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Originally Posted by FixItRight

The system was clean. I have seen it R22 and Poe. Replaced compressor and was told it had Poe in it but turns out it was min. Run unit and it later goes off on oil pressure. Found core driers and strainer in oil sump gummed up.So like I said before I have seen firsthand that Poe and Min gum up.

What tests were performed to determine the system was clean?

Quick acid test? Refrigerant Analyzer? Temp./Pressure?

I'd suggest that acid was present in the system, or in one of the oils that was added to the system.

How long is the POE oil in an opened container good?

Originally Posted by drwhy

What would you use to flush out the MO?

Don't worry about the MO. New comp with POE, conversation is done.

Nitrogen.
Flush is for burn out's and you best have Full Flow and NO Restrictions Anywhere.
Old thread but still a good 1.
Times Change and so do WE.

Originally Posted by RoBoTeq

As of February 2014, Copeland has been putting POE oil in all of their R22 compressors. That means that all R22 dry units will have POE oil in them. According to dry 22 unit instructions, linesets and coils must be flushed free of existing oil before installing the dry 22 unit. If Copeland finds mineral oil in compressors that fail with the first 20 months of installation (the time period that Copeland warranties compressors) it will turn down the warranty claim.

What would you use to flush out the MO?

As of February 2014, Copeland has been putting POE oil in all of their R22 compressors. That means that all R22 dry units will have POE oil in them. According to dry 22 unit instructions, linesets and coils must be flushed free of existing oil before installing the dry 22 unit. If Copeland finds mineral oil in compressors that fail with the first 20 months of installation (the time period that Copeland warranties compressors) it will turn down the warranty claim.

Originally Posted by koolkahuna

Sorry, I typed that in wrong.
What I meant was that you can't mix R-12, POE, and Tequila.
Apparently I just had a mini-stroke/brain fart...not sure what I was thinking.
POE IS compatible with all refrigerants according to literature I could find.

Actually, I was told by several suppliers, and other techs that R-12 was the only refrigerant not compatible with POE. As I never charge a system with R-12 anymore, I took their word for it.
Don't I look like the tool...
My Apologies!

Tequila is compatible with anything. https://www.youtube.com/watch?featur...&v=xN0254u56Mc

Either that or use a refractometer...

Originally Posted by Damo

Copeland / Emersons response to the POE Mineral question for their R22 compressors?

Go right ahead and mix them.

http://www.emersonclimate.com/en-US/...essor.aspx#Q15

I thought I had seen it somewhere that R-12 can't use POE, point #7 in this document states that plainly.
I had also seen documentation stating that when performing an oil change to POE from mineral oil, three changes needed to be performed to get the min oil to a percentage lower than 5%. Anyone else ever see that?

Thanks for posting that by the way!

I have recently serviced an R-22 unit with poe oil almost made the mixing poe and mineral oil mistake.Close one but caught it.that was the first time I saw it done.

Well this should end the ongoing debate with some of the guys at my company.

Copeland / Emersons response to the POE Mineral question for their R22 compressors?

Go right ahead and mix them.

http://www.emersonclimate.com/en-US/...essor.aspx#Q15

.

Originally Posted by valdelocc

I read an article by one of DuPont engineers regarding the conversion of existing r-22 systems to 438a (mo-99) and he recommends mixing a little POE with the system mineral oil to increase return.

check it out

http://www2.dupont.com/ISCEON/en_US/...ue_Allgood.pdf

Phew! We had oil problems with one DT rack and a MT rack when we switched to MO-99. We found some cases logging oil. We put a few cans of POE in both and the problems seemed to have vanished


No...no gumming up.

This might be apples and oranges but people mix mineral and synthetic (POE) motor oils in cars all the time. Once upon a time car people were having this same discussion...

If my makes any difference in this debate I vote for "mixing oil isn't
a terrible big deal"

but whatever.

Originally Posted by FixItRight

There are more then one kind of both Poe and Min so some might not gum up but I know that mine did.I guess tho if you never seen it than it never happen. I do know I will not mix it. But this is my last post on this because everyone thinks they know more about what I seen then I do.

There is more to it than my not having seen it.

Since your mind is closed to information, we can agree to disagree on this topic.

I've seen plenty of R-22 racks out there that have had compressor changeouts with compressors filled with min oil or Poe oil when the rack had AB oil. And they run great.

I'm willing to bet this guy who saw an instant gum up also threw in some type of super seal that reacted with his contaminated system and solidified at all components containing moisture.

You having an issue with one system doesn't make it the norm. When the companies that make the stuff say it can be mixed together I think that should be an good indication that maybe, just maybe, your experience was not typical.

Originally Posted by jpsmith1cm

...and it didn't instantly turn to concrete and plug all of the filters, driers, screens, strainers, valves, scramble the compressor internals and dissolve the copper piping?

There are more then one kind of both Poe and Min so some might not gum up but I know that mine did.I guess tho if you never seen it than it never happen. I do know I will not mix it. But this is my last post on this because everyone thinks they know more about what I seen then I do.

nope. haha. it was a time consuming process though because a real genius or 2 just added oil when the sentronic tripped instead of figuring out where the oil went. luckily, someone actually installed an oil line drier and ball valves on the return line from the seperater, so i was able to valve it off and drain the oil before it slugged. ended up getting 4 1/2 times the factory oil charge out of the system!

I read an article by one of DuPont engineers regarding the conversion of existing r-22 systems to 438a (mo-99) and he recommends mixing a little POE with the system mineral oil to increase return.

check it out

http://www2.dupont.com/ISCEON/en_US/...ue_Allgood.pdf