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    lexieric's Avatar
    lexieric Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Jan 13, 2008, 12:11 PM
    Wiring for Noma Programmable Thermostat
    I just bought a Noma Programmable Thermostat from Canadian Tire. My original thermostat was called a York and it is old with mercury capsules inside.

    The original wiring is as follows:
    Green to G
    Yellow to Y
    Orange to O
    Brown to B
    White to W
    Red to R
    Beige to X

    Note that the new thermostat can handle a humidifier but our furnace does not have a humidifier so this functionality will not be used.

    The new Noma Programmable Thermostat has only the following wire designations:
    W
    RH
    RC
    Y
    H1
    H2
    C (has no screw)
    G

    I assume that:
    white will go to W
    yellow will go to Y
    green will go to G
    but how do the other wires go?

    Many thanks for your help.
    rtw_travel's Avatar
    rtw_travel Posts: 347, Reputation: 36
    Full Member
    		  
    #2

    Jan 13, 2008, 12:25 PM
    What is the thermostat controlling? If it is just a furnace (no a/c, no humidifier), then you should only need White and red to W and RH. You can also check on the furnace side of the wire to see what everything is connected to there
    lexieric's Avatar
    lexieric Posts: 3, Reputation: 1
    New Member
    		  
    #3

    Jan 13, 2008, 01:33 PM
    The furnace is used for heat, AC, and when below -15C a heat pump kicks in.
    Thanks!
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