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replacing bad honeywell chronotherm 8611 thermostat w 6320u

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Posted: Tue Feb 2nd, 2010 06:17 pm

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1^st Post

paschal
Senior Apprentice Appliantologist

Joined:	Fri Jul 29th, 2005
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replacing a honeywell Chronotherm III T8611G1103 with a Honeywell th6320u which according to honeywell is one of three units they have that will work. This is a Trane XL-1400 single stage heat pump with the usual aux and emergency heat. (strips)The tstat is outside the air handler room, so was able to find what was actually being used. On the old tstat unit...the installer kept popping fuses and took hours to get it working, although it did work for five years...now it has gone crazy. Tired of killing power, pulling batteries to reset every couple days and the resets work more infrequent than before.
As it is wired now at tstat going to the air handler....From what is spliced through outside of it..

On the old 8611g

R is red wire
C is blue wire
Y is yellow wire
O is orange wire
X2 is Black wire

On the new th6320u the terminals available are L..... Y2......Aux/E combined....G.....O/B ......C.........Y.....R..... RC..... with R factory jumpered to RC.

Logically I would guess the

red wire to R/RC
Blue wire to C
orange to O/B
Yellow wire to Y
Black wire to Aux/E (From what I could tell in the install manual...that one bothers me)(well they all do)

Right or wrong?

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Posted: Wed Feb 3rd, 2010 03:40 am

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2^nd Post

ACtechGUY
Master Appliantologist

Joined:	Sun Sep 27th, 2009
Location:	New Orleans, Louisiana USA
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You got it right . On older trane setups they called the AUX/E (electric heat) terminal - X2. It came from outside to turn on electric heat in defrost mode.

Hope you feel a little less like you will blow something up now. :>

____________________
Don't know much. But learned early on, once you let the smoke out of a something electrical, you can never put it back in!! :oops:

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Posted: Sun Mar 14th, 2010 03:56 am

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3^rd Post

Bobice

Joined:	Sun Nov 30th, 2008
Location:	Bay Shore, New York USA
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Try this http://customer.honeywell.com/techlit/pdf/PackedLit/69-1920EFS.pdf

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Retired US Army Refrigeration Specialist / NYC Board of Education HVAC/R (Retired)
40 Years HVAC/R service, sales,installations. a tragedy has happen to me : http://web.me.com/zenzoidman/Bobice/

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Posted: Fri Mar 19th, 2010 01:37 am

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4^th Post

applianceman18007260692
Fellow, Academy of Sublime Masters of Appliantology

Joined:	Thu Nov 17th, 2005
Location:	Mobile, Alabama USA
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Nice pdf Bobby.

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Posted: Fri Mar 19th, 2010 10:17 pm

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ACtechGUY
Master Appliantologist

Joined:	Sun Sep 27th, 2009
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I justed looked at the Pdf. I don't know the thermostats by model number, but once I saw the photo......Ahhhhh....MY favorite thermostats....

I just love the honeywell focuspro line of themostats. Easy to install - 5 year warranty... not crappy...and downright inexpensive.

By the way on this thermostat you MUST NOT put in the batteries if you use the common wire from the unit. Batteries not needed.

____________________
Don't know much. But learned early on, once you let the smoke out of a something electrical, you can never put it back in!! :oops:

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Posted: Fri Mar 19th, 2010 11:39 pm

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6^th Post

applianceman18007260692
Fellow, Academy of Sublime Masters of Appliantology

Joined:	Thu Nov 17th, 2005
Location:	Mobile, Alabama USA
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Good tip AC

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"May the hinges of our friendship never grow rusty"
-old Irish saying

Buy me a Beer: http://web.me.com/zenzoidman/applianceman18007260692/

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