Checking The Flue Gas Non-Return Device - Viessmann Vitodens 200-W Installation Instructions Manual

Further details regarding the individual steps

Checking the flue gas non-return device

1. Undo 3 screws and remove fan A.
2. Remove flue gas non-return device
B.
3. Check the damper and gasket for dirt
and damage. Replace if required.
Commissioning, inspection, maintenance
B
A
4. Refit flue gas non-return device B.
5. Refit fan A and secure with 3
screws.
Torque: 3.0 Nm
(cont.)
45