Setting The Time And Date (If Required) - Only For Weather-Compensated Control Units; Note On Automatic Testing Of The Flue Gas Temperature Sensor; Venting The Heating System - Viessmann Vitodens 200-W Series Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Selecting the language (if required) - only for...
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Fig. 19
Setting the time and date (if required) - only for weather-compensated
control units
The time and date need to be reset during commis-
sioning or after a prolonged time out of use.
Extended menu:
1.
å
2. "Settings"

Note 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 incorrectly posi-
tioned, commissioning will be cancelled and fault mes-
sage A3 will be shown (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 98.
24
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BG
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CZ
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DK
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(cont.)
3. "Time / Date"
4. Set current time and date.
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 incorrectly posi-
tioned, commissioning will be cancelled and fault mes-
sage A3 will be shown (see page 88).
3. Check the system pressure.