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    roadfire's Avatar
    roadfire Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jul 2, 2007, 08:40 AM
    Hunter thermostat wiring?
    I have a 25 y/o unit, one part of furnace in the attic and a outside unit all electric
    The outside says magic chef
    The old thermostat is a honeywell with the following wiring:

    Wire color ----------position
    Green G
    Red RC also jumpers to RH
    Red W2
    White W1
    Yellow Y1

    New digital thermostat is Huntermodel 42999B
    It accepts five wires
    Positions available are:
    G
    W
    Y
    RH
    RC
    My question is where does the 2nd red wire going to W2 hook up to? And why does the old RC jumper to Rh I figured I wouldn't need the jumper with a five wire system
    Thanks for any and all help
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Jul 2, 2007, 11:56 AM
    The Rh and Rc are jumper because you have only one 24 volt thermostat. R means 24 v supply the c means cool and the h means heat so you must have AC. The W2 is a heat pump relay 2. I am not 110% sure but I think you bought a non-compatible stat. Check out these specs model 42999B digital thermostats at hunter-thermostats.com. I don't see that this unit can handle a heat pump.
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