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

    Jan 23, 2010, 07:22 AM
    Honeywell thermostat wiring
    I have an existing old Homart thermostat for a old gas furnace. Only 2 wires enter the thermosat. I purchased a Honeywell RTH2510 programmable thermostat that seems to need more than 2 wires. Can this be used on my system and how to hook it up?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #2

    Jan 23, 2010, 08:03 AM
    Follow the directions in the thermostat box. All you need to connect is the R terminal to one wire and the W terminal to the other wire. Install batterys and follow the setup schedule.

    http://customer.honeywell.com/techli.../69-2381ES.pdf

    http://customer.honeywell.com/techli.../69-2380ES.pdf

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