MAINTENANCE WITH Q & A
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8. Compressor Oil Level
There is an oil level indicator on scrolls and semi-hermetic compressors. The
compressors are factory charged and the level should be checked
periodically. Polyol Ester Oil (P.O.E.) is used in the R-404A, R-410A and R-
508B/R-23 compressors. The brand name is Mobil EAL22. This oil was
developed for the use with the new refrigerants.
9. Humidity Demineralizer Filter (Optional Equipment)
The demineralizer filter should be replaced when the color change reaches
3" from the bottom of the filter. Damage will occur if the filter is not
replaced when the color changes from dark blue to orange brown.
MONTHLY
10. Air-Cooled Condenser (If Applicable)
Should be cleaned monthly with a vacuum. This period may be extended if
operating conditions warrant. A dirty, clogged condenser can lead to
excessive head pressure in the R-404A/R-410A system and can result in a
loss of system efficiency and premature failure.
11. Electrical Panel
Check for components and wires which may vibrate loose during operation.
Check for signs of contactor or relay arcing. Check to see that power and
ground connections remain secure.
12. Operating Current
Check the operating current of the compressors, heaters, circulator, and
other components with an Ammeter. Maximum operating values are
shown on the electrical schematic.
13. Check GFCI Receptacle(s) (If Applicable)
Check per instructions on the receptacle. Location of the receptacle(s) is
indicated on the electrical schematic.
14. Tubing Abrasion
Check for evidence of friction wear on all refrigeration lines. Particular care
should be taken in inspecting capillary tubes to pressure
gauges/transducers. Check lines any time the system is shut down.
15. Oil Pressure (Semi-Hermetic Compressors Only)
The oil pressure should run from 15 to 50 PSIG above the suction pressure
of the compressor. A reading below 15 PSIG should be investigated
immediately.
Mineral Oil (3GS) does not
mix with the P.O.E. oils.
Therefore, any oil that is
added to the compressors
must be P.O.E. This oil
attracts moisture much
worse than mineral oil.
Care should be taken to
keep the oil enclosed at all
times.
Voltages dangerous to life
are present in this
equipment. Electrical
service must be performed
by qualified electricians
only. Failure to follow
these instructions may
result in personal injury
and/or loss of life.
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