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Checking the doors for tightness
3.
2.
1.
Fig. 26
Observe the following sequence:
Cleaning the flue gas fan
Danger
Risk of burns from hot components.
Switch off the boiler and let it cool down.
Danger
Working on a running fan can cause serious
injury.
Turn off the boiler and safeguard against restart-
ing.
Commissioning, inspection, maintenance
(cont.)
B
A
4.
■
Undo nuts
.
A
Shift the hinge or lock plate. To do this with the lock
■
plate, adjust the nuts
■
Retighten nuts
.
A
Note
The flue gas fan requires cleaning in the following
cases:
■
Vibration noises occur due to impeller imbalance
(deposits on the impeller vanes).
■
Output is reduced.
B
on the eye screw.
39
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