Venting The Heating System; Filling The Siphon With Water - Viessmann Vitodens 200-W Installation Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps

Venting the heating system

1. Close the gas shut-off valve and
switch the control unit ON.
2. Activate venting program (see follow-
ing steps).
Note
For function and sequence of the
venting program, see page 154.
Activating the venting function
Weather-compensated control unit
Service menu
1. Press OK and å simultaneously for
approx. 4 s.
2. "Service functions"
3. "Venting"
Venting function is enabled.
4. Ending venting function:
Press OK or ä.

Filling the siphon with water

Multi boiler system:
Fill the siphon in the flue gas header with
water as well.
34
3. Check system pressure.
Constant temperature control unit
Service menu
1. Press OK and å simultaneously for
approx. 4 s.
2. Select "5" with Ú and confirm with
OK.
"ON" flashes.
3. Activate the venting function with OK.
"EL on" is shown constantly.
4. Ending venting function:
Press ä.
(cont.)