Purpose Of Controls- Electro-Mechanical - Sullair LS20 Operator's Manual And Parts List

8.1 GENERAL INTRODUCTION- ELECTRO-
MECHANICAL
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

8.2 PURPOSE OF CONTROLS- ELECTRO-MECHANICAL

CONTROL OR INDICATOR
EMERGENCY STOP SWITCH
START "I" PAD
STOP "O" PAD
AUTO " " PAD
HOURMETER
LINE PRESSURE GAUGE
SUMP PRESSURE GAUGE
DISCHARGE TEMPERATURE GAUGE
AIR FILTER RESTRICTION GAUGE
FLUID FILTER MAINTENANCE GAUGE
SEPARATOR MAINTENANCE GAUGE
POWER ON ( ) LED
OPERATION- ELECTRO-MECHANICAL
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.
PURPOSE
Pushing in this switch, found adjacent to the controller, cuts all
AC outputs from the latter and de-energizes the starter.
Depress to turn the compressor ON.
Depress to turn the compressor OFF and reset the common
fault circuit.
To select between continuos (HAND) operation and automatic
stop/start (AUTO) operation. Shuts off compressor automati-
cally after the compressor runs unloaded for a specified time
(ranging from 3-60 minutes [T1]). Restarts compressor when
the pressure switch closes to the load setting. Dual control is
enabled by pressing the "AUTO" pad.
Records cumulative hours of compressor operation; useful for
planning and logging service schedules.
Continually monitors service line air pressure. It is located on
dry side of receiver downstream from check valve.
Continually monitors receiver/sump pressure at various load
and/or unloaded conditions.
Monitors temperature of the air leaving the compressor unit.
For both air and water-cooled compressors, the normal read-
ing should be approximately 180ºF to 205ºF (82ºC to 96ºC ).
Indicates when the air filter element change is required. The
gauge shows the red zone when drop through the filter is
excessive. The compressor must be running full load for an
accurate indication.
Indicates when a fluid filter element change is required. It
shows red when the pressure drop through the filter is exces-
sive.
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 indi-
cation.
Indicates when the starter is receiving power.
Section 8
41