Service manual

8
3-3 System Diagram
3-3-1CSOF-S3PL(H), CSOF-S5PL(H)
[ Fig. 3-3 ] System Diagram
GENERAL
The CSOF-S series are an oil-free scroll air compressor. In an operation, a main motor is run to initiate
the compression at an airend. The external air is filtered through a suction filter before entering into
the airend. The compressed air is stored into an air tank via a check valve (non-return valve).
The temperature of the compressed air discharged from the airend is at least 392℉. The air is primarily
cooled in an air tank, and secondarily via an air cooler before being discharged. The saturated vapor
phase compressed air condenses into a water that can manually be discharged via a drain valve in the
air tank.
There are following four safeguards in CSOF-S3PL(H) and CSOF-S5PL(H) models:
1) Over Current Relay (OCR) for Motor – Detects the over current of the motor to stop the compressor.
2) Mechanical Safety Valve – Mechanically discharges the compressed air in the air tank to the air,
if the air pressure exceeds the set value. The compressor shall manually be stopped.
3) Temperature Sensor (Temperature Transmitter ) – Detects the temperature exceeding the set value
(176℉) at the bottom of the airend to stop the compressor.