Section 5
OPERATION
17
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 malfunc-
tion. Before starting your Sullair compressor, read
this section thoroughly and familiarize yourself with
the controls and indicators --- their purpose, location
and use.
5.2 PURPOSE OF CONTROLS
CONTROL OR INDICATOR PURPOSE
START PUSHBUT TON Depress to turn the compressor ON.
STOP PUSHBUTTON Depress to turn the compressor OFF.
HOURMETER Records cumulative hours of compressor operation; use-
ful for planning and logging service schedules.
LINE PRESSURE GAUGE Continually monitors service line air pressure. Located on
dry side of receiver downstream from check valve.
SUMP PRESSURE GAUGE Continually monitors receiver/sump pressure at various
load and/or unloaded conditions.
DISCHARGE TEMPERATURE GAUGE Monitors temperature of the air leaving the compressor
unit. For both air and water---cooled compressors, the
normal reading should be approximately 180_F to 205_F
(82_Cto96_C ) depending on water and ambient temper-
atures.
FLUID FILTER MAINTENANCE GAUGE Indicates when a fluid filter element change is required.
The pointer will move into the red zone w hen the pressure
drop through the filter is excessive.
SEPARATOR MAINTENANCE GAUGE Indicates when separator element change is required.
The pointer will move into the red zone when pressure
drop through t he separator is excessive.
INLET AIR FILTER GAUGE Indicates when the air filter element change is required.
The pointer will move into the red zone w hen the pressure
drop through the filter is excessive.
“POWER ON” LIGHT (RED) Indicates w hen the control panel is receiving power.
“RUNNING” LIGHT (GREEN) Indicates when compressor is in operation.
FLUID LEVEL SIGHT GLASS Monitors fluid level in the s ump. Proper level should fill the
sight glass. Check the level when the compressor is shut
down. DO NOT OVERFILL.
SEPARA TOR RETURN LINE SIGHT GLASS Used to indicate fluid flow in the return line. When the
compressor is running at full load, fluid flow should be vis-
ible in this sight glass. 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 t he return linestrainer.
FLUID STOP VALVE Cuts off flow of fluid to compressor unit at compressor
shutdown and allows flow of fluid to the unit on start---up.
DISCHARGE CHECK VALVE Cuts off the reverse flow of air/fluid mixture through com-
pressor discharge system at compressor shutdown.
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