Wiring between Trane XL824, TEM6, and XR17

Reply

  #1  
Old 04-27-15, 10:04 AM
Member
Thread Starter
Join Date: Mar 2006
Posts: 6
Received 0 Votes on 0 Posts
Wiring between Trane XL824, TEM6, and XR17

Would you guys please let me know if you think that this system was wired and set up properly? I think they may have wired it up as though it was hooked up an older thermostat.

Last week I had the following installed:
Trane XR17 2 stage (single compressor) heat pump, 3 ton
Trane TEM6 variable speed air handler, 3 ton
Trane XL824 thermostat (wifi, humidistat)


I tried running the blower in Test Mode at both 50% and 100%, and both times it barely ran. I guess that means the fan isn't being controlled by the XL824 thermostat. So, I peeked in the air handler to inspect the wiring. I found that the BK - R jumper was still intact, and that the thermostat's BK was not connected to the air handler's BK. Here's how it's currently wired:

Name:  Current Wiring.jpg
Views: 7886
Size:  27.6 KB

I thought that the thermostat's BK should have been connected to the air handler's BK, and that the jumper between BK and R in the air handler should have been cut. One of the diagrams that came with the heat pump indicates that there should be a jumper between the R and O on the air handler, but I'm not sure.
 
Sponsored Links
  #2  
Old 04-27-15, 10:56 AM
Member
Join Date: Feb 2014
Location: USA
Posts: 2,104
Received 0 Votes on 0 Posts
I wouldn't jump R to O. O will go to the reversing valve. If you jumper it the valve will be in cool mode all the time. According to the wiring diagram BK is not used.
 

Last edited by skaggsje; 04-27-15 at 11:04 AM. Reason: added info
  #3  
Old 04-27-15, 12:55 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 52,627
Received 339 Votes on 317 Posts
BK is associated with blower speed but I couldn't find any info as how it pertains to the TEM6 variable speed air handler. One would think the jumper between R and BK would keep the blower at full speed.

My partner Houston may know the answer to that one.

I do agree with skaggsje in that there should not be a jumper between R and O.
 
  #4  
Old 04-27-15, 07:28 PM
Houston204's Avatar
Forum Topic Moderator
Join Date: Oct 2009
Location: Texas
Posts: 7,372
Received 10 Votes on 8 Posts
It looks like the BK jumper does not get cut with this application according to the heat pump manual since stat Y1 connects to air handler Y1.

The R to O jumper is for the 16seer and doesn't look like it would apply in this application.
It would apply in applications that require stat Y1 to connect to air handler Y/Y2 because of a 2 step scroll compressor that unloads to 80% operation.


AHU... page 38
http://tranepennohio.com/secure/tech...r2014%203T.pdf


heat pump...
http://www.trane.com/content/dam/Tra...22-1886-02.pdf

stat...
http://www.bayareaservice.com/store/XL824_Install.pdf
 
  #5  
Old 04-27-15, 07:32 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 52,627
Received 339 Votes on 317 Posts
You gotta just love it.... Houston has all the links.
 
  #6  
Old 04-27-15, 07:37 PM
Houston204's Avatar
Forum Topic Moderator
Join Date: Oct 2009
Location: Texas
Posts: 7,372
Received 10 Votes on 8 Posts
It looks like this site has quite a few pdf's...

Product Literature
 
  #7  
Old 04-27-15, 07:45 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 52,627
Received 339 Votes on 317 Posts
Thanks.... just bookmarked.
 
  #8  
Old 04-27-15, 08:13 PM
Member
Thread Starter
Join Date: Mar 2006
Posts: 6
Received 0 Votes on 0 Posts
According to diagram 1 in the stat guide, BK, Y1, and Y2 are all connected from the stat to the air handler and Y 1 and Y2 are connected from the air handler to the heat pump (Y2 because it's two stage HP).

The heat pump manual diagram says "typical thermostat", but I don't think that the 824 is a typical stat.

What does it mean that test mode on the tstat cannot control the fan?
 

Last edited by GrillMouster; 04-27-15 at 08:44 PM.
  #9  
Old 04-27-15, 08:42 PM
Houston204's Avatar
Forum Topic Moderator
Join Date: Oct 2009
Location: Texas
Posts: 7,372
Received 10 Votes on 8 Posts
A factory diagram with your 3 components would be of great assistance here.

You have a heat pump and diagram 1 of the stat manual is not a heat pump.
Diagram 16 is a heat pump application and it does show the BK jumper cut but it is not your air handler.

Name:  Trane 824 with Tam7 and heat pump.jpg
Views: 19084
Size:  47.3 KB

Or your heat pump.
Name:  Trane 4TWR low voltage.jpg
Views: 17322
Size:  45.1 KB
 
  #10  
Old 04-27-15, 08:55 PM
Houston204's Avatar
Forum Topic Moderator
Join Date: Oct 2009
Location: Texas
Posts: 7,372
Received 10 Votes on 8 Posts
Trane manuals have an ID number on the first and last page. Do you have the installation manual for your air handler?
 
  #11  
Old 04-27-15, 09:06 PM
Member
Thread Starter
Join Date: Mar 2006
Posts: 6
Received 0 Votes on 0 Posts
Yes, I'll them post tomorrow. Thanks for the help, by the way.

Here's a link to a photo I took this morning of the wiring diagram in the air handler manual:

https://docs.google.com/file/d/1t3cQS5Xs6AKRRktah7Ax67TwPFcLtpe8cw/edit?usp=docslist_api

It sounds to me like you're saying that the stat won't be able to control the fan speed for dehumidification.
 
  #12  
Old 04-27-15, 09:45 PM
Houston204's Avatar
Forum Topic Moderator
Join Date: Oct 2009
Location: Texas
Posts: 7,372
Received 10 Votes on 8 Posts
I have seen this issue with heat pumps but I would like to verify it.
 
  #13  
Old 04-28-15, 11:34 AM
Member
Thread Starter
Join Date: Mar 2006
Posts: 6
Received 0 Votes on 0 Posts
Okay, Houston, here it is. The Air Handler model is TEM6A0C36H31SAA. The installer manual has "18-GF74D1-1B-EN 02Dec2014" on the first and last page. On page 9 it has two diagrams: one for "Single Stage, Cooling Only", and nother for "Single Stage, HP". Pae 10 has one for "2 Stage, 2 Step, Cooling Only", and "2 Stage, 2 Step, HP". Here's an image of the diagram for the last one:
Name:  AH Instr.jpg
Views: 4971
Size:  29.9 KB

I'm trying to post other pages, including the dip switch instructions, but the site is failing upload.
 

Last edited by GrillMouster; 04-28-15 at 11:53 AM.
  #14  
Old 04-28-15, 11:39 AM
Member
Thread Starter
Join Date: Mar 2006
Posts: 6
Received 0 Votes on 0 Posts
By the way, the installer manual document number for the Heat Pump is 18-BC90D1-2 (12/13). The model number for the heat pump itself is 4TWR7036B1000BA.
 

Last edited by GrillMouster; 04-28-15 at 11:56 AM.
  #15  
Old 05-28-15, 06:34 PM
Member
Join Date: May 2015
Posts: 1
Received 0 Votes on 0 Posts
If you have the installation guide for the XL824 use the wiring guide in there. You should connect the bk at the t-stat and air handler. You need to cut the R to BK jumper. Wire Y1and Y2 straight from the t-stat to the outdoor unit. Don't connect to air handler. In the technician set up in the XL824 enable dehumidification. Then setup fan on cooling to enhanced, cooling off delay at 30sec at 50%. Then setup fan on heating to enhanced and heating off delay to30sec at 50%. Why not the Tam7 air handler? Better unit.
 

Last edited by Bgrayny1; 05-28-15 at 06:50 PM.
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: