Reciprocating Compressor M Series
4-4
4.2 Initial Operation
When approx. 24 hours have passed after the initial startup, foreign materials such as dust, scale, rust, and sand
in the piping can accumulate in the compressor because they flow with the refrigerant gas. Fine foreign materials
that cannot be removed by the suction filter will mix into the oil, resulting in failure or abnormal wear.
Suction of foreign materials into the compressor will continue until all foreign material has been pulled into the
compressor. The greatest amount is suctioned during the initial startup.
Presence of foreign materials can be checked by inspecting the suction filter and checking the contamination of
oil.
The oil in the crankcase can be the first sign of contamination within the refrigeration system. Therefore, if the
oil stays clear for a long period of time, it can be concluded that the inside of the equipment is also clean. If the
oil seems to be slightly blackened or turbid, the oil is contaminated with foreign materials in the equipment.
Replace the oil as soon as possible so as to prevent foreign materials from penetrating into the sliding section of
the compressor. Take sufficient care of the following two points:
z Inspection/cleaning of the filter and replacement of the oil
x Cleaning of the filter is required as per scheduled inspections.
x Replace the oil filter elements if they are soiled. The soiled elements cannot be reused even if they
are cleaned.
z Watch for any abnormal sound or temperature of the compressor.
z Cleaning the oil and suction filters requires the evacuation of the refrigerant and opening of the
compressor. For the evacuation of the refrigerant and assembly/disassembly of the compressor,
refer to "Chapter 5. Maintenance".
Table 4-1 Reference of the oil replacement and filter inspection
Elapsed time
Replacement of
oil and cleaning
of oil strainer
Inspection/
replacement of
oil filter
Cleaning of
suction filter
Inspection of
magnet
After completion of
refrigerant charging
operation
ż ż ² ²
After completion of
trial operation
ż ż ż ²
100 hours after starting
operation
ż ż ż ż
500 hours after starting
operation
ż ż ż ż
Every 1000 hours ż ż ż ż
Note
If contamination of the refrigerant oil or clogging of the filter is found, perform oil
replacement or inspection/cleaning and replacement regardless of the above
conditions.
4.2.1 Initial Operation Method
1. Before starting operation, rotate the crankshaft (manually) or perform inching (operation of 1²2 sec)
twice to check that the oil pressure gauge operates. Check that both surfaces of the rotation side glass
lower slightly as well.
2. Operate the compressor.
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