Date: Sun, 4 Apr 2010 11:28:17 -0400
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: Adding Freon
In-Reply-To: <4BB81E81.1090601@charter.net>
Content-Type: text/plain; charset="us-ascii"
R-12 has not been manufactured in this country since 1996. Any available is
either from stockpiles, recycled, or bootleg.
The Vanagon AC adapts fairly well to the R-134A except for a performance
loss at idle. The higher head pressure does tend to cause the fan to go into
high speed more often. The real trick is to fill by volume and use ~10% less
than the R-12 requirement.
While there is little to no control over individual use, in most areas,
shops using R-12 need to have certified technicians and the proper recovery
equipment. Few shops will have the equipment for both R-12 and R134A.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
John Rodgers
Sent: Sunday, April 04, 2010 1:07 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Adding freon
From memory (and that's pretty shakey these days - more senior moments
than I like to admit) - R12 can still be used in the system legally
because of the age of the vehicle. But R12 is really expensive, and
because of that high cost - most opt to go to the R134a. R134a is pretty
cheap and can be bought at Walmart or other stores. And - you can
install it yourself. However - to use R134a, you must install a R134a
hardware conversion kit - available from most FLAPS. Though some say
there is no problem with the R134a in these old systems, it is good to
know that the R134a runs at a much higher head pressure than the old R12
for which the Vanagon systems were designed, and that seems to be the
crux of any issues when using R134a in lieu of R12. That given - the
rules do allow for a conversion to R134a, and after the conversion is
made, you can then install Freeze 12 - a refrigerant that approximates
the performance of R12. It runs at much lower head pressures than R134a,
thereby taking the strain off of old systems. and older compressors.
The conversion to R134a rule doesn't require you to actually install
R134a, so you can just install the hardware conversion kit, then install
the Freeze 12. But to run Freeze 12 you absolutely must comply with the
R134a hardware conversion to be legal.
From memory.
Hmmm. Where did I put my glasses..............
John Rodgers
Clayartist and Moldmaker
88'GL VW Bus Driver
Chelsea, AL
Http://www.moldhaus.com
titantic01@AOL.COM wrote:
>
>
> Hello gang,
>
> Last year about the fist of April, I spent over $400.00 to get the A/C in
my '87 vanagon going. a hose was replaced and some minor things were done.
>
> Now, a year later, I turned on the a/C and it was so low of freon that the
safety switch would not even let the compressor run. I went and bought 2
cans of 134 a and a cheap gauge dispensing set up to put it in with.
>
> My question is since the compressor won't energized will I need to some
how jump the compressor clutch to make it run while filling the thing up or
will it start on it's own once I have put in enough freon?
>
> The other thing I want to know is is 2 cans enough or does that system
take a 3rd can?
>
> Thanks for your words of wisdom on this.
>
> Happy Easter everyone.
>
> Chris
>
>
>
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