RE: [DML] AC system compressor doesn't cycle, high discharge pressure
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RE: [DML] AC system compressor doesn't cycle, high discharge pressure



The key point here is that you want enough freon in the system to maintain
35 degrees in the evaporator, too little and you can freeze up, too much and
you get no cooling.

I don't have a R134 temperature/pressure chart, so I can't say what
pressures you should be seeing.

Dave Sontos 

-----Original Message-----
From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf Of
cruznmd
Sent: Thursday, August 11, 2005 8:27 PM
To: dmcnews@xxxxxxxxxxxxxxx
Subject: Re: [DML] AC system compressor doesn't cycle, high discharge
pressure

Page N:09:01 says pressures are dependent upon ambient air temperature.

90 F (32c) the book says low side pressure is 25-32 psi. That doesn't jive
with what you said. Am I reading this wrong?

Also, what quantity (in weight) of freon should I load if I've converted to
R-134a? Will the pressures be comparable?





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