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I recently purchased a Honeywell RTH7500d off of ebay so when i moved into my newly purchased house that I could so some energy saving changes.
I went tonight to install new t-stat but noticed when i removed the old Lennox one from the wall taht there is only 2 wires, white & black, and the instructions for the new t-stat mentions nothing about them. Did some searhing on the net but found a lack of required information to install to this system. Please help!
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for heat only
If its for heat only then run the wires to w and r..
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does it matter which colour wire goes to which connection?
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nope
no it does not.. If you are using only two wires.. NOw if there were more then it would matter.
regards,
kelvin
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Unless it is a power stealing thermostat then it does not matter.
-websy
