Yes, the Viessmann 050-W B0HA can be installed in Germany. The manual includes German contact information, indicating suitability for the German market.

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Summary of Contents for Viessmann Vitodens 050-W B0HA

Page 1 VIESMANN Installation and service instructions for contractors Vitodens 050-W Type B0HA, B0KA, 3.2 to 32 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 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 Prior to commencing work, touch For installation and replacements, earthed objects such as heating or use only Viessmann original parts water pipes to discharge static or parts approved by Viessmann. loads. Repair work...
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
■ System examples .................. 12 Maintenance parts and spare parts ............12 Viessmann Partnershop ..............13 ■ Viessmann spare part app ..............13 ■ 2. Preparing for installation ........................ 14 3. Installation sequence Removing the boiler from the packaging ..........19 Mounting the boiler and making connections ........
Page 7 Index Index 14 ......................64 ■ 49 ......................64 ■ 50 ......................64 ■ 57 ......................65 ■ 58 ......................65 ■ 59 ......................65 ■ 62 ......................65 ■ 63 ......................65 ■ 64 ......................66 ■ 67 ......................66 ■...
Page 8: Index Index
Index Index 381 ...................... 78 ■ 382 ...................... 78 ■ 383, 384 ....................78 ■ 385 ...................... 78 ■ 386 ...................... 79 ■ 387 ...................... 79 ■ 388 ...................... 79 ■ 393 ...................... 79 ■ 394 ...................... 79 ■ 399 ...................... 80 ■...
Page 9 Index Index (cont.) Replacing the HBMU heat management unit ........93 ■ Replacing the power cable ..............93 ■ Replacing the HMI connecting cable ..........94 ■ Checking the plate heat exchanger ............ 94 ■ Removing the hydraulic unit ............... 95 ■...
Page 10: Information Disposal Of Packaging
Information Disposal of packaging Please dispose of packaging waste in line with statu- tory regulations. Gas Council No. Type Gas Council No.: Vitodens 050-W, B0HA, 19 kW 41-819-63 Vitodens 050-W, B0HA, 25 kW 41-819-64 Vitodens 050-W, B0KA, 25 kW 47-819-55 Vitodens 050-W, B0KA, 30 kW 47-819-57 Vitodens 050-W, B0KA, 35 kW...
Page 11: Symbols
Information 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: Symbol Meaning The numbers correspond to the order in Steps required during commissioning...
Page 12: Product Information
System examples with hydraulic and electrical connec- Detailed information regarding system examples: tion diagrams and function descriptions are available www.viessmann-schemes.com to help setting up the heating system. Maintenance parts and spare parts Maintenance parts and spare parts can be identified and ordered directly online.
Page 13: Viessmann Partnershop
Information Maintenance parts and spare parts (cont.) Viessmann Partnershop Login: https://shop.viessmann.com/ Viessmann spare part app www.viessmann.com/etapp...
Page 14: Preparing For Installation
Preparing for installation Preparing for installation 19 and 25 kW, type B0KA, B0HA, BPKA Ø 96 -0.5 Ø 60.5 +0.8 Fig. 2 Illustration shows a gas condensing combi boiler Condensate drain Heating return Heating flow Filling/draining DHW (gas condensing combi boiler) Dimension for siting with DHW cylinder below the Cylinder flow (gas condensing system boiler) boiler...
Page 15 Preparing for installation Preparing for installation (cont.) 32 kW, type B0KA Ø 96 -0.5 Ø 60.5 +0.8 Fig. 3 Illustration shows a gas condensing combi boiler Condensate drain Heating return Heating flow Filling/draining DHW (gas condensing combi boiler) Dimension for siting with DHW cylinder below the Cylinder flow (gas condensing system boiler) boiler Gas connection...
Page 16 Preparing for installation Preparing for installation (cont.) Note This boiler (IP rating: IP X4) is approved for installation in wet rooms inside safety zone 1, to DIN VDE 0100. Exposure to jets of water must be prevented. For open flue operation, the boiler may only be oper- ated with a splash cover.
Page 17 Preparing for installation Preparing for installation (cont.) Connection on the DHW side for gas condensing combi boiler Cold water installation Safety assembly is included in the standard delivery and requires installing. Only use a non-return valve or a combined shut-off and non-return valve in conjunction with a safety valve.
Page 18 Preparing for installation Preparing for installation (cont.) Note Ideal angle of penetration The WiFi signal strength can be increased with com- mercially available WiFi repeaters. Angle of penetration The reception quality remains best if radio signals hit the walls vertically. Depending on the angle of penetration, the effective wall thickness changes and so does the extent to which the electromagnetic waves are damped.
Page 19: Installation Sequence Removing The Boiler From The Packaging
Installation sequence Removing the boiler from the packaging Fig. 7...
Page 20: Mounting The Boiler And Making Connections
Installation sequence Mounting the boiler and making connections Removing the front panel Fig. 8 1. Unlock the front panel on the underside (push in), 3. and pull up to remove. using a screwdriver or similar tool. 2. Swivel the front panel forward slightly... Mounting the boiler on the pre-plumbing jig or mounting frame Note Various installation components can be found in a sep-...
Page 21 Installation sequence Mounting the boiler and making connections (cont.) Fig. 9 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 22: 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 23 Installation sequence Mounting the boiler and making connections (cont.) Fig. 10 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 24: 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 25: 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 26: 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 27: Electrical Connections
Installation sequence Gas connection (cont.) 2. Check for leaks. 3. Purge the gas line. Note Only use suitable and approved leak detection agents (EN 14291) and devices for the leak test. Leak detection agents with unsuitable constituents (e.g. nitrides, sulphides) can cause material dam- age.
Page 28: 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 29: 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 30: 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 31: Closing The Wiring Chamber
Installation sequence Closing the wiring chamber Fig. 20 Mounting the front panel Fig. 21...
Page 32: 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....................33 • • 2. Filling the heating system....................35 • • • 3. Checking all connections on the heating water and DHW sides for leaks....37 •...
Page 33: 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 34 Commissioning, inspection, maintenance Commissioning the system (cont.) Commissioning assistant Explanations and references sequence (value in bold is factory setting) "C.6" 2 - Natural gas CPG Gas type 3 - LPG (not for appliances with multiple connection) "C.7" 1 - Open flue 60 mm Flue system 2 - Room sealed 60/100 mm 3 - Open flue 80/125 mm...
Page 35: 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 36 Commissioning, inspection, maintenance Filling the heating system (cont.) E D C Fig. 24 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.
Page 37: Checking All Connections On The Heating Water And Dhw Sides For Leaks
Commissioning, inspection, maintenance Filling the heating system (cont.) 8. OK The filling function is activated. The display shows a rotating rectangle. The filling function ends automatically after 20 min or press for 4 s. Checking all connections on the heating water and DHW sides for leaks Danger Please note There is a risk of electric shock from escaping...
Page 38: 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 39: Checking The Static Pressure And Supply Pressure
Commissioning, inspection, maintenance Removing the front panel (cont.) Fig. 26 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 40 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 41: 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 42: 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 43 Commissioning, inspection, maintenance Adjusting the integral circulation pump rate (cont.) Residual heads of the integral circulation pump 19 to 25 kW 550 55 500 50 450 45 350 35 250 25 150 15 1000 1100 1200 Flow rate in litres/h Fig.
Page 44 Commissioning, inspection, maintenance Adjusting the integral circulation pump rate (cont.) Residual heads of the integral circulation pump 32 kW 550 55 500 50 450 45 350 35 250 25 150 15 1000 1100 1200 1300 1400 Flow rate in l/h Fig.
Page 45: Checking The Balanced Flue System For Leaks (Annular Gap Test)
Commissioning, inspection, maintenance Checking the balanced flue system for leaks (annular gap test) Fig. 31 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 46: 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 47: Checking The Burner Gasket And Burner Gauze Assembly
Commissioning, inspection, maintenance Checking the burner gasket and burner gauze assembly Fig. 32 19, 25 kW Fig. 33 32 kW...
Page 48 Commissioning, inspection, maintenance Checking the burner gasket and burner gauze… (cont.) 7. Align the hole in burner gauze assembly Check burner gauze assembly , electrodes , ther- 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 49: Checking And Adjusting The Ignition And Ionisation Electrodes
Commissioning, inspection, maintenance Checking the burner gasket and burner gauze… (cont.) Installing the burner gauze assembly Fig. 34 Checking and adjusting the ignition and ionisation electrodes Burners 19, 25 kW ±0.6 ±0.5 Fig. 35 Ignition electrodes Ionisation electrode...
Page 50: Checking The Back Draught Safety Devices
Commissioning, inspection, maintenance Checking and adjusting the ignition and… (cont.) 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. Clean the electrodes with a small brush (not a wire the electrodes and gaskets and adjust them as brush) or sandpaper.
Page 51: Cleaning The Heating Surfaces
Commissioning, inspection, maintenance Checking the back draught safety devices (cont.) Back draught safety device in the mixing shaft of Back draught safety device in the flue gas connec- the burner tion Fig. 38 Fig. 37 1. Remove the balanced flue system. 1.
Page 52: Checking The Condensate Drain And Cleaning The Trap
Commissioning, inspection, maintenance Cleaning the heating surfaces (cont.) 1. Use a vacuum cleaner to remove combustion resi- dues from heating surface of the heat exchanger. 2. Flush heating surface with water. 3. Check condensate drain. Clean the trap: See the following chapter.
Page 53: Installing The Burner
Commissioning, inspection, maintenance Installing the burner Fig. 41 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 54: Checking The Flow Limiter (Only For Gas Condensing Combi Boiler)
Commissioning, inspection, maintenance Checking the flow limiter (only for gas condensing combi boiler) Fig. 42 1. Drain the boiler on the DHW side. 5. Fit the DHW flow sensor with new gaskets. 2. Remove the spring clip. Danger Risk of electric shock from escaping heating 3.
Page 55: Checking The Safety Valve Function
Commissioning, inspection, maintenance Checking the expansion vessel and system… (cont.) 3. Top up with water until the charge pressure of the cooled system is at least 1.0 bar (0.1 MPa), and is 0.1 to 0.2 bar (10 to 20 kPa) higher than the pre- charge pressure of the expansion vessel.
Page 56: Checking The Combustion Quality
Commissioning, inspection, maintenance Checking the combustion quality The electronic combustion controller automatically Note ensures optimum combustion quality. During commis- To prevent operating faults and damage, operate the sioning/maintenance, only the combustion values need appliance with uncontaminated combustion air. to be checked. To do this, test the CO content and CO or O content, and record these in the report on page 105.
Page 57: Checking The Flue System For Unrestricted Flow And Leaks
Commissioning, inspection, maintenance Checking the combustion quality (cont.) 7. Check the CO content. If the actual value deviates 9. Re-seal test port from the permissible ranges by more than 1 %, Danger implement steps listed above. Escaping flue gas can damage your health. Check test port for leaks.
Page 58: 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 59: Minimum Heating Output
System configuration (parameters) Parameters (cont.) 6 Minimum heating output A limit can be set on the minimum heating output for Value Meaning heating mode. Delivered condition specified by settings specific to the appliance 0 to 100 Adjustable from 0 to 100 % 7 Maximum heating output A limit can be set on the maximum heating output for Value...
Page 60: Diagnosis And Service Service Menu
Diagnosis and service checks Service menu Calling up the service menu Press the following buttons: Note Press " " to return to the service menu. and OK simultaneously for approx. 4 s. 2. Select the required menu section (e.g. "b.1" Con- nect with software tool).
Page 61 Diagnosis and service checks Diagnosis (cont.) Note 3. OK If a called up sensor is faulty, "- - -" appears on the display. 4. Use to select the required entry. Calling up operating data Note to view "d.8" serial number of heat Tap the following buttons: generator in sections.
Page 62: 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 63: Overview Of Electronics Modules
Troubleshooting Overview of electronics modules Fig. 44 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 System characteristics Measures No DHW heating Check DHW setting in the commissioning assistant ■...
Page 64 Troubleshooting Fault messages (cont.) System characteristics Measures No DHW heating Check the cylinder temperature sensor (terminal S.T.S). Cause Replace faulty component if necessary. Short circuit, cylinder temperature sensor System characteristics Measures Regulates as if the outside temperature were 0 °C. ■...
Page 65 Troubleshooting Fault messages (cont.) System characteristics Measures Normal operation without room influence ■ Check commissioning setting of remote control. ■ Check plug and cable of external room temperature Cause sensor, heating circuit. ■ If no external room temperature sensor installed, Lead break, room temperature sensor replace programming unit.
Page 66 Troubleshooting Fault messages (cont.) Vent the system. Reset the appliance once the flue system has cooled down. System characteristics ■ Check gas supply (gas pressure and gas flow switch). Normal operation; burner restarts. ■ Check balanced flue system for flue gas recircula- tion.
Page 67 Troubleshooting Fault messages (cont.) Measures Check ionisation electrode for the following: ■ Check whether insulation block is touching electrode ceramic. Check gas solenoid valve: In the service menu under ■ "b.6", set the burner output to the lower heating out- put for approx.
Page 68 Troubleshooting Fault messages (cont.) System characteristics Vent the system. Burner locked out. If the fault reoccurs: Internal circulation pump off. No central heating and no ■ Check system pressure sensor with external pres- DHW heating sure gauge. ■ Check diaphragm expansion vessel pre-charge pres- Cause sure.
Page 69 Troubleshooting Fault messages (cont.) System characteristics Measures No central heating and no DHW heating Check circulation pump. Replace if necessary. Cause Internal circulation pump blocked System characteristics Measures Burner not operational ■ Check connection to the OpenTherm remote control. ■ If OpenTherm is not required, set "C.7"...
Page 70 Troubleshooting Fault messages (cont.) Measures ■ Check the fan unit for correct function. For this, check the stepper motor of the fan unit (reference run with mains ON). If the fault still persists, check the plug-in connec- ■ tions and cables of the CAN bus. Check further CAN bus subscribers.
Page 71 Troubleshooting Fault messages (cont.) Cause Check sensor lead. Replace faulty component if nec- essary. Short circuit, flow temperature sensor/high limit safety Reset the appliance. cut-out Measures Check the flow temperature sensor/high limit safety cut-out. System characteristics Measures Burner in a fault state Check the flow temperature sensor/high limit safety cut-out.
Page 72 Troubleshooting Fault messages (cont.) System characteristics Measures Burner in a fault state If several heat generators are connected to a common flue system: Check whether "Multiple connection" is Cause set in the commissioning assistant. Check the flue system for unrestricted flow. Gas modulation valve If fault remains, replace gas fan unit.
Page 73 Troubleshooting Fault messages (cont.) System characteristics Measures Burner in a fault state Replace gas fan unit. Cause Gas modulation valve tolerance outside permissible range System characteristics Measures Burner in a fault state Replace the HBMU heat management unit. See chap- ter "Replacing the HBMU heat management unit".
Page 74 Troubleshooting Fault messages (cont.) System characteristics Measures Burner in a fault state Replace the HBMU heat management unit. Cause Internal fault. System characteristics Measures Burner in a fault state Replace the HBMU heat management unit. Cause Gas valve relay contact feedback implausible (relay contact is "welded up") 366, 367 System characteristics...
Page 75 Troubleshooting Fault messages (cont.) System characteristics Measures Burner in a fault state Check the fan. Check the fan connecting cables. Cause Check the fan power supply. Reset the appliance. Fan speed too low System characteristics Note To prevent water damage, detach fan unit before Burner in a fault state removing the burner.
Page 76 Troubleshooting Fault messages (cont.) Measures Reset the appliance. ■ Check ionisation electrode and connecting cable. ■ Check plug-in connections for loose contacts. Check the flue system. Remove flue gas recirculation if nec- essary. Check system for condensate backup. Visually ■ check gas solenoid valve inlet and inlet strainer for contamination.
Page 77 Troubleshooting Fault messages (cont.) Measures Reset the appliance. ■ Check ionisation electrode and connecting cable. ■ Check plug-in connections for loose contacts. Check the flue system. Remove flue gas recirculation if nec- essary. Check system for condensate backup. Visually ■ check gas solenoid valve inlet and inlet strainer for contamination.
Page 78 Troubleshooting Fault messages (cont.) System characteristics Check balanced flue system for flue gas recirculation. Burner in a fault state Check ionisation electrode and burner gauze assem- bly: Cause ■ Clearance to burner gauze assembly ■ Contamination on electrode Flame is lost immediately after flame formation (during safety time) Reset the appliance.
Page 79 Troubleshooting Fault messages (cont.) Measures Reset the appliance. Check IO electrode for earth fault. If the fault persists, replace the HBMU heat management unit. System characteristics Measures Burner in a fault state Replace the HBMU heat management unit. See chap- ter "Replacing the HBMU heat management unit".
Page 80 Troubleshooting Fault messages (cont.) System characteristics Measures Burner in a fault state Check IO electrode for earth fault. If the fault persists, replace the HBMU heat management unit. See chapter Cause "Replacing the HBMU heat management unit". Reset the appliance. IO electrode earth fault, HBMU heat management unit faulty System characteristics...
Page 81 Troubleshooting Fault messages (cont.) System characteristics Measures Burner in a fault state Replace the HBMU heat management unit. See chap- ter "Replacing the HBMU heat management unit". Cause Reset the appliance. HBMU heat management unit faulty System characteristics Measures Burner in a fault state Check IO electrode for earth fault.
Page 82 Troubleshooting Fault messages (cont.) Measures Set the time. System characteristics Measures Burner in a fault state Check the flow temperature sensor/high limit safety cut-out. Cause Check plug-in connection and lead to sensor. Reset the appliance. Deviation, heat generator flow temperature sensor/ high limit safety cut-out 447, 448 System characteristics...
Page 83 Troubleshooting Fault messages (cont.) 455, 456 System characteristics Measures Burner in a fault state Reset the appliance. If the fault occurs repeatedly, replace the HBMU heat management unit. See chapter Cause "Replacing the HBMU heat management unit". Error in program run monitoring System characteristics Measures Burner in a fault state...
Page 84 Troubleshooting Fault messages (cont.) Measures Note Deposits on the electrodes indicate foreign bodies in Check flue system for contamination and flue gas the combustion air. Check the installation room and recirculation. Clean flue system if necessary. flue system for causes of the deposits. For example: Reset the burner.
Page 85 Troubleshooting Fault messages (cont.) Measures Note Deposits on the electrodes indicate foreign bodies in Check gap between ionisation electrode and burner the ventilation air. Check the installation room and flue gauze assembly. system for causes of the deposits. For example: Laun- Check whether there is a lot of dust in the ventilation dry detergents, cleaning agents, toiletries, deposits in air (e.g.
Page 86 Troubleshooting Fault messages (cont.) System characteristics Measures Normal operation without room influence Check external room temperature sensor for heating circuit or room temperature sensor on remote control Cause unit. Check setting of parameter 933.6 Room temperature sensor, heating circuit 1 not availa- System characteristics Measures Normal operation without room influence...
Page 87 Troubleshooting Fault messages (cont.) System characteristics Measures Normal operation without room influence Check external room temperature sensor for heating circuit or room temperature sensor on remote control Cause unit. Short circuit, room temperature sensor, heating circuit System characteristics Measures Burner in a fault state Check air mass flow rate sensor.
Page 88 Troubleshooting Fault messages (cont.) Cause Measures OpenTherm remote control connected but not config- Set "C.7" in the commissioning assistant to a value of ured System characteristics Measures Burner output is reduced to minimum Clean the heat cell. Perform maintenance. Cause Flue gas temperature too high.
Page 89: Repairs
Troubleshooting Fault messages (cont.) Measures Check pump. Replace if necessary. Pause time for DHW heating can be terminated by Check that the cylinder flow and return are open. mains reset. Check DHW setting in commissioning assistant and correct if necessary. System characteristics Measures No DHW heating...
Page 90: Removing The Boiler From The Pre-Plumbing Jig Or Mounting Frame
Troubleshooting Repairs (cont.) 3. If the boiler needs to be removed: ■ Isolate the system from the power supply, e.g. by removing the separate fuse or by means of a mains isolator, and check that it is no longer live. ■...
Page 91: Checking The Temperature Sensors
Troubleshooting Repairs (cont.) 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. Internal gasket diameter: Gas connection Ø...
Page 92 Troubleshooting Repairs (cont.) 3. Check the sensor resistance. Note position of 3. Check the sensor resistance. Compare the resist- guide lug ance with the value for the current temperature ■ Sensor 1: Connections 1 and 3 from the following diagram. ■...
Page 93: Replacing The Hbmu Heat Management Unit
See spare part installation instructions and inter- If replacing the HBMU heat management unit, net address: www.viguide.info "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.
Page 94: Replacing The Hmi Connecting Cable
Troubleshooting Repairs (cont.) Replacing the HMI connecting cable Please note Incorrect routing of the cable can lead to heat damage and impairment of the EMC properties. For positioning and securing of the cable (fixing point of the cable tie) see connecting cable installation instructions.
Page 95: Removing The Hydraulic Unit
Troubleshooting Repairs (cont.) 7. Install plate heat exchanger in reverse order using new gaskets. Tighten screws as tightly as necessary and ensure that the components are undamaged and are func- tioning correctly throughout service life. Observe torque settings if a torque wrench is avail- able.
Page 96 Troubleshooting Repairs (cont.) Fig. 48...
Page 97: Checking The Fuse
Troubleshooting Repairs (cont.) Checking the fuse Fig. 49 1. Turn off ON/OFF switch 4. Check fuse F1 (see connection and wiring dia- gram). 2. Pivot the HBMU heat management unit down. Danger 3. Remove the cover. Incorrect or improperly fitted fuses can lead to an increased risk of fire.
Page 98: 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 99 Function description Appliance functions (cont.) Slope -5 -10 -15 -20 Outside temperature in °C Fig. 50 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 100: 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 101: Connection And Wiring Dia-Hbmu Heat Management Unit
Connection and wiring diagram HBMU heat management unit Fig. 53 A1 HBMU heat management unit Fan motor control A2 Power supply unit Outlet temperature sensor (combi boiler only) X... Electrical interfaces Connection accessory 230 V Power supply 230 V/50 Hz Fan motor 230 V a-Ö...
Page 102 Connection and wiring diagram HBMU heat management unit (cont.) Mains input fÖ No function...
Page 103: Gram Hbmu Heat Management Unit
Connection and wiring diagram HBMU heat management unit Fig. 54 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 104 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 105: Commissioning/Service Report
Commissioning/service reports Report 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" (Commis- sioning ...) Enter gas type. Carbon dioxide content CO With natural gas At lower heating output...
Page 106 Commissioning/service reports (cont.) Settings and test values Set value Commission- Maintenance/ Maintenance/ service service At lower heating output % by See "Check- ■ vol. ing the com- bustion qual- At upper heating output % by ■ ity" (Com- vol. mission- ing ...) Oxygen content O At lower heating output...
Page 107: Specification Gas Condensing Combi Boiler
Specification Gas condensing combi boiler Gas boiler, type B and C, category Type B0KA Rated heating output range (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 32.0 3.2 to 19 3.2 to 25 3.2 to 32.0 = 80/60 °C...
Page 108 Specification Gas condensing combi boiler (cont.) Gas boiler, type B and C, category Type B0KA Rated heating output range (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 32.0 3.2 to 19 3.2 to 25 3.2 to 32.0...
Page 109 Specification Gas condensing combi boiler (cont.) Gas boiler, type B and C, category Type B0KA Rated heating output range (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 32.0 3.2 to 19 3.2 to 25 3.2 to 32.0...
Page 110: Flue System Types
Specification Gas condensing combi boiler (cont.) Gas boiler, type B and C, category Type B0KA Rated heating output range (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 32.0 3.2 to 19 3.2 to 25 3.2 to 32.0...
Page 111: Gas Categories
Specification Gas categories Available in the following countries Gas categories AE, AM, AZ, BA, BG, BY,CY, CZ, DK, EE, ES, FI, 2N/2H - G 20 - 20 mbar GB, GR, HR, IE, IT, IS, KG, KZ, LT, LU, LV, MD, ME, MT, NO, PT, RO, RS, RU, SE, SK, TR, UA, AM, AZ, BY, MD, KG, KZ, RU, UA, UZ 2N/2H - G 20 - (13) 20...
Page 112: 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 113: Certificates Declaration Of Conformity
Certificates Declaration of conformity We, Viessmann Climate Solutions SE, D-35108 Allen- dorf, declare as sole responsible body that the named product complies with the European directives and supplementary national requirements in terms of its design and operational characteristics. Viessmann Cli-...
Page 114: Keyword Index
Keyword index Keyword index Front panel removal..........20, 38 Angle of penetration........... 18 Function descriptions..........98 Function sequence.............41 Fuse................97 Back draught safety device........50 Boiler, fitting............20, 22 Boiler, removing............90 Gas connection............26 Boiler water temperature sensor........ 91 Gas solenoid valve.............40 Burner gasket.............47 Gas supply pressure..........
Page 115 Keyword index Keyword index (cont.) Set room temperature, setting........99 Parameters..............58 Specification.............107 – Adjusting..............58 Static pressure............40 – Calling up..............58 Subscriber number of connected component.... 62 – Energy saving functions, heating circuit....59 Supply pressure........... 39, 40 – Max. speed, heating circuit pump......58 Symbols..............11 –...
Page 116 Viessmann Climate Solutions SE Viessmann Limited 35108 Allendorf / Germany 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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Viessmann Vitodens 050-W B0HA Installation And Service Instructions Manual

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