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Thread: POE Oil
12-04-2012, 09:03 AM #1
On a small system using R22 when installing new compressor that comes with POE Oil do you have to drain it out and put Minerial oil back in ?
12-04-2012, 09:10 AM #2
You don't HAVE to.
12-04-2012, 09:16 AM #3
12-04-2012, 05:51 PM #4
Nope. Don't have too. I usually do but I'm silly about such things.
12-04-2012, 07:27 PM #5Professional Member
- Join Date
- Sep 2008
My understanding is POE work just fine with r-22 in m/t&h/t systems, low temp will have oil return issues. Never tested first hand, YMMV.
12-04-2012, 08:46 PM #6
22 does just fine with POE. R22 as a low temp is a different animal and requires a demand cooling module to keep discharge temperatures down. As far as issues with oil return, I have 2 condensers (1 freezer) that are low temp 22 that I take care of. I haven't noticed any problems with it.
JP will be along here soon to tell me I'm wrong. :grin:
12-04-2012, 08:53 PM #7
POE and R-22 is indifferent to MT or LT, it works on both.
LT R-22 requires de-superheating to keep discharge temperatures down. Weather it be Demand Cooling or Liquid injection.
12-05-2012, 06:12 AM #8
This is the correct answer.
Actually, if you took a brand new, R-22 low temp system today, I would prefer to use POE oil in it.
As a synthetic oil, it is PROBABLY more temperature resistant than the mineral oil of the past.
Oil return is as much a function of proper piping design as it is a function of refrigerant and oil
12-05-2012, 07:15 AM #9Regular Guest
- Join Date
- Jan 2005
What type of oil the system was in the original compressor? If mineral I would drain the poe from the new comp and replace with mineral then install. I will not deliberately mix those oils in large quantities.
12-05-2012, 01:06 PM #10
12-05-2012, 08:11 PM #11The greater danger for most of us lies not in setting our aim too high and falling short; but in setting our aim too low, and achieving our mark. – Michelangelo
There are powers inside of you which, if you could discover and use, would make you everything you ever dreamed or imagined you could become. – Orison Swett Marden
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12-05-2012, 11:41 PM #12Professional Member
- Join Date
- Jun 2003
I would leave the POE in and make a note of it on the unit.
Then if it needs service in the future, you'll be ready for any number of alternative refrigerants that require a partial oil change.
12-06-2012, 03:23 PM #13
Andy, I miss the Cold War emails.