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2202G1JE-DA-M-N_2010.01.
4 Operation of the Compressor and the System
Reciprocating Compressor M Series 4.2 Initial Operation
4-4
4.2 Initial Operation
When approx. 24 hours have passed after the first startup of the compressor, 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 can not 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 after 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 of the refrigeration system. Therefore, if the oil
stays clear for a long period of time, it can be judged that inside of the equipment is also clean. If the oil seems to
be slightly blackened or turbid in brown, 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:
 Inspection/cleaning of the filter and replacement of the oil

Cleaning of the filter may not be required when inside of the refrigerant cycle in the refrigerating,
cold storage, and air conditioning systems are clean.

Replace the oil filter elements if they are soiled. The soiled elements cannot be reused even if they
are cleaned.
 Watch for any abnormal sound or temperature of the compressor.
 Cleaning the oil and suction filters requires processing of the refrigerant and opening of the
compressor. For processing 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
○ ○
— —
After completion of trial
operation
○ ○ ○
—
100 hours after starting
operation
○ ○ ○ ○
500 hours after starting
operation
○ ○ ○ ○
Every 1000 hours
○ ○ ○ ○
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 1—2 sec)
twice to check that the oil pressure gauge operates. Check that the both surfaces of the rotation side glass
lower slightly as well.
2.
Operate the compressor.
3.
Perform the initial operation according to "Table 4-1 Reference of the oil replacement and filter
inspection".