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    Novice_dude's Avatar
    Novice_dude Posts: 3, Reputation: 1
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    #1

    May 18, 2007, 05:15 PM
    Thermostat wiring from Weatherton to Honeywell( RTH6300B)
    I have an existing old time mercury thermostat ( Trane Weatherton) which I am replacing with programmable Honeywell RTH6300B. Its very confusing how to connect these wires as the Weatherton thermostat has the following wires:
    G- green
    O- orange
    X2 - White
    W - white (X2 and W jumperd)
    Y - Yellow
    T- Tan
    R - Red
    B- Blue.

    and HoneyWell Thermostat has only these
    G, W, "not used" , Y, R, Rc and one at the bottom O/B.

    I would appreciate if anyone can tell how do I accomplish.
    Thanks,
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #2

    May 18, 2007, 07:37 PM
    There are a couple of smat guys, on this site and subject may tell give better info, for now, best I would guess. Red is common from transformer, White-Heat,Yellow-Cool, Green-Fan. Thermostat connecting Red with Green and Yellow, turn on Fan and Compressor.
    Pulling off cover of Air Handler,and On Cover(hopefully) have Diagram, Look at colors connected.
    Novice_dude's Avatar
    Novice_dude Posts: 3, Reputation: 1
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    #3

    May 23, 2007, 02:32 PM
    Can you elaborate more ?
    hvacservicetech_07's Avatar
    hvacservicetech_07 Posts: 1,083, Reputation: 75
    Ultra Member
    		  
    #4

    May 23, 2007, 04:53 PM
    What type of system do you have? Heat pump, gas furnace, A/C??
    Novice_dude's Avatar
    Novice_dude Posts: 3, Reputation: 1
    New Member
    		  
    #5

    May 24, 2007, 03:45 PM
    How can I tell the difference ? I think it would be Heat pump ( for heat ) and A/C ( for cool)
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