Section 5
OPERATION
19
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
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.
5.2 PURPOSE OF CONTROLS
CONTROL OR INDICATOR PURPOSE
START PUSHBUTTON Depress to turn the compressor ON.
STOP PUSHBUTTON Depress to turn the compressor OFF.
HOURMETER Records cumulative hours of compressor operation;
useful for planning and logging service schedules.
LINE PRESSURE GAUGE Continually monitors service line air pressure. It is lo-
cated on dry side of receiver downstream from check
valve.
SUMP PRESSURE GAUGE Continually monitors receiver/sump pressure at vari-
ous load and/or unloaded conditions.
DISCHARGE TEMPERATURE GAUGE Monitors temperature of the air leaving the compres-
sor unit. For both air and water---cooled compressors,
the normal reading should be approximately 180
_
Fto
205
_
F(82
_
Cto96
_
C).
AIR FILTER RESTRICTION GAUGE Indicates when the air filter element change is re-
quired. The gauge shows in the red zone when pres-
sure drop through the filter is excessive.
FL UID FILTER MAINTENANCE GAUGE Indicates when a fluid filter element change is re-
quired. It shows red when the pressure drop through
the filter is excessive.
SEPARATOR MAINTENANCE GAUGE Indicates when separator element change is required.
Showsredwhen thepressure dropthrough the filter is
excessive.
“POWER ON” LIGHT (RED) Indicates when the starter is receiving power.
“RUNNING” LIGHT (GREEN) Indicates when compressor is in operation.
FL UID LEVEL SIGHT GLASS Monitors fluid level in the sump. The fluid must be vis-
ible between the ‘full’ and ‘add’ markings. Check the
level when the compressor is shut down.
DO NOT
FILL ABOVE THE ‘FULL’ LINE.
SEPARATOR RETURN LINE SIGHT GLASSES Used to indicate fluid flow in the return lines. When the
compressor is running at full load, fluid flow should be
visible in the sight glasses. There may be little or no
flow when the compressor is running unloaded, but a
sluggish flow at full load indicates a need to clean the
return line strainers.
FL UID STOP VALVE Cuts off flow of fluid tocompressor unit at compressor
shutdown and allows flow of fluid to unit on start---up.
DISCHARGE CHECK VALVE Cuts off the reverse flow of air/fluid mixture through
compressor discharge system at compressor shut-
down.
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