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Help TRANE XE-80 furnace

17K views 14 replies 9 participants last post by  beenthere 
#1 ·
I have a TRANE XE-80 furnace.

During general maintenance I accidentally broke the reverse flow switch on my blower assembly. I've ordered and received a replacement switch. For reference, the switch is TRANE part #SWT1696. This switch attaches to the blower assembly which is TRANE part #BLW00551.

The description of this switch is "Switch; Reverse Flow, Open at 140F, Close at 125, 1/2 In"

The part that I have to replace is #11 on this diagram.

http://americanhvacparts.com/Merchant2/graphics/00000001/blw005533.jpg

There are 2 yellow wires that come out of the motor assembly and there are 2 places on the reverse flow switch to connect these wires.

My question is, does it matter what yellow wire goes where on this switch ?

-S
 
#3 · (Edited)
Are you sure ? It looks like the wiring diagram shows that there is a difference between the two terminals.

I've scanned the wiring diagram below. Look at the bottom to see the reverse flow switch. You can clearly see that it is marked 3 and 5 and each goes to a different place. Also the switch it self looks like it has some sort of polarity.

Again, my switch only has a 1 and a 3 on it, there is no marking of a 5.


http://suprfile.com/get.php?id=3mv4x7v
http://suprfile.com/get.php?id=3mv4x7v
 
#6 ·
mdshunk, No slap intended. I just wanted to make sure, it took 3 weeks to get this switch and I don't want to blow it out, especially since it is getting cold and I need to install it to use the heat.

Regarding redline's question. On the package it says this.

"Switch; Reverse Flow, Open 140F, Close 130F, 3/4 In., 120/240V"

So I think the answer is 120 in 240 out ?

-S
 
#9 ·
Guys, I belong to a lot of forums and you never know who knows what they are talking about and who is just blowing hot air. As you can see from the number of my posts here, I'm new to this forum.

I didn't know that there were professionals who frequent this board to give advice. For a layman who doesn't know anything about HVAC, looking at a bunch of wires hooked into something that makes fire in your house is concerning. So I don't think that you can blame a guy for just wanting to be sure.

-S
 
#15 ·
Shuts down the burners if the blower fails or the control boards fails to bring the blower on, and enough is flowing backwards/reversed flowing, to keep the main limit from tripping.
 
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