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    nhp103 Posts: 2, Reputation: 1
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    #1

    Dec 20, 2012, 02:20 PM
    Upgrade t-stat to wireless
    I have a gravity flow furnace currently connected by 2 wires to a battery powered t-stat. Due to the home / location of the t-stat, I want to upgrade to the Honeywell YTH5320R1017, which requires a "c" wire.

    Question: can I wire a 24v transformer so the common wire goes to C on the t-stat, the other wire from the transformer goes to the R slot and then the 2 wires from the furnace would wire to W and R (so there would be 2 wires into R)? Would I need a 24v relay switch?

    The YTH5320R1017 is a bit expensive and I don't want to fry it by connecting the 24vac incorrectly. Thanks!
    nhp103's Avatar
    nhp103 Posts: 2, Reputation: 1
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    #2

    Dec 21, 2012, 09:32 AM
    Anyone have any input on this? Seems like it should be intuitive but I don't want to fry the t-stat!
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