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Can an Extension Kit do a ZeroVolt link ?

championc
championc ✭
in General Questions & Topics
Can the Extension Kit give a ZeroVolt Volt Free connection ? Basically, if a boiler needs two pins to be shorted out to fire the boiler, can the Extension kit do such a connection, or does it just send 230v down one link ?

Best Answer

  • wateroakley
    wateroakley Volunteer Moderator
    Answer ✓

    To power the receiver, use N L Earth.

    For a voltage-free relay/switch, use COM and NO.

    image.png


Answers

  • championc
    championc ✭
    Or does anyone have the pinouts for an Extension Kit ?

    My gut feeling is that a relay just closes two pins creating a loop / short (hopefully)
  • championc
    championc ✭

    Exactly what I hoped and thought - happy days.

    The reason for the question is that I'm planning a Heatpump installation for this summer, with a Vaillant AroTherm+. The AroTherm+ can be controlled by a "normal" ZeroVolt (Volt Free) Room Stat.

    Therefore, the Extension Kit, via COM and NO, will do exactly the same thing as a Room Stat.

    While most people are going from a traditional boiler which may heat for an hour in the morning and xx hours in the evenings, to a Heatpump running 24hrs - I have no intention of running the Heatpump for 24hrs. I am happy to run it for a pattern somewhat similar to a gas boiler.

    I know it's won't be as efficient from a COP perspective, but it will cost far less over 24hrs than running 24 x 7

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