HVAC PROTech® Forums

arifkhan · Founding Member Joined: 09 May 2006 Posts: 139 8.15

http://www.fast-files.com/getfile.aspx?file=8099

MechAcc · Posted: Thu Nov 29, 2007 9:22 pm Post subject:

Well I am on dial up and it takes longer than 90 seconds to load that page. Cut out timer???? Dumb idea do they think everybody has dsl?

Anyway according to Sporlan the equalizer line should be downstream of the thermostatic expansion valve bulb.

JimB · Posted: Thu Nov 29, 2007 9:56 pm Post subject:

I looked at the answer for you, took 4 seconds (cable) Rolling Eyes

The answer is, you can install it anywhere the suction pressure will be essentially the same as the location of the bulb. (upstream or down stream) Changes in design of the TXV make leakage through the push rods nearly impossible.

ServiceF1rst · Posted: Thu Nov 29, 2007 10:35 pm Post subject:

Thanks Jim - Gary, I put the file in the Archives for you, no time outs - here's the link, may need your Archive credentials to retrieve it.
http://hvacprotech.org/toc/Refrigerants1/metering%20and%20flow/TheTEVexternalequalizer1.pdf
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Of all the instruments utilized in the HVAC/R trades - I trust analog gauges the least.

hvac3901 · Posted: Thu Nov 29, 2007 11:40 pm Post subject:

I have several Walk-in boxes, that are of the constant temperature type. the compressors run all day every day, all year.

the external equalizer is in the hot gas line. the reason for this is when the hot gas comes through to the coil the increase in hot gas line pressure on to the equalizer line closes the TXV. and aloows for tight temp control of the fixture.

just another avenue.
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"That which is not said in all sincerity is wrongly said, and not to be able to rid oneself of this vice is to only sink deeper toward perdition"
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