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Thread: McQuay Machine Charge
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10-22-2009, 05:27 PM #1
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McQuay Machine Charge
Co-worker is on a PEH126JB, s/n 5RB0300100, fixing leaks. Anyone got machine refrigerant charge? Converted to R-134a, believe to be 1700#. Any help would be appreciated.
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10-23-2009, 06:33 PM #2
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Why trust charge instead of superheat and subcooling esp if it is a retro?
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10-23-2009, 06:53 PM #3
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i understand how to charge a machine. he's on a quoted job which has to be closed out, and with the temps now, he won't be able to wind her up.
also - the original tags were removed, new tags don't state amount.
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10-23-2009, 08:12 PM #4
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I knew you wouldn't ask a question like that unless you had a good reason lol. I do not have the answer to your question, however my office in fl is across the street from mcquays office I can toilet paper their office if they can't answer your question for ya.
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10-23-2009, 08:21 PM #5
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10-24-2009, 02:53 PM #6
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If the conversion was done by McQuay Service, there would probably be a record of the engineering process, in the Staunton office. Many also included a gear ratio change.
At least, you could get the original R-12 charge, and then guess pretty close from there.God Bless the USA
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10-25-2009, 07:09 PM #7
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The way i got it from my dispatcher was the tech was in touch with the factory, and that conversation didn't 'work out' too good. I was asked if i can find out. (I have a mountain of paper, and you gentlemen). Thought there mite be someone out there with a 'cheat' sheet.
Originally Posted by Randy S.
I don't know what was upgraded on the conversion.
But anyways, thank you all for the responses.
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10-26-2009, 01:22 PM #8
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I did many McQuay conversions and the charge usually was 20% more than the R-12 charge. Put the thing at full load, make sure you have 6-12 degrees of subcooling, check the discharge superheat without the liquid injection on, should have 15% DGSH at full load with good subcooling.
Adjust the TXV pilot valve accordingly to achive."I'm from Texas, what country are you from?"
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