90
Maintenance
Maintenance details
CAUTION:
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before carrying out maintenance or
repair works on the boiler.
Ventilator unit and burner cassette
(see illustration)
- remove the fast clip on the venturi
(1) and the gas valve (2) and
remove the gasline (3);
- Replace the gaskets of the gasline
(O-ring) with new ones;
- Disconnect the electrical
connections from the fan (4);
- Turn (A) clockwise the left (5) and
anti-clockwise the right (6) clamp
bars a quarter turn with the alan
key and pull these out in a forward
Direction (B).
- Now lift the complete fan unit (7)
with the upper tray and remove it in
a forward motion;
A
B
B B
A
A
1
3
4
4
4
2
5
6
7
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