Heat Pumps and Electric Heating - Help wiring Honeywell VisionPro TH8321U1006

Hi! In searching for help I notice that people have posted for help on how to wire thermostats. I hope I can get some help. Currently I have not wired anything but just made notes of what I currrently have. When I had my unit serviced, the technician told me I have a 1 stage cooling/ 2 stage heat pump setup. It also has an auxilary heat light. This unit handles up to 3 heat/ 2 cool conventional or heatpump.

The wiring diagram in the instructions do not match the current wiring so here I am.

I currently have an old mechanical mercury weathertron thermostat. It is currently wired as follows:

G - Black wire
O - Orange Wire
X2 - White jumper wire comming from W
Y - Yellow wire
T - Brown Wire
R - Red wire
W - White wire and Jumper wire going to X2
U - None but notes a hard circuit board jump from W
F - None
B - Blue wire

The wiring instructions that came with the VisionPro show the following directions for a 2H/1C Heat Pump with auxilary heat)

L - Equipment monitor
E - Emergency heat relay
Aux - Auxiliary heat relay (Heat 2)
Rc - Power
R - R+Rc joined by jumper
O/B - Changeover Valve (In setup can set this for cooling or heating. Which is correct? Cooling is the default)
Y - compressor relay
G - fan relay
C - 24VAC Common
S1 - optional outdoor remote sensor ( I have none)
S2 - "

Based on some searches, here is my best guess:

L - Equipment monitor - I have no idea what if anything goes here

E - Emergency heat relay - See Note
Aux - Auxiliary heat relay (Heat 2) - See Note
NOTE: I think the White wire from W goes to one of these but not sure which. I know W was jumped to X2 so I'm confused on this part.

Rc - Power - Red wire from R
R - R+Rc joined by jumper

O/B - Changeover Valve - Orange Wire from O

Y - compressor relay - Yellow wire from Yellow
G - fan relay - Black wire from G
C - 24VAC Common - Blue wire from B
S1 - No wire
S2 - No wire

I also believe the Brown wire on T is not needed any longer.

I have idea what to set the changeover valve to in the setup. Heat or Cool?

Thanks for any help you can give me. I will check back often in case I need to provide any additional information.

An additional question once I get this wiring correct and do the setup. How do you determine how to set the cycles per hour? There are a lot of options for these.

Must be the Gators thing :)

You are correct, wire it as you have surmised.

T is not needed, it's a Trane outdoor temp sensor that the Vision pro doesn't care about.

L is an input to the VisionPro that the Trane doesn't have.

E and Aux on the new stat are X2 and W on the old stat. Jumper and white wire.

Changeover valve is energized in cooling.

Which stat do you have? 8000, 6000, 5000?

Leave cycles per hour alone. What it does is limit the amount of times the compressor can come on in 1 hour. 3 should be fine.

Did I answer everything or is there more?

Oh, Go Gators!!!!!!!!!!!!!!!!!!!!!!!

Thanks jarredsdad! I wired it up just as I planned including the jumper and went through the tests. Everything appears to be working great.

When I went through the setup, I left everything the same except for the following:

0170 - Changed to 7 (2 heat/ 1 cool heat pump with aux heat)
0190 - I did leave this to default of 0 (O/B terminal controls valve in cooling)
0280 - set backlight to always on
0300 - Changed to 1 (Automatic change over Heat/Cool/Auto/Off)

If any of these are wrong or should be changed (including defaults I didn't mention) please let me know.

Oh, I have the 8000 TH8321U and Die hard Gator fan. Alumni - Engineering school.

Thanks again for the response! I really appreciate it!

Might check 0330 this is daylight savings, set it to 2.

And unless you change your filter every 30 calander days you may want to change 0500 to 2 as well. This will remind you to change the filter every 30 days of actual run time.

Might check 0330 this is daylight savings, set it to 2.

And unless you change your filter every 30 calander days you may want to change 0500 to 2 as well. This will remind you to change the filter every 30 days of actual run time.

I actually did change those to what you stated. I missed listing them. Looks like I'm good!

Thanks again for you help!

I have an electric heat pump with auxiliary heat and a Honeywell 8000 Series Pro thermostat (TH8320U1008) that I installed last year. I've noticed that during the winter, the heat cycles on for a long time (sometime all night). We have tall ceilings in our house and it's cold outside, but is there a way to make an adjustment to the settings so that it doesn't come on for so long or frequently? If so, which particular settings would make that change for me? Thanks

I have an electric heat pump with auxiliary heat and a Honeywell 8000 Series Pro thermostat (TH8320U1008) that I installed last year. I've noticed that during the winter, the heat cycles on for a long time (sometime all night). We have tall ceilings in our house and it's cold outside, but is there a way to make an adjustment to the settings so that it doesn't come on for so long or frequently? If so, which particular settings would make that change for me? Thanks

Is the heat pump a single or two stage?

Outdoor senor used in this set up, and if you do have it, what is the set up?

Heat pump is keeping up all it can when it's cold out.. (What's the temp outside?)

When our temps are down to -5 and colder, mine runs non stop, and that's fine.. let it run! it's better on the equipment to run than stop and go all the time.

Could change to make it run longer and not as often... but I'll wait till you post back with more info.

With regard to the B and O terminals.....you have to know whether your heat pump needs the reversing valve energized in COOL or in HEAT. If energized in COOL, you would use the O terminal, and if enrgized in HEAT you would use the B terminal.

Just for some examples, Goodman heat pumps energize the reversing valve in COOL. Rheem energizes it in HEAT.

Jay,

I'm not sure if the unit is 1 or 2 stage; was here when we moved in and I'm not sure I have any of the Owner's manuals. We do not have an outdoor sensor for the unit. And it's been cold, but not too cold. Mostly down in the teens and some single digits at night, but not quite breaking 0. Thanks.

Make, Model, and Serial numbers for indoor and outdoor?

Like Jarrad said, we need more info, and we can help you what you got there for sure.