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

    Nov 24, 2008, 02:06 PM
    Install of Honeywell RTh221B thermostat
    How do I install an Honeywell RTH221B thermostat?? I have a red, white and green wires on the old tthermostat. Where do the new terminals Y, G, Rh, Rc, and W connect to the old wires?? :)
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Nov 24, 2008, 02:10 PM
    Is this for heat only? A/C only? Or both?
    aliceinmaine's Avatar
    aliceinmaine Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Nov 25, 2008, 07:03 AM
    It is heat only on a water baseboard heat--no fan.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #4

    Nov 25, 2008, 07:08 AM
    List the old wire colors.
    List the exact model and brand of the old thermostat
    List exactly where the old wire colors were attached to the pld thermostat, I know you followed the thermostat instructions when it told you to identify and mark the old wires before you removed them.

    Your instructions for the new thermostst since you might have lost them,

    http://customer.honeywell.com/techli...69-2060EFS.pdf
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member
    		  
    #5

    Nov 25, 2008, 07:45 AM

    If the terminals are the same the only difference should be connect Rc to Rh and use as R.
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