Section 4
OPERATION
25
4.1 GENERAL
While Sullair has built into this compressor a com-
prehensive array of controls and indicators to
assure you that it is operating properly, you will
want to recognize and interpret the reading which
will call for service or indicate the beginning of a
malfunction. Before starting your Sullair compres-
sor, read this section thoroughly and familiarize
yourself with the controls and indicators - their pur-
pose, location and use.
4.2 PURPOSE OF CONTROLS
CONTROL OR INDICATOR PURPOSE
ENGINE SWITCH Press this switch to the “ON” (ignition) position to energize
the electrical system of the compressor. Press the switch to
the “START” position to momentarily engage the starter and
start the compressor. Press the switch to the “OFF” position
to shut the compressor down. This switch is located on the
instrument panel.
COLD WEATHER STARTING AID BUTTON Push this button, prior to compressor start-up, to allow the
engine to warm-up for easy starting.
AIR PRESSURE GAUGE Continually monitors the pressure inside the receiver sump
at various load and unload conditions.
HOURMETER Indicates the accumulated hours of operation. Useful for
planning and logging service schedules.
FLUID LEVEL SIGHT GLASS Monitors the fluid level in the sump. Proper level is visible
halfway up the sight glass. Check the level when the com-
pressor is shut down and on level ground.
COMPRESSOR DISCHARGE TEMPERATURE
SWITCH
Opens the electrical circuit to shut down the compressor
when the discharge temperature reaches a specific value
(see Section 3, Specifications).
THERMAL VALVE Functions as a temperature regulator directing the compres-
sor fluid either to the cooler or to the compressor unit.
MINIMUM PRESSURE DEVICE Maintains the minimum of 85 psig (5.9 bar) in the compres-
sor sump.
PRESSURE RELIEF VALVE Opens sump pressure to the atmosphere should pressure
inside the sump exceed 200 psig (13.8 bar).
AIR INLET VALVE Regulates the amount of air allowed to enter the air inlet
valve. This regulation is determined by a pressure signal
from the pressure regulator.
PRESSURE REGULATOR (S) Allows a pressure signal to reach the engine speed control
cylinder and the air inlet valve to control air delivery accord-
ing to demand.
SHUTDOWN SYSTEM/ANNUNCIATOR MODULE (SSAM) Monitors the compressor safety system for shut-
down conditions. The annunciator module on the instrument
panel will flash a code indicating the reason for compressor
shutdown.
BLOWDOWN VALVE Vents sump pressure to the atmosphere at shutdown.
Continued...
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