NEW LUBRICANTS
In switching from refrigerant 502 to refrigerant 404A,
the compressor lubricants had to be changed. Oils
used in the compressors in the past were mineral
based. The new oils used are polyol esters. Special
consideration must be made when handling these oils.
Processing procedures must be more rigorous to avoid
absorbing moisture. Also, P.O.E.’s are better solvents
which means they will dislodge and carry debris
through a system to a far greater extent than do miner-
al oils. The oil used in Copeland compressor is Mobil
Artic EAL-22-CC.
MAINTENANCE & REPAIR 27
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