Viessmann Vitoladens 300-C Installation And Service Instructions Manual page 41

Cleaning the heating surfaces
Fig. 36
Trap and condensate hose
1.
Fig. 37
Commissioning, inspection, maintenance
(cont.)
4. Flush the flue gas silencer and stainless steel heat
exchanger with water at low pressure through the
inspection port in the flue pipe
Note
Ensure that no water penetrates the ventilation air
gap of the balanced flue system.
1. Remove the trap.
2. Check the condensate drain connection on the
boiler and the condensate hose for dirt.
Clean the condensate hose with a suitable bottle
brush (accessories) if necessary.
2.
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