Viessmann VITODENS 100-W Installation And Service Instructions Manual page 17

Further details regarding the individual steps
Checking and adjusting the ignition and ionisation electrodes
A Ignition and ionisation electrode
Check the electrode for wear and con-
tamination
Clean the electrode with a small brush
(not with a wire brush) or emery paper.
Commissioning, inspection, maintenance
(cont.)
Check all clearances. If the gaps are not
as specified or the electrode is damaged,
replace and align the electrode together
with new gaskets. Tighten the electrode
fixing screws. (2.5 Nm approx.).
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