TXV Valve

Problems related to residential installations.

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Dxrocaa4
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Posts: 9
Joined: Fri Apr 06, 2012 3:44 pm

TXV Valve

Post by Dxrocaa4 » Tue May 01, 2012 2:32 pm

Hi guys! I'm a HVAC newby----Every now & then I run in to a unit where I can't tell if it has a fixed metering device or a TXV valve---What's the quickest & best way tp determine if the unit is fixed metering or TXV---I was trained to charge either on sub-cool for TXV-----or superheat for Fixed metering device----But this HVAC pro at work said he charges everything TXV & fixed metering via superheat----he said superheat is more efficient-----So what's the truth here?
Dxrocaa4New Contributor - - Fri Apr 06, 2012 - pm

Dxrocaa4
New Contributor
Posts: 9
Joined: Fri Apr 06, 2012 3:44 pm

- TXV Valve

Post by Dxrocaa4 » Tue May 01, 2012 6:13 pm

On a unit with a reversing valve do you hook up gauges the usual way----red/hi----blue /lo----or do you hook up one of the gauges to the third valve coming from the reversing valve?

heatseeker
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Joined: Wed Jul 06, 2011 9:10 am

- TXV Valve

Post by heatseeker » Wed May 02, 2012 8:31 am

Third valve coming from the reversing vlv.?????? Yikes-- Must charge by subcooling with txv. Hello is there anybody there?

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