Information On Automatic Testing Of The Flue Gas Temperature Sensor; Venting The Heating System; Filling The Trap With Water - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Information on automatic testing of the flue gas temperature sensor

Weather-compensated control unit
As soon as the time and date have been set, the con-
trol unit automatically checks the function of the flue
gas temperature sensor.
The display shows: "Flue gas temp sensor test" and
"Active"
Note
If the flue gas temperature sensor is positioned incor-
rectly, commissioning is cancelled and fault message
A3 is displayed (see page 88).

Venting the heating system

1. Close the gas shut-off valve and switch the control
unit ON.
2. Activate venting program (see following steps).
Note
For function and sequence of the venting program,
see page 112.
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 trap with water

Multi boiler system:
Fill the trap in the flue gas header with water as well.
A B C
Fig. 22
Commissioning, inspection, maintenance
Constant temperature control unit
Immediately after being switched on, the control unit au-
tomatically checks the function of the flue gas tempera-
ture sensor.
The display shows: "A".
Note
If the flue gas temperature sensor is positioned incor-
rectly, commissioning is cancelled and fault message
A3 is displayed (see page 88).
3. Check the system pressure.
Constant temperature control unit
Service menu
1. Press OK and simultaneously for approx. 4 s.
å
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 .
ä
1. Remove retaining clip
2. Fill trap C with water and reassemble.
Note
Never twist the inlet hose during assembly. Route
the drain hose without any bends and with a con-
stant fall.
and pull out insert .
A B
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