Viessmann Vitodens 300 Service Instructions Manual page 91
Type wb3a, 49 and 66 kw gas fired wall mounted condensing boiler natural gas and lpg version
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Also See for Vitodens 300:
- Service instructions manual (132 pages) ,
- Datasheet (41 pages) ,
- Installation instructions manual (20 pages)
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Repairs
(cont.)
Checking O-rings:
1. Pull off the electrical plug A.
2. Remove sensor B by pulling it
upwards.
3. Ensure that both O-rings C are
properly inserted into aperture
adaptor retainers D.
4. Insert the sensor with connection
nipples into the gas combination
valve adaptor and push in until it
clicks into place.
5. Reconnect the electrical plug-in
connector on the sensor.
Troubleshooting
91
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