Date:         Fri, 5 Aug 2016 09:29:44 -0400
Reply-To:     Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject:      Re: AC servicing woes
Comments: To: John Rodgers <jrodgers113@GMAIL.COM>
In-Reply-To:  <CA+az7_6Cpw2x+5GT6OOb=RXN7nDL5p0FXYDPJW3rphYKC1CWwA@mail.gmail.com>
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Flushing the system should include the condenser and evaporator. It all gets loaded with oil. When are vans where built R12 with mineral oil was still the prevalent standard. No need to mention other options. As for the quantity that is the total quantity. When adding to the system you have to consider what is still in the compressor. Too much oil is not good.  As important as it is for compressor lubrication it is also a non-condensable (or non-vaporizing) contaminant which reduces system efficiency  and excess coating reduces heat transfer efficiency. PAG oil is generally used for OEM R134a systems. The Ester oil is used more for conversions as it will mix better with residual R12 oil and avoid the complications there. 

Dennis


-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of John Rodgers
Sent: Friday, August 5, 2016 9:11 AM
To: vanagon@GERRY.VANAGON.COM
Subject: AC servicing woes

The kind of oil usec in the AC systems on my Vans has come into question.
In looking thru the BENTLEY,  Ifind no reference to AC oil at all.  At ADVANCE AUTO PARTS their parts and service computer for the Vanagon shows so many ounces of PAG OIL - or - so many ounces of mineral oil. Can anyone quote me a rererence as to what it is supposed to be and what quantity???

Next question: when flushing the system, is it lines only or does the flush material also get washed through the condenser and evaporator???
I have a new receiver/drier to put on after the flush.

John