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Thermostat Installation Westinghouse (Nordyne) FT5BD-030K


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#1 DuBose Griffin

DuBose Griffin

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Posted 02 October 2011 - 06:54 PM

Greetings,

We currently had a Honeywell Digital TH5220D1003 (non programmable) thermostat (link here: Product) on our downstairs Westinghouse (Nordyne) FT5BD-030K HVAC (link here: WESTINGHOUSE FT5BD-030K Heat Pumps). There is a separate unit for the upstairs. It was working fine. Then we wanted to install a new honeywell digital thermostat (model RTHL2310) that was programmable (link to product here: RTHL2310B | 5-2-Day Programmable Thermostat).

I removed the wires and labeled them. They are either:

Conventional (which I assumed to the correct one)
R (red wire), Y (yellow wire), C (blue wire), W (red wire), G (green wire), W2 (white wire)

OR

Heat Pump
R (red wire), Y (yellow wire), C (blue wire), O/B (red wire), G (green wire), Aux (white wire)

Next I connected the new thermostat as follows matching the conventional labels above:
R (red wire), W (red wire), Y (yellow wire), G (green wire). I did nothing with C (blue wire) or W2 (white wire).

The result was that the unit just blew warm air. I then hooked the old thermostat back up and still no cooling.

So I believe the Westinghouse is not working period and I do not have the wiring correct.

Any direction would be greatly appreciated!

Thank you,
DuBose Griffin


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#2 jb8103

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Posted 04 October 2011 - 04:49 AM

Odd T-wire you've got there. With two reds it would be easy enough to get them turned around. Verify color codes at the the compressor (or air handler) terminal strip. Verify which Red is hot at the thermostat with a multimeter. You're looking for 24VAC to Common.

Edited by jb8103, 04 October 2011 - 05:00 AM.

First, do no harm.




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