Viessmann Vitodens 200, Service Instructions Manual

Page: 17 / 116

17
Initial start-up, inspection and maintenance
Further details regarding the individual steps
(cont.)
Removing the burner and checking the burner gasket for leaks
1. Switch off the system on the
control unit and the mains
electrical supply.
2. Close the gas shut-off valve and
safeguard against re-opening.
3. Pull the electrical cables off fan
motorĂ A , differential pressure
sensorĂ B , gas valveĂ C , ionisation
electrodeĂ D , ignition unitĂ E and
earthĂ F .
4. Loosen gas connection pipeĂ G .
5. Slacken six nutsĂ H and remove
the burner.
¨ Do not rest the burner on the
gauze assembly (wire mesh).
6. Check the burner gasket for
damage (U-shaped gasket, see
parts list) and replace if necessary.
¨ Generally, replace the burner
gasket every two years.
5692Ă485
G
B
H H H
E
H
H
G
D
B
C
H
A F