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    Ferg0007's Avatar
    Ferg0007 Posts: 2, Reputation: 1
    New Member
     
    #1

    Feb 18, 2008, 09:13 PM
    Replacing Weathertron thermostat to a Honeywell RTH3100C
    :confused: I am attempting to replace our Weathertron thermostat with a Honeywell RTH3100C. We have a Trane heatpump system. I am having trouble with the wiring. My wires don't match the 'less common wire designations' in the manual.
    I have the following wires on the Weathertron:

    R-red
    T-brown
    O-orange
    G-green
    Y-yellow
    X2-black
    B-blue
    W-white

    I'm not sure where the T wire should go.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #2

    Feb 18, 2008, 11:22 PM
    Quote Originally Posted by Ferg0007
    :confused: I am attempting to replace our Weathertron thermostat with a Honeywell RTH3100C. We have a Trane heatpump system. I am having trouble with the wiring. My wires don't match the 'less common wire designations' in the manual.
    I have the following wires on the Weathertron:

    R-red
    T-brown
    O-orange
    G-green
    Y-yellow
    X2-black
    B-blue
    W-white

    I'm not sure where the T wire should go.

    Here you go
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
    Ultra Member
     
    #3

    Feb 19, 2008, 06:57 PM
    You will not use the brown wire, tape it off and stick it in the wall. This "T" connection is only used on the older Trane or GE heat pumps for the outdoor anticipator with the weathertron thermostats. Mike
    booger3518's Avatar
    booger3518 Posts: 1, Reputation: 1
    New Member
     
    #4

    Jun 30, 2010, 05:58 AM
    Ok I am trying to go from a trane weathertron baystat 240 to a honeywell RTH3100c. Baystat wiring was Red-r,Tan-t Orange-o, Green-g,Yellow-y,White-X2jumped to w,Blue-b. I wired the honeywell Green-g, Yellow-y, Orange-o,Red-r,Blue-b,White-ejumped to aux, taped tan off. Powered up system cooling flashed 5min. Then air came on just sounded queiter than normal. However it did cool off and turn off in auto. Did I wire everything correctly?

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