[Vwdiesel] a/c evacuation

[lbaird119 at aol.com]

  I believe a regular, reclaming station will connect to both sides then pump it into a container.  You don't have to do both sides but 1) it's faster to pull through two ports and 2) if there's a blockage then you evacuate the whole system rather than just one side, as it sounds like happened to you.  Either that or he charged you and omitted  (intentionally or accidentally) the step where he removes the refrigerant.  The other trick I do is to only evacuate down to about 0psi.  Going lower sounds better but causes the system to draw in outside air where at zero to a slight pressure keeps most air out since you're usually doing a fairly quick swap.
     Sure sounds like your reciver/drier is probably already damp unless it was in a sealed bag or something.  Otherwise an open port into it, will let moisture into the dessicant and it's not going to dry your system much.
    Loren



-----Original Message-----
From: Shalyn Shourds <sshourds at flash.net>
To: vwdiesel <vwdiesel at vwfans.com>
Sent: Sat, Jun 8, 2013 8:50 pm
Subject: [Vwdiesel] a/c evacuation


I swapped out the a/c compressor this evening.  I'd previously had the 
efrigerant evacuated at a nearby VW shop.  Tonight, I found out there's another 
ind of a/c evacuation wherein the mechanic pulls the discharge line off the 
ompressor and, no matter how little working room there is under an A4 Jetta, 
nstantly evacuates to escape the green, oily, 134A blowing out of the line.  
I don't know how the a/c recycling unit works, whether it draws from just one 
ide of the system or both, but I'm thinking there was a blockage in the 
ystem.  Hopefully, it's either an internal failure of the compressor or 
omething in the expansion valve or receiver/drier because those are the parts 
'm replacing.  
Sorry, I'm clearly in the learning stages of a/c repair.  Something I'd hoped to 
ever get good at.....
Thoughts?
-Shalyn
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