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 Series Installation And Service Instructions Manual

Venting the heating system
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

Multi-boiler system:
Fill the siphon in the flue gas header with water as
well.
A B C
Fig. 20

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, the heating circuits are des-
ignated "Heating circuit 1", "Heating circuit 2" and
"Heating circuit 3" (if installed).
If the system user prefers, the heating circuits can be
designated differently to suit the specific system.

Checking the gas type

The boiler is equipped with an electronic combustion
controller that adjusts the burner for optimum combus-
tion in accordance with the prevailing gas quality.
Commissioning, inspection, maintenance
(cont.)
Constant temperature control unit
Service menu
1. Press OK and
å
2. Select "
5 " with
"ON" flashes.
3. Activate the venting function with OK.
"EL on" is shown constantly.
4. Ending venting function:
Press .
ä
1. Remove retaining clip
2. Fill siphon with water and reassemble.
C
Note
Never twist the supply hose during assembly. Route
the drain hose without any bends and with a con-
stant fall.
To enter names for heating circuits:
Operating instructions
simultaneously for approx. 4 s.
and confirm with OK.
Ú
and pull out insert
A
.
B
25