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Air Conditioning Central A/C Whole House Systems and Window A/C Units. Installations, Repairs, Maintenance, Services and Technical Advice

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Old 10-25-08, 10:49 PM
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Join Date: May 2006
Posts: 25
Another T stat wiring issue

Hello again,

I have a Rite Temp 7 day programable T stat (~2 years old) that I am switching over to a non programable Honeywell RTH3100C. I live in South Florida and my unit is a 2004 Rheem 3 ton. It has the outdoor evaporator and compressor unit and the indoor air handler. I wish I could tell you guys heat pump/single stage/double stage and all that but I realy dont know what all that means or how to tell. It is a typical air conditoner for south florida in which a/c is used 99.9 % of the time.

Anyway, the Rite Temp had the same wiring labels as my old dial t-stat so when i changed it the wiring was apples to apples. The wires from the unit are connected to the Rite Temp t-stat at:

G
Y
W
RH
RH to RC jumper.

The Honeywell has different wire labels but they give you a conversion chart (in () ) as follows:

E (X, X2)
Aux (W, W1, W2)
Y (Y1, M)
G (F)
O
L (F)
R (V, VR)
B (H)
C (B, X)

From the Rite Temp to the Honeywell, respectively, I can connect my wires as folows:

G to G
Y to Y
W to Aux

My dilema is I have no idea what my RH and RC is converted to the Honeywell setup. The chart does not have these options.

Any help would be appreciated.
Thanks
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Old 10-26-08, 08:27 AM
Jay11J's Avatar
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Join Date: Sep 2001
Location: Rochester, Minnesota
Posts: 12,925
The new thermostat is for heat pump, and it's not going to work right with your equipment.

You want the heat and cool only.

One I would suggest.
-RTH5100
-RTH110
-RTH1120

I know my store has the RTH110.
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