Removal and Replacement: Refrigeration System
General Information
Work on the refrigeration system should only be
done when it is certain that the system needs
repair.
•
This ice machine use R-404A (HP62)
refrigerant and the compressor uses Polyol
Ester oil.
•
Do NOT use mineral oil in this refrigeration
system.
•
R-404A is a “near azeotrope” and therefore
liquid charging is required.
•
When the system is serviced, a special liquid
line dryer is required.
•
Polyol ester oil absorbs water very easily, and
when the system is opened for service, it
must be re-sealed as soon as possible (15
minutes maximum).
•
Special leak detection equipment is required
to locate small refrigerant leaks. Usually a
leak detector capable of detecting a
Halongenated refrigerant or HFC-134a will
work. Check with the leak detector
manufacturer if in doubt.
•
As with any other refrigerant, do not mix
R-404A with pressurized air when leak testing.
•
Evacuate the system to 200 microns before
charging.
•
Weigh the nameplate charge into the receiver.
SLE400R
January 1995
Page 24
