Re: [FWDLK] Old A/C

[Jack Johnson <johnaire@xxxxxxxxxxx>]

Well that settles that--They did use R-22 in systems in Automotive.  Thanks
for the info.  The 300 Lb test pressure is just that-a pressure tested and
labeled like any other vessel that is enclosed with pressure in it.  The 5
Lbs is the amount of charge needed to operate the system as you stated.
Also because R22 exerts a higher pressure than R12, either can be used to go
to the trunk or farther as higher pressure does not mean helping the system
to have longer lines as the compressor is the means of "pushing" it to where
it has to go.  I could go into detail of each function of all the components
of the system, but won't at this time due to time and it may just be not
needed.

Jack in Shinglehouse, Pa hoping to get ready for Carlisle and leave by Noon
Wednesday.
----- Original Message -----
From: Dave Duricy <desoto@xxxxxxx>
To: Jack Johnson <johnaire@xxxxxxxxxxx>; <L-FORWARDLOOK@xxxxxxxxxxxxx>
Sent: Monday, July 08, 2002 7:30 PM
Subject: Re: [FWDLK] Old A/C


> Jack,
>
> A few months back I discovered a 1953 Imperial with factory AirTemp. The
> system was quite impressive, and I wish I had the means to save the car
and
> experience that A/C.
>
> The A/C system was well labled. A plate afixed to the evaporator box
> mounted in the trunk stated clearly that the refrigerant was R-22. Working
> charge was 5 pounds. High side test pressure was 300 pounds. Test pressure
> low side was 300 pounds. The R-22 would not be needed to get it around to
the trunk because of more pressure in the system.  R-12 can get it there as
the compressure moves it around the system not a higher pressure

 >
> I thoroughly photographed the car, including the A/C parts. Point your
> browser to: http://w3.one.net/~desoto/53imperial/index.html.
>
> Great to read Ed Katzenberger's discovery of literature describing A/C
> system for the '53 DeSoto, too! Wow, a '53 FireDome Sportsman with AirTemp
> and wire wheels would be the ultimate.
>
> Dave Duricy
> DeSotoland.Com
> It's the SMART DeStination!
>
>
> At 10:15 PM 7/8/02 -0700, Jack Johnson wrote:
> >I have been in the A/C trade for 34 years retiring about 2 years ago.
Back
> >in the early 70's I worked for a man who done automotive A/C and we
repaired
> >quite a few, but no 50's models.  I don't remember ever hearing having
R-22
> >in any vehicles-just R-12.  Head pressure wise, R-12 has a normal
operating
> >head pressure of 125 + while R-22 has about 225 + Lb head pressure. It
would
> >seem to me that the R-12 would have been used in all vehicles due to the
> >excessive pressures, but as we all know anything probably can happen and
may
> >have happened.  And I would nnot doube that it may have been tried at one
> >time or another.  All the ones I worked on were R-12.  Are there any
> >documents stating R-22 in an automotive air conditioner??
> >Jack Johnson  Shinglehouse, Pa
> >
> >
>
>
>

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