Author Topic: Providing 24VAC power to Z-Wave Thermostat  (Read 39649 times)

Offline oTi@

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Re: Providing 24VAC power to Z-Wave Thermostat
« Reply #30 on: April 30, 2011, 09:08:40 am »
I'm gonna dig into this again today, and I'll check the blue voltage with a load/stat on it. 
OK. Do you have a model# / pointer to a manual for the combo unit?
 
Quote
The central unit is a combo gas/AC and is outside, so I'd rather not put another power supply there.
I see.
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Offline Intrepid

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Re: Providing 24VAC power to Z-Wave Thermostat
« Reply #31 on: April 30, 2011, 09:15:30 am »
I'm pretty sure this is the unit:

http://www.armstrongair.com/better/13-seer-gaselectric-compact.html

unfortunately, the document links are bad.



Offline Intrepid

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Re: Providing 24VAC power to Z-Wave Thermostat
« Reply #32 on: April 30, 2011, 04:37:01 pm »
Got it.  I took the tstat to the central unit and attached to the blue and red (which read 28V) and it worked.  So I knew the control wire was the problem.  I got in the crawl space and the control wire had been spliced, but the blue (and brown...both unused) were not spliced.  Hooked 'em up and it is now working.

I guess the 19V I was reading was leakage, very micro amps from the red hot.

Now to figure out how to program the thing.


Offline oTi@

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Re: Providing 24VAC power to Z-Wave Thermostat
« Reply #33 on: April 30, 2011, 08:28:41 pm »
Got it.  I took the tstat to the central unit and attached to the blue and red (which read 28V) and it worked.  [...]
Excellent; glad you got it! The 19VAC (unloaded) did seem low.
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Offline mitch672

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Re: Providing 24VAC power to Z-Wave Thermostat
« Reply #34 on: May 01, 2011, 11:03:01 am »
Since this thread has been resurected, I thought I would chime in...

I needed a few more Rainbird UT-1 24VAC power bricks to complete my Trane thermostat installs, there was a lot on eBay with multiples, so I bought it.  Used what I needed, and have 5 or so left, if anyone needs one.  Cost was low (since if only had 1 shipping charge for the lot), so I think I can get these shipped out via USPS flat rate boxes for $11 each if anyone needs one.  PM me, thanks Mitch