General; Purpose Of Controls - Sullair 125 User Manual

4.1

GENERAL

While Sullair has built into this compressor a
complete set of controls and indicators that allow the
operator to control and monitor the compressor's
operation and performance. Operators should learn
to recognize indications which identify a service
requirement or conditions that could lead to (or show)
a (current) malfunction.
compressor, read this section thoroughly to gain
familiarity with the controls and indicators – their
function and location.
4.2

PURPOSE OF CONTROLS

C I
ONTROL OR NDICATOR
E S
NGINE WITCH
Press this switch to the ON (ignition) position to
energize the electrical system of the compressor.
Press the switch to the START position to
momentarily engage the starter and start the
compressor. Press the switch to the OFF position to
shut the compressor down. This switch is located on
the instrument panel.
C W S
OLD EATHER TARTING
Push this button, prior to compressor start-up, to
allow the engine to pre-heat for easier starting.
H
OURMETER
Indicates the accumulated hours of operation. Useful
for planning and logging service schedules.
A P G
IR RESSURE AUGE
Continuously monitors the pressure inside the
receiver tank at various load and unload conditions.
F S L G
LUID IGHT EVEL
Indicates the fluid level in the receiver tank. Proper
level is marked halfway up the sight glass. Check the
level when the compressor is shutdown and on level
ground.
Section 4
GENERAL
Before starting
P
URPOSE
A B
ID UTTON
LASS
125, 130, 49HP AND 185 USER MANUAL
C
OMPRESSOR
S
WITCH
Opens the electrical circuit to shut down the
compressor when
reaches a specific value (See Specifications on page
35).
T V
HERMAL ALVE
the
Functions as a temperature regulator by directing the
compressor fluid either to the cooler or to the
compressor unit.
M P
INIMUM RESSURE
Maintains the minimum of 80 psig (5.6 bar) in the
compressor sump.
P R
RESSURE ELIEF
Vents sump pressure to the atmosphere if pressure
inside the sump exceeds 200 psig (13.8 bar).
A I V
IR NLET ALVE
Regulates the amount of air allowed to enter the air
compressor inlet. Regulation is determined by a
signal from the pressure regulator(s).
P R
RESSURE EGULATOR
Allows the pressure signal to reach the engine speed
control and the air inlet valve to control air delivery
according to demand.
S S
HUTDOWN YSTEM
(SSAM)
Monitors the
conditions requiring shutdown. The annunciator on
the instrument control will flash the applicable
shutdown code.
B V
LOWDOWN ALVE
Vents sump pressure to the atmosphere at
shutdown.
I W -U
DLE ARM P
Keeps the compressor inlet valve closed for reduced
compressor load at start-up. When the compressor is
warmed-up, the handle is turned from the START to
the RUN position for full operation.
D T
ISCHARGE EMPERATURE
the discharge temperature
D
EVICE
V
ALVE
/A
NNUNCIATOR
compressor safety system
C
ONTROL
M
ODULE
for
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