Venting The Boiler; Filling The Trap With Water - Viessmann Vitodens 222-F Installation And Service Instructions For Contractors

Commissioning, inspection, maintenance

Venting the boiler

A
Fig. 22

Filling the trap with water

Fig. 23
1. Disconnect condensate hose
30
C
B
from the trap.
A
1. Close the shut-off valves on the heating water side.
2. Note
Only carry out the following tasks with the control
unit switched off.
Pivot the control unit down.
3. Remove cover panel
A
4. Push the drain hose onto air vent valve
connect to a drain.
5. Open air vent valve
B
ing return and vent (flush) using mains pressure
until no more air noise can be heard.
6. First close air vent valve
7. When the required operating pressure has built up,
close fill valve . Open the shut-off valves on the
C
heating water side.
8. Remove the drain hose from air vent valve
retain.
A
B
C
D
2. Turn internal pipe and pull upwards.
B
.
and
B
and fill valve in the heat-
C
B .
B and