Section 5 - Operation; General - Sullair ES-6 SERIES User Manual

ES-6 USER MANUAL

5.1 GENERAL

While Sullair has built into this compressor a
comprehensive array of controls and indicators to
assure 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
5.2 PURPOSE OF CONTROLS
CONTROL OR INDICATOR PURPOSE
START SELECTOR SWITCH
LINE PRESSURE GAUGE
FLUID LEVEL SIGHT GLASS
COOLER BYPASS VALVE
MINIMUM PRESSURE/CHECK VALVE
DISCHARGE TEMPERATURE SWITCH
PRESSURE RELIEF VALVE
AIR PRESSURE SWITCH
SOLENOID VALVE
SUMP PRESSURE SWITCH (Not used on cur-
rent models except with Wye-Delta starter).
DISCHARGE TEMPERATURE GAUGE
malfunction. Before
compressor, read this section thoroughly and
familiarize yourself with the controls and indicators
- their purpose, location and use.
CONTROL OR INDICATOR PURPOSE
The three-position switch provides selection between MANUAL/
START, OFF/RESET and AUTOMATIC/START (for further
description, see Section 2).
Continually monitors service line air pressure.
Indicates fluid level. The level is checked by looking at the fluid
level sight glass on the end bell. The fluid level should cover 1/2
to1/4 of the sight glass during operation. With the compressor
shut down, the level should be 3/4 of the sight glass. DO NOT
OVERFILL.
Regulates fluid flow to and around the cooler. Designed to main-
tain a minimum operating temperature of 170°F (77°C). Used for
fast warm-up and start-up.
Maintains a minimum of 60 psig (4.1 bar) in compressor sump.
Valve piston restricts receiver air discharge from receiver/sump
when pressure falls to 60 psig (4.1 bar). Also incorporated in this
valve is a terminal check valve which prevents line pressure
backflow into the sump during unload conditions and after shut-
down.
Shuts the compressor down when the compressor discharge
temperature exceeds 240°F (116°C).
Opens sump pressure to the atmosphere should pressure inside
the sump become too high. Operation of this valve indicates that
the air pressure switch is either faulty or out of adjustment.
Senses service line pressure. When line pressure reaches maxi-
mum setting, the pressure switch opens solenoid valve circuit to
unload the compressor.
Vents sump pressure through inlet control valve to the atmo-
sphere during unload conditions and shutdown.
Senses sump pressure and prevents compressor from starting
until sump pressure has fallen below preset pressure of 10 psig
(0.7 bar).
Continually monitors discharge temperature of the compressor.

Section 5 - OPERATION

starting your Sullair
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