Viessmann GC1 - Page 9

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9
Selecting the heating program (winter, summer) Vitotronic 300-K, MW1S
In the ”Central heating and domestic hot water” heating program, central heating
takes place with alternating ”normal room temperature” and ”reduced room
temperature” according to the selected time program.
You can set the required room temperature as follows:
To change the ”normal room temperature” (day temperature)
Normal room temp.
ºC
Factory setting:
20 ºC / 68 ºF from 06:00 to 22:00 hrs.
The ”normal room temperature” can be
set between 3 and 37 ºC /
37 and 99 ºF.
1.Press the heating circuit selector
button; the button is illuminated.
2.Set the required temperature value
with the “ts” selector knob.
The display changes after a short
time and shows the boiler sequence.
To change the ”reduced room temperature” (night temperature)
Reduced room temp.
ºC
Factory setting:
frost protection 3 ºC / 37 ºF from
22.00 to 6.00 hrs.
The “reduced room temperature” can
be set between 4 and 37 ºC / 39 and
99 ºF.
1.Open the hinged cover on the
programming unit.
2.Press the heating circuit selector
button; the button is illuminated.
3.
Press ; the previous
temperature setting flashes
in the display window.
4. / Press the / button
until the required
temperature value appears.
5. Confirm by pressing ;
the temperature value
stops flashing and is stored.
The display changes and
shows boiler sequence.
6. Close the hinged cover on the
programming unit.
Please note:
If the temperature value 3 ºC /
37 ºF is selected ,
“frost protection” appears in the
display window.
5581 751 v1.1