Date: Sun, 4 Sep 2011 13:01:23 -0700
Reply-To: Karl Wolz <wolzphoto@Q.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Karl Wolz <wolzphoto@Q.COM>
Subject: Re: Another AC question
In-Reply-To: <D493BBD8-D42E-49C2-AAA0-6D7BEA2B9A31@mac.com>
Content-Type: text/plain; charset="us-ascii"
The hoses are new, as is the expansion valve, compressor, and receiver
dryer. The only original parts are the condenser and the evaporator. When
the evaporator was out, I cleaned it pretty thoroughly with denatured
alcohol (2 quarts), and it seemed to be running pretty clear when I
finished. I'm trying to not drop the evaporator from the cabinet, if I
don't have to, since we're leaving town on Wednesday.
Main question at this point is, could the receiver/dryer (of which I have
another) have been damaged by running the refrigerant backwards through the
system?
I have heard on a regular basis that vans do not do well in our temperatures
on R134a, and would like to stay with R12. My second choice would be to go
with RedTech or whatever other substitute product I can get my hands on on
short notice.
Karl Wolz
|-----Original Message-----
|From: Kim Brennan [mailto:kimbrennan@mac.com]
|Sent: Sunday, September 04, 2011 11:13 AM
|To: Karl Wolz
|Cc: vanagon@GERRY.VANAGON.COM
|Subject: Re: Another AC question
|
|receiver/dryer is cheap, replace it. Water should not be in
|the system (that's what the dryer is for, to keep it out). To
|flush system, an alcohol is used.
|
|In the GoldBrick (my 86 syncro), when I converted to R134,
|they actually had to replace the evaporator, cause it was all
|gunked up. If your low side is too low, you have a clog
|someplace on the "high" side. Your mechanic has eliminated the
|condenser, but you still have the hoses that go from the
|condenser to the compressor, the host from the evaporator to
|the condenser, and the evaporator (not to mention the receiver/dryer.)
|
|
|On Sep 4, 2011, at 11:46 AM, Karl Wolz wrote:
|
|> '85 Westy with 2.1L, using R-12
|>
|> Only blowing around 80 degrees (better than 112, but not by much),
|> mechanic says 300lbs high side pressure and only about 10 lbs low
|> side. Says he suspects a blockage "somewhere". He drained the R12
|> and blew through the condenser - says that's clear.
|>
|> Due to my ingnorance of things AC, the hoses were initially
|hooked up
|> backwards at the compressor. Mech says running the system
|in reverse
|> may have damaged the receiver/dryer, causing these symptoms. Last
|> night I pulled out the expansion valve and am able to blow
|through it.
|> AC parts guy says that means little, as it could be locked open or
|> closed (this means little or nothing to me [I feel like
|Rocket with this series of questions]).
|>
|> I bought brass fittings last night with which to hook up a
|garden hose
|> to the system (sans compressor & receiver/dryer) to
|hopefully flow out
|> any crud hiding in the system, with the logic that any water inside
|> will be boiled off when a vacuum is pulled prior to recharging.
|> Anyone care to comment on the wisdom of this procedure?
|>
|> Hoping for cooler air,
|>
|> Karl Wolz
|
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