Sullair VS16 30HP Series Installation and maintenance instructions

OPERATOR’S
MANUAL AND
PARTS LIST
KEEP FOR
FUTURE
REFERENCE
Part Number
02250156-647
©Sullair Corporation
SULLAIR ROTARY
VACUUM SYSTEM
VS-16
30-50 HP / 22-37 KW
Air-cooled and Water-cooled

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 11.1 GENERAL
11.2 PERSONAL PROTECTIVE EQUIPMENT
11.3 PRESSURE RELEASE
11.4 FIRE AND EXPLOSION
21.5 MOVING PARTS
21.6 HOT SURFACES, SHARP EDGES AND SHARP CORNERS
21.7 TOXIC AND IRRITATING SUBSTANCES
21.8 ELECTRICAL SHOCK
31.9 LIFTING
31.10 ENTRAPMENT
Section 2
DESCRIPTION 52.1 INTRODUCTION
52.2 DESCRIPTION OF COMPONENTS
52.3 ROTARY SCREW VACUUM SYSTEM, FUNCTIONAL
DESCRIPTION
52.4 COOLING AND LUBRICATION SYSTEM, FUNCTIONAL
DESCRIPTION
13 2.5 DISCHARGE SYSTEM, FUNCTIONAL DESCRIPTION
13 2.6 CONTROL SYSTEM, FUNCTIONAL DESCRIPTION
14 2.7 INLET SYSTEM, FUNCTIONAL DESCRIPTION
15 2.8 INSTRUMENTATION, FUNCTIONAL DESCRIPTION
Section 3
SPECIFICATIONS 17 3.1 SPECIFICATIONS - VS-16 30-50HP / 22-37KW
19 3.2 LUBRICATION GUIDE AND APPLICATION GUIDE
20 Figure 3-2A Identification - VS-16 30-40HP/ 22-30KW Air-cooled
21 Figure 3-2B Identification - VS-16 30-40HP/ 22-30KW
Water-cooled
22 Figure 3-2C Identification - VS-16 50HP/ 37KW Air-cooled
23 Figure 3-2D Identification - VS-16 50HP/ 37KW Water-cooled
24 Figure 3-3A Piping and Instrumentation - 30-40HP/ 22-30KW
Air-cooled
Continued on next page
OPERATOR IS REQUIRED TO READ
ENTIRE INSTRUCTION MANUAL

TABLE OF CONTENTS
Section 3
SPECIFICATIONS 28 Figure 3-3B Piping and Instrumentation - 30-40HP/ 22-30KW
(continued) Water-cooled
32 Figure 3-3C Piping and Instrumentation - 50HP/ 37KW
Air-cooled
36 Figure 3-3D Piping and Instrumentation - 50HP/ 37KW
Water-cooled
Section 4
INSTALLATION 41 4.1 MOUNTING OF VACUUM SYSTEM
41 4.2 VENTILATION AND COOLING
41 4.3 VACUUM SYSTEM PIPING
41 4.4 COUPLING ALIGNMENT CHECK
41 4.5 FLUID LEVEL CHECK
42 4.6 MOTOR ROTATION DIRECTION CHECK
42 4.7 ELECTRICAL PREPARATION
42 4.8 RUPTURE DISK
Section 5
OPERATION 43 5.1 GENERAL
43 5.2 PURPOSE OF CONTROLS
44 5.3 INITIAL START-UP PROCEDURE
44 5.4 SUBSEQUENT START-UP PROCEDURE
44 5.5 SHUTDOWN PROCEDURE
45 5.6 AUTOMATIC RE-START OPTION
Section 6
MAINTENANCE 47 6.1 GENERAL
47 6.2 DAILY OPERATION
47 6.3 MAINTENANCE AFTER INITIAL 50 HOURS
OF OPERATION
47 6.4 MAINTENANCE EVERY 4000 HOURS
47 6.5 MOTOR BEARINGS
47 6.6 FLUID FILTER MAINTENANCE
47 6.7 PARTS REPLACEMENT AND ADJUSTMENT
PROCEDURES
47 FLUID FILTER ELEMENT REPLACEMENT
48 INLET AIR FILTER MAINTENANCE
48 SEPARATOR ELEMENT REPLACEMENT -
30-40HP / 22-30KW
49 SEPARATOR ELEMENT REPLACEMENT - 50HP / 37KW
Continued on next page

TABLE OF CONTENTS
Section 6
MAINTENANCE
(continued) 50 CONTROL SYSTEM ADJUSTMENT
51 FLUID RETURN/SIGHT GLASS MAINTENANCE
51 DRIVE COUPLING INSTALLATION
51 6.8 TROUBLESHOOTING - INTRODUCTION
51 6.9 TROUBLESHOOTING - GUIDE
Section 7
ILLUSTRATIONS
AND PARTS LIST 55 7.1 PROCEDURE FOR ORDERING PARTS
56 7.2 RECOMMENDED SPARE PARTS LIST
58 7.3 FRAME, MOTOR, COMPRESSOR AND PARTS -
30-40HP/22-30KW
62 7.4 FRAME, MOTOR, COMPRESSOR AND PARTS -
VS-16 50HP/37KW
66 7.5 AIR INLET SYSTEM
70 7.6 DISCHARGE SYSTEM - 30-40HP/22-30KW
72 7.7 DISCHARGE SYSTEM - 50HP/37KW
76 7.8 COOLER ASSEMBLY - AIR-COOLED
78 7.9 COOLER ASSEMBLY - WATER-COOLED
80 7.10 FLUID PIPING SYSTEM - AIR-COOLED
82 7.11 FLUID PIPING SYSTEM - WATER-COOLED
84 7.12 WATER PIPING SYSTEM
86 7.13 CONTROL SYSTEM
88 7.14 CONTROL SYSTEM - DUAL CONTROL
90 7.15 CONTROL SYSTEM - DUAL CONTROL
WITH ANNUNCIATOR
94 7.16 SULLICON CONTROL SYSTEM
96 7.17 CONTROL PANEL - SINGLE CONTROL
98 7.18 CONTROL PANEL - DUAL CONTROL
100 7.19 ENCLOSURE - 30-40HP/22-30KW AIR-COOLED
102 7.20 ENCLOSURE - 50HP/22-37KW AIR-COOLED
104 7.21 ENCLOSURE - 30-40HP/22-30KW WATER-COOLED
106 7.22 ENCLOSURE - 50HP/37KW WATER-COOLED
108 7.23 DECAL GROUP
114 7.24 DECAL LOCATIONS - AIR-COOLED (TYPICAL)
116 7.25 DECAL LOCATIONS - WATER-COOLED (TYPICAL)
118 7.26 DECAL LOCATIONS - CONTROL BOX INTERIOR
120 7.27 WIRING DIAGRAM - VS-16 MFV SINGLE
CONTROL ANNUNCIATION
Continued on next page

Section 7
ILLUSTRATIONS
AND PARTS LIST 121 7.28 WIRING DIAGRAM - VS-16 MFV DUAL CONTROL MCP28
(continued) 122 7.29 WIRING DIAGRAM - VS-16 MFV DUAL CONTROL
123 7.30 WIRING DIAGRAM - VS-16 SSRV DUAL CONTROL

Section 1
SAFETY
1
1.1 GENERAL
Sullair® Corporation and its subsidiaries designs
and manufactures 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 System 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 instruc-
tions, procedures and safety precautions in this
manual can result in accidents and injuries.
NEVER start this Vacuum System unless it is safe
to do so. DO NOT attempt to operate the Vacuum
System with a known unsafe condition. Tag the
Vacuum System and render it inoperative by dis-
connecting and locking out all power at source or
otherwise disabling its prime mover so others who
may not know of the unsafe condition will not
attempt to operate it until the condition is corrected.
Install, use and operate this Vacuum System only in
full compliance with all pertinent OSHA regulation
and all applicable Federal, State, and Local codes
or requirements.
DO NOT modify this Vacuum System and/or con-
trols in any way except with written factory
approval.
While not specifically applicable to all types of
Vacuum Systems with all types of primer movers,
most of the precautionary statements contained
herein are applicable to most Vacuum Systems,
and the concepts behind these statements are gen-
erally applicable to all Vacuum Systems.
1.2 PERSONAL PROTECTIVE EQUIPMENT
Prior to installing or operating this Vacuum System,
owners, employers, and users should become
familiar with, and comply with, all applicable OSHA
regulations, and any other applicable Federal,
State, and Local codes, standards and regulations
relative to personal protective equipment, such as
eye and face protective equipment, respiratory pro-
tective equipment, equipment intended to protect
the extremities, protective clothing, protective
shields, and barriers, and electrical protective
equipment, as well as noise exposure administra-
tive and/or engineering controls and/or personal
hearing protective equipment.
1.3 PRESSURE RELEASE
A. Open fluid filler cap only when Vacuum System
is not running and the receiver is not pressurized.
Shut down the Vacuum System and bleed the sump
(receiver) to zero internal pressure before removing
the cap.
B. Vent all internal pressure prior to opening any
line, fitting, hose, valve, drain plug, connection or
other component, such as filters.
1.4 FIRE AND EXPLOSION
A. Clean up spills of lubricant, or other combustible
substances immediately when such spills occur.
B. Shut off Vacuum System and allow it to cool.
Then keep sparks, flames and other sources of igni-
tion away and DO NOT permit smoking in the vicin-
ity when checking or adding lubricant.
C. DO NOT permit liquids or fluid film to accumulate
on, under or around acoustical material, or on any
external surfaces of the Vacuum System or on inter-
nal 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
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
System, or of the inside of the enclosure, if any.
E. Keep electrical wiring, including all terminals and
other pressure connectors in good condition.
Replace any wiring that has cracked, cut, abraded
or otherwise degraded insulation, or terminals that
are worn, discolored or corroded. Keep all termi-
nals 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 to weld repairs.
OPERATOR IS REQUIRED TO READ ENTIRE
INSTRUCTION MANUAL

Section 1
SAFETY
2
H. Keep a suitable fully charged class BC or ABC
fire extinguisher or extinguishers nearby when serv-
icing and operating the Vacuum System.
I. Keep oily rags, trash, leaves, litter or other com-
bustibles out of and away from the Vacuum System.
J. DO NOT operate Vacuum System 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 System
in any classification of hazardous environment
unless the Vacuum System has been specifically
designed and manufactured for that duty.
1.5 MOVING PARTS
A. Keep hands, arms and other parts of the body
and also clothing away from belts, pulleys and other
moving parts.
B. DO NOT attempt to operate the Vacuum System
with the fan, coupling or other guards removed.
C. Wear snug fitting clothing and confine long hair
when working around this Vacuum System, espe-
cially 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 System prior to attempting to start or
operate it.
F. Disconnect and lock out all power at source and
verify at the Vacuum System that all circuits are de-
engergized, to minimize the possibility of accidental
start-up or operation, prior to attempting repairs or
adjustments. This is especially important when
Vacuum Systems are remotely controlled.
G. Keep hands, feet, floors controls and walking
surfaces clean and free of fluid, water, antifreeze or
other liquids to minimize 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
gas discharge.
C. Wear personal protective equipment including
gloves and head covering when working in, on or
around the Vacuum System.
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 System for
respiration (breathing) except in full compliance
with OSHA Standards 29 CFR 1910 and any other
Federal, State or Local Codes or regulations.
Death or serious injury can occur from inhaling air
from the discharge of a Vacuum System without
using proper safety equipment. See OSHA stan-
dards on safety equipment.
B. Operate the Vacuum System only in open or
adequately ventilated areas.
C. Install the Vacuum System so that it is not likely
to ingest exhaust fumes or other toxic, noxious or
corrosive fumes or substances.
D. Coolants and lubricants used in this Vacuum
System are typical of the industry. Care should be
taken to avoid accidental ingestions and/or skin
contact. In the event of ingestion seek medical
treatment promptly. Wash with soap and water in
the event of skin contact.
E. The Vacuum System discharge must be piped to
an open and well ventilated area.
1.8 ELECTRICAL SHOCK
A. This Vacuum System should be installed and
maintained in full compliance with all applicable
Federal, State and Local codes, standards and reg-
ulations, including those of the National Electrical
Code, and also including those relative to equip-
ment 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 System
when making 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 only in clean, dry and well light-
ed and ventilated areas.
D. DO NOT leave the Vacuum System unattended
Death or serious injury can result from
inhaling compressed air without using
proper safety equipment. See OSHA stan-
dards and/or any applicable Federal, State,
and Local codes, standards and regula-
tions on safety equipment.

Section 1
SAFETY
3
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.
1.9 LIFTING
A. If the Vacuum System is provided with a lifting
bail, then lift by the bail provided. If no bail is pro-
vided then lift by sling. Vacuum Systems to be air
lifted by helicopter must not be supported by the lift-
ing bail, but by slings instead. In any event, lift only
in full compliance with OSHA Standards 29 CFR
1910 subpart N.
B. Inspect lifting bail and 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 conditions
and has a rated capacity of at least the weight of the
Vacuum System. If you are unsure of the weight,
then weigh the Vacuum System 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 machine 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 System when it is suspended.
H. Lift Vacuum System no higher than necessary.
I. Keep lift operator in constant attendance whenev-
er Vacuum System is suspended.
J. Set Vacuum System down only on level surfaces
capable of supporting at least its weight and unit
loading.
K. When moving Vacuum System by forklift truck,
utilize fork pockets if provided. If neither fork pock-
ets or pallet are provided, then make sure machine
is secure and well balanced on forks before
attempting to raise or transport it any significant dis-
tance.
L. Make sure forklift truck forks are fully engaged
and tipped back prior to lifting or transporting the
Vacuum System.
M. Forklift no height than necessary to clear obsta-
cles at floor level, and transport and corner at mini-
mum practical speeds.
N. Make sure pallet mounted Vacuum Systems are
firmly bolted or otherwise secured to the pallet prior
to attempting to forklift or transport them. Never
attempt to forklift a Vacuum System that is not
secured to its pallet, as uneven floors or sudden
stops may cause the Vacuum System to tumble off,
possibly causing serious injury or property damage
in the process.
1.10 ENTRAPMENT
A. If the Vacuum System enclosure, if any, is large
enough to hold a person, and it it is necessary to
enter it to perform service or 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 personnel inside.
B. Make sure all personnel are out Vacuum System
before closing and latching enclosure doors.

NOTES
4

Section 2
DESCRIPTION
5
2.1 INTRODUCTION
Your new Sullair flood-lubricated Rotary Screw
Vacuum System, provides you with superior per-
formance and greatly reduced maintenance.
Compared to other vacuum pumps, the Sullair
Rotary Screw is unique for its reliability and lack of
wear. The vacuum unit requires absolutely no
inspection of its internal parts.
Read Section 6 (Maintenance) to keep your
Vacuum System in top operating condition. Should
any problem or question arise which cannot be
answered in this text, contact your nearest Sullair
representative or the Sullair Corporation Service
Department.
2.2 DESCRIPTION OF COMPONENTS
Refer to Figures 2-1A, 2-1B, 2-1C, 2-1D, 2-2A, 2-
2B, 2-3, and 2-4. The components and assemblies
of the VS-16 Series Vacuum System is clearly
shown. A complete package includes vacuum unit,
electric motor, starter, inlet system, discharge sys-
tem, lubrication and cooling system, capacity con-
trol system and instrumentation.
On air-cooled models, an electric motor-driven fan
pushes air through the cooler (mounted at the top
of the machine), thereby removing the heat of com-
pression from the cooling fluid.
On water-cooled models, a shell and tube heat
exchanger is mounted on the control panel sup-
ports. Fluid is piped into the four-pass exchanger
where the heat of compression is removed from
the fluid.
The "open" design of the VS-16 Series Vacuum
Pump (whether air-cooled or water-cooled), pro-
vides easy access to all components.
2.3 ROTARY SCREW VACUUM SYSTEM, FUNC-
TIONAL DESCRIPTION
The Sullair Vacuum System utilizes the rotary
screw, single stage, positive displacement flood-
lubricated type of vacuum unit. It provides a contin-
uous (pulse-free) vacuum to meet your needs.
Fluid is injected into the vacuum unit where it mixes
directly with the gas as the internal rotors turn draw-
ing a vacuum. The fluid flow has three basic func-
tions:
1. As coolant, it controls the rise of air tem-
perature normally associated with the heat
of compression.
2. It seals the leakage paths between the
rotors and the stator and also between the
rotors meshes.
3. It acts as a lubricating film between the
rotors allowing one rotor to directly drive the
other (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 2-2A or 2-2B. The cooling and lubri-
cation system (air-cooled version) consists of a fan,
fluid pump, pump suction strainer, radiator-type
cooler, main line filter, cooler thermal bypass valve,
fluid pressure relief valve and interconnecting pip-
ing and tubing.
For the water-cooled models, a shell and tube heat
exchanger and water-flow regulating valve are sub-
stituted for the radiator-type cooler listed above.
The unit-driven fluid pump causes fluid flow by
drawing the fluid from the sump and forcing it to an
area of lower pressure in the vacuum unit. Proper
fluid pressure at the vacuum unit is ensured by a
pressure regulator which is located downstream of
the fluid filter.
On air-cooled models, the fluid is pumped from the
receiver/sump to the thermal valve. The thermal
valve has a nominal temperature of 170ºF (77ºC).
At low temperatures, the fluid passes through the
thermal valve, the filter and directly to the vacuum
unit. As the discharge temperature rises above
170ºF (77ºC), due to the heat of compression, the
cooler bypass valve begins to close and a portion of
the fluid then flows through the cooler; from the
cooler to the filter, and on to the vacuum unit.
On water-cooled models, a water-flow regulating
valve will regulate the amount of cooling water nec-
essary to maintain the proper operating tempera-
ture. When the fluid leaves the sump it is pumped
to the cooler. Depending on the temperature of the
fluid, the water-flow regulating valve allows the
proper amount of cool water to enter the cooler and
remove the heat of compression from the fluid.
From the cooler, the fluid then flows through the fil-
ter and on to the vacuum unit.
A Sullair Vacuum System requires no
inspection and/or maintenance of its inter-
nal parts with the limits of the binding war-
ranty.

Section 2
DESCRIPTION
6
Figure 2-1A - Sullair VS-16 Screw Vacuum System - 30-40HP/22-30KW Air-cooled

Section 2
DESCRIPTION
7
Figure 2-1B - Sullair VS-16 Screw Vacuum System - 50HP/37KW Air-cooled

Section 2
DESCRIPTION
8
Figure 2-1C Sullair V-16 Screw Vacuum System 30-40HP/22-30KW Water-cooled

Section 2
DESCRIPTION
9
Figure 2-1D Sullair V-16 Screw Vacuum System 50HP/37KW Water-cooled

Section 2
DESCRIPTION
10
Figure 2-2A Vacuum Unit Cooling and Lubrication System-Air-cooled

Section 2
DESCRIPTION
11
Figure 2-2B Vacuum Unit Cooling and Lubrication System - Water-cooled

Section 2
DESCRIPTION
12
Figure 2-3 Vacuum Unit Discharge System

Section 2
DESCRIPTION
13
If equipped with option, the water-flow regulating
valve also conserves water during periods of vary-
ing load on the Vacuum System. The same valve
also shuts off the water supply when the vacuum
pump is shutdown.
On both air-cooled and water-cooled Vacuum
Systems, a portion of the fluid is routed to the anti-
friction bearings which supports the rotors inside
the vacuum unit. Prior to entering the vacuum unit,
the fluid is taken through the fluid filter, thus assur-
ing properly filtered lubricant for bearing supply and
rotor injection.
The fluid filter has a replacement element and an
integral pressure bypass valve. A gauge on the
instrument panel indicates when the filter needs
servicing.
The water-flow regulating valve also conserves
water during periods of varying load on the Vacuum
System. The same valve also shuts off the water
supply when the vacuum pump is shutdown.
A pressure switch located downstream of the fluid
filter will prevent the vacuum system from operating
if there is inadequate fluid pressure.
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 basic func-
tions:
1) It acts as the primary fluid separator.
2) It serves as the fluid sump.
3) It houses the final fluid separator element.
The compressed gas/fluid mixture enters the sump
and is directed against the side of the tank. Its direc-
tion of movement is changed and its velocity signif-
icantly reduced, causing the larger droplets of fluid
to fall to the bottom of the sump. The fractional per-
centage of fluid remaining in the compressed gas
collects on the surface of the separator element as
the compressed gas flows through the separator. A
return line(s) (or scavenge tube) leads from the
bottom of the separator element(s) to the inlet
region of the vacuum unit. Fluid collecting on the
bottom of the separator(s) is returned to the vacu-
um unit by the pressure difference between the
receiver and the vacuum unit inlet. Sight glasses
are located in the return line(s) for the observance
of this fluid flow. A gauge located on top of the con-
trol box, indicates abnormal pressure drop through
the separator element(s). At this time, separator
element replacement is necessary.
All Sullair Vacuum Systems are equipped with a
high pressure shutdown switch to shut down the
vacuum system at 12 psig (83kPa). A temperature
switch will shut the vacuum system down if the dis-
charge temperature reaches 240ºF (115ºC).
A rupture disk will open if the sump pressure reach-
es 15 psig (103kPa).
Fluid is added to the sump via a capped fluid filler
opening, placed low on the tank to prevent overfill-
ing the sump. A sight glass enables the operator to
visually monitor the sump fluid level.
2.6 CONTROL SYSTEM, FUNCTIONAL DESCRIP-
TION
Refer to Figure 2-4. The purpose of the RSVS con-
trol system is to regulate the vacuum unit gas intake
to match the amount of gas being introduced into
the Vacuum System. At 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).
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
DO NOT remove caps, plugs, or other
components when vacuum system is run-
ning.
The functional description of the Control
System is described below in four distinct
phases of Vacuum System operation. The
following descriptive text applies to all
VS-16 Series machines. It applies 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 except for the stated vacu-
ums.

Section 2
DESCRIPTION
14
butterfly 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 opened and gas
is drawn from the system at full capacity of the vac-
uum pump. From this point on, the system vacuum
is continually monitored by a vacuum gauge. The
vacuum regulator remains closed during this phase,
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; reducing 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- ABOVE 23 IN.-HG. (584MM)
For a machine with varied periods of time when
there is not 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. (585mm), the switch contacts open which
de-engergizes 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, the machine will
automatically restart.
2.7 INLET SYSTEM, FUNCTIONAL DESCRIPTION
The RSVS inlet system consists of a dry-type
inlet filter, a check valve and an inlet butterfly
valve.
The butterfly-type inlet valve directly controls the
Figure 2-4 Control System
KEY NO. DESCRIPTION QTY
1VACUUM REGULATOR VALVE 1
2SULLICON CONTROL 1
3 ORIFICE 1
4CHECK VALVE 1
5VACUUM PUMP 1
START
FULL LOAD
MODULATION