Sullair VS-32 User manual

SULLAIR ROTARY
VACUUM SYSTEM
VS-32
150-200hp / 113-150kw
OPERATOR’S
MANUAL AND
PARTS LIST
KEEP FOR
FUTURE
REFERENCE
Part Number
02250157-389
©Sullair Corporation

AIR CARE
SEMINAR TRAINING
Sullair Air Care Seminars are courses that provide hands-on instruction in the proper operation, main-
tenance and service of Rotary Screw Vacuum Systems. Seminars are presented at regular intervals
throughout the year at a dedicated training facility at Sullair’s corporate headquarters in Michigan City,
Indiana.
Instruction includes discussion of the function and installation of Sullair service parts, troubleshooting of
the most common problems, and actual equipment operation. The seminars are recommended for
maintenance and service personnel.
For detailed course outlines, schedule and cost information contact:
Sullair Corporate Training Department
1-888-SULLAIR or
219-879-5451 (ext. 5363)
www.sullair.com
- Or Write -
Sullair Corporation
3700 E. Michigan Blvd.
Michigan City, IN 46360
Attn: Service Training Department

TABLE OF CONTENTS
Section 1 PAGE
SAFETY 1 1.1 GENERAL
1 1.2 TOWING
1 1.3 PRESSURE RELEASE
1 1.4 FIRE AND EXPLOSION
2 1.5 MOVING PARTS
2 1.6 HOT SURFACES, SHARP EDGES AND SHARP CORNERS
2 1.7 TOXIC AND IRRITATING SUBSTANCES
2 1.8 ELECTRICAL SHOCK
3 1.9 LIFTING
3 1.10 ENTRAPMENT
Section 2
DESCRIPTION 5 2.1 INTRODUCTION
5 2.2 DESCRIPTION OF COMPONENTS
5 2.3 SULLAIR VACUUM SYSTEM, FUNCTIONAL
DESCRIPTION
6 2.4 COOLING AND LUBRICATION SYSTEM, FUNCTIONAL
DESCRIPTION
8 2.5 DISCHARGE SYSTEM, FUNCTIONAL DESCRIPTION
9 2.6 CONTROL SYSTEM, FUNCTIONAL DESCRIPTION
10 2.7 INLET SYSTEM, FUNCTIONAL DESCRIPTION
10 2.8 INSTRUMENTATION, FUNCTIONAL DESCRIPTION
Section 3
SPECIFICATIONS 13 3.1 SPECIFICATIONS
14 3.2 LUBRICATION GUIDE - STANDARD VACUUMS
14 3.3 APPLICATION GUIDE
14 3.4 VACUUM INLET MAXIMUM TEMPERATURE FOR
NO CONDENSATION
16 Figure 3-3 Identification - 150HP / 113KW Air-cooled Model
Continued on next page
OPERATOR IS REQUIRED TO READ
ENTIRE INSTRUCTION MANUAL

TABLE OF CONTENTS
Section 3
SPECIFICATIONS
(continued) 17 Figure 3-4 Identification - 150HP / 113KW Water-cooled Model
18 Figure 3-5 Identification - 200HP / 150KW Air-cooled Model
19 Figure 3-6 Identification - 200HP / 150KW Water-cooled Model
20 Figure 3-7 Piping and Instrumentation - 150HP / 113KW
Air-cooled
22 Figure 3-8 Piping and Instrumentation - 150HP / 113KW
Water-cooled
24 Figure 3-9 Piping and Instrumentation - 200HP / 150KW
Air-cooled
26 Figure 3-10 Piping and Instrumentation - 200HP / 150KW
Water-cooled
Section 4
OPERATION 29 4.1 MOUNTING OF VACUUM SYSTEM
29 4.2 VENTILATION AND COOLING
29 4.3 VACUUM SYSTEM PIPING
29 4.4 COUPLING ALIGNMENT CHECK
29 4.5 FLUID LEVEL CHECK
29 4.6 MOTOR ROTATION DIRECTION CHECK
29 4.7 ELECTRICAL PREPARATION
30 4.8 RUPTURE DISK
Section 5
OPERATION 31 5.1 GENERAL
31 5.2 PURPOSE OF CONTROLS
32 5.3 INITIAL START-UP PROCEDURE
32 5.4 SUBSEQUENT START-UP PROCEDURE
32 5.5 SHUTDOWN PROCEDURE
32 5.6 AUTOMATIC RE-START OPTION
Section 6
MAINTENANCE 33 6.1 GENERAL
33 6.2 DAILY OPERATION
33 6.3 MAINTENANCE AFTER INITIAL 50 HOURS
OF OPERATION
33 6.4 MAINTENANCE EVERY 4000 HOURS
33 6.5 FLUID FILTER MAINTENANCE
Continued on next page

TABLE OF CONTENTS
Section 6
MAINTENANCE
(continued) 33 6.6 PARTS REPLACEMENT AND ADJUSTMENT
PROCEDURES
33 FLUID FILTER ELEMENT REPLACEMENT
34 INLET AIR FILTER MAINTENANCE
34 SEPARATOR REPLACEMENT
35 CONTROL SYSTEM ADJUSTMENT
36 6.7 TROUBLESHOOTING INTRODUCTION
36 6.8 TROUBLESHOOTING GUIDE
Section 7
ILLUSTRATIONS
AND PARTS LIST 39 7.1 PROCEDURE FOR ORDERING PARTS
40 7.2 RECOMMENDED SPARE PARTS LIST
42 7.3 COMPRESSOR, FRAME AND DRIVE -
150-200HP / 113-150KW
44 7.4 COMPRESSOR, FRAME AND DRIVE -
200HP / 150KW
48 7.5 AIR INLET AND CONTROL ASSEMBLY - 150HP / 113KW
54 7.6 AIR INLET AND CONTROL ASSEMBLY - 200HP / 150KW
60 7.7 DISCHARGE SYSTEM
64 7.8 SULLICON CONTROL SYSTEM
66 7.9 FLUID PIPING - AIR-COOLED
68 7.10 FLUID PIPING - WATER-COOLED
70 7.11 FLUID COOLING SYSTEM - AIR-COOLED
72 7.12 FLUID COOLING SYSTEM - WATER-COOLED
74 7.13 WATER PIPING ASSEMBLY - WATER-COOLED
76 7.14 ELECTRO-PNEUMATIC CONTROL SYSTEM -
STANDARD CONTROL
78 7.15 ELECTRO-PNEUMATIC CONTROL SYSTEM -
DUAL CONTROL
82 7.16 ELECTRO-PNEUMATIC CONTROL SYSTEM -
DUAL CONTROL WITH ANNUNCIATION
86 7.17 INSTRUMENT PANEL ASSEMBLY -
STANDARD CONTROL
90 7.19 INSTRUMENT PANEL ASSEMBLY - STANDARD
CONTROL WITH ANNUNCIATION (WATER-COOLED)
92 7.20 INSTRUMENT PANEL ASSEMBLY - DUAL CONTROL
Continued on next page

Section 7
ILLUSTRATIONS
AND PARTS LIST
(CONTINUED) 96 7.21 INSTRUMENT PANEL ASSEMBLY - DUAL CONTROL
WITH ANNUNCIATION (AIR-COOLED)
100 7.22 INSTRUMENT PANEL ASSEMBLY - DUAL CONTROL
WITH ANNUNCIATION (WATER-COOLED)
104 7.23 ENCLOSURE - AIR-COOLED
108 7.24 ENCLOSURE - WATER-COOLED
112 7.25 DECAL GROUP
118 7.26 DECAL LOCATIONS - AIR-COOLED
120 7.27 DECAL LOCATIONS - WATER-COOLED
122 7.28 WIRING DIAGRAM - STANDARD CONTROL
123 7.29 WIRING DIAGRAM - DUAL CONTROL
TABLE OF CONTENTS

Section 1
SAFETY
1
1.1 GENERAL
Sullair Corporation and its subsidiaries design and
manufacture all of their products so they can be
operated safely. However, the responsibility for
safe operation rests with those who use and main-
tain these products. The following safety precau-
tions are offered as a guide which, if conscientious-
ly followed, will minimize the possibility of accidents
throughout the useful life of this equipment.
The vacuum should be operated only by those who
have been trained and delegated to do so, and who
have read and understood this Operator's Manual.
Failure to follow the instructions, procedures and
safety precautions in this manual can result in acci-
dents and injuries. Read this manual prior to start-
up.
NEVER start the vacuum unless it is safe to do so.
DO NOT attempt to operate the vacuum with a
known unsafe condition. Tag the vacuum and ren-
der it inoperative by disconnecting and locking out
all power at source or otherwise disabling its prime
mover, so others who may not know of the unsafe
condition, cannot attempt to operate it until the con-
dition is corrected.
Install, use and operate the vacuum only in full
compliance with all pertinent regulations and all
applicable Federal, State, and Local codes, stan-
dards and regulations.
DO NOT modify the vacuum and/or controls in any
way except with written factory approval.
While not specifically applicable to all types of vac-
uums with all types of prime movers, most of the
precautionary statements contained herein are
applicable to most vacuums and the concepts
behind these statements are generally applicable to
all vacuums.
1.2 PERSONAL PROTECTIVE EQUIPMENT
Prior to installing or operating the vacuum, owners,
employers and users should become familiar with,
and comply with, all applicable regulations and any
applicable Federal, State and Local codes, stan-
dards, and regulations relative to personal protec-
tive equipment, such as eye and face protective
equipment, respiratory protective equipment,
equipment intended to protect the extremities, pro-
tective clothing, protective shields and barriers and
electrical protective equipment, as well as noise
exposure administrative and/or engineering con-
trols and/or personal hearing protective equipment.
1.3 PRESSURE RELEASE
A. DO NOT use tools that are rated below the max-
imum rating of the vacuum. Select tools, pipes,
valves, filters and other fittings accordingly. DO
NOT exceed manufacturer's rated safe operating
pressures for these items.
B. Open fluid filler cap only when vacuum is not
running and is not pressurized. Shut down the vac-
uum and bleed the sump (receiver) to zero internal
pressure before removing the cap.
C. Vent all internal pressure prior to opening any
line, fitting, hose, valve, drain plug, connection or
other component, such as filters and line oilers.
D. Keep personnel out of line with and away from
the discharge.
E. DO NOT engage in horseplay with air hoses as
death or serious injury may result.
F. DO NOT tamper with sump relief valves or rup-
ture disc. Check the relief valve as recommended
in the Maintenance Section of this manual or at a
minimum of at least weekly to make sure it is not
blocked, clogged, obstructed or otherwise disabled.
DO NOT change the factory setting of the relief
valve.
G. If the vacuum is installed in an enclosed area, it
is necessary to vent the relief valve to the outside of
the structure or to an area of non-exposure.
1.4 FIRE AND EXPLOSION
A. Clean up spills of lubricant or other combustible
substances immediately, if such spills occur.
B. Shut off the vacuum and allow it to cool. Then
keep sparks, flames and other sources of ignition
away and DO NOT permit smoking in the vicinity
when checking or adding lubricant or when refilling
air line anti-icer systems with antifreeze compound.
C. DO NOT permit fluids, including air line anti-icer
system antifreeze compound or fluid film to accu-
mulate on, under, or around acoustical material, or
on any external surfaces of the air vacuum or on
internal surfaces of the enclosure. Wipe down using
an aqueous industrial cleaner or steam-clean as
required. If necessary, remove acoustical material,
clean all surfaces and then replace acoustical
When installing a Base Load Transfer
(BLT) System, remove jumpers
between 16-17 & 18-19 (Dual Control
vacuums) so the other vacuum does
not backfeed defeating the shutdown
circuitry.

Section 1
SAFETY
2
material. Any acoustical material with a protective
covering that has been torn or punctured should be
replaced immediately to prevent accumulation of
liquids or fluid film within the material. DO NOT use
flammable solvents for cleaning purposes.
D. Disconnect and lock out all power at source prior
to attempting any repairs or cleaning of the vacuum
or of the inside of the enclosure, if any.
E. Keep electrical wiring, including all terminals and
pressure connectors in good condition. Replace
any wiring that has cracked, cut abraded or other-
wise degraded insulation, or terminals that are
worn, discolored or corroded. Keep all terminals
and pressure connectors clean and tight.
F. Keep grounded and/or conductive objects such
as tools away from exposed live electrical parts
such as terminals to avoid arcing which might serve
as a source of ignition.
G. Remove any acoustical material or other materi-
al that may be damaged by heat or that may sup-
port combustion and is in close proximity, prior to
attempting weld repairs.
H. Keep suitable fully charged fire extinguisher or
extinguishers nearby when servicing and operating
the vacuum.
I. Keep oily rags, trash, leaves, litter or other com-
bustibles out of and away from the vacuum.
J. DO NOT operate the vacuum without proper flow
of cooling air or water or with inadequate flow of
lubricant or with degraded lubricant.
K. DO NOT attempt to operate the vacuum in any
classification of hazardous environment unless the
vacuum has been specially designed and manu-
factured for that duty.
1.5 MOVING PARTS
A. Keep hands, arms and other parts of the body
and also clothing away from couplings, fans and
other moving parts.
B. DO NOT attempt to operate the vacuum with the
fan, coupling or other guards removed.
C. Wear snug-fitting clothing and confine long hair
when working around this vacuum, especially when
exposed to hot or moving parts.
D. Keep access doors, if any, closed except when
making repairs or adjustments.
E. Make sure all personnel are out of and/or clear
of the vacuum prior to attempting to start or operate
it.
F. Disconnect and lock out all power at source and
verify at the vacuum that all circuits are de-ener-
gized to minimize the possibility of accidental start-
up or operation, prior to attempting repairs or
adjustments. This is especially important when vac-
uums are remotely controlled.
G. Keep hands, feet, floors, controls and walking
surfaces clean and free of fluid, water, or other liq-
uids to minimize the possibility of slips and falls.
1.6 HOT SURFACES, SHARP EDGES AND SHARP
CORNERS
A. Avoid bodily contact with hot fluid, hot coolant,
hot surfaces and sharp edges and corners.
B. Keep all parts of the body away from all points of
air discharge.
C. Wear personal protective equipment including
gloves and head covering when working in, on or
around the vacuum.
D. Keep a first aid kit handy. Seek medical assis-
tance promptly in case of injury. DO NOT ignore
small cuts and burns as they may lead to infection.
1.7 TOXIC AND IRRITATING SUBSTANCES
A. DO NOT use air from this vacuum for respiration
(breathing) except in full compliance with any
Federal, State or Local Codes or regulations.
B. DO NOT use air line anti-icer systems in air lines
supplying respirators or other breathing air utiliza-
tion equipment and DO NOT discharge air from
these systems in unventilated or other confined
areas.
C. Operate the vacuum only in open or adequately
ventilated areas. Pipe the discharge of the vacuum
out of the room it is installed in. DO NOT restrict
the discharge of the vacuum system.
D. Coolants and lubricants used in this vacuum are
typical of the industry. Care should be taken to
avoid accidental ingestion and/or skin contact. In
the event of ingestion, seek medical treatment
promptly. Wash with soap and water in the event of
skin contact. Consult the vacuum operator's man-
ual lubrication section for information pertaining to
vacuum fluid fill.
1.8 ELECTRICAL SHOCK
A. This vacuum should be installed and maintained
in full compliance with all applicable Federal, State
Death or serious injury can result from
inhaling compressed air without using
proper safety equipment.

Section 1
SAFETY
3
and Local codes, standards and regulations, includ-
ing those of the National Electrical Code, and also
including those relative to equipment grounding
conductors, and only by personnel that are trained,
qualified and delegated to do so.
B. Keep all parts of the body and any hand-held
tools or other conductive objects away from
exposed live parts of electrical system. Maintain dry
footing, stand on insulating surfaces and DO NOT
contact any other portion of the vacuum when mak-
ing adjustments or repairs to exposed live parts of
the electrical system. Make all such adjustments or
repairs with one hand only, so as to minimize the
possibility of creating a current path through the
heart.
C. Attempt repairs in clean, dry and well lighted and
ventilated areas only.
D. DO NOT leave the vacuum unattended with
open electrical enclosures. If necessary to do so,
then disconnect, lock out and tag all power at
source so others will not inadvertently restore
power.
E. Disconnect, lock out, and tag all power at source
prior to attempting repairs or adjustments to rotating
machinery and prior to handling any ungrounded
conductors.
F. Dry test all shutdown circuits prior to starting the
vacuum after installation.
1.9 LIFTING
A. If the vacuum is provided with a lifting bail, then
lift by the bail provided. If no bail is provided, then
lift by sling. vacuums to be air lifted by helicopter
must not be supported by the lifting bail but by
slings instead. In any event, lift and/or handle only
in full compliance with Federal, State and Local
codes.
B. Inspect points of attachment for cracked welds
and for cracked, bent, corroded or otherwise
degraded members and for loose bolts or nuts prior
to lifting.
C. Make sure entire lifting, rigging and supporting
structure has been inspected, is in good condition
and has a rated capacity of at least the weight of
the vacuum. If you are unsure of the weight, then
weigh vacuum before lifting.
D. Make sure lifting hook has a functional safety
latch or equivalent, and is fully engaged and latched
on the bail or slings.
E. Use guide ropes or equivalent to prevent twisting
or swinging of the vacuum once it has been lifted
clear of the ground.
F. DO NOT attempt to lift in high winds.
G. Keep all personnel out from under and away
from the vacuum whenever it is suspended.
H. Lift vacuum no higher than necessary.
I. Keep lift operator in constant attendance whenev-
er vacuum is suspended.
J. Set vacuum down only on a level surface capa-
ble of safely supporting at least its weight and its
loading unit.
K. When moving vacuums by forklift truck, utilize
fork pockets if provided. Otherwise, utilize pallet if
provided. If neither fork pockets or pallet are pro-
vided, then make sure vacuum is secure and well
balanced on forks before attempting to raise or
transport it any significant distance.
L. Make sure forklift truck forks are fully engaged
and tipped back prior to lifting or transporting the
vacuum.
M. Forklift no higher than necessary to clear obsta-
cles at floor level and transport and corner at mini-
mum practical speeds.
N. Make sure pallet-mounted vacuums are firmly
bolted or otherwise secured to the pallet prior to
attempting to forklift or transport them. NEVER
attempt to forklift a vacuum that is not secured to its
pallet, as uneven floors or sudden stops may cause
the vacuum to tumble off, possibly causing serious
injury or property damage in the process.
O. DO NOT use the lifting eye bolt on the vacuum
motor, if supplied, to lift the entire vacuum package.
1.10 ENTRAPMENT
A. If the vacuum enclosure is large enough to hold
a person and if it is necessary to enter it to perform
service adjustments, inform other personnel before
doing so, or else secure and tag the access door in
the open position to avoid the possibility of others
closing and possibly latching the door with person-
nel inside.
B. Make sure all personnel are out of vacuum
before closing and latching enclosure doors.

NOTES
4

Section 2
DESCRIPTION
5
2.1 INTRODUCTION
Your new Sullair flood-lubricated Rotary Screw
Vacuum system will provide you with improved reli-
ability and greatly reduced maintenance.
Compared to other vacuum pumps, the Sullair
Rotary Screw is unique in mechanical reliability and
lack of "wear". Furthermore, the internal working
parts of the vacuum unit do not require any inspec-
tion.
2.2 DESCRIPTION OF COMPONENTS
Refer to Figure 2-1A or 2-1B. The components and
assemblies of the Sullair vacuum system are clear-
ly shown. The complete package includes vacuum
unit,electric motor, starter, inlet system, dis-
charge system, lubrication and cooling system,
capacity control system and instrumentation.
An electric motor-driven fan forces air through the
cooler (mounted at the end of the frame), thereby
removing the compression heat from the cooling
fluid.
The "open" design of the Sullair vacuum system,
provides easy access to all components.
2.3 SULLAIR VACUUM SYSTEM, FUNCTIONAL
DESCRIPTION
The Sullair vacuum system features the Sullair vac-
uum unit, a single-stage, positive displacement,
flood lubricated vacuum unit. This unit provides
continuous pulse-free vacuum to meet your needs.
Read Section 6 (Maintenance) to keep
your vacuum pump in top operating
condition. Should any questions arise
which cannot be answered in the fol-
lowing text, call your nearest Sullair
representative or the Sullair
Corporation Service Department.
Figure 2-1A Sullair Rotary Screw Vacuum System - Air-cooled
KEY NO. DESCRIPTION QUANTITY KEY NO. DESCRIPTION QUANTITY
1AIR FILTER 1 7 SUMP TANK 2
2AIR INLET 1 8 AIR-COOLER 1
3FLUID FILTER 1 9 CONTROL BOX 1
4VACUUM UNIT 1 10 INSTRUMENT PANEL 1
5SULLICON CONTROL 111 SIGHT GLASSES 2 / SUMP TANK
6 MOTOR 1 12 FLUID FILL PORT 1 / SUMP TANK

Section 2
DESCRIPTION
6
With a Sullair machine, there will be no internal
maintenance or inspection of the vacuum unit per-
mitted in accordance with the terms of warranty.
Fluid is injected into the vacuum unit and mixes
directly with the gas as the internal rotors turn,
drawing a vacuum. The fluid flow has three main
functions:
1. As coolant, it controls the rise of air tem-
perature normally associated with the heat
of compression.
2. Seals the leakage paths between the rotors
and the stator and also between the rotors'
meshes.
3. Acts as a lubricating film between the rotors
allowing one rotor to directly drive the other,
which is an idler.
After the gas/fluid mixture has been discharged
from the vacuum unit, the fluid is separated from
the gas. At this time, the gas is discharged from the
separator tank and the fluid is cooled in preparation
for reinjection.
2.4 COOLING AND LUBRICATION SYSTEM, FUNC-
TIONAL DESCRIPTION
Refer to Figure 2-2. The Cooling and Lubrication
System consists of a fan, fan motor, radiator-
type cooler, fluid filter, unit-driven fluid pump,
fluid regulating valves, cooler thermal bypass
valve along with interconnecting piping, tubing
and hoses.
A unit-driven fluid pump causes fluid flow by draw-
ing the fluid from the sump, through a fluid pump
suction strainer, and pressurized to 25-30 psig to
the system.
The fluid is delivered from the receiver/sump to the
cooler thermal bypass valve. The thermal bypass
valve has a nominal temperature of 175°F (79°C).
Figure 2-1B Sullair Rotary Screw Vacuum System - Water-cooled
KEY NO. DESCRIPTION QUANTITY KEY NO. DESCRIPTION QUANTITY
1AIR FILTER 1 7 SUMP TANK 2
2AIR INLET 1 8 WATER-COOLER 1
3FLUID FILTER 1 9 CONTROL BOX 1
4VACUUM UNIT 1 10 INSTRUMENT PANEL 1
5SULLICON CONTROL 111 SIGHT GLASSES 2 / SUMP TANK
6 MOTOR 1 12 FLUID FILL PORT 1 / SUMP TANK

Section 2
DESCRIPTION
Figure 2-2 Vacuum Unit Cooling and Lubrication System
KEY NO. DESCRIPTION QUANTITY
1 SUMP TANKS 2
2 COOLER 1
3 THERMAL VALVE 1
4FLUID FILTER 1
5VACUUM UNIT 1
FLUID FLOW DIRECTION
7
AIR-COOLED
MODEL
WATER-COOLED
MODEL

Section 2
DESCRIPTION
8
At low temperatures, the fluid passes through the
thermal, the fluid filter, and then directly into the
vacuum unit. As the discharge temperature rises
above 175°F (79°C), due to the heat of compres-
sion, the cooler fluid bypass valve begins to close
and a portion of the fluid then flows through the
cooler; from the cooler to the fluid filter, and then to
the vacuum unit.
A portion of the fluid is routed to the anti-friction
bearings which support the rotors inside the vacu-
um unit. Prior to entering the vacuum unit the fluid
flows through the fluid filter, thus assuring properly
filtered lubricant for bearing supply and rotor injec-
tion.
The fluid filter has a replacement element and an
integral pressure bypass valve.
The pressure regulators are factory set prior to
delivery. One regulator is to protect the system
from over pressurization due to a possible down-
stream blockage in the piping. The other regulator
controls the injection pressure to the vacuum unit.
2.5 DISCHARGE SYSTEM, FUNCTIONAL DESCRIP-
TION
Refer to Figure 2-3. The vacuum unit discharges
compressed gas/fluid mixture into the combination
receiver/sump. The receiver has three main func-
tions:
1. Acts as the primary fluid separator.
2. Serves as the fluid sump.
3. Houses the final fluid separator element (s).
The compressed gas/fluid mixture enters the sump
and is directed against the side of the tank. Its
direction of movement is changed and its velocity
significantly reduced, causing large droplets of fluid
to form and fall to the bottom of the sump. The frac-
tional percentage of fluid remaining in the com-
pressed gas collects on the surface of the separa-
tor element(s) as the compressed gas flows
through the separator. A return line (or scavenge
tube) leads from the bottom of the separator ele-
ment(s) to the inlet region of the vacuum unit. Fluid
collecting on the bottom of the separator(s) is
returned to the vacuum unit by the pressure differ-
ence between the receiver and the vacuum unit
inlet. Sight glasses are located in the return line for
the observance of this fluid flow. A gauge located on
top of the electrical enclosure indicates abnormal
pressure drop through the separator element. At
this time, separator element replacement is neces-
sary.
All Sullair vacuum systems are equipped with a
high pressure shutdown switch to shut down the
Figure 2-3 Vacuum Unit Discharge System
KEY NO. DESCRIPTION QUANTITY
1 SUMP TANKS 2
2AIR INLET 1
3AIR INLET VALVE 1
4VACUUM UNIT 1
FLUID/AIR
AIR

Section 2
DESCRIPTION
9
vacuum system at 12 psig (83kPa). A temperature
switch will shut the vacuum system down if the dis-
charge temperature reaches 235ºF (113ºC).
A Carbon rupture disk will open if the sump pres-
sure reaches 15 psig (103kPa). If this happens,
rupture disk must be replaced.
Fluid is added to the sump via a capped fluid filler
opening, placed low on the tank to prevent overfill-
ing the sump. A bull’s-eye sight glass enables the
operator to visually monitor the sump fluid level.
DO NOT remove caps, plugs, and/or other compo-
nents when vacuum system is running.
2.6 CONTROL SYSTEM, FUNCTIONAL DESCRIP-
TION
Refer to Figure 2-4. The purpose of the VS control
system is to regulate the vacuum unit gas intake to
match the amount of gas being introduced into the
vacuum system. At a 0 to 100% of gas input, the
control system will automatically throttle the
machine and reduce the power consumption. The
control system consists of a Sullicon Control, a
butterfly valve (located on the vacuum unit inlet)
and a vacuum regulator. The control system will
also include a vacuum switch and solenoid valve if
the machine is equipped with dual control (option-
al). The functional description of the control system
is described below in three distinct phases of vacu-
um system operation. The following descriptive text
applies to all VS-32 Series machines. For explana-
tory purposes, this description will apply to a
machine with an operating vacuum level of 20 in-
Hg. (508mm). A machine with any other vacuum
level would operate in the same manner excepting
stated vacuums.
START MODE - 0 TO 15 IN-HG. (381MM)
When the vacuum system START button is
depressed, the vacuum downstream of the inlet
butterfly valve will quickly rise to approximately 15
in-Hg. at which time the butterfly gradually begins to
open. As the system vacuum is increased, the but-
terfly continues to open until the system vacuum
reaches approximately 15 in-Hg. (381mm) at which
time the vacuum system is operating at full capaci-
ty.
NORMAL OPERATING MODE - 15 TO 20 IN-HG.
(381 TO 508MM)
When the system vacuum rises above 15 in-Hg.
(381mm), the inlet butterfly valve is open and gas is
drawn from the system at full capacity of the vacu-
um unit. From this point on, the system vacuum is
continually monitored by a vacuum gauge. The vac-
uum regulator remains closed during this phase,
Figure 2-4 Control System
START
FULL LOAD
MODULATION
KEY NO. DESCRIPTION QTY
1VACUUM REGULATOR VALVE 1
2SULLICON CONTROL 1
3 ORIFICE 1
4CHECK VALVE 1
5VACUUM PUMP 1

keeping the Sullicon control inactive.
MODULATING MODE - 20 TO 23 IN-HG. (508 TO
584MM)
If less gas than the rated capacity of the vacuum
unit is being admitted to the system, the system
vacuum will rise above 20 in-Hg. (508mm). The
vacuum regulator valve gradually opens, applying
atmospheric air pressure through the control line to
the diaphragm chamber of the Sullicon control,
which then partially closes the butterfly valve on the
vacuum unit inlet. This reduces the amount of gas
entering the vacuum unit until it matches the
amount of gas being admitted to the system. The
control system functions continually in this manner,
between the limits of 20 to 23 in-Hg. (508 to
584mm) in response to varying demands from the
system.
DUAL CONTROL OPTION - ABOVE 23 IN-HG.
(584MM)
For a machine with varied periods of time when
there are no vacuum requirements, a "dual-control"
option is available. This option allows you to set the
machine in an automatic position whereby the
machine will shut down when no vacuum require-
ment is present and restart when the system vacu-
um decreases. This is accomplished through the
vacuum switch. When the system vacuum reaches
23 in-Hg. (584mm), the switch contacts open which
de-energize the solenoid valve. Atmospheric air
pressure is admitted to the Sullicon diaphragm
which holds the butterfly valve closed.
Simultaneously, a timing relay starts. When the tim-
ing relay is satisfied, it will shut the vacuum system
down, when the lower setting 20 in-Hg. (508mm) of
the vacuum switch is reached, and the machine will
automatically restart.
2.7 INLET SYSTEM, FUNCTIONAL DESCRIPTION
The VS inlet system consists of a dry-type inlet fil-
ter, a check valve and an inlet butterfly valve.
The butterfly-type inlet valve directly controls the
amount of gas intake to the vacuum unit in
response to the operation of the Sullicon control
(Section 2.6).
The check valve prevents discharge gas and fluid
from being drawn into the system and reverse run-
ning of the vacuum unit during shutdown.
2.8 INSTRUMENTATION, FUNCTIONAL DESCRIP-
TION
Refer to Figure 2-5A (single control), or Figure 2-5B
(dual control). The instrumentation of the vacuum
system consists of a panel group which will contin-
ually monitor the operating condition of the
machine. The gauges supplied with the machine
include an hourmeter, a discharge temperature
gauge, separator maintenance gauge, and sys-
tem vacuum gauge, and the unit vacuum inlet
gauge.
• The hourmeter records cumulative hours of
operation for the vacuum system and is use-
ful for planning/logging service operations.
Section 2
DESCRIPTION
10
Figure 2-5A Instrumentation Panel - Single Control
KEY
NO. DESCRIPTION KEY NO. DESCRIPTION
1 HOURMETER 7 STOP BUTTON
2
SYSTEM
VACUUM
GAUGE
8POWER LIGHT
(RED)
3
VACUUM UNIT
INLET VACUUM
GAUGE
9
DISCHARGE
TEMPERATURE
GAUGE
4
FLUID
PRESSURE
GAUGE
10
FLUID FILTER
MAINTENANCE
GAUGE
5START BUTTON
(GREEN) 11
SEPARATOR
MAINTENANCE
GAUGE
6ON LIGHT
(GREEN)

• The discharge temperature gauge moni-
tors the temperature of the vacuum unit dis-
charge gas/fluid. The normal reading should
be approximately 180ºF (82ºC) with 80ºF
(27ºC) ambient temperature.
• The separator maintenance gauge moni-
tors the condition of the separator element
(s) and indicates when the element restric-
tion is excessive.
• The system vacuum gauge continually
monitors the vacuum at various load and
unload conditions.
• The unit vacuum inlet gauge continually
monitors the vacuum at various load condi-
tions along with the condition of the inlet fil-
ter (done by comparing the vacuum differ-
ential between the two vacuum gauges).
• The fluid pressure gauge continually mon-
itors the pressure at the vacuum unit injec-
tion.
• The fluid filter maintenance gauge moni-
tors the condition of the fluid filter element
and indicates when the element(s) should
be changed.
Section 2
DESCRIPTION
11
Figure 2-5B Instrumentation Panel- Dual Control
KEY
NO. DESCRIPTION KEY NO. DESCRIPTION
1 HOURMETER 8 ON LIGHT
(GREEN)
2
SYSTEM
VACUUM
GAUGE
9AUTO LIGHT
(AMBER)
3
VACUUM UNIT
INLET VACUUM
GAUGE
10 POWER LIGHT
(RED)
4
FLUID
PRESSURE
GAUGE
11 START BUTTON
(GREEN)
5
DISCHARGE
TEMPERATURE
GAUGE
12 SELECTOR
SWITCH
6
FLUID FILTER
MAINTENANCE
GAUGE
13 STOP BUTTON
(RED)
7
SEPARATOR
MAINTENANCE
GAUGE

NOTES
12

Section 3
SPECIFICATIONS
13
VACUUM SYSTEM
Type: Lubricated Rotary Screw
Maximum Operating Vacuum: 29.5in.Hg. (750mm) – sea level
Maximum Ambient Operating Temperature (II):105°F (40°C)
Inlet Gas Temperature: Consult Figure 3-2
Bearing Type: Anti-Friction
Cooling: Pressurized Fluid
Lubricant: SRF 1/4000 or Sullube
System Capacity: 55 gallons / 208 liters
Control: Vacuum
(II) Special machines are available for operation in higher and lower ambient temperatures.
3.1 SPECIFICATIONS
PACKAGE
TYPE
MOUNTING LENGTH WIDTH HEIGHT (I) WEIGHT
IN MM IN MM IN MM LB KG
VS-32
with canopy BASE 136 3454 71.69 1021 84.09 2136 9250 4196
VS-32
without canopy BASE 136 3454 71.69 1021 84.09 2136 9900 4491
(I) Dimensions less inlet filter (Refer to identification drawing for additional dimensions).
For latest sound test data, consult Sullair factory.
VACUUM SYSTEM MOTORS/STARTERS
Size: 150 HP / 113 KW
Type: 60Hz, 3 Phase, ODP, 230/460VAC
40°C Maximum Ambient Temperature
Options: 208, 220, 400 and 575V; TEFC also available
Speed: 3500 RPM @ 60Hz (2970 RPM @ 50Hz)
Starter: Magnetic Full Voltage
Shaft Diameter: 1 3/8” / 35 mm
Size: 200 HP / 150 KW
Type: 60 Hz, 3 Phase, ODP, 230/460 VAC
40°C Maximum Ambient Temperature
Options: 208V and 575V; TEFC also available
Speed:
Starter:
Shaft Diameter:

Section 3
SPECIFICATIONS
14
3.2 LUBRICATION GUIDE - STANDARD VACUUMS
Refer to Figure 3-1 for fluid fill port location. Sullair
vacuums are filled with SRF 1/4000 fluid or Sullube
at factory.
SRF 1/4000 and Sullube fluid should be changed
every 4000 hours or once a year, whichever comes
first. The fluid should be changed more frequently
under severe operating conditions, such as high
ambient temperatures coupled with high humidity,
or when high particulate level, corrosive gases or
strong oxidizing gases are present in the air.
For extended life synthetic lubricants contact the
nearest Sullair representative.
Maintenance of all other components is still recom-
mended as indicated in the Operator's Manual.
SRF may not be compatible with certain corrosive
or oxidizing gases. Consult Sullair for lubrication
recommendations in such cases.
When handling gases saturated with water vapor,
condensed moisture and emulsification may occur.
The lubricant must be changed when this condition
exits. If this operational condition exists, a lubricant
with enhanced rust, oxidation and foam inhibiting
characteristics, and enhanced water separation
characteristics should be used. Water must be
drained from the fluid sump periodically. Contact
Sullair for a lubricant recommendation.
Also, when ambient conditions are extreme, the
use of “extended" life synthetic lubricants may be
warranted. Contact Sullair for a recommendation.
3.3 APPLICATION GUIDE
Sullair encourages the user to participate in a fluid
analysis program with the fluid suppliers. This could
result in a fluid change interval differing from that
stated in the manual. Contact your Sullair repre-
sentative for details.
3.4 VACUUM INLET MAXIMUM TEMPERATURE FOR
NO CONDENSATION
Refer to Figure 3-2. Due to the fact that water
vaporizes rapidly in the presence of vacuum, any
application where liquid water is subjected to sys-
tem vacuum must be treated as a saturated or
super saturated gas stream.
Some applications/installations will allow cooling of
the saturated process air between the process and
the vacuum system inlet. In this case, liquid water
will condense and move through the system
towards the vacuum system inlet. The balance of
the process air is still saturated, but at a lower tem-
perature. This saturated air cannot hold any addi-
tional moisture and, therefore, the condensed liquid
water must be removed prior to the vacuum system
inlet.
Example 1:
Inlet Air Temperature = 70°F
Inlet Vacuum = 24” Hg
Point on graph is below both discharge temperature
curves; therefore no condensing issues are pres-
ent.
Example 2:
Inlet Air Temperature = 130°F
Inlet Vacuum = 26” Hg
Point on graph is shows discharge must be at least
190°F to assure no condensing issues.
Example 3:
Inlet Air Temperature = 90°F
Inlet Vacuum = 27” Hg
Mixing of other fluids within the com-
pressor will void all warranties.
Figure 3-1 Fluid Fill Port Location
KEY NO. DESCRIPTION QUANTITY
1 SUMP TANKS 2
2UPPER SIGHT GLASS 1 / SUMP
3LOWER SIGHT GLASS 1 / SUMP
4FLUID FILL PORT 1 / SUMP
5DRAIN VALVE 1