Trane heat pump wiring - DIY Chatroom

steven7896 · 10-24-2009, 04:56 PM

I have a twg030 trane air handler and a xe1000 trane heat pump. The trane air handler has six wires as follows: 1 blue 1 green 1 red and 3 white(w1 w2 and w3). I am confused where the blue and white wires go. On the outside unit i have a odt and i am a little confused as to hook up all the wires out there also. They are blue, black, orange, yellow, blue, red, and brown. I have been to school for hvac and have worked on split units and ptac units for years but never heat pumps. This is more complicated than I imagined and I have no idea how to hook it all together. I am hoping someone can help me out! Thanks

Houston204 · 10-24-2009, 07:15 PM

What thermostat are you using? A Weathertron Baystat or Honeywell.

Houston204 · 10-24-2009, 07:18 PM

A Honeywell would not use the ODT (probably brown but color codes vary)

steven7896 · 10-24-2009, 07:35 PM

I am using a honeywell tstat. I have that diagram on my air handler but it does not tell me what the w1 w2 w3 and blue wire are. I was told the blue wire in the air handler was for common. The honeywell model is t8411r. I dont understand why it would matter which one i use for the odt. Wouldnt it still send signal outside and the odt would sense temp and send back in for aux heat? The more I dig the more I get confused! Thanks!

Houston204 · 10-24-2009, 08:05 PM

B is Common.

You will need to jumper stat W to stat Y.

I see the ODT now. I thought you were referring to the thermister, which wouldn't be used.
Connect stat E to fancoil W2 and W3 as shown in this diagram.

Houston204 · 10-24-2009, 08:16 PM

You will not use stat B (reversing valve energized to heat). Connect Stat C (common) to fancoil and heat pump B (common).

Gotta take the wife to dinner, back in a few...

Stat - Fancoil - Heatpump
R - R - R
W2 - W1 - Odt
O - NA - O
Y&W1 - N/A - Y
E - W2 & W3 - X2 (& other side of Odt)
G - G - N/A
C - B - B

steven7896 · 10-25-2009, 03:01 PM

Thanks! I am getting somewhere! Now the defrost board has a green light and it is blinking nonstop on off on off... There is a black wire going from the x2 on that board to the c2 on the odt. The number 2 on the odt is going to emergency and the number 3 is going to the w1 in the air handler. There are a total of three contacts on the odt. I am not sure if that is hooked up correctly or not. My new problem is this also, the ac and heat both turn the outside unit fan on but the compressor is not coming on. They are on the same contactor so it should be. There is a capacitor and time delay unit ( i think thats what it is) wired into it. I think it is wired right from the diagram you previously gave me. The compressor is brand new. There was a leak in the coils so a guy gave it to me after a pro company put the brand new compressor in. They guy got upset and put a whole new system in. I will take it all apart today and see if there if the leads are hooked up to the compressor. I dont understand why the fan would come on and not the compressor. Thanks Steven

Houston204 · 10-25-2009, 03:55 PM

If you chattered the contactor it may be out on thermal protection. Remove power and check if the compressor hot.

Flashheatingand · 10-25-2009, 05:28 PM

Stat- Fan Coil- Hp
R-R-R
W1-W-nothing
W2-W2,W3-Brown
o-nothing-o
Common-blue-blue
y-y-y if no y lead at the air handler, just y-n/a-y

it sounds as if you are energizing the defrost mode inadvertantly.
you will see on the black lead at the heat pump, there is a special note and the black lead is some type of option. I don't know what that note is, but I don't believe you need to hook it up.

beenthere · 10-25-2009, 07:58 PM

Quote:

Originally Posted by Flashheatingand

Stat- Fan Coil- Hp
R-R-R
W1-W-nothing

y-y-y if no y lead at the air handler, just y-n/a-y

Not with a T8411R.
It doesn't energize Y on a heat call.
W1 of stat must be jumpered to Y.

Houston204 · 10-25-2009, 08:49 PM

I agree, Y must be jumpered to W1 as shown in the diagram and as I stated when I posted the diagram.

steven7896 · 10-26-2009, 07:23 PM

Thank you Houston, so far so good. Heres the update. I bought this from a guy who said it was a brand new compressor and then there was a leak so he got mad and bought a new system. Well I found the leak weeks ago and fixed it, no biggie. Unfortunately this new compressor burned out I guess during the two days he had it running. Anyways I just finished putting a new compressor in and everything seems to be working. I am a little unclear how to charge the unit so I put it on air conditioning and charged it using my super heat and im getting a 18 degree temp drop so I assume that I did it right. On heat it energizes the outside unit but within a few moments it turns on the aux heat. So it looks like that is the new issue. Could it be something from my previous post where i wired up the ODT? I wired up the tstat like Houston said to do it. Any thoughts? Thanks

beenthere · 10-26-2009, 07:33 PM

I don't think W2 of stat should go to W1 of air handler, when using outdoor stat.
If it does. Then when you raise the temp more then 2° above room temp, the aux heat will come on.

steven7896 · 10-26-2009, 08:42 PM

Okay so I will try to undo w2 on the tstat and see what happens. You are right if it is set 2 or more degrees over room temp it kicks on the aux heat. Should I get a better tstat? Whats the best one to get, and if I am getting one should I get a programmable one? Not bad as I only have like 200 bucks in this whole system so far. Gotta love craigslist and friends with parts! and dont forget this forum, without Houstons help I dont think I ever would have got it done.

beenthere · 10-26-2009, 08:46 PM

Don't undo it at the stat. Undo it at the air handler.