Rheem Airhandler Transformer issues???

[WoodyHVAC]

I installed a new Rheem system 13PJL-30A01 / RHSL-HM3017JA yesterday and I'm having an issue. Everything went good then I went to hook up t-stat wasn't getting any power from transformer? The T-stat wires are new and so is the T-Stat.
1st check voltage on primary side of trans. good 120v on each. ( 240v trans)
2nd checked secondary and have nothing.
Ohmed out at P-73 and S-2
Seemed ok but changed transformer and same issue?
Took off mounting bracket and tested the same way but I had 10v at the base of transformer.
I have checked all my connections about ten times and nothing seems to be wrong. I just know it is going to something stupid but right now I don't know what else could be wrong.
Anybody seen this before?

[beenthere]

From your description, it does sound like you overlooked the obvious.



Sorry, this is not a DIY site. So we are not allowed to give out advise of this nature.

Since answering your question in the open Residential Forums would be posting instruction for DIYers that may read this post later.

If your in the trade, get your post count up to 15, and apply for Pro Membership.
Use this link Apply for Pro Membership

Once accepted, you have access to the pro tech forums. Where you can ask and get answers to technical questions.

Plus, you also have access to the Pro Educational Forums.

All of it is free.

Thank you, for your cooperation.

[WoodyHVAC]

Thanks beenthere, I will look for the obvious again, and I will sign up for the pro membership now. I am not a DIY, but this unit has made me feel like it.

[beenthere]

You need 15 post to apply for pro membership.

They don't have to be trade related. You can make an introduction post in general. And that counts.


You can make a post or 2 or more in food and they count.
You can make post that tell us what kinds of systems you install and work on.

[WoodyHVAC]

Do these count?

[beenthere]

Yes they do.

[WoodyHVAC]

Just e-mailed paper work, do you know how long it takes to be approved?

[beenthere]

Well. You need 15 post before you send in your app. Or they won't consider it.

So you need to get those post in now. And then you'll have to resend it.

Varies how long. By how busy the committee members are. They all have jobs/businesses they must take care of first.

[WoodyHVAC]

thanks

[WoodyHVAC]

It was obvious. Note to self always check power source. The easiest thing to do cost me 3 hrs and a night of sleep.

[davefr]

It was obvious. Note to self always check power source. The easiest thing to do cost me 3 hrs and a night of sleep.

I thought you said you measured 240V at the primary??

[samtheman]

120v measured on each side do not always make 240v.

[WoodyHVAC]

Yes, 120v on each leg. Ground was issue.