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infoskr 12-15-2008 06:37 PM

Honeywell VisionPro Thermostat
What to check on the wiring of Honeywell VisionPro TH8320 Thermostat on a Rheem Heat Pump System. The terminal designations are different on this new model as compared to my old Honeywell thermostat.

Old thermostat terminals:W3,W2,L,O,G,B,E,X,R,Y
New thermostat terminals: R,Rc,C,Y,Y2,Aux,G,E,L,O/B,S1,S2

Wiring in old thermostat------ Wiring for new Thermostat
White to W2-----------------??? Aux
Green to G-------------------G
Blue to B --------------------O/B
Brown to X-------------------C
Red to R----------------------R
Yellow to Y-------------------Y
Black jumped from W2 to E ---??? Jump Aux to E
Set menu item 0190 to 1 for O/B controls changeover valve in heat.

?Not sure about white and black jumper wire?

System Information:
Compressor:Rheem# RPKA-024JAZ
Air Handler:Rheem# RBHA-17J10SFAA

beenthere 12-15-2008 07:07 PM

You seem to have it correct.
Yes, jump from E to Aux.
And set to energize in heat.

infoskr 12-15-2008 07:25 PM

Honeywell VisionPro Thermostat
Thank you beenthere. I always like to be sure before I do things. You know do it once do it right. Can I discuss a few things about tweaking the programming on these pieces.

beenthere 12-15-2008 07:27 PM

Ask away.

infoskr 12-15-2008 07:44 PM


Originally Posted by beenthere (Post 198512)
Ask away.

Hope I am doing this correctly. This is my first time using a forum like this.
Looking @ setup function 0240 1st stage CPH, 0250 2nd stage CPH, 0270 emerency heat CPH it looks like Honeywell is prompting you to set these all to 9 CPH. is this a bit high. I am enjoying owning a heat pump out here in PA but I am still trying to understand them.

beenthere 12-15-2008 07:46 PM

Yea, 9 is way out of line.

I generally set cycle rates to 3 for compressor, aux heat, and emergency heat.
Some times, I'll set the aux to 2, if I want the aux heat to satisfy the heat call and not run the compressor 24/7 when the outdoor temp is below balance point.

Do you have 0170, set to 7.

infoskr 12-15-2008 07:49 PM

Yes that is what I was planning.

infoskr 12-15-2008 07:52 PM

On setup function # 0220 1st stage compressor cycle rate. Do you agree with Honeywell on setting this option to 3 CPH

beenthere 12-15-2008 07:53 PM

3 is a good rate.
It doesn't short cycle the compressor. Nor does it over shoot temp during mild outdoor temps.

infoskr 12-15-2008 07:54 PM

On setup function #0220 1st stage compressor cycle rate do you agree with Honeywell on 3 CPH.

infoskr 12-15-2008 07:55 PM

Sorry I'm posting the same thing twice. This is my first time doing this. I'll get the hang of it. It there anything else you like to see done on these Honeywells.

infoskr 12-15-2008 07:57 PM

See from your info your from PA also. So we are dealing with the same climate.

infoskr 12-15-2008 07:59 PM

I can't thank you enough for taking the time to share some insight on these units with me.

beenthere 12-15-2008 08:04 PM

If your going to use set back.
Set 0360 to 40(if you have the outdoor temp sensor).
And 0530 to 1, adaptive recovery on(weather you have the outdoor sensor or not).

So you don't use aux heat to recover with, more then is needed to.
Above 40 it won't use it at all, but under 40 it will if it has to.
Set back of more then a few degrees, isn't always advisable on a heat pump. Because if the aux heat is used, it cost more then it saves.

beenthere 12-15-2008 08:05 PM


Originally Posted by infoskr (Post 198540)
I can't thank you enough for taking the time to share some insight on these units with me.

No problem.

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