Introduction; Description Of Components; Sullair Compressor Unit, Functional Description; Control System, Functional Description - Sullair V-200TS Operator's Manual And Parts List

2.1 INTRODUCTION

Your new Sullair lubricated rotary screw air com-
pressor with variable speed drive will provide you
with a unique experience in improved reliability and
greatly reduced maintenance.
Compared to other types of compressors, the
Sullair rotary screw is unique in mechanical reliabil-
ity, with "no wear" and "no inspection" required of
the working parts within the compressor unit.
Read the Maintenance Section to see how to keep
your air compressor in top operating condition.
Should any questions arise which cannot be
answered in the following text, call your nearest
Sullair representative or the Sullair Corporation
Service Department.

2.2 DESCRIPTION OF COMPONENTS

Refer to Figures 2-1A, 2-1B,
components and assemblies of the air compressor
are clearly shown. The complete package includes
compressor, electric motor, variable speed
drive, Supervisor™ Controller, compressor inlet
system, compressor discharge system, com-
pressor lubrication and cooling system, capaci-
ty control system, instrument panel, aftercooler,
and combination separator and trap, all mounted
on a heavy gauge steel frame.
On air-cooled models, a fan draws air over the
motor and forces it out through the combined after-
cooler and fluid cooler thereby removing the com-
pression heat from the compressed air and the
cooling fluid.
On water-cooled models, a shell and tube heat
exchanger is mounted on the compressor frame.
Fluid is piped into the heat exchanger where com-
pression heat is removed from the fluid. Another
similar heat exchanger cools the compressed air.
Both air-cooled and water-cooled versions have
easily accessible items such as the fluid filters and
control valves. The inlet air filter is also easily
accessible for servicing.
2.3 SULLAIR COMPRESSOR UNIT, FUNCTIONAL
DESCRIPTION
Sullair tandem air compressors feature the Sullair
compressor unit, a two-stage, positive displace-
ment fluid lubricated-type compressor. This unit
provides continuous (pulse-free) air compression to
meet your needs.
Fluid is injected into the compressor unit where it
mixes directly with the air as the internal rotors turn,
compressing the air. The fluid flow has three basic
functions:
VARIABLE SPEED DRIVE APPLICATIONS
2-1C and 2-1D. The
1. As coolant, it controls the rise of air temperature
normally associated with the heat of compres-
sion.
2. Seals between the rotors and the stator and also
between the rotors themselves.
3. It acts as a lubricating film between the rotors
allowing one rotor to directly drive the other,
which is an idler.
After the air/fluid mixture is discharged from the
compressor unit, the fluid is separated from the air.
At this time, the air flows to the service line and the
fluid is cooled in preparation for injection.
2.4 CONTROL SYSTEM, FUNCTIONAL DESCRIP-
TION
The purpose of the compressor control system is to
regulate the amount of the air being compressed to
match the amount of compressed air being used.
The Capacity Control System consist of variable
speed drive and inlet valve. The functional
description of the control system is described below
in five distinct phases of operation. The following
description text applies to V-200TS series variable
speed drive compressors
Controller. Depending on the model, the com-
pressor can be operated at a setpoint pressure
from 60 to 175 psig (4.1 to 12.1 bar). Refer to the
nameplate for operating pressure range. The
Supervisor Controller will automatically set the
frequency range based on the selected pres-
sure. For explanatory purposes, this description will
apply to a compressor with an operating pressure of
100 psig (6.9 bar). A compressor with any other
pressure range would operate in the same manner
except stated pressures.
START MODE- 0 – 50 PSIG (0 TO 3.5 BAR)
When the Supervisor Controller (START)
ton is depressed, the VSD ramps the motor to full
speed and the sump pressure will quickly rise from
0 to 50 psig ( 0-3.4 bar). During this period, the
solenoid valve is closed, the inlet valve is fully open
and the air-end delivers full capacity to the sump
tank. 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).
FULL LOAD MODE- 50 TO 100 PSIG (3.4 TO 6.9
BAR)
When the compressed air pressure rises over 50
psig (3.4 bar) the minimum pressure valve opens
allowing compressed air to flow into the service line.
From this point on the line pressure is continually
Section 2
with Supervisor
but-
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