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Thread: CT-100 install

  1. #1

    CT-100 install

    The diagram in the manual is close to the 4 write but I have an extra "O" wire... is it ok to just hook the wires up to the same terminals on the CT-100? As You can see I have C, R, W, Y G, O....Here is a picture of the old thermostat.

  2. #2
    Looks like you have a Heat Pump

    Here is a Wire Reference Guide:
    Name:  wire reference table.JPG
Views: 340
Size:  60.7 KB

    Here is the CT100 Manual For others I know you have it:
    CT100_Install Guide (1).pdf

    And check out this thread covers a lot about your question:

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