Viessmann Vitodens 100 Installation And Service Instructions Manual page 51

Routine Servicing Instructions
2. Release the three Torx screws, and
remove thermal insulating ring C.
3. Release the four Torx screws, and
remove burner gauze assembly D
with its gasket E.
Checking and adjusting the ignition and ionisation electro-
des
A Ignition and ionisation electrode
1. Check the electrode for wear and
contamination.
(cont.)
4. Insert and secure a new burner
gauze assembly D with a new
gasket E.
5. Refit the thermal insulation ring C.
6. Refit the electrode B.
2. Clean the electrode with a small
brush (not with a wire brush) or
emery paper.
Service Instructions
51