Cleaning The Flue Gas Fan; Cleaning The Lambda Probe - Viessmann Vitoligno 300-H Installation And Service Instructions For Contractors

Cleaning the flue gas fan

Danger
Working on the flue gas fan while it is running
can cause serious injury.
Turn off the boiler and safeguard against restart-
ing.
3.
1.
Fig. 59
Note
Remove the top casing panels.

Cleaning the Lambda probe

Danger
Hot Lambda probe may cause burns.
Allow the Lambda probe to cool down before
■
removing.
■ Wear safety gloves.
2.
Commissioning, inspection, maintenance
Note
The flue gas fan requires cleaning in the following
cases:
■ In case of vibration noise due to impeller imbalance
(deposits on the impeller vanes).
The boiler output is reduced.
■
3. Remove the fan.
Clean the flue gas fan impeller with a soft brush
and a vacuum cleaner and check for damage.
77