Schneider Airsystems AM 22-8 Notice D'utilisation D'origine page 34

10 OPERATING PRINCIPLES
The air end is a single-stage asymmetrical screw type, driven by an electric motor. The air is compressed
through the rotation of a male and female rotors which mate perfectly along their parallel axes, and are housed
in a cast-iron case.
Oil is injected into the air-end housing for the double purpose of cooling the unit as well as lubricating the parts
in movement.
The air, once compressed, enters a receiver where the remaining oil is separated to a residual of about 2-3ppm.
At this point it is ready to be delivered.
Should the oil temperature be above the desired running temperature, the separated oil will pass through a
thermostat-controlled oil cooler, should not this be the case, it will be bypassed directly into the air end to start a
new cycle of lubrication and cooling.
The air for the cooler used to cool the motor, it is led into the compressor case through a fan driven directly by
the motor.
11 COMPRESSOR DIAGRAM
P. DENOMINATION
1) ELECTRIC MOTOR
2) AIR-END
3) CONDENSATE DRAIN
4) OIL SEPARATION FILTER
5) SAFETY THERMOSTAT
6)
7) SAFETY VALVE
8) OIL FILTER
9) OIL COOLER
10) THERMOSTAT VALVE
P. DENOMINATION
11) AIR INTAKE FILTER
12) SAFETY GUARD
13) AIR INTAKE VALVE
14) OIL RETURN PIPE / OREFICE
15) PRESSURE INDICATOR
16) DRAIN SOLENOID VALVE
17) COOLING FAN
18) PRESSURE TRANSDUCER
19)
MINIMUM PRESSURE AND NON RETURN VALVE
20) AIR RADIATOR
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