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    Steve1honeywell's Avatar
    Steve1honeywell Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Feb 8, 2009, 10:29 AM
    Heating & Air Conditioning
    How DO you match up 3 wires (Green/Y/G), White (R/5), and Red (w/4) to a honeywell RTH 221B programmable that has places for a Y, G -- Rh and Rc (jumper) and W. This is a Zone Gas Hot Water Heat system, no AC.
    Thanks
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
    		  
    #2

    Feb 8, 2009, 11:05 AM
    Methinks your new t-stat isn't compatible with your system. Do the installation instructions cover this application? If not, you'll probably need something different.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #3

    Feb 8, 2009, 02:57 PM
    If your zone control is a White Rodgers the thermostat you have will not work.
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