Viessmann GC1 - Resetting the Date and Time; Selecting the Language

Settings
21
Resetting the date and time Vitotronic 300-K, MW1S
The time and date are preset in the factory and can be changed manually.
There is no need for manual resetting in conjunction with a radio clock receiver
(accessory).
Time
DDate
We
1. Open the hinged cover on the
programming unit.
2.
Press ; the ”Time”
appears in the display
window.
3. / Press / until the
required time appears.
4. Press to confirm;
the display changes and
shows the ”Date”.
5. / Press / until the
required date appears.
6. Press to confirm;
the display changes and
shows the boiler temperature.
7. Close the hinged cover on the
programming unit.
Selecting the language Vitotronic 300-K, MW1S
User No.
i ºC
English
i
1. Open the hinged cover on the
programming unit.
2. Press the heating circuit selector
button; the button is illuminated.
3. Press ; the ”User No.”
appears in the display
window.
4. Press until the required
language appears.
5. Press to confirm;
the display changes and
shows the boiler temperature.
6. Close the hinged cover on the
programming unit.
5581 751 v1.1