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Override mode: The room tempe-
rature is controlled according to the day
temperature until the next reduce setting.
Holiday program: during the holidays the
room temperature is controlled according to
the adjusted "reduced" temperature.
Temporarely change of the temperatur
Heating demand to the boiler
3
Actual temperature
4
Heating indicator (I = Heating period on)
Device description
VRT 220 is a programmable roomthermostat.
They can be connected with all Vaillant boilers and
outside boilers with 230 V thermostat input.
The thermostat already carries out a sensible hea-
ting programme:
Pre-set values
Heating period
VRT 220
6.00 . . . 22.00
GB
9
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