410-A Polyol Ester

[goodguy]

Paradiseair, I was told once by a Copeland representative that even in the deepest vacuum, Poe oil can still retain moisture and the only true way to remove all the moisture was to change filter driers, or have a oil filter in a oil return line (if possible)
Also, alco has a moisture indicator (sight glass)that will change color with respect to ppm of water and liquid line temperature, total ppm is figured out by using the graph supplied with sight glass.

[taz24]

Paradiseair, I was told once by a Copeland representative that even in the deepest vacuum, Poe oil can still retain moisture and the only true way to remove all the moisture was to change filter driers, or have a oil filter in a oil return line (if possible)

Synthetic oil is hygroscopic, If moisture enters the oil it can't be removed.
Once contaminated with moisture the oil is US and will need replaceing. Dryers and even vac pumps will not remove the moisture.
the moisture changes the state of the oil and binds to it at the molecular level.
New oil in an open container will be contaminated within 10 hours of exposure and will be unusable within 24 hours.
Synthetic oil must not be exposed to air under any circumstances.
Only use enough that is required for the job and the excess will need to be correctly disposed of.

taz.