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-   -   Install of Honeywell RTh221B thermostat (https://www.askmehelpdesk.com/showthread.php?t=284729)

  • Nov 24, 2008, 02:06 PM
    aliceinmaine
    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?? :)
  • Nov 24, 2008, 02:10 PM
    stanfortyman
    Is this for heat only? A/C only? Or both?
  • Nov 25, 2008, 07:03 AM
    aliceinmaine
    It is heat only on a water baseboard heat--no fan.
  • Nov 25, 2008, 07:08 AM
    hvac1000
    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
  • Nov 25, 2008, 07:45 AM
    KISS

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

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