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Thread: No power to "c" wire

  1. #13
    HVAC Thermostat Specialist

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    You should be able to do this w/o relays. Each zone should have a "hot" terminal that hooks to 24v, and a W for the heat call. There should be a C terminal on the board to get common.


  2. #14
    HVAC Thermostat Specialist

    User Info Menu

    While it may be possible without the relay..... it is safer (less likely to ruin the zone control) to use a relay setup than not.

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