Viessmann Vitodens 100W WB1B Service And Maintenance Manual
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Viessmann Vitodens 100W WB1B Service And Maintenance Manual

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Vitodens 100W WB1B - Service and
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Summary of Contents for Viessmann Vitodens 100W WB1B

  • Page 1 Vitodens 100W WB1B - Service and Maintenance...
  • Page 2 Vitodens 100W WB1B W 10-26: 37-91 MBH input. W 10-35: 37-118 MBH input.  Natural Gas or LPG (conversion kit supplied with boiler).  Altitudes up to 10,000 ft. (coding change required).  Temperature range 86°F - 178°F.  Venting up to 200’ equivalent length.
  • Page 3 Vitodens 100W WB1B Locating the boiler model number  Located on the rating plate mounted on the left side of the outer cover.
  • Page 4 Vitodens 100W WB1B Locating the boiler serial number  Located inside the outer cabinet on the left side of the burner compartment...
  • Page 5 Vitodens 100W WB1B Removing The Boiler Cover There are two screws 1 holding the cover in  place.  Loosen the screws before removing the cover (screws are captive and will remain in the boiler).  Flip up the control cover panel and lift the...
  • Page 6 Vitodens 100W WB1B Checking The Flue Collar And Flue Gas Sensor Gaskets  Inspect the flue gas collar gasket and the flue gas temperature sensor to make sure the seal is still good, and they are still positioned correctly. ...
  • Page 7 Vitodens 100W WB1B Parts List  The service manual contains drawings that help to identify the boiler’s components.  The parts catalogue available as a PDF download on the Viessmann Canada website will also provide the current part number for these components.

  • Page 8: Piping Connections

    Vitodens 100W WB1B Piping Connections 30 psi PRV Boiler service fill/purge valve Boiler service drain/purge 3/4” valve 3/4”NPT 3/4”NPT...
  • Page 9 Vitodens 100W WB1B Automatic Air Vent And Air Scoop  Serviceable automatic air vent.  Isolate the boiler’s supply and return connection.  Drain the water from the heat exchanger (~1US Gal).  Remove the hand tight air vent.
  • Page 10 Vitodens 100W WB1B Servicing The Automatic Air Vent  The air vent can be disassembled by pushing down on the top locking ring and turning the locking ring off.  Lift the top off the vent and disassemble the insides for cleaning.
  • Page 11 Vitodens 100W WB1B Servicing The Condensate Trap  The condensate trap should be inspected and if debris has built up inside, it should be removed and flushed clean.  A dirty trap can lead to backed up condensate that can prevent the burner from operating.

  • Page 12: Cleaning The Condensate Trap

    Vitodens 100W WB1B Cleaning the condensate trap  Disconnect the hoses attached to the trap and remove for cleaning.  If you expect to flush the fireside of the heat exchanger with water remember to clean the trap afterwards.
  • Page 13 Vitodens 100W WB1B Cleaning the condensate trap  The trap needs to be re-primed after the service is complete before the boiler is put into service.  Minimum of 10 Fl. oz. (0.3 Ltr) of water is required to prime the trap.

  • Page 14: Condensate Drain Line

    Vitodens 100W WB1B Condensate Drain Line  Make sure the flexible condensate drain line is terminated into a larger pipe so it can breath.  Piping the trap rigid into a waste drain without an air gap may cause the trap to not siphon correctly.
  • Page 15 Vitodens 100W WB1B Servicing Burner And Heat Exchanger...

  • Page 16: Burner Service

    Vitodens 100W WB1B Burner Service  Close the gas service isolation valve before removing the burner.  The gasket between the gas line and gas valve Cylinder burner should be replaced any time that connection is opened.  Fully modulating burner input for either Natural Gas or Propane.
  • Page 17 Vitodens 100W WB1B Burner Service  Place the burner on a clean dry surface.  Inspect components:  Refractory (flaking is normal, cracks are a sign of damage).  Cylinder (look for hotspots or damage to the mesh).  Electrode ...
  • Page 18 Vitodens 100W WB1B Cleaning And Inspecting The Electrode  The electrode gap and spacing should be checked when the electrode is inspected and cleaned.  Checking the porcelain for cracks can be done at the same time.  Do not use a metallic object to clean...
  • Page 19 Vitodens 100W WB1B The Heat Exchanger 316Ti stainless steel.  High grade  1.5 mm wall thickness.  Compact radial design.  Intensive heat transfer with single pass.  Flue gas gaps via material embossed pins on coil.  45 PSIG MAWP * ...
  • Page 20 Vitodens 100W WB1B The Heat Exchanger Flue gas  Condensation occurs on the outside of coil.  Self-cleaning on condensing surface of heat exchanger.  Narrow gap width 0.8 mm + or – 0.01mm. Condensate...

  • Page 21: Cleaning The Heat Exchanger

    Vitodens 100W WB1B Cleaning The Heat Exchanger  Using a NON-Metallic brush clean the loose deposits from the heat exchanger.  A vacuum can aid in removing the dirt from the heat exchanger (compressed air may push the dirt further into the...
  • Page 22 Vitodens 100W WB1B Viessmann Coil Cleaning Tool  It may be necessary if the heat exchanger is severely plugged to use the Viessmann coil cleaning tool.  Use a vacuum to assist removing the debris from the heat exchanger. Part #...
  • Page 23 Vitodens 100W WB1B Cleaning The Heat Exchanger  Severe deposits or staining that cannot be removed with a brush and vacuum can be removed with a chemical cleaning.  Follow Material Safety Data Sheet (MSDS) of the cleaning agent manufacturer.
  • Page 24 Vitodens 100W WB1B Before You Reassemble And Fire The Boiler  Be sure to clean the condensate trap after flushing the dirt from the heat exchanger.  If the refractory has gotten very wet, dry it with a hair dryer or heat gun before firing...
  • Page 25 Vitodens 100W WB1B Minimum & Maximum Flow Requirements  There are minimum and maximum flow rates specified for the boiler.  Flow rates below the minimum may not allow the flow proving switch to close.  Flow rates above the maximum will effect the boiler...
  • Page 26 Vitodens 100W WB1B Primary / Secondary Piping For Low Mass Boilers  It is always recommended, with low mass boiler such as the Vitodens 100, that a primary / secondary piping layout is used. Hydraulic system  This ensures correct flow through the boiler decoupling with Low at all times.

  • Page 27: Checking The Flue Gas Temperature Sensor

    Vitodens 100W WB1B Checking The Flue Gas Temperature Sensor  If it is suspected the flue gas sensor is not operating correctly it can be checked with a temperature meter and an ohm meter.  Flue Vent Limit Take the temperature at the probe tip and...
  • Page 28 Vitodens 100W WB1B Checking The Boiler Water Temperature Sensor (AHL)  The boiler water temperature sensor can be checked in the same manner as the sensor flue gas temperature sensor.  Make sure you use the correct chart for each sensor, as some sensors in the...

  • Page 29: Checking The Gas Pressure

    Vitodens 100W WB1B Checking The Gas Pressure  Check the inlet gas pressure at high fire before doing the combustion analysis.  Running pressures should be between:  4” wc and 14”wc for Natural Gas.  10” wc and 14” wc for LPGas.
  • Page 30 Vitodens 100W WB1B Testing The Products Of Combustion  A combustion test should be performed any time the burner has been serviced and when the boiler is commissioned.  Insert the test probe of the combustion analyzer into the test port in the boiler’s flue gas collar.

  • Page 31: Performing A Combustion Test

    Vitodens 100W WB1B Performing A Combustion Test  Turn the heating dial to the right all the way to the reset position, wait for “SERV” to be displayed on the screen then turn the dial back into the control range.

  • Page 32: Burner Adjustments

    Vitodens 100W WB1B Burner Adjustments  Adjustment to the fuel air mixture can be done at the adjustment points on the burner.  If the CO is within the ranges published in the manual no adjustment is required.
  • Page 33 Vitodens 100W WB1B Testing The Products Of Combustion  When the boiler is vented with a coaxial venting system the integrity of the flue gas pipe cannot be visually inspected.  Using a combustion analyzer into the combustion air test port will test for products of combustion in the fresh air that might be present if the vent pipe gaskets are compromised.
  • Page 34 Vitodens 100W WB1B Power Pump Module Power Pump Module...

  • Page 35: Power Pump Module

    Vitodens 100W WB1B Main Control Fuse  Located inside the Power Pump Module 6.3A main Fuse Power Pump Module...

  • Page 36: Main Control Interface

    Vitodens 100W WB1B Main control Interface Note:  Power switch turns the power off to the Control Module not the Power Pump Module. Programming & Heating set point Programming adjustment & CombiPLUS DHW Control power set point selector switch dial...

  • Page 37: Lcd Display

    Vitodens 100W WB1B LCD Display Temperature °F, Call for heat Fault #, Call for DHW Program code value, display Service Fault mode Burner on Eco / Comfort mode indicators (CombiPLUS only) Modulation...
  • Page 38 Vitodens 100W WB1B Faults And Fault Reset  Faults are displayed on the main LCD window  The fault code chart in the Service manual will provide clarification of the faults Fault Code Fault Indicator...
  • Page 39 Vitodens 100W WB1B Fault Code Checker  There is now a fault code checker on the Viessmann Canada website under the Pro Login tab.  http://www.viessmann.ca This is also included in the VitoApp available through the Android Play Store or the Apple ...
  • Page 40 Vitodens 100W WB1B Call For Heat But Burner Won’t Fire And No Fault Code Is Displayed  The DHW or Heating Icon is displayed but the burner is not operating.  This is typically a sign of no, or low water flow.
  • Page 41 Vitodens 100W WB1B Boiler Coding Quick Reference Chart...
  • Page 42 Vitodens 100W WB1B Boiler Coding Quick Reference Chart...
  • Page 43 Get more training at one of our in-depth 1 or 2-day Academy seminars. Go to the Academy section of the Viessmann website for the full schedule of all our in- house training. Recordings of this and other Viessmann Academy Webinars are available on-line at our website: http://www.viessmann.ca/en/company/academy/webinar...
  • Page 44 Vitodens 100W WB1B - Service and Maintenance...

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