Filling The Siphon With Water - Viessmann Vitodens 222-F Installation And Service Instructions For Contractors

Commissioning, inspection, maintenance
Venting the heating system
4. Check the system pressure.
Activating the venting function
Weather-compensated control unit
Service menu
1. Press OK and simultaneously for approx. 4 s.
å
2. "Service functions"
3. "Venting"
Venting function is enabled.
4. Ending venting function:
Press OK or .
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Filling the siphon with water

B
A
C
Fig. 22
1. Pivot the control unit forwards.
2. Remove retaining clip
3. Pull filler pipe
B upwards.
4. Remove trap downwards.
C
5. Fill siphon with water and refit.
30
(cont.)
.
A
5. Open the gas shut-off valve.
Constant temperature control unit
Service menu
1. Press OK and simultaneously for approx. 4 s.
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2. Select " " with and confirm with OK.
5
Ú
"ON" flashes.
3. Activate the venting function with OK.
"EL on" is shown constantly.
4. Ending venting function:
Press .
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6. Check that the condensate pipe is connected cor-
rectly to the siphon and heat exchanger.
Note
Route the drain hose without any bends and with a
constant fall.
7. Refit the cover panel.
8. Secure the control unit back in the operating posi-
tion.