Sullair LS-200 Operator's Manual And Parts List page 17

Figure 2-2A Compressor Fluid Cooling/Lubrication and Discharge System- Air-cooled
poses, this description will apply to a compressor
with an operating range of 100 to 110 psig (6.9 to
7.6 bar). A compressor with any other pressure
range would operate in the same manner except
stated pressures.
Always refer to the machine nameplate for
designed operating pressure.
START MODE - 0 TO 50 PSIG (0 TO 3.5 BAR)
When the compressor
depressed, the sump pressure will quickly rise from
0 to 50 psig (0 - 3.4 bar). During this period, both
(START) pad is
DESCRIPTION
the pressure regulator and the solenoid valve are
closed, the inlet valve is fully open and the com-
pressor pumps at full rated capacity. The rising
compressor air pressure is isolated from the service
line in this phase by the minimum pressure valve
set at approximately 50 psig (3.4 bar).
Closed Inlet Start- For wye-delta starting, the
unload solenoid valve allows control pressure to
keep the inlet valve closed until the wye-delta trans-
fer is made (6-10 seconds).
FULL LOAD MODE - 50 TO 100 PSIG (3.4 TO 6.9
BAR)
When the compressed air pressure rises above 50
psig (3.4 bar), the minimum pressure valve opens
Section 2
9