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Old 01-10-2006, 01:22 PM   #1
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Wiring for Noma thermostat model THM303M


Is there anyone who can advise me how to wire a Noma model thm303m thermostat beyond the normal "G" "Y" "W" format? I currently have a General Electric Weathertron (runnuing a gas furnace with central air) with a total of 7 wires, but of course the connection "labels" between the two thermostats do not match up.
If you can help, I will send you the details of the corresponding connection "labels" and wiring identification for the two thermostats as I am anxious to start using the new thermostat.
Regards,
larry
January 27/06
I have solved my wiring problem re: the above request.


Last edited by larry s.; 01-27-2006 at 09:38 AM.
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Old 01-19-2006, 02:53 AM   #2
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Wiring for Noma thermostat model THM303M


Larry is the weathertron a heat pump?

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Old 01-19-2006, 01:34 PM   #3
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Wiring for Noma thermostat model THM303M


The Weathertron is the thermostat made by General Electric that was initially installed to run a Weathertron Heat Pump. The heat pump has long since been replaced by a Keeprite central air conditioner. The weathertron thermostat has been successfully running the furnace and air condtioner for several years. I have purchased the Noma thermostat as an upgrade in order to be able to utilize the set back feature.
If you can help I can forward the details of how the seven wires of the Weathertron thermostat are presenty connected and the identification of the terminals on the Noma via e-mail.
Thanks,
larry
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Old 01-26-2006, 08:08 AM   #4
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Wiring for Noma thermostat model THM303M


My G.E. Weathertron has worked well these many years, Installed, March, 1981. However, the motor control relay for the heat pump sticks. I cannot locate a parts list for the unit: BWB924 (2 ton). I would like to replace the relay before filling the contacts, again. It is a simple 26 volt relay I believe and should be easily located? At least once a part # can be found without opening up the unit in this cold weather.

Any help folks?
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Old 01-27-2006, 09:33 AM   #5
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Wiring for Noma thermostat model THM303M


Fred,
The relay you are referring to is on the heat pump unit - not on your furnace (if you in fact have a furnace) - is that correct?
I still have access to my old unit, so if the model # and part # matches I may be able to help.
larry
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Old 01-27-2006, 01:08 PM   #6
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Wiring for Noma thermostat model THM303M


Sorry to interject but I have GE forced air electric heat furnace that is controlled by the GE WeatherTron thermostat.

The heat pump was replaced by a conventional central air unit 10 years ago. So, during the winter months the furnace has to run on "emergency heat" (when turned on a small blue light comes on) activating the coils in the furnace...or the central air unit outside will turn on.

Now, my question is what programmable thermostat can I replace the WeatherTron device so I can still run it on "emergency heat" during winter?

No one seems to have a clue. Any info is very much appreciated.
Thank you.
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Old 01-31-2006, 12:33 PM   #7
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Wiring for Noma thermostat model THM303M


Quote:
Originally Posted by larry s.
Fred,
The relay you are referring to is on the heat pump unit - not on your furnace (if you in fact have a furnace) - is that correct?
I still have access to my old unit, so if the model # and part # matches I may be able to help.
larry
sorrrylarry for the delay, but yes the relay is on the top corner the first corner counter clockwize from the input wiring connections

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