Section 5
COMPRESSOR SYSTEMS
30
and a spring in the actuator causes the spiral valve
to return to the full load (maximum) position.
AUTOMATIC OPERATION
For applications with varied periods of time when
there are no air requirements, Supervisor’s Auto-
matic mode allows the compressor to shut down
(time delayed) when no compressed air require-
ment is present and restart as compressed air is
needed. AUTOMATIC mode also incorporates the
60 second unloaded STOP mode feature which al-
lows the motor to stop from an unloaded condition
when the ON/OFF pad is pressed or after the timed
stop period. If immediate stop is required when op-
erating in AUTOMATIC mode, press the EMER-
GENCY STOP button on the control panel.
5.8 AIR INLET SYSTEM, FUNCTIONAL DESCRIP-
TION
Refer to Figur e 5 --- 1 0 . The c ompr essor inlet system
consists of oneortwodry---typeairfilters,avac-
uum switch and an air inlet valve.
The vacuum switch, located in the compressor Su-
pervisor control system, indicates the condition of
the air filter. When the message “AIR FILTER MAINT
RQD” is displayed,maintenance is required.
The butterfly ---type air inlet valve directly controls
the amount of air intake to the compressor in re-
sponse to the oper a tion of the S ul l ic on C ontr ol
(Sec tion 5.6).
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