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Date:         Sun, 5 Jul 1998 20:54:48 EDT
Reply-To:     GMBulley@AOL.COM
Sender:       Vanagon Mailing List <Vanagon@vanagon.com>
From:         GMBulley@AOL.COM
Subject:      Re: A/C, R-12 to R134 Conversion
Comments: To: macpine@EARTHLINK.NET, Vanagon@VANAGON.COM
Content-type: text/plain; charset=US-ASCII


In a message dated 98-07-05 11:48:38 EDT, macpine@EARTHLINK.NET writes:


<< 6)      Attach manifold gage set and vaccume pump and pump down system for
a 15 min. check. >>


It is a tiny thing, and it is only to satisfy my anal-retentive side ( and
those of you who MUST HAVE THE TRUTH on the list) that I offer this
correction...


The reason that AC folks put a high vacuum on the system is to boil out the
moisture in the system prior to recharge. I don't recall the EXACT numbers,
but when you lower the pressure to, say, 29.5. inches of mercury, the boiling
point of water drops to something like 80 degrees F. Keep it there for 15-30
minute, and all the water gets sucked out. Less chance of componant corrosion.


gmbulley
cary, nc
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