AS Heat Pump thermostat wiring

Reply

  #1  
Old 05-09-15, 01:50 PM
Member
Thread Starter
Join Date: May 2015
Location: United States
Posts: 3
Received 0 Votes on 0 Posts
AS Heat Pump thermostat wiring

I am a DIY installing a new American Standard 3T heat pump/air handler model GAF2A0A36S. I am currently trying to hook up the low voltage control lines for the thermostat and heat pump. Per the “Air Handler Hook-up Diagram Heat Pump” there should be 7 pigtails for this attachment. Per the “Wiring Diagram for GAF2A0A36S Air Handlers”, there should be only 4 pigtails. My machine has only 4 wires WH, GR, RD & BL as shown on the wiring diagram.

Any ideas on how to wire this bad boy?
I appreciate any help available/provided.
Name:  AC 001.jpg
Views: 61301
Size:  36.7 KBName:  AC 002.jpg
Views: 41825
Size:  39.3 KB
 
Sponsored Links
  #2  
Old 05-09-15, 11:46 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 53,654
Received 421 Votes on 394 Posts
Welcome to the forums.

I was finding conflicting information. My partner, Houston, will probably have a better idea of your wiring.
 
  #3  
Old 05-10-15, 01:34 PM
Houston204's Avatar
Forum Topic Moderator
Join Date: Oct 2009
Location: Texas
Posts: 7,384
Received 11 Votes on 9 Posts
If you do not have YLo, O or Y at the air handler these wires would bypass the air handler and go from the stat to the heat pump. (I doubt that you have Y1 and Y2 in use with that air handler)

What is the model number of the heat pump and the stat?
 
  #4  
Old 05-10-15, 05:23 PM
Member
Thread Starter
Join Date: May 2015
Location: United States
Posts: 3
Received 0 Votes on 0 Posts
The compressor is an American Standard 3.0 Ton 13 SEER Heat Pump Condenser model 4TWB3036C10. I haven't unboxed it yet but can pull the manuals to see if there is any additional info or diagrams should you need it.

You are saying (at least at this moment) to connect:
FROM THERM -- AT HP
Orange -- Orange
Yellow -- Yellow???
and ignore Orange at AH since there is none.

Incidentally I will have a qualified AC guy make braze the copper and charge/test unit. I am pretty good but I do know when to call in the pros.

Thanks for the quick turn around on assistance. I am always impressed by how helpful the "community" can be in the technical world.
 
  #5  
Old 05-10-15, 05:40 PM
Houston204's Avatar
Forum Topic Moderator
Join Date: Oct 2009
Location: Texas
Posts: 7,384
Received 11 Votes on 9 Posts
Yes,
Stat Y - Heat pump Y
Stat O - Heat pump O
 
  #6  
Old 05-10-15, 07:37 PM
Member
Thread Starter
Join Date: May 2015
Location: United States
Posts: 3
Received 0 Votes on 0 Posts
Solved

Great job Houston204!

I went over to the house and pulled the H-P manual. Sure enough they had a different diagram in that manual. It seems there are (at least) two different models of the GAF2 Air Handlers, and the installation instructions that came with mine failed to mention that it was not for the version that they had sent ...of course!

As you can see in the attached diagram your solution was dead on and if I had just been wise enough to pull the H-P manual I would have found the solution myself. Hopefully this post with the 3 diagrams will save someone else from struggling with the same issue.

Again thanks for your great and very quick response, over a weekend none the less. It is much appreciated.Name:  AC 003.jpg
Views: 2054
Size:  37.4 KB
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes
 
Ask a Question
Question Title:
Description:
Your question will be posted in: