[s-cars] [urq] Good news for R12 A/C people

[Steve Mills]

I sourced a Sanden rotary compressor and adapter bracket from eBay, but there are plenty of vendors selling York replacement kits- just do a Google search on York and Sanden and you should get a number of hits. 

On Jul 8, 2013, at 9:22 AM, Steve Marinello <smarinello at entouch.net> wrote:

> Been trying to find that solution myself, John.  My mini York gave up and
> no one will rebuild it, so I figure it's time to go with the compressor
> conversion.  I think they are not that difficult to come by, although I
> don't remember the name right now, but the mounting bracket and other
> fitting mods are another story.  Somewhere on a long dead computer, that
> information exists, but it's probably outdated by now.
> 
> But at least the RS24 seems to be a great path to go to.  Thanks, Dave.
> 
> 
> Steve
> 
> 
> On Sun, Jul 7, 2013 at 11:27 PM, John <johnkarasaki at msn.com> wrote:
> 
>> Hey Dave,
>> 
>> This is great information. Thanks!
>> 
>> On a related note, do you know of a lighter, smaller, more efficient
>> compressor to replace the heavy York urq compressor.
>> 
>> John
>> 
>> djdawson2 at aol.com wrote:
>> 
>> 
>> 
>> 
>> Always been a quandary what to do with R12 cars as the refrigerant becomes
>> less available and more expensive.
>> 
>> I've never been a fan of converting R12 systems to R134... the pressure
>> set points on the R12 system compressors and the phase change points for
>> the R134 refrigerant are not optimally compatible, leading to less than
>> great performance overall.  On top of that you have to go through the
>> exercise and expense of changing out all your o-rings and attempting to
>> purge all of the system's non-compatible oil, sometimes hoses, etc...
>> 
>> In the past, a drop-in replacement has been a product called Autofrost,
>> also known as R406A.  I've used this product over the years, and it
>> performed quite well.  Additionally, it could be used to top off a low
>> charge situation without removing the old R12.
>> 
>> I recently depleted my remaining supply of the R406A, and when I attempted
>> to order another cylinder, I found that it was no longer available.  The
>> supplier advised that I try RS24, also known as R426A.
>> 
>> I had just received my cylinder of RS24 when a fellow lister (Justin
>> Riley) needed some help with the A/C in his freshly renovated '85 urq.  He
>> had just replaced his receiver/dryer and compressor.  We evacuated his
>> system for about an hour, and then charged it with the RS24.  Very quickly
>> we were seeing vent temps in the 33-37 degree range, depending on engine
>> speed (a little more speed = colder).
>> 
>> Bottom line - impressive, and a viable alternative to those with R12 cars.
>> 
>> You can read up on RS24 - but here are some highlights:
>> 
>> - You can NOT top off a low R12 system with the RS24.  It must be
>> completely evacuated and recharged.  Very strongly recommended that you
>> replace the receiver/dryer when doing this
>> - You do not have to worry about oil compatibility
>> 
>> You can go here  http://www.rscool.com/RS-24.html ; to see the product
>> charts, MSDS, etc..  Also available is a pressure chart which shows
>> performance side by side of R12, R134, and RS24... clearly indicating why
>> the RS24 is a far superior solution to converting to R134.
>> 
>> Anyway... thought this might be interesting to folks like me - with a
>> garage full of R12 cars.
>> 
>> Dave
>> 
>> 
>> 
>> 
>> 
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