2205B0JE-DA-J-N_2014.05.
4 Compressor and Package Operation
Screw Compressor J-series
4.4 Action for Stopping the Compressor for Long Period of Time
4-7
4.4 Action for Stopping the Compressor for Long Period
of Time
Before stopping the compressor for a long time, make sure to perform the following steps.
Turn off the main motor power.
Turn off the oil heater power and the control power.
Close the suction stop valve and discharge stop valve.
If an economizer or liquid injection is used, close the stop valve located at the compressor inlet.
If the stoppage period is 1 month or longer, perform the following checks every month.
Measure the package pressure.
Check for refrigerant leak using a leakage detector.
Operate the oil pump for 5 minutes. After that, turn the compressor driving shaft manually. (10
turns or more)
When restarting the compressor after a stoppage period of 1 year or longer, check the package for
refrigerant leakage and replace the lubricant. Also check the main motor for insulation resistance.
Supply power to the oil heater for at least 1 hour before operation starts. And before starting the
operation, confirm that the refrigerant is not condensed in the package by checking the package
temperature and pressure (especially the suction pipe).
