system boiler Gas boiler, type B and C, category I Type B0HA Rated heating output range (details to EN 15502) = 50/30 °C Natural gas 3.2 to 19.0 3.2 to 25.0 3.2 to 19.0 3.2 to 25.0 = 80/60 °C Natural gas 2.9 to 17.0...
  • Page 91 Specification Gas condensing system boiler (cont.) Gas boiler, type B and C, category I Type B0HA Rated heating output range (details to EN 15502) = 50/30 °C Natural gas 3.2 to 19.0 3.2 to 25.0 3.2 to 19.0 3.2 to 25.0 = 80/60 °C Natural gas 2.9 to 17.0...
  • Page 92 Specification Gas condensing system boiler (cont.) Gas boiler, type B and C, category I Type B0HA Rated heating output range (details to EN 15502) = 50/30 °C Natural gas 3.2 to 19.0 3.2 to 25.0 3.2 to 19.0 3.2 to 25.0 = 80/60 °C Natural gas 2.9 to 17.0...

  • Page 93: Gas Condensing Combi Boiler

    Specification Gas condensing combi boiler Gas boiler, type B and C, category I Type B0KA, BPKA Rated heating output range (details to EN 15502) = 50/30 °C Natural gas 3.2 (7.0 ) to 19.0 3.2 (7.0 ) to 25.0 3.2 to 19 3.2 to 25 = 80/60 °C Natural gas...
  • Page 94 Specification Gas condensing combi boiler (cont.) Gas boiler, type B and C, category I Type B0KA, BPKA Rated heating output range (details to EN 15502) = 50/30 °C Natural gas 3.2 (7.0 ) to 19.0 3.2 (7.0 ) to 25.0 3.2 to 19 3.2 to 25 = 80/60 °C...
  • Page 95 Specification Gas condensing combi boiler (cont.) Gas boiler, type B and C, category I Type B0KA, BPKA Rated heating output range (details to EN 15502) = 50/30 °C Natural gas 3.2 (7.0 ) to 19.0 3.2 (7.0 ) to 25.0 3.2 to 19 3.2 to 25 = 80/60 °C...

  • Page 96: Electronic Combustion Control Unit

    Specification (cont.) Flue system types Available in the following countries Flue system types AE, AM, AT, AZ, BA, BG, BY, CH, CY, CZ, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, KG, KZ, LT, LV, MD, (10)3 ME, MT, NL, NO, PL, PT, RO, RS, RU, SE, SK, TR, UA, AU, BE, NZ...

  • Page 97: Disposal Final Decommissioning And Disposal

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

  • Page 98: Certificates Declaration Of Conformity

    Certificates Declaration of conformity We, Viessmann Limited, Hortenwood 30, Telford TF1 7YP, United Kingdom, declare as authorised rep- resentative of the manufacturer and in sole responsibil- ity for the manufacturer, that the named product com- plies with the applicable UK regulations in terms of its design and operational characteristics.

  • Page 99: Keyword Index

    Keyword index Keyword index Front panel removal..........16, 33 Angle of penetration........... 13 Function descriptions..........82 Function sequence.............36 Fuse................81 Back draught safety device........42 Boiler, fitting............16, 18 Boiler, removing............75 Gas connection............22 Boiler water temperature sensor........ 76 Gas solenoid valve.............35 Burner, removal............40 Gas supply pressure..........
  • Page 100 Wiring diagram............85 Seal rings, replacing...........32 Security parameters........... 13 Service menu............. 54 – Calling up..............54 – Exiting..............54 Viessmann Climate Solutions SE Viessmann Limited 35108 Allendorf / Germany Hortonwood 30, Telford Telephone: +49 6452 70-0 Shropshire, TF1 7YP, GB...

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