Katy-West Houston Air had written this in response to
http://www.thestuccocompany.com/hvac...ser-31920-.htm
:

Mixing R-22 and R410A is serious invitation for trouble. Once Mineraloil
mixes with the Polyolester oil you can just about guarantee compressor
failure after compressor failure. Using the old lineset is OK, but they
MUST be flushed with RX-11, and no chinching. We use a minimum of 1 can
per system after an inital high pressure nitrogen purge to insure all of
the old oil is stripped from the lines. We then follow up with a second
high pressure dry nitrogen purge to help remove any RX-11 liquid that may
be present in the lines and provide about a 2 hour vacuum to the system.
-------------------------------------
KJPRO wrote:

"Stormin Mormon"
wrote in message
...
Sounds like you have some really interesting HVAC techs, there.
Mix Puron
and R-22? Not a good idea. If it works at all, it won't work for
long.


Are you visiting the area Stormy???
Sounds like something you'd do...







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