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    sabby1959's Avatar
    sabby1959 Posts: 4, Reputation: 1
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    #1

    Oct 24, 2014, 05:34 PM
    Replace Baystat240 Thermostat
    I want to Replace a Baystat 240 3AAT80B1A1 with a White-Rodgers 1F89-211 but I am not sure how to wire it. I have attached a pic of my Baystat, along with a link for the WR Thermostat. Thanks! Name: 152.JPG Views: 6776 Size: 1.02 MBhttp://www.emersonclimate.com/Docume.../0037-6997.pdf
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    bitters Posts: 348, Reputation: 12
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    #2

    Oct 25, 2014, 11:59 AM
    Open up your furnace and find the thermostat wires. Let us know what color wire is attached to what terminal.
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    #3

    Oct 29, 2014, 04:27 PM
    Quote Originally Posted by bitters View Post
    Open up your furnace and find the thermostat wires. Let us know what color wire is attached to what terminal.
    First, I changed to a Honeywell RTHL2510/RTHL2410 Series since the White-Rodgers stat was not programmable.

    Okay... here goes! I have no clue where the wires go in the Central Electric Furnace 3500A812 . There are two sets of thermostat wires and both blacks and one green is not used. I noticed the blue and the green thermostat wires are connected to 3500-5841 AC Control Pkg, and the yellow wires on that pkg are cut. I do have a heat pump.


    The terminals for the Honeywell are B, O ,G, Y, W/AUX, NOT USED, R, RC The R and RC have a jumper wire.
    ,
    Enclosed are some pics... thanks for your help!
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    bitters Posts: 348, Reputation: 12
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    #4

    Oct 30, 2014, 12:36 PM
    The pic's are so large I can't make any sense out of them. Is there a terminal strip in the furnace?
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    #5

    Oct 30, 2014, 03:57 PM
    Quote Originally Posted by bitters View Post
    The pic's are so large I can't make any sense out of them. Is there a terminal strip in the furnace?
    Holy smokes, you are right! Can you possibly save them and view them, or CTRL -

    And where would I find the terminal strip? Is it behind the panel where the Sequencer is?
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    bitters Posts: 348, Reputation: 12
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    #6

    Oct 31, 2014, 08:21 AM
    Tried to save them and view, failed. The more I looked I don't think the furnace has a terminal strip.
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    #7

    Oct 31, 2014, 04:06 PM
    Quote Originally Posted by bitters View Post
    Tried to save them and view, failed. The more I looked I don't think the furnace has a terminal strip.
    It may not. The heat pump is a Trane TWR036C100A1... 1993 and the furnace is a Coleman 3500A812. I don't know. The way I understand it, the O and B is for the reversing valve, and the new thermostat says NOT to connect the B if there is a separate O wire. I don't know, seems kind of odd since the B wire is what is connected to the AC Pkg. I will also leave the Black wire disconnected since it was not connected on the BAYSTAT240. I kind of have a feeling everything may have to be replaced soon. Hopefully it will get me through the winter. I had a technician out here last year on New Year's Eve and NY day and he replaced the Sequencer, and Defroster. I have several burned wires and he told me not to be concerned about them... well, I am concerned!
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