Viessmann Vitodens 300 Service Instructions Manual page 22

Initial start-up, inspection, maintenance
Further details regarding the individual steps
Checking the condensate drain and cleaning the siphon
Checking all gas equipment for soundness at operating pres-
sure
Danger
Escaping gas leads to a risk of
explosion.
Check gas equipment for
soundness.
22
(cont.)
3. Secure the gas supply pipe with a
new gasket.
4. Check the gas connections for
soundness.
Danger
Escaping gas leads to a risk
of explosion.
Check all fittings for sound-
ness.
5. Connect the electrical cables/leads
to each corresponding component.
1. Check at the siphon, that the con-
densate can freely drain.
2. Remove the retaining clip and the
siphon.
3. Clean the siphon.
4. Fit the siphon and secure with the
retaining clip.