About Screw air compressor startup and adjustment procedure
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6 FAQs about [Screw air compressor startup and adjustment procedure]
How do I start a compressor if it shuts down?
Insure that the following solenoids turn OFF when the compressor shuts down: oil solenoid valve, economizer solenoid valve, de-superheating solenoid valve. This startup procedure should be followed for each compressor as it is started for the first time. The results of the startup and the startup data should be recorded in the Startup Worksheet.
How to start loncem compressor?
Before starting the compressors the control circuit power should be switched on. At that point, the LonCEM module should have control power to it and the power light (green light in upper right hand corner) should be on. No other lights should be on as the compressor call from the controller should be de-energized.
How do I know if my air compressor is working properly?
The compressor should be “bump started” (i.e. control power de-energized immediately after startup) and the direction of the gauge movement should be checked to insure that the discharge pressure rises upon compressor start. If the compressor rotation is backwards the discharge pressure will be pulled immediately into a vacuum.
How do I check if a compressor is safe?
The compressor motor protection and de-superheating valves (if required) should be checked to make sure that the correct items are installed for each compressor. The results of the tests should be recorded on the startup worksheet. Each compressor must be protected by an approved motor protection device.
Should oil be added before starting a compressor?
No oil should be added to the compressor prior to starting it. Insure that any other feed lines that may be manually closed (including the suction, discharge and economizer service valves) are also opened before starting the compressor.
When should a compressor test be done?
It can be conducted at the factory if final testing is completed on the system before shipment or can be conducted on-site when the refrigeration system and compressors are initially started up. Verification checks to be made after all of the compressors on the rack have been started and are operating.


