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Old 09-24-11, 04:00 PM   #18
Xringer
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Quote:
Originally Posted by hotwire View Post
You might be getting permeation through your hoses and a small amount of leakage at the valves when opening or closing them under vacuum. Have you tried heating the compressor and internal piping while pulling a vacuum?

http://www.jbind.com/pdf/Deep-Vacuum-Principles.pdf
Thanks for the doc!! It was Very helpful..

"There are many evacuation level recommendations
including the statement “evacuate the system to below
200 microns.” This should not be considered. Note we
say “system” because it is possible to evacuate piping or
some component other than the compressor to below
this level. Refrigeration oil has a vapor pressure and by
going below 200 microns, you will degas particles of the
refrigeration oil. By changing the makeup of the oil, it will
no longer be a true lubricating oil."


I hope that I didn't vaporize all the POE in my system by going to 250!!
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