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    cliffj64's Avatar
    cliffj64 Posts: 4, Reputation: 1
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    #1

    Aug 11, 2009, 08:12 AM
    Carrier furnace board HH84aa020
    I have installed a new board hh84aa020 on my furnace and the thermostat terminals are different. I have an A/C and need to hook them up. The new thermostat terminals are C,Y,GC,GH,R,W the old ones were.W,R,RH,RC,Y,C. The A/C wires were on C and Y.My Thermostat has Y,O,G,W,B,RH,RC. It is going to be 100 again any help would be great.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Aug 11, 2009, 08:31 AM

    Confused. There is a new and old and an "other" thermostat in the picture. Where three thermostats come from?

    The Fist two are mostly compatible with the exception of Gc and Gc and Rh and Rc. Rh and Rh were probably jumped and this becomes R.

    Gc and Gh I haveen't seen before, but it likely means the fan terminal for heat and cool modes. They can likely be jumped and called G.

    The last stat with O and B is likely a heat pump thermostat, but it might possibly be configurable to a conventional thermostat. Need a model number.
    cliffj64's Avatar
    cliffj64 Posts: 4, Reputation: 1
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    #3

    Aug 11, 2009, 09:00 AM
    Quote Originally Posted by KeepItSimpleStupid View Post
    Confused. There is a new and old and an "other" thermostat in the picture. Where three thermostats come from?

    The Fist two are mostly compatible with the exception of Gc and Gc and Rh and Rc. Rh and Rh were probably jumped and this becomes R.

    Gc and Gh I haveen't seen before, but it likely means the fan terminal for heat and cool modes. They can likely be jumped and called G.

    The last stat with O and B is likely a heat pump thermostat, but it might possibly be configurable to a conventional thermostat. Need a model number.
    The new furnace board HH84aa020 has the C,Y,GC,GH,R,W The old board burned up had W,R,RH,RC,Y,C. My current Thermostat has Y,O,G,W,B,RH,RC it is a LUX tx1500. I need the board to thermostat configuration.

    Thanks Cj
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #4

    Aug 11, 2009, 09:37 AM

    ODD. Instruction manual is here:

    http://www.xpedio.carrier.com/idc/gr.../58d-1si~1.pdf

    Thermostat
    C is used to supply power to the stat. Not used in Lux. Useful to cap at stat.

    O and B not used (used for HP systems)

    Jump Rc to Rh at stat and connect to R on board

    G of stat goes to Gc

    Note that there are a few setup options on the control board which I don't think you need to make.
    cliffj64's Avatar
    cliffj64 Posts: 4, Reputation: 1
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    #5

    Aug 11, 2009, 10:20 AM

    Kiss

    Thanks for the response, will hook up tonight

    Cj
    cliffj64's Avatar
    cliffj64 Posts: 4, Reputation: 1
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    #6

    Aug 13, 2009, 06:17 PM
    Kiss,

    What about the A/C wires
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