Common maker wont work.

Reply

  #1  
Old 10-26-18, 07:40 PM
B
Member
Thread Starter
Join Date: Oct 2018
Location: Canada
Posts: 3
Received 0 Votes on 0 Posts
Common maker wont work.

Honeywell RA89A relay controls a circulating pump.
This relay doesn't expose C wire. I soldered my own.

When i connect a thermostat directly to RED, WHITE, BLACK (common) everything works.

Using a FAST-STAT common it does not, what could be the reason?
I bypassed the thermostat wire, wired everything at the relay, don't see how it can be done any differently.



 
Sponsored Links
  #2  
Old 10-26-18, 07:52 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 59,721
Received 1,184 Votes on 1,096 Posts
Welcome to the forums.

You took that control apart and soldered a black wire to the relay/transformer junction ?
If yes..... you need to measure between that and each TT terminal. The T terminal that shows 24vAC is R and the other is W.
 
  #3  
Old 10-26-18, 08:33 PM
B
Member
Thread Starter
Join Date: Oct 2018
Location: Canada
Posts: 3
Received 0 Votes on 0 Posts
I figured that out.
Reading the FAST-STAT troubleshooting guide, it says the transformer must be between 23 - 28v. Mine reads 22v and change, can that really be the problem?
 
  #4  
Old 10-26-18, 09:29 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 59,721
Received 1,184 Votes on 1,096 Posts
I have recommended them to people but as a pro..... I just run a new cable.
So.... I can't advise you if that voltage is a problem.

Actually..... I think your problem may be that the transformer in that control may not be large enough to run the relay and your stat. It may only be a 5va or possibly 10va transformer.
 
  #5  
Old 10-27-18, 07:31 PM
B
Member
Thread Starter
Join Date: Oct 2018
Location: Canada
Posts: 3
Received 0 Votes on 0 Posts
I got an external transformer and everything is working
 
  #6  
Old 10-27-18, 08:54 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 59,721
Received 1,184 Votes on 1,096 Posts
Good job. Thanks for the update.
 
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
 
Ask a Question
Question Title:
Description:
Your question will be posted in: