Got the pressure down to 1200 microns yesterday afternoon in about 3 hours.
Must have been a lot of moisture in there..
Today, I took the manifold and one hose out of the rig and got it down to 600 microns on the first 25 minute run!
That was using old pump oil that has two hours on it from yesterday..(It's warm again outdoors. 72F).
I'm going to let the pump cool off for a while and see if I can get down to 200 microns.
If it can't make it, I'll do another oil change and try again..
I've got to start studying up on how to get my can of R410A into the system..
Need to call some HVAC guys from work.. If they aren't all retired too!
http://cgi.ebay.com/410-R410-R410A-R...-/230518803649
I'm starting to think maybe the POE lube in the system might not be too badly damaged to re-use for my tests..