Viessmann Vitodens 100-W WB1B Series Installation and user guide

Vitodens 100W WB1B - Service and
Maintenance

Vitodens 100W WB1B Service, Web Based Training Foil 2, 11/2015 © Viessmann Manufacturing
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.
Outdoor reset, & OpenTherm control compatible.

Vitodens 100W WB1B Service, Web Based Training Foil 3, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
Located on the rating plate mounted on
the left side of the outer cover.
Locating the boiler model number

Vitodens 100W WB1B Service, Web Based Training Foil 4, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
Located inside the outer cabinet on
the left side of the burner
compartment
Locating the boiler serial number

Vitodens 100W WB1B Service, Web Based Training Foil 5, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
There are two screws 1holding 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
cover off.
Removing The Boiler Cover

Vitodens 100W WB1B Service, Web Based Training Foil 6, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
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.
If either of these are damaged or misaligned, flue gas can enter the burner cabinet and cause
damage.
Checking The Flue Collar And Flue Gas Sensor Gaskets

Vitodens 100W WB1B Service, Web Based Training Foil 7, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
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.
Parts List

Vitodens 100W WB1B Service, Web Based Training Foil 8, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
Piping Connections
Gas
3/4”
NPT
3/4”NPT
30 psi PRV
Boiler service
fill/purge valve
Boiler service
drain/purge
valve
3/4”NPT

Vitodens 100W WB1B Service, Web Based Training Foil 9, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
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.
Automatic Air Vent And Air Scoop

Vitodens 100W WB1B Service, Web Based Training Foil 10, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
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.
Usually a good rinse in a sink will be sufficient to remove deposits that can prevent the float from
being buoyant.
Reassemble in the reverse order.
Make sure not to damage the O-ring on the base.
The vent is tightened hand tight into the air scoop.
Servicing The Automatic Air Vent
Locking Ring
O Ring

Vitodens 100W WB1B Service, Web Based Training Foil 11, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
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.
Servicing The Condensate Trap

Vitodens 100W WB1B Service, Web Based Training Foil 12, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
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.
Cleaning the condensate trap

Vitodens 100W WB1B Service, Web Based Training Foil 13, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
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.
Sports bottle can be used to put water into combustion air test port
Cleaning the condensate trap

Vitodens 100W WB1B Service, Web Based Training Foil 14, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
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.
Condensate Drain Line
Condensate Hose
Air Gap required,
Do Not pipe rigid
to drain

Vitodens 100W WB1B Service, Web Based Training Foil 15, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
Servicing Burner And Heat Exchanger

Vitodens 100W WB1B Service, Web Based Training Foil 16, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
Close the gas service isolation valve before
removing the burner.
The gasket between the gas line and gas valve
should be replaced any time that connection is
opened.
Fully modulating burner input for either Natural
Gas or Propane.
Service to the burner is recommended annually,
especially when operated with LP Gas.
Burner Service
Burner seal gasket
Burner Refractory
Ignition &
Ionization
electrode
Gas valve Premix
blower assembly
Cylinder burner

Vitodens 100W WB1B Service, Web Based Training Foil 17, 11/2015 © Viessmann Manufacturing
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
Clean the burner and electrode with a non-metallic
brush.
Use a vacuum as required (compressed air can
push surface dirt into the burner).
Gasket (if cracked or brittle, replace)

Vitodens 100W WB1B Service, Web Based Training Foil 18, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
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
the electrode as this will reduce the life
of the electrode.
It may be necessary to remove the
electrode for cleaning.
Do not damage the gasket.
Replace the electrode if it cannot be
cleaned with a non metallic brush
Cleaning And Inspecting The Electrode

Vitodens 100W WB1B Service, Web Based Training Foil 19, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
High grade 316Ti stainless steel.
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 *
* Shipped with 30 PSIG PRV standard.
The Heat Exchanger
Designed and manufactured by
Viessmann in Germany

Vitodens 100W WB1B Service, Web Based Training Foil 20, 11/2015 © Viessmann Manufacturing
Vitodens 100W WB1B
Condensation occurs on the outside of coil.
Self-cleaning on condensing surface of heat
exchanger.
Narrow gap width 0.8 mm + or –0.01mm.
The Heat Exchanger
Condensate
Flue gas