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Old 08-12-2009, 06:31 AM   #1
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Upgrade Duo-Therm thermostat to a Honeywell RTH230B Thermostat

I need help in determining how to wire the Honeywell Thermostat.

This is the wiring for the Honeywell... Did not have an English wiring diagram that came with it. It was missing from the package. I got the thermostat at a yard sale. I found this wiring on the internet by a Google search.

RH...heating power supply
RC...cooling power supply
W....heating power supply (I assume W= white)
Y....cooling signal (I assume Y = yellow)
G...fan (I assume G = green)

This is the existing wiring for the Duo-Therm...
Green....GND
Blue...hi fan
Brown...fan (I assume this is low fan)
Red... 7.5 (I assume this is voltage)
White...heat
Yellow...cool

I don't need low fan capability. I keep mine in the auto setting.

Could someone please tell me how to wire the Honeywell. I am not very keen on electrical stuff like this and would sure appreciate some help.
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Old 08-12-2009, 05:21 PM   #2
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Actually do a search on hunter digital thermostat on google, and you'll find a good write up with detailed instructions for this.

Best of luck!
Chris
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Old 08-14-2009, 06:25 PM   #3
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I have found several articles about this but none of the wiring is like mine, so I am still looking for some help. Thanks
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Old 08-15-2009, 08:42 AM   #4
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Take a look HERE at iRV2 member Ken Lenger's installation of a Honeywell thermostat in his RV's heating/cooling system. Although Ken's is a one-off installation, his schematic should give you some clues about what wire goes where.

Rusty
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Old 08-21-2009, 09:33 AM   #5
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Never could get the Honeywell to work ...So went to a Hunter and all is well.
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Old 09-05-2009, 03:00 AM   #6
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If you PM me your email address, I have the instructions that have both the duo-therm instructions and the coleman, so it should help out. The Honeywell terminals are the same as the Hunter RH/RC, W, Y, and G, so they should work just fine (allegedly).

I just got my hunter installed today and it was fairly simple.
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Old 09-06-2009, 10:04 AM   #7
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doing a search on hunter digital thermostat on google would be a great move on that...


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Old 12-07-2009, 08:22 PM   #8
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Quote:
Originally Posted by WindRVer View Post
If you PM me your email address, I have the instructions that have both the duo-therm instructions and the coleman, so it should help out. The Honeywell terminals are the same as the Hunter RH/RC, W, Y, and G, so they should work just fine (allegedly).

I just got my hunter installed today and it was fairly simple.
I have been pulling my hair out trying to get my Colman heat pump wired to a new Hunter thermostat. Any words of wisdom to mike@marshconsulting.org would be most appreciated. Mike
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