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  1. JamieP83

    Connecting a Viessmann 200W System boiler to Evohome 12 zone controller using modulation

    hey, how did you solve this?
  2. JamieP83

    Connecting a Viessmann 200W System boiler to Evohome 12 zone controller using modulation

    hey, got an example? i didnt think you could make a viessman boiler opentherm if it didnt have it built in? i have the Vitodens 222-f B2TF 32kw
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