Quincy Compressor QSI Series User manual

QSI®Series
Industrial Rotary Screw Air Compressors
Instruction Manual
This manual contains important safety information and should be made available to
all personnel who operate and/or maintain this product. Carefully read this manual
before attempting to operate or perform maintenance on this equipment.
Manual No. 65005-CB
April 2001 Edition
Update: September 2010

Table of Contents
Quincy Compressor-QSI®
Section I - General
Standard Warranty...................................................................................................................................................... 1
Safety Alert Symbols ................................................................................................................................................. 2
Safety Precautions ...................................................................................................................................................... 3
Spare Parts Ordering Information .............................................................................................................................. 4
Serial/Model Identification Plate ............................................................................................................................... 4
Model Identification ................................................................................................................................................... 5
Section II - Description
General Description.................................................................................................................................................... 6
The Compression Cycle ............................................................................................................................................. 6
Air Flow ..................................................................................................................................................................... 7
Cooling System .......................................................................................................................................................... 7
Capacity Control System .........................................................................................................................................8-9
Electrical System ...................................................................................................................................................... 10
Indicators .................................................................................................................................................................. 11
Gauges ...................................................................................................................................................................... 11
Section III - Installation
Receiving .................................................................................................................................................................. 12
Moving the Unit to the Installation Site ................................................................................................................... 12
Location.................................................................................................................................................................... 13
Piping Connections .................................................................................................................................................. 13
Relief Valves ............................................................................................................................................................ 14
Electrical................................................................................................................................................................... 14
Guards ...................................................................................................................................................................... 14
Manual Vent and Shutoff Valves ............................................................................................................................. 15
Water and Sewer Facilities at the Installation Site ................................................................................................... 15
Compressor Rotation ................................................................................................................................................ 15
Fan Rotation ............................................................................................................................................................. 15
Section IV - Operating Procedures
Prior To Starting ....................................................................................................................................................... 16
Starting the Compressor ........................................................................................................................................... 16
Stopping the Compressor - Normal Operation......................................................................................................... 17
Stopping the Compressor - Emergency Operation .................................................................................................. 17
Section V - Maintenance or Service Preparation
Maintenance or Service Preparation ........................................................................................................................ 18
Section VI - Servicing
Safety ........................................................................................................................................................................ 20
Water Removal ......................................................................................................................................................... 20
Air/Fluid Separator Element .............................................................................................................................. 20-21
Fluid Scavenging System ......................................................................................................................................... 22

Table of Contents
Quincy Compressor-QSI®
Section VI - Servicing (continued)
Control Line Air Filter ............................................................................................................................................. 22
Shaft Seal............................................................................................................................................................ 23-24
Air and Fluid Tubing................................................................................................................................................ 24
O-ring Fittings .......................................................................................................................................................... 25
Section VII - Compressor Fluids
Fluid Specifications.................................................................................................................................................. 26
Lubrication ............................................................................................................................................................... 27
Fluid Level ............................................................................................................................................................... 27
Fluid Sample Valve .................................................................................................................................................. 28
Fluid Filter ................................................................................................................................................................ 28
Factors Affecting Fluid Life..................................................................................................................................... 29
Fluid Analysis Program - General............................................................................................................................ 29
QuinSyn PG.............................................................................................................................................................. 30
QuinSyn XP.............................................................................................................................................................. 31
QuinSyn Plus............................................................................................................................................................ 32
QuinSyn Fluids......................................................................................................................................................... 33
QuinSyn Flush (changed 02/04) ............................................................................................................................. 34
Cleaning and Flushing With QuinSyn Flush ............................................................................................................ 35
Converting to QuinSyn PG ....................................................................................................................................... 36
Converting to QuinSyn XP ....................................................................................................................................... 37
Converting to QuinSyn Plus ..................................................................................................................................... 37
Converting to QuinSyn............................................................................................................................................. 38
Sampling Procedures ................................................................................................................................................ 39
Analysis Report (sample) ......................................................................................................................................... 40
Understanding the Analysis Report ......................................................................................................................... 41
FluidParameters ...................................................................................................................................................42-43
Section VIII - Service Adjustments
Differential Pilot Valve ............................................................................................................................................ 44
Pressure Switch ........................................................................................................................................................ 44
Water Temperature Regulating Valve (Water-cooled Units Only) ......................................................................... 44
Drive Coupling Alignment................................................................................................................................. 45-47
Section IX - Troubleshooting
Troubleshooting ................................................................................................................................................. 48-57
Section X - Maintenance Schedule
Maintenance Schedule ............................................................................................................................................. 58
Appendix A - Dimensional Drawings
Dimensional Drawings ....................................................................................................................................... 60-75
Appendix B - Technical Data
Technical Data ......................................................................................................................................................76-84
Addendum 1 - QSI Logo Controller
PLC Logo ControllerAddendum (added 03/04) ..................................................................................................85-86
Addendum 2 - Shell /Tube Heat Exchanger Install and Service Recommendations (added 09/10)........................................................87-88

Section I - General
Quincy Compressor-QSI®1
Royal Blue Warranty
Drive Coupling Elements - Five years (60 months)
from date of start up (not to exceed 66 months
from date of shipment), including parts and labor.
(Machine must be installed and operated in
accordance with the Operator’s Manual.)
Variable Speed Drives (if applicable) - Five years
(60 months) from date of start up (not to exceed
66 months from date of shipment), including parts
& labor for the first year (12 months), parts only for
the remainder of the warranty period. Unit must be
installed indoors in a well ventilated environment &
a line reactor purchase (from Quincy Compressor) is
required.
Remanufactured Airend - Twelve (12) months from
date of shipment from the factory.
Parts - Ninety (90) days from date of Distributor sale
or one (1) year from date of factory shipment.
With respect to products not manufactured by
Seller, Seller will, if practical, pass along the
warranty of the original manufacturer.
The terms of coverage for the Royal Blue Warranty
are listed below. Failure to follow the terms will
invalidate the Royal Blue Warranty.
AUTHORIZED START-UP REQUIRED:
A properly completed start-up report and the Royal
Blue Warranty registration form must be submitted
by an authorized Quincy distributor to the Quincy
Compressor Bay Minette office within thirty (30)
days of start-up. Start-up reports must be submitted
on Q-Serv.
GENUINE PARTS AND FLUIDS
The compressor must be maintained with
QuinSyn-PG (8,000 hours maximum), QuinSyn-
XP (12,000 hours maximum), QuinSyn-Plus (8,000
hours maximum) or QuinSyn-F fluid (4,000 hours
maximum). Maximum fluid change intervals are
noted per fluid. Actual fluid change interval is to be
determined by fluid sampling report, not to exceed
maximum fluid change interval. Fluid samples must
be taken every 2,000 hours or as directed by the
analysis report.
Seller warrants products of its own manufacture
against defects in workmanship and materials under
normal use and service, as follows:
Packaged Compressors - Twelve (12) months from
date of start-up or eighteen (18) months from date
of shipment from the factory, whichever occurs first.
Airend on Packaged Compressors (for service
at full-load pressure at or below 150 psig) - Ten
years (120 months) from date of startup (not to
exceed 126 months from date of shipment from the
factory).
Airend on Packaged Compressors (for service at
full-load pressure above 150 psig) - Twelve (12)
months from date of start-up or twenty-four (24)
months from date of shipment from the factory,
whichever occurs first. Five (5) and ten (10) year
Extended Airend Warranties are available on 150
psig full-load pressure airends.
Air/fluid Reservoir Tanks - Five years (60 months)
from date of start up (not to exceed 66 months
from date of shipment), including parts and labor.
In the event of a reservoir tank failure, the parts and
labor coverage is limited to the reservoir tank itself
and does not cover the separator element(s) or loss
of fluid.
Air and Fluid Heat Exchangers - Five years (60
months) from date of start up (not to exceed 66
months from date of shipment), including parts and
labor for the first twelve (12) months, parts only
after twelve (12) months. In the event of a heat
exchanger failure, the parts and labor coverage is
limited to the heat exchanger itself and does not
cover the loss of fluid.
Drive Motors - Five years (60 months) from date
of start up (not to exceed 66 months from date of
shipment), including parts and labor. Royal Blue
warranty does not cover medium voltage (above
575 volt, 3 phase) or customer specified motors.
Before any motor repairs or replacements are
performed, the factory must be contacted at the
time of failure in order to approve any further
action.
Updated Warranty 10/01/2008.

Section I - General
1A Quincy Compressor-QSI®
Royal Blue Warranty (continued)
Seller’s sole obligation on this warranty shall be, at
its option, to repair, replace or refund the purchase
price of any product or part thereof which proves to
be defective. If requested by Seller, such product
or part thereof must be promptly returned to Seller,
freight collect for inspection.
Seller warrants factory repaired or replaced parts of
its own manufacture against defects in material and
workmanship under normal use and service for ninety
(90) days or for the remainder of the warranty on the
product being repaired, whichever is longer.
This warranty shall not apply and Seller shall not be
responsible nor liable for:
a) Consequential, collateral or special losses or
damages;
b) Equipment conditions caused by fair wear and
tear, abnormal conditions of use, accident,
neglect or misuse of equipment, improper stor-
age or damages resulting during shipment;
c) Deviation from operating instructions, specifi-
cations, or other special terms of sales;
d) Labor charges, loss or damage resulting from
improper operation, maintenance or repairs
made by person(s) other than Seller or Seller’s
authorized service station.
e) Improper application of product.
In no event shall Seller be liable for any claims,
whether arising from breach of contract or warranty
of claims of negligence or negligent manufacture, in
excess of the purchase price.
Only genuine Quincy Compressor maintenance and
replacement parts may be used on the compressor.
Normal rules of warranty apply regardless of coverage
length. Inlet valves, fluid pumps and shaft seals are
covered by the standard (1 year) warranty terms and
are not included in the Royal Blue Warranty program.
The Royal Blue Warranty is non-transferable.
The customer and/or Quincy Distributor must keep
copies of all maintenance records, parts purchases
and sampling reports. The following records will be
required for warranty airend replacement and/or
warranty claim consideration and should be submitted
to the Quincy Compressor Customer Service
Department:
ØA completed Airend Failure Information form.
ØA copy of the Royal Blue Warranty Registration/
Agreement form.
ØCopies of all maintenance logs for the unit.
ØProof of purchase of genuine Quincy parts and
fluids.
ØCopies of all fluid analysis reports.
Notice of the alleged defect must be given to Seller
in writing with all identifying details including serial
number, model number, type of equipment and date
of purchase, within thirty (30) days of the discovery of
same during the warranty period.
NOTICE!
Quincy Compressor reserves the right to modify or withdraw this Royal Blue Warranty program at any
time on units not already covered by this ROYAL BLUE WARRANTY program.
Updated Warranty 10/01/2008.

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Section I - General
2Quincy Compressor-QSI®
• Safety Alert Symbols
• Safety Precautions
• Spare Parts Ordering Information
• Serial/Model Identification Plate
• Model Identification
Safety Alert Symbols
WARNING!
This symbol identifies hazards or unsafe practices
which could result in personal injury, death or
substantial property damage.
CAUTION!
Identifies hazards or unsafe practices which could
result in minor personal injury or property
damage.
NOTICE!
Identifies important installation, operation or
maintenance information which is not hazard
related.
IMPORTANT!
Throughout this manual we have identified key hazards. The following symbols identify the level of hazard
seriousness:
DANGER!
This symbol identifies immediate hazards which
will result in severe personal injury, death or
substantial property damage.
DANGER!
This symbol identifies life threatening electrical
voltage levels which will result in severe personal
injury or death. All electrical work must be
performed by a qualified electrician.
CAUTION!
This symbol identifies hot surfaces which could
result in personal injury or property damage.
DANGER!
Air from this compressor will cause severe injury or death if used for
breathing or food processing. Air used for these processes must meet
OSHA29CFR1910 OR FDA21XDE178.3570 regulations.

Section I - General
Quincy Compressor-QSI®3
Safety Precautions
Read this manual and follow all instructions prior to
installing or operating this compressor.
Listed below are some, but not all, safety precautions that
must be observed with compressors and compressed air
systems.
WARNING!
Failure to follow any of these precautions may
result in severe personal injury, death, property
damage and/or compressor damage.
• Air from this compressor will cause severe injury or
death if used for breathing or food processing. Air
used for these processes must meet OSHA 29 CFR
1910.134 regulations.
• Disconnect and lockout all power supplies to the
compressor plus any remote controllers prior to
servicing the unit.
• Never assume it is safe to work on the compressor
because it is not operating. Many installations have
automatic start/stop controls and the compressor may
start at any time.
• This compressor is designed for use in the
compression of normal atmospheric air only. No
other gases, vapors or fumes should be exposed to
the compressor intake, nor processed through the
compressor.
• Relieve all pressure internal to the compressor prior
to servicing. Do not depend on check valves to hold
system pressure.
• A properly sized pressure relief valve must be
installed in the discharge piping ahead (upstream) of
any shut-off valve (block valve), heat exchanger,
orifice or any potential blockage point. Failure to
install a pressure relief valve could result in the
rupturing or explosion of some compressor
component.
• Do not change the pressure setting of the pressure
relief valve, restrict the function of the pressure relief
valve, or replace the pressure relief valve with a
plug. Over pressurization of system or compressor
components can occur, resulting in death, severe
personal injury or property damage.
• Never use plastic pipe, rubber hose, or soldered
joints in any part of the compressed air system.
Failure to ensure system compatibility with
compressor piping is dangerous.
• Never use a flammable or toxic solvent for cleaning
the air filter or any parts.
• Do not remove any guards or cabinet panels or
attempt to service any compressor part while the
compressor is operating.
• Do not operate the compressor at pressures in excess
of its rating.
• Observe control panel displays daily to ensure
compressor is operating properly.
• Follow all maintenance procedures and check all
safety devices on schedule.
• Never disconnect or tamper with the high air
temperature (HAT) sensors.
• Compressed air is dangerous, do not play with it.
• Use the correct fluid at all times.
• Do not rely on the discharge air line check valve.
• Do not override any safety or shutdown devices.
• Keep doors closed during operation. The noise level
inside cabinet exceeds 100 decibels (dBA) and the
operating temperature of some components is
sufficient to burn the skin.
NOTICE!
These instructions, precautions and descriptions
cover standard Quincy manufactured QSI®Series
air compressors. As a service to our customers,
we often modify or construct packages to the
customers specifications. This manual may not
be appropriate in those cases.

Section I - General
4Quincy Compressor-QSI®
NOTICE!
Every effort has been taken to ensure complete
and correct instructions have been included in this
manual, however, possible product updates and
changes may have occurred since this printing.
Quincy Compressor reserves the right to change
specifications without incurring any obligation for
equipment previously or subsequently sold. Not
responsible for typographical errors.
Spare Parts Ordering Information
BFGoodrich, Quincy Compressor Division maintains
replacement parts for Quincy compressors. A repair parts
list is shipped with all new machines. Order parts from
your Authorized Quincy distributor. Use only genuine
Quincy replacement parts. Failure to do so may void
warranty.
Serial/Model Identification Plate
Reference to the machine MODEL, SERIAL NUMBER
and DATE OF ORIGINAL START-UP must be made in
all communication relative to parts orders or warranty
claim. A model/serial number plate is located on the
frame or in the upper right corner of the control panel
door.

Section I - General
Quincy Compressor-QSI®5
MODEL IDENTIFICATION

Section II - Description
6Quincy Compressor-QSI®
• General Description
• The Compression Cycle
• Air Flow
• Cooling System
• Capacity Control System
• Electrical System
• Indicators
• Gauges
General Description
QSI compressors are single stage, positive displacement,
fluid-flooded rotary screw type compressors containing
two precision-machined rotors. A motor directly drives
the male rotor through a flexible drop out type coupling
with no step up or step down gearing used. The male
rotor has four lobes that mesh with a female rotor
consisting of six flutes. Both rotors are housed in a
single cast iron cylinder. The unit has an inlet port at the
power input end and a discharge port at the opposite end.
Most models are equipped with a positive displacement
fluid pump mounted to the compressor to circulate fluid
through the system. Models without a fluid pump use
positive pressure in the reservoir to circulate the fluid.
All components are attached to a heavy-duty steel frame.
Controls and indicators are arranged on a control panel.
Acoustical cabinets are available to reduce sound levels.
Figure 2-1. Compression Cycle
A) INTAKE B) COMPRESSION C) DISCHARGE
INLET PORT CYLINDER
MALE
ROTOR
FEMALE ROTOR DISCHARGE PORT
The Compression Cycle
The compression cycle of a rotary compressor is a
continuous process from intake to discharge with no
reciprocating mechanisms starting and stopping as found
in reciprocating compressors. The compressor consists
of two rotors in constant mesh, housed in a cylinder with
two parallel adjoining bores. The male drive rotor has
four lobes that mesh with six flutes in the female rotor.
All parts are machined to exacting tolerances.
As the rotors rotate, (male-clockwise as viewed from the
power input end) air is drawn into the cylinder through
the inlet port located at the power input end. A volume
of air is trapped as the rotor lobes pass the inlet cut off
points in the cylinders. Compression occurs as the male
rotor rolls into the female flute, progressively reducing
the space thereby raising the pressure. Compression
continues until the lobe and flute pass the discharge port.
The compressed air is then discharged into the air/fluid
reservoir. There are four complete compression cycles
for each complete rotation of the male rotor.

Section II - Description
Quincy Compressor-QSI®7
Air Flow
With the compressor operating, a partial vacuum is
produced at the compressor inlet. Air entering via the
compressor air filter flows through the air inlet valve into
the rotor housing where it is compressed, then discharged
into the air/fluid reservoir. Compressed air passes
through the complete system then through a minimum
pressure check valve to the service connection.
Cooling System
Fluid Coolers
Fluid coolers may use either air or water as a cooling
medium. The following descriptions point out the major
differences between the two types of coolers.
Air-cooled Fluid Coolers
The air-cooled fluid cooler and aftercooler are of the
finned aluminum tube, one piece design. Ambient air is
forced through the fins by a motor driven fan, cooling the
fluid and air in the tubes. To maintain proper compressor
operation, the ambient air temperature should not exceed
the temperatures listed in Appendix B - Technical Data.
The cooler fins must be kept clean at all times. Fluid
leaving the receiver passes through a thermal mixing
valve before traveling on to the cooler. The purpose of
the thermal valve is to maintain a minimum fluid
discharge temperature at the compressor of
approximately 180°F.
Water-cooled Fluid Coolers
Water-cooled fluid coolers are of the shell and tube
design. Fluid passes through the shell transferring its
heat to the water flowing through the tubes. Fluid
leaving the cooler does not pass through a thermal
mixing valve as in an air-cooled unit, but goes directly to
the fluid filter and the compressor. Fluid discharge
temperature at the compressor is maintained by a water
temperature regulating valve located in the discharge
water line. The water temperature regulating valve uses a
probe to sense fluid temperature and opens and closes,
governing water flow through the cooler.
Aftercoolers
Aftercoolers reduce the amount of water in the discharge
air. They are used to lower the temperature of the
discharge air thereby condensing water vapor from the
compressed air. This allows most of the contained water
to be trapped and expelled from the unit, reducing water
related problems downstream.
Air-cooled aftercoolers are part of the air-cooled fluid
cooler. Cooling air from the fan is blown through the
aftercooler and the fluid cooler.
Water-cooled aftercoolers are placed in series with the
fluid cooler. Incoming water is first directed through the
aftercooler and then on to the fluid cooler.
A combination moisture separator and water trap is
provided for collecting and expelling water to the
customer’s drain.

Section II - Description
8Quincy Compressor-QSI®
Capacity Control System
As the motor starts driving the compressor rotors, air is
drawn in, compressed and discharged into the air/fluid
reservoir. When the air pressure in the air/fluid reservoir
exceeds the set point of the pilot valve (normally 110
PSIG), the valve opens and passes a controlled volume of
air to the inlet valve air cylinder.
NOTICE!
Other pressures are available optionally.
The air forces a piston to move within the cylinder,
closing the inlet valve. The compressor will continue to
run, matching air demand with air delivery by constantly
adjusting the position of the inlet valve. The inlet valve
regulates compressor capacity between 100% and nearly
0% of rated delivery.
When maximum pressure (typically 10 PSIG above
normal full load pressure) has been obtained in the air
system, complete compressor unloading occurs. The
pressure switch located in the control panel sends a signal
to the control and the solenoid valve opens, venting the
residual pressure from the blowdown valve. At the same
time, control air from the reservoir check valve is
directed through the solenoid to the inlet valve air
cylinder. The inlet valve is held in a closed position
preventing the intake of air into the compressor and
serving as a check valve preventing reverse air/fluid flow
through the inlet valve and air filter.
Auto/Dual (Standard)
The Auto/Dual system offers two choices of controlling
the Quincy QSI Compressor. With the selector switch in
the Continuous Run position, the compressor operates
continuously, matching air demand as the differential
pilot valve controls the position of the inlet valve. When
maximum system pressure is reached, the pressure switch
opens, venting the air/fluid reservoir and, although the
compressor continues to run unloaded, no air is
compressed.
When the Auto Dual mode is selected, the compressor
will also perform as above; however, a solid state timer is
activated when the pressure switch contacts open. This
timer is adjustable within a ten (10) minute range. When
the timer reaches the end of its delay period, the
compressor will automatically shut down and assume a
“standby” mode. Upon a drop in system air pressure, the
pressure switch contacts close, restarting the compressor
automatically. The timer should be set, during unit start-
up, for a minimum of six (6) minutes.
During the unloaded/timing mode, if plant pressure
should drop causing the pressure switch contacts to close,
the compressor will continue to operate, resetting the
timer and instructing the inlet valve to reopen.

Section II - Description
Quincy Compressor-QSI®9
Auto/Demand (Optional)
The QSI compressor with Auto/Demand controls
accommodates external control signals from an optional
Quincy Demand-A-Matic multiple compressor controller.
With the selector switch in the Local mode, the
compressor will operate exactly as described in the
previously mentioned Auto Dual description.
In the Remote mode, the compressor’s control panel is
bypassed in favor of the Demand-A-Matic multiple
compressor controller. The compressor will start, build
air, unload and shutdown on time delay as determined by
the Demand-A-Matic controller. With slight
modifications, a compressor equipped with Auto Dual
controls may be converted to Auto/Demand control.
Contact your authorized Quincy Distributor.
Lead/Lag (Optional, two machines only)
This option allows one of two different pressure control
settings to be chosen for a given machine. If the demand
is greater than one unit’s capability, the second
compressor will automatically turn itself on until the
excess demand has been satisfied. Again, working with
the standard Auto-Dual control, the second machine
would time out and turn itself off after the demand
dropped.
Load/No Load (Optional)
In the Load/No Load mode, the compressor does not
modulate the inlet valve. The valve is either fully open
or it is closed. If systems demands include regular
periods of air usage at less than full load, a large
compressed air storage capability is required with this
type of control. Without adequate storage, rapid cycling
may occur. This will cause wide system pressure
fluctuations that may affect the performance of
equipment using the compressed air. Load/No Load
works with Auto-Dual control to turn the compressor off
during extended periods of no demand.
WARNING!
Never assume it is safe to work on a compressor
because it is not operating. It may be in standby
mode and could restart at any time. Follow all
safety instructions in the “Preparing for
Maintenance or Service” chapter.

Section II - Description
10 Quincy Compressor-QSI®
Electrical System
A diagram of the electrical system is shown in the parts
manual sent with the compressor. A wiring diagram is
also included in the control panel on all Quincy QSI
compressors.
NOTICE!
Due to continuing product improvements and
updates, it is suggested that the wiring diagram
included in the control panel be used when
servicing the electrical control.
Standard drive motors are open drip proof 1800 RPM
with a maximum ambient temperature rating of 104°F.
They are not suitable for salt laden, corrosive, dirty, wet
or explosive environments.
The QSI series compressors utilize 460V incoming power
through an across-the-line magnetic starter. A
transformer in the control panel reduces this voltage to
120 VAC for the various controls on the unit. These
controls include the selector switch, pressure switch,
timer, high air temperature safety switches, solenoid and
the various indicator lights. Other incoming line voltages
are available as options. The compressor is provided
with a NEMA 1 enclosure. Optional panels include
NEMA 4.
Air-cooled models utilize a second magnetic starter for
protection of the fluid cooler fan motor. This starter is
connected to the compressor starter through an interlock
which insures the fan motor is operating with the
compressor motor. If the fan motor starter trips out for
any reason, the compressor unit will shut down.
DANGER!
High voltage could cause death or serious injury.
Disconnect all power supplies before opening the
electrical enclosure or servicing.
Safety Sensors
Two high air temperature (HAT) sensors are standard on
the QSI units. These sensors protect the unit by sensing
unusually high temperatures and shutting the unit down.
One is located in the discharge line from the compressor
to the air/ fluid reservoir. The second is located in the top
of the air/fluid reservoir. These sensors are set to trip at
approximately 225°F. The sensors are nonadjustable.
WARNING!
Never remove, bypass or tamper with the safety
HAT switch. Failure to provide this safety feature
could cause death or serious injury and property
damage. If the compressor is shutting down due
to high discharge temperature, contact a qualified
service technician immediately.

Section II - Description
Quincy Compressor-QSI®11
Indicators
Main Power on Light
Indicates when power from the main disconnect switch
has been turned on and there is live power at the
compressor starter and control panel. This light will
remain on as long as there is power to the unit, regardless
of the position of the selector switch.
CAUTION!
Always check power supply disconnect. The
Power-on light may be inoperable.
High Discharge Air Temperature Light
Indicates when the unit has sensed an unusually high
discharge temperature.
Fluid Filter Change Light
Indicates excessive pressure differential across the fluid
filter. It is used to determine fluid filter change intervals.
Air/Fluid Separator Element Differential Light
This indicates excessive pressure differential across the
air/fluid separator element. It is used to determine
separator element change intervals.
Air Intake Filter Service Light
This indicator signals when the filter element needs to be
cleaned or replaced.
Gauges
Hourmeter
This gauge indicates actual hours of operation.
Air Pressure Gauge
This gauge indicates air pressure available for
distribution to the service line.
CAUTION!
Gauge may not register when the unit is unloaded
or off. Make certain all air pressure is relieved
prior to servicing.
Air Outlet Temperature Gauge
This gauge indicates the temperature of the air/fluid
mixture as it discharges from the compressor. The
normal reading is 170-190°F.
Percent Capacity Gauge
This gauge is graduated in percent of the total capacity of
the unit. Readings taken from this gauge give an
indication of the amount of air being used.

Section III - Installation
12 Quincy Compressor-QSI®
• Receiving
• Moving the Unit to the Installation Site
• Location
• Piping Connections
• Relief Valves
• Electrical
• Guards
• Manual Vent and Shutoff Valves
• Water and Sewer Facilities at the Installation
Site (Water-cooled models only)
• Compressor Rotation
• Fan Rotation
Receiving
Upon receipt, immediately inspect the compressor for
any visible damage that may have occurred during
shipment. If visible damage is found, the delivering
carrier should make a notation on the freight bill and the
customer should request a damage report. If the
shipment is accepted and damage is found later, it is
classified as concealed damage. Concealed damage
should be reported to the delivering carrier within 15
days of delivery. The delivering carrier must prepare a
damage report. Itemized supporting papers are essential
to filing a claim.
Read the compressor nameplate to be sure the
compressor is the model and size ordered and that
optionally ordered items are included.
Check the reservoir and pressure relief valves to be sure
they are adequate for the pressure at which you intend to
operate.
Moving the Unit to the Installation Site
Forklift slots are provided in one side and one end of the
main frame. Use of chains and slings should be limited
to the main frame. Do not attempt to lift the unit by
attaching to any components. Optional lifting eyes are
available.
CAUTION!
Improper lifting may result in component, system
damage or personal injury. Follow good shop
practices and safety procedures when moving the
unit.

Section III - Installation
Quincy Compressor-QSI®13
Location
Locate the compressor on a level surface in a clean, well-
lit and well-ventilated area. Allow sufficient space (four
feet of clearance on all sides and top of the compressor)
for safe and proper daily inspection and maintenance.
The entire length of the frame base must be supported.
Shim where necessary but do not use wood.
Ambient temperature should not exceed 110°F. High
ambient temperatures may result in a high air temperature
shutdown. All models are intended for indoor
installation; however, it is possible, with certain
modifications, to accommodate some outdoor locations.
Cabinet models are water-resistant but not water tight.
Sheltering from rain, snow and freezing temperatures is
mandatory.
WARNING!
Do not operate in temperatures below 32°F or
above the limits outlined in Appendix B -
Technical Data.
Do not locate the unit where the hot exhaust air from
other compressors or heat generating equipment may be
drawn into the unit. Never restrict the flow of exhaust air
from the fluid cooler or cooling fan. Heated exhaust air
must be exhausted outside to prevent high temperature
conditions in the compressor room. If the room is not
properly ventilated, compressor operating temperatures
will increase and cause a high temperature shutdown.
CAUTION!
Clean, fresh air, of sufficient quantity, is required
for proper compressor operation.
In high humidity areas, avoid placing the compressor in a
basement or other damp locations. Control the
compressor temperatures and monitor compressor fluid
for signs of water contamination. Fluid and filter
changes may need to be increased in high humidity areas.
Increased operating temperatures may be required.
CAUTION!
Removal or modification of sound insulation
could result in dangerously high sound levels.
Quincy QSI compressors are essentially vibration free,
however, some customers may choose to bolt the unit to
the floor to prevent the accidental breakage of piping or
electrical connections as a result of being bumped. Use
only lag bolts to secure the unit. Do not pull the bolts
down tight. Overtightening the lag bolts may place the
frame in a twist or bind causing breakage of fluid coolers,
piping and reservoirs.
WARNING!
Under no circumstances should a compressor be
installed in an area exposed to a toxic, volatile or
corrosive atmosphere, nor should toxic, volatile
or corrosive agents be stored near the compressor.
Piping Connections
Never join pipes or fittings by soldering. Lead-tin
solders have low strength, a low creep limit, and may,
depending on the alloy, start melting at 360°F. Silver
soldering and hard soldering are forms of brazing and
should not be confused with lead-tin soldering. Never
use plastic, PVC, ABS pipe or rubber hose in a
compressed air system.
Piping Fit-up
Care must be taken to avoid assembling the piping in a
strain with the compressor. Piping should line up without
having to be sprung or twisted into position. Adequate
expansion loops or bends should be installed to prevent
undue stress at the compressor resulting from the changes
between hot and cold conditions. Pipe supports should
be mounted independently of the compressor and
anchored, as necessary, to limit vibration and prevent
expansion strains. Piping should never be of smaller size
than the connection on the compressor unit.

Section III - Installation
14 Quincy Compressor-QSI®
Relief Valves
Pressure relief valves are sized to protect the system.
Never change the pressure setting or tamper with the
valve. Only the relief valve manufacturer or an approved
representative is qualified to make such a change.
DANGER!
Relief valves are to protect system integrity in
accordance with ANSI/ASME B19 safety
standards. Failure to provide properly sized relief
valves will result in death or serious injury.
Relief valves are to be placed ahead of any potential
blockage point that includes, but is not limited to, such
components as shut-off valves, heat exchangers and
discharge silencers. Ideally, the relief valve should be
threaded directly into the pressure point it is sensing, not
connected with tubing or pipe and pointed away from any
personnel. Always direct discharge from relief valves to
a safe area away from personnel.
Figure 3-1. Relief Valve
CAUTION!
ASME coded pressure vessels must not be
modified, welded, repaired, reworked or
subjected to operating conditions outside the
nameplate ratings. Such actions will negate code
status, affect insurance status and may cause
death, serious injury and property damage.
Electrical
Before installation, the electrical supply should be
checked for adequate wire size and capacity. During
installation, a suitable fused disconnect switch or circuit
breaker should be provided. Any unreasonable voltage
unbalance (5%) between the legs must be eliminated and
any low voltage corrected to prevent excessive current
draw. The installation, electric motor, wiring and all
electrical controls must be in accordance with National
Electric Code, and all state and local codes. A qualified
electrician should perform all electrical work. Air
compressors must be grounded in accordance with
applicable codes. See control panel for the proper
wiring diagram.
Quincy would like to emphasize the importance of
providing adequate grounding for air compressors. The
common practice of grounding units to building
structural steel may not actually provide adequate
grounding protection, as paint and corrosion build-up
may exist.
CAUTION!
NEMA electrical enclosures and components
must be appropriate to the area in which they
are installed.
Pneumatic Circuit Breakers or Velocity Fuses
The Occupational Safety and Health Act, Section
1926.303 Paragraph 7 published in Code of Federal
Regulations 29 CFR 1920.1 (revised 07/01/1982), states
“all hoses exceeding 1/2” inside diameter shall have a
safety device at the source of supply or branch line to
reduce pressure in case of a hose failure.” These
pneumatic safety devices are designed to prevent hoses
from whipping, which could result in a serious or fatal
accident.
Guards
All mechanical action or motion is hazardous in varying
degrees and needs to be guarded. Guarding shall comply
with OSHA Safety and Health Standards 29 CFR
1910.219 in OSHA manual 2206 (revised 11/07/1978)
and any state or local codes.