A LOOK AT SERVICE SAFETY
Operation
111
Figure 6-2.
Refrigerant and oil mixture fill sight
glass after week-end shutdown.
Figure 6-3.
Five seconds after start-up, violent
foaming action fills sight glass as
refrigerant boils away taking oil charge
with it.
Figure 6-4.
More than 60 seconds after start-up,
oil level is well below normal operating
levels—a condition that is an important
factor in compressor bearing wear.
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