Purpose Of Controls- Introduction; Purpose Of Controls- Guide - Sullair LS-200S Operator's Manual And Parts List

5.1 INTRODUCTION
While Sullair has built into the LS-200S Series
package a comprehensive array of controls and
indicators to assure its proper operation, the user
should recognize and interpret readings which call
for service or indicate the onset of a malfunction.
Before starting the unit, the user should become
familiar with the controls and indicators-their pur-
pose, location, and use.

5.3 PURPOSE OF CONTROLS- GUIDE

CONTROL
EMERGENCY STOP SWITCH
THERMAL O/L RESET
MODULATING INLET VALVE
SPIRAL VALVE ("
MODELS ONLY)
PRESSURE REGULATOR
PRESSURE REGULATOR (WITH
OPTIONAL SPIRAL VALVE)
SOLENOID VALVE
MINIMUM PRESSURE/ CHECK
VALVE
PRESSURE RELIEF VALVE
BLOWDOWN VALVE ASSEMBLY
Pushing in this switch, found adjacent to the Supervisor, cuts all
AC outputs from the latter and de-energizes the starter. A fault
message (E STOP) is displayed by the Supervisor until the but-
ton is pulled out and the
Momentarily pushing this button, found on the starter's thermal
overload element housing, re-closes the latter's contacts after a
current overload takes place. Please be aware that the elements
must be allowed to cool sufficiently before resetting.
Regulates the amount of air allowed to enter the air compressor.
This regulation is determined by the amount of air being
used at the service line. Also acts as a check valve to prevent
reverse compressor rotation at shut down.
Internally bypasses and controls the air flow capacity of the com-
" and VCC-
pressor, in order to match air supply to the demand. This device
is optional.
Allows a pressure signal to reach the air inlet valve to control
air delivery according to demand.
Opens a pressure signal to the spiral valve actuator allowing the
spiral valve to regulate air delivery according to air demand.
Bypasses the pressure regulator valve causing the inlet valve
to close when the compressor reaches maximum operating
pressure. Also activates blow-down valve.
Maintains minimum of 50 psig (3.5 bar) in the compressor
sump. Valve piston restricts receiver air discharge from receiver/
sump when pressure falls to 40 psig (2.8 bar). Also prevents
backflow into the sump during unload conditions and after shut-
down.
Vents the sump vessel to atmosphere if the compressed air
pressure exceeds 200 psig (13.8 bar). Its operation indicates
fault with the Supervisor operation or its programming.
Vents the sump vessel to atmosphere during unloading and
shutdown.

5.2 PURPOSE OF CONTROLS- INTRODUCTION

Indicators and functions included in the package
are listed in the following guide. However, all
Supervisor Controller-related functions and indica-
tors are presented in the Supervisor Controller
Manual, so please refer to that document for addi-
tional information.
PURPOSE
pad is depressed.
Section 5
OPERATION
Continued...
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