Re: [xj-s] refrigerant question

[BRIAN SCHULTETUS <bjs@eosinc.com>]

John Bertsche wrote:
> 
> I filled my A/C with this stuff called "Autofrost", made by Monroe Air Tech
> Inc. in Bloomington, Indiana.
> It says that it's a replacement for R-12 and R-500, and warns that it
> should not be used in a system that has had R-134A "unless you can remove
> all the oil and replace with regular mineral oil of alkyl benzene". It also
> says that it should be charged to 80% (by weight) of the normal charge of
> R-12. I suspect that this is a similar substance to "hot-shot" which has
> been discussed on the list several times before, but I'm wondering if
> anyone knows what it actually is, i.e. does it have a number like
> R-something. It says that it contains Chlorodiflouromethane and
> Chlorodiflouroethane.
> 
> The guy that did this for me thinks that my compressor might be weak,
> because when the gauge for the high side is very jumpy at times, (rapidly
> fluttering across a 20 or 30 pound range) and the sight glass still shows
> froth even though we increased the pressure today from about 175 to about
> 225. I thought that would make it blow colder, but it doesn't feel like it
> made a difference. It's working, don't get me wrong, but it's not the kind
> of cold I'd like it to be; my girlfriend's Toyota Camry is so cold it
> actually hurts to hold your hand next to the vent for a minute or two. What
> temperature should the air be coming out of the vents?Do I need to dangle a
> thermometer down into the vent to get an accurate reading?
> 
>                                                         jb
 There are no known auto manufacturers ,compressor rebuilders or by in
large most AC shop that would use any of these blended substitutes.Let
alone warranty any of there ac parts.All blends require a special set of
EPA approved fittings and would require separate recovery units as
well.This problem has also created the need for identifiers so whatever
has been installed in someones car can be identified before it
contaminates a recovery tank with a industry accepted product.The EPAs
approval of these alternitive products in no way conferms there ability
to cool or not damage the ac system there interest being in the
ozone.                             Jim Schultetus

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References:

• [xj-s] refrigerant question
• From: John Bertsche <103136.3056@CompuServe.COM>

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