2202L5JE-DA-C5-N_2015.05.
4. Compressor and Package Unit Operation
Compound 2-stage Screw Compressor 4.3 When Stopping the Compressor for a Long Time
1612LSC Speed Increaser Type
4-8
4.3 When Stopping the Compressor for a Long Time
When stopping the compressor for a long period of time, make sure to perform the following steps.
Turn off the motor main power.
Turn off the heater power and control panel power.
Close the suction and discharge side shut-off valves.
If the operation stop period is 1 month or longer, perform the following checks.
Operate the oil pump for 10 seconds per week.
After that, rotate the compressor shaft (10 rotations or more).
Measure the package unit pressure once per month.
Check for refrigerant leakage once per month.
When restarting the compressor after an operation stop period of 1 year or longer, check the system for
refrigerant leak and analyze the lubricating oil.
If it is found as a result of the analysis that the control criteria given in this Chapter, Section 4.1.5 Tables
4-1 to 4-3 are not satisfied, the oil must be replaced.
Also check the motor insulation resistance.
Supply power to the oil heater at least 1 day before operation start.
Before starting the operation, confirm that the refrigerant is not condensed in the package unit by
checking the package temperature and pressure.
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