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    pad41ken's Avatar
    pad41ken Posts: 6, Reputation: 1
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    #1

    Oct 22, 2010, 03:55 PM
    White rodgers heat pump thermostate 2477c which terminal is ground
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Oct 22, 2010, 04:14 PM
    Have you got the install instructions? I never seen a tstat that needed a ground
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    pad41ken Posts: 6, Reputation: 1
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    #3

    Oct 22, 2010, 05:00 PM
    Comment on wmproop's post
    Yes I have the instructions, it does not specify which terminal is used for the common. (c)
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    wmproop Posts: 3,749, Reputation: 91
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    #4

    Oct 22, 2010, 05:28 PM
    OK,, common,that's not a ground,, can you tell us the lables on/beside each post of the WR tstat
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    pad41ken Posts: 6, Reputation: 1
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    #5

    Oct 22, 2010, 05:38 PM
    Comment on wmproop's post
    I have r,y,g,e,o,b,L,x1,w2
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    wmproop Posts: 3,749, Reputation: 91
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    #6

    Oct 22, 2010, 05:53 PM
    What does the instruction sheet tell you the b post is used for?
    Some tstats don`t need or call for a common post,the common post is mostly used to return the low voltage (24V) back to circuit board so as there will be no need to use or worry about changing batteries
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    pad41ken Posts: 6, Reputation: 1
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    #7

    Oct 22, 2010, 05:58 PM
    Comment on wmproop's post
    B is for the reversing valve if energizing in heat.
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    #8

    Oct 22, 2010, 06:29 PM
    Comment on wmproop's post
    O is for the reversing valve if energized in cool
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