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    Viessmann Vitotronics (and other systems?) room temperature

    Hi there, I have a Vitodens 200 fitted with a Vitotronics 200 control. The Vitotronics allows me to program on-off cycles and where it switches between "room temperature" (on) and "reduced room temperature" (off). At least this is what I've understood. What I don't understand is what it...
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