Viessmann VITODENS 333 Service Instructions Manual page 91
Compact gas fired condensing boiler natural gas and lpg version
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Also See for VITODENS 333:
- Service instructions manual (132 pages) ,
- Instruction manual (16 pages) ,
- Technical manual (180 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-ringsC 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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