Viessmann Vitoligno 300-C Installation And Service Instructions For Contractors page 42

Commissioning, inspection, maintenance
Opening the boiler for cleaning
Opening the boiler at the top
B
Fig. 32
1. Remove thermal insulation mat
2. Disconnect push-fit connections
probe and the flue gas fan.
3. Undo nuts on the flue outlet.
C
4. Remove cover
D with the flue gas fan. For this,
undo 4 screws.
42
(cont.)
. 5. Remove combustion chamber cover
A
B of the Lambda
6. Clean the inside of the combustion chamber cover
undo the 3 nuts.
and inspect the gasket for damage.
A
C
D
E
. For this,
E