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  1. #1
    Join Date
    Oct 2019
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    Thermostat Wiring

    If necessary, please move to appropriate category.

    I have a question about the wiring. I have a Peerless oil burner and I am going to be using Ecobee4 thermostat to control it. I haven't installed the thermostat yet.

    Downstairs- RH (white) and W/B (Black) wire.

    Upstairs- RC jump RH (Red). RH (Yellow). Y/O (Black). W/B (Black) wire

    I am not sure what W/B wire is and what Y/O is. The instructions don't have these wires listed and the backplate doesn't have these letters on it. The existing thermostat works just fine with these wires but I am not sure the purpose of them.


  2. #2
    Join Date
    May 2004
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