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[GMCnet] Atwood 2450 Hydroflame Furnace T-Stat Wiring [message #67340]

Sun, 13 December 2009 12:07

Alan LaVoisne

Messages: 51
Registered: September 2009
Location: Ortonville, MI

Karma: 0

Member

Hi all:
I am installing an Atwood Hydroflame furnace in my GMC. I am trying to
figure out if the T-Stat need 2 or 3 or 4 wires. Does anybody have one of
these installed?

This is the Thermostat.
http://www.atwoodmobile.com/heating-systems/digital-thermostat.asp
Manual:
http://www.atwoodmobile.com/manuals/furnaces/MPD%2031492%20SP%201.08.pdf

The wiring diagram shows +12v, Grnd, and TH from furnace.

The furnace wiring shows +12v, -12V, and two wires labeled Thermostat.

I am thinking I need to run the two wires for the thermostat plus an extra
wire carrying 12VDC constant,

The furnace is 2 stage and is supposed to switch to high and low output
automatically but the thermostat can also lock in high or low and force the
furnace to run at those speeds.

Thanks. You guys are great.

Alan LaVoisne
75 Glennbrook.
Ortonville, MI
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1975 26' Glenbrook Mostly Original Ortonville, MI

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