On 5/23/2014 7:58 AM, Terry Coombs wrote:
OK , what about R22 in an automotive system designed for R12 ? Partial
replacement , IE top off a system that's shutting off due to low pressure at
the receiver can ? I know there are kits out there to convert R12 car AC
systems to R134A , which also has higher working pressures ...


Legally speaking, not permitted.

Technically, R22 has much higher
pressures. If we were on a desert
island outside US territory, I'd
sure try it, if it was the only
stuff I had. Might satisfy the
pressure switch. There would not
be as much refrigerant in the system,
so it might not cool quite as well.

R12 and R22 both miscible with much
the same lubricating oils, so that's
OK there.

--
..
Christopher A. Young
Learn about Jesus
www.lds.org
..