General; Purpose Of Controls - Sullair DE-18 Series Operator's Manual And Parts List

6.1 GENERAL

While Sullair has built into the DE-18 Series com-
pressor package a comprehensive array of controls
and indicators to help assure proper operation, the
user should recognize and interpret readings which
call for service or indicate the onset of a malfunc-
tion. Before starting the unit, the user should
become familiar with the controls and indicators -
their purpose, location, and use.

6.2 PURPOSE OF CONTROLS

CONTROL OR INDICATOR
EMERGENCY STOP SWITCH
DISCHARGE CHECK VALVE
PRESSURE VALVES
INLET VALVE CYLINDER AND CONTROL
VALVE ASSEMBLY
BLOWDOWN SOLENOID AND PNEUMATIC
BLOWDOWN VALVE ASSEMBLY
DRAIN VALVES
OIL PRESSURE BYPASS VALVE
THERMAL VALVE
SUMP SIGHT GLASS
COMPRESSOR OPERATION
The minimum continuous operating pressure is
70 psig (4.8 barg). the compressor should not
be operated below this pressure except for short
periods. The controller will shut the machine
down if it is operated continuously below 70
psig (4.8 barg) for ten minutes.
PURPOSE
Pushing in this switch, found on the control panel and on the
outside of the package, cuts power to the controller and
stops the engine.
Isolates compressor from field pipework when shut down.
Located between the HP silencer/dampener and the after-
cooler.
Found on the discharge pipework of both LP and HP stages,
they vent the compressed air to atmosphere in case of an
over pressure condition - 65 and 165 psig (4.5 and 11.4
barg), respectively.
The hydraulically operated butterfly valve throttles the air-
flow entering the unit inlet flange - LP stage. A 4-way elec-
tric solenoid valve loads and unloads the hydraulic actuator,
in response to controller commands.
The 3-way solenoid valve and pneumatic blowdown valve
vents compressed air (HP discharge) to atmosphere
through a muffler.
Furnished are manual backups and automatic drain valves
used in the condensate separator drain lines.
To maintain desired oil flow and to protect oil pump from
over pressure situations.
This thermal valve automatically opens/closes to bypass
cold oil around the heat exchanger to ensure fast oil warmup
and optimize operating temperature.
Two sight glasses, located at the sump end, indicate the
level of lubricant in the sump. The following guideline for oil
level should be used:
Compressor stopped: Oil level should reach 25-100% of the
upper sight glass.
Section 6
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