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[Ridgekid]

As you guys (and gals) know I'm always willing to help when and if I can. I just completed my research on how they wired my aquastat to prevent my heat pump from coming on when my OWB is in operation. I thought it was only fair I share this with my fellow CB owners.

There should be enough info to help you out in my gallery photos:
http://outdoorwoodfurnaceinfo.com/forum/index.php?action=media;sa=album;in=6

NOTES: (Not sure if this makes a difference)
1. This arrangement DOES NOT disable the radiant heating strips!! If I turn my thermostat up more than 2*, the heating strips come on. Of course I try to avoid this.
2. My heat pump is not zoned
3. My air handler is single speed.

[RSI]

I just looked at your pictures and either I am reading it wrong or it is not wired correctly.
Can you make a list of what wire colors are on what terminals at the thermostat and what the terminal labels are on the aquastat?

The green wire shouldn't be ground.

[Ridgekid]

Ok. What's the g terminal?

Green wire is on both thermostat and air handler on g terminal.

[RSI]

G is the fan only wire. What they should have done is run the wire that comes from RH on the thermostat the the common on the aquastat and the NC to the RH on the heat pump and the NO to the G on the heat pump. It is usually a good idea to remove the wire on the G that goes to the thermostat because some thermostats back feed and turn on the compressor.

If you want to have the aquastat disable the backup heat too, I can tell you how if you want.

[Ridgekid]

Thanks for the info. I updated my photos as not to say "ground" but G terminal.

I don't need to make any changes. Radiant heat is part of my back-up in case I have problems with the Green Dragon. Also (as you may know) the heat pump has a sump heater to protect the compressor. I don't want to do anything that would disable it. So far the way the dealer hooked it up has worked for me.

Thanks for your input!

[RSI]

Does the sump heater have anything to do with the thermostat? (if you have the thermostat turned all the way down so it doesn't run will the sump heater still kick in?)

[Ridgekid]

When the selector switch on the thermostat is in heat mode the sump heater is enabled. Or Iam I missing something?

Edit: Keep in mind my unit is 19+ years old.

[RSI]

I just looked it up and it looks like the Y is used on a heatpump instead of the W1 on some thermostats.


Do you have a W1 and W2 on the thermostat?

[RSI]

When the selector switch on the thermostat is in heat mode the sump heater is enabled. Or Iam I missing something?

Edit: Keep in mind my unit is 19+ years old.

From what I can find the heater is running all the time. It is wired direct to the 230v power.

[Ridgekid]

(check out the pic of my thermostat in gallery)

I do have a W. but not W1 or W2.  White wire in picture.

[RSI]

It is hard to see the letters in the picture. It looks like the white is on X.

That is one old thermostat.  Lol  (mercury switches in it)

[Ridgekid]

Yeah I know it's old. One time I wanted to replace it with a digital one but could never find one with the same terminal letters on it. That was quite a few years ago. They probably have one now?

Did you zoom the picture?  I can see all the letters and wires.

[Ridgekid]

Found this:

http://www.google.com/url?sa=t&rct=j&q=heat%20pump%20thermostat&source=web&cd=16&ved=0CGAQtwIwBTgK&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3D2vYSZk6FNnQ&ei=HGHtTvzdCoH50gGI3_TFCQ&usg=AFQjCNHL8UUh8b2v4VutAWbGCmdd4aV57g

But he doesn't mention x2 wire.

[Ridgekid]

Found this too:

http://www.honeywell-thermostat.com/faq-howtoinstallathermostat.html

[Ridgekid]

As you can tell I'm looking again. Trane has a smart thermostat for heat pumps but no pricing.

Have any recommendations???