Humidifiers and Dehumidifiers - Wiring Aprilaire 500M to Bryant Furnace circa 1979
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Mez08
01-14-08, 08:18 PM
I am replacing a powered humidifier with the 500M and I am trying to follow the wiring instructions provided with the 500M. See link:
http://www.alpinehomeair.com/related/500M_500A.pdf
My furnace low voltage terminals are as follows:
R - GH - W - GC - Y - C
Thermostat connected to R, W, GC, and Y terminals.
I don't have a HUM terminal (like on newer furnaces) or the A50, so could I power the humidifier solenoid with W terminal so that the humidifier is powered when the thermostat calls heat?
http://www.alpinehomeair.com/related/500M_500A.pdf
My furnace low voltage terminals are as follows:
R - GH - W - GC - Y - C
Thermostat connected to R, W, GC, and Y terminals.
I don't have a HUM terminal (like on newer furnaces) or the A50, so could I power the humidifier solenoid with W terminal so that the humidifier is powered when the thermostat calls heat?
Jay11J
01-15-08, 06:39 AM
Yes, you could piggy back on W and C for your humidifier.. Hopefully that transformer on the furnace is big enough to support the extra load.