Viessmann Vitodens 100 WB1A Installation And Service Instructions Manual page 63

Routine Servicing Instructions
Checking the condensate drain and cleaning the siphon
Service Instructions
(cont.)
1. Check at the siphon, that the con-
densate can freely drain.
2. Place an appropriate container
under the siphon A.
3. Remove the locking cap B and
drain the siphon content.
4. Replace the locking cap B.
5. Fill the siphon A with water by
pouring about 0.3l of water into the
combustion chamber.
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