Refrigerant Oils

[NANOTECH]

I work with a guy that says his R22 Racks are running to high a head pressure Set points are 225psig. He says the boss wants these pressures to reduce the amount of refrigerant needed in the system. He says that the mineral oil is waxing and causing alot of problems and if he does an oil change and convert to Alkabenzine he will run lower head pressures and have fewer problems! Any opinions on this and the pros and cons on using one or the other would be greatly appreciated. Any literature addressing this?

[icemeister]

Son...Step right up, cuz I have the answer to all your problems right here in this bottle! Yup, it's Icemeister's secret recipe...Guaranteed to improve your oil circulation, reduce discharge temperatures & head pressure and increase operating efficiency...all while contributing to combat global warming and world hunger!

What did you say? AB oil to reduce head pressure? Never heard of such a silly thing.

[jpsmith1cm]

run the head pressures lower.

change the oil more frequently. Annually.

Run the superheat at 20-30 at the rack.

The oil isn't waxing, it is carbonizing, I'll bet.

[mspanky]

Run lower pressure and switch to AB. We run our R22 racks at 70* condensing without problems.

[jpsmith1cm]

Run lower pressure and switch to AB. We run our R22 racks at 70* condensing without problems.

that's where we run ours.

[bunny]

The head pressure and discharge temperatures are determined by the operating conditions and the thermodynamic properties of the refrigerant....NOT the oil.

Mineral oil decomposes at a lower temperature than both AB and POE, hence they are both better choices on LT R-22 systems.

[hvacjamie]