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5.1 GENERAL
While Sullair has built into this compressor a com-
prehensive array of controls and indicators to as-
sure you that it is operating properly, you will want
to recognize and interpret the reading which will
5.2 PURPOSE OF CONTROLS
CONTROL OR INDICATOR
FLUID LEVEL SIGHT GLASS
SEPARATOR RETURN LINE SIGHT GLASS
FLUID STOP VALVE
DISCHARGE CHECK VALVE
THERMAL VALVE
MINIMUM PRESSURE/CHECK VALVE
PRESSURE RELIEF VALVE
SULLICON CONTROL
PRESSURE REGULATOR --- SULLICON
PRESSURE REGULATOR--- SPIRAL VALVE
SOLENOID VALVE #1
SOLENOID VALVE #2 (spiral valve control)
call for service or indicate the beginning of a mal-
function. Before starting your Sullair compressor,
read this section thoroughly and familiarize your-
self with the controls and indicators --- their pur-
pose, location and use.
PURPOSE
Monitors fluid level in the sump. Proper level should fill
the sight glass. Check the level when the compressor
is shut down. DO NOT OVERFILL.
Used to indicate fluid flow in the return line. When the
compressor is running at full load, fluid flow should be
visible in this sight glass. There may be little or no flow
when the compressor is running unloaded, but a slug-
gish flow at full load indicates a need to clean the return
line strainer.
Cuts off flow of fluid to compressor unit at compressor
shutdown and allows flow of fluid to the unit on start---
up.
Cuts off the reverse flow of air/fluid mixture through
compressor discharge system at compressor shut-
down.
Regulates flow of fluid to and around the cooler. De-
signed to maintain a minimum operating temperature
of 170_F (77_C); used for fast warm---up on start---up.
Maintains minimum of 50 psig (3.4 bar) in the com-
pressor sump. Valve piston restricts receiver air dis-
charge from receiver/sump when pressure falls to 40
psig (2.8 bar). Prevents line pressure backflow into
the sump during unload conditions and after shut-
down.
Opens sump pressure to the atmosphere should
pressure inside the sump become too high (150 psig
[10.3 bar]). Operation of this valve indicates that the
high pressure switch is either faulty or out of adjust-
ment.
Regulates the amount of air allowed to enter the air in-
let valve. This regulation is determined by the amount
of air being used at the service line.
Opens a pressure line between the sump and Sul-
licon Control allowing the Sullicon Control to regulate
air delivery according to the air demand.
Opens a pressure line between the service line and
the spiral valve actuator allowing the spiral valve to
regulate air delivery according to air demand.
Bypasses the pressure regulator valve causing the
Sullicon Control to close the inlet valve when the
compressor reaches maximum operating pressure.
Opens when the compressor starts; closes when the
compressor is shut off. This prevents any air system
loss when the compressor is shut off.
Section 5
OPERATION
23
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