Filling The Siphon With Water; Checking All Connections On The Heating Water Side And Dhw Side For Leaks; Checking The Power Supply; Designating Heating Circuits - Only For Weather-Compensated Control Units - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Venting the heating system
2. Activate venting program (see following steps).
Note
For function and sequence of the venting program,
see page 122.
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 .
ä

Filling the siphon with water

D
E
F
C
B
Fig.24

Checking all connections on the heating water side and DHW side for leaks

Checking the power supply

Designating heating circuits - only for weather-compensated control units

In the delivered condition, heating circuits are designa-
ted "Heating circuit 1", "Heating circuit 2" and "Heating
circuit 3" (if installed).
If the system user prefers, heating circuits can be re-
designated to suit the specific system.
30
(cont.)
3. Check the system pressure.
Constant temperature control unit
Service menu
1. Press OK and
2. Select "
"ON" flashes.
3. Activate the venting function with OK.
"EL on" is shown constantly.
4. Ending venting function:
Press
1. Pull off cap
2. Undo hose
3. Undo union nut
4. Fill siphon
5. Refit hose
A
6. Push on cap
To enter names for heating circuits:
simultaneously for approx. 4 s.
å
5 " with and confirm with OK.
Ú
.
ä
downwards.
C
D .
and pull off siphon
E
wards.
F with water and refit.
.
D
C from below.
Operating instructions
down-
F