Section 5
OPERATION
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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
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-- STANDARD ELECTRO/MECHANICAL
CONTROL OR INDICATOR PURPOSE
START PUSHBUTTON Depress to turn the compressor ON.
STOP PUSHBUTTON Depress to turn the compressor OFF and reset the com-
mon fault circuit.
HAND AUTO SWITCH (DUAL CONTROL) To s elect between continuos (HAND) operation and au-
tomatic stop/start (AUTO) operation. Shuts off com-
pressor automatically after the compressor runs un-
loaded for a specified time (ranging from 15---30 min-
utes). Restarts compressor w hen the pressure switch
trips to the reload setting. Dual control is enabled by
placing t he control switch in the “AUTO” position.
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 the red zone when drop
through the filter is excessive. The compressor must
be running full load for an accurate indication.
FLUID FILTER MAINTENANCE GAUGE Indicates when a fluid filter element change is re-
quired. I t shows red when the pressure drop through
the filter is excessive.
SEPARATOR MAINTENANCE GAUGE Indicates when separator element change is required.
Shows red when the pressure drop through the filter is
excessive. The compressor must be running full load
for an accurate indication.
“POWER ON” LIGHT (RED) Indicates when the starter is receiving power.
“RUNNING” LIGHT (GREEN) Indicates when compressor is in operation.
“RUNNING” LIGHT (AMBER) Indicates when compressor is in auto mode.
FLUID LEVEL SIGHT GLASS Monitors fluid level in the sump. The fluid must be vis-
ible in the glass. Check the level when the compressor
is shut down. Maximum fill level is the level of t he fill
port, minimizing the risk of overfilling.
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