Quincy Compressor QSI Series User manual
THIS PRODUCT CAN EXPOSE YOU TO CHEMICALS INCLUDING LEAD,
WHICH IS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER
AND BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM. FOR MORE
INFORMATION GO TO WWW.P65WARNINGS.CA.GOV
QSI Series
Fixed Speed 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. 2012203803
August 2018 Edition
Section I - General
Quincy Compressor-QSI®1
Seller warrants products of its own manufacture against
defects in workmanship and materials under normal use
and service, as follows:
QSI®Packaged Compressors - Twelve (12) months
from date of start-up or twenty-four (24) months from
Airend on Packaged Compressors - (for service at full-
load pressure at or below 150 psig) twenty-four (24)
months from date of start-up or from date of shipment
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
Remanufactured Airend - Twelve (12) months from
Parts - Ninety (90) days from date of Distributor sale or
With respect to products not manufactured by Seller,
Seller will, if practical, pass along the warranty of the
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
Standard Warranty
Quincy Compressor Division
Industrial Screw Products
QSI®- Rotary Screw Air Compressors
Seller’s sole obligation on this warranty shall be, at its
option, to repair, replace or refund the purchase price of
If requested by Seller, such product or part thereof must
be promptly returned to Seller, freight collect for inspec-
Seller warrants factory repaired or replaced parts of its
own manufacture against defects in material and work-
manship under normal use and service for ninety (90)
days or for the remainder of the warranty on the product
This warranty shall not apply and Seller shall not be
responsible nor liable for:
a) Consequential, collateral or special losses or dam-
ages;
b) Equipment conditions caused by fair wear and tear,
abnormal conditions of use, accident, neglect or
misuse of equipment, improper storage or damages
resulting during shipment;
-
tions, 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
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
NOTICE!
This warranty is the sole warranty of seller. Any other warranties, expressed or implied,
including any warranties of merchantability or tness for a particular use are hereby
excluded.
Section I - General
2 Quincy Compressor-QSI®
• Safety Alert Symbols
• Safety Precautions
• Spare Parts Ordering Information
• Serial/Model Identication Plate
• Model Identication
Safety Alert Symbols
WARNING!
This symbol identies 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!
Identies important installation, operation or
maintenance information which is not hazard
related.
IMPORTANT!
Throughout this manual we have identied key hazards. The following symbols identify the level of hazard
seriousness:
DANGER!
This symbol identies immediate hazards which
will result in severe personal injury, death or
substantial property damage.
DANGER!
This symbol identies life threatening electrical
voltage levels which will result in severe personal
injury or death. All electrical work must be per-
formed by a qualied electrician.
CAUTION!
This symbol identies 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
Listed below are some, but not all, safety precautions that
must be observed with compressors and compressed air
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
used for these processes must meet OSHA 29 CFR
• Disconnect and lockout all power supplies to the
compressor plus any remote controllers prior to ser-
• Never assume it is safe to work on the compressor
automatic start/stop controls and the compressor may
• This compressor is designed for use in the compres-
vapors or fumes should be exposed to the compressor
• Relieve all pressure internal to the compressor prior
• A properly sized pressure relief valve must be
installed in the discharge piping ahead (upstream) of
-
a pressure relief valve could result in the rupturing or
• Do not change the pressure setting of the pressure
relief valve, restrict the function of the pressure relief
Over pressurization of system or compressor compo-
nents can occur, resulting in death, severe personal
• Never use plastic pipe, rubber hose, or soldered
-
ure to ensure system compatibility with compressor
• Do not remove any guards or cabinet panels or
attempt to service any compressor part while the
• Do not operate the compressor at pressures in excess
• Observe control panel displays daily to ensure com-
• Follow all maintenance procedures and check all
• Never disconnect or tamper with the high air tem-
inside cabinet exceeds 100 decibels (dBA) and the
operating temperature of some components is suf-
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 specications. This manual may not
be appropriate in those cases.
NOTICE!
Every eort has been taken to ensure complete
and correct instructions have been included in this
Section I - General
4 Quincy Compressor-QSI®
manual, however, possible product updates and
changes may have occurred since this printing.
Quincy Compressor reserves the right to change
specications without incurring any obligation for
equipment previously or subsequently sold. Not
responsible for typographical errors.
Spare Parts Ordering Information
BFGoodrich, Quincy Compressor Division maintains
and DATE OF ORIGINAL START-UP must be made in
all communication relative to parts orders or warranty
frame or in the upper right corner of the control panel
Section I - General
Quincy Compressor-QSI®5
MODEL IDENTIFICATION
Section II - Description
6 Quincy 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,
-
tor has four lobes that mesh with a female rotor consisting
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
of two rotors in constant mesh, housed in a cylinder with
As the rotors rotate, (male-clockwise as viewed from the
power input end) air is drawn into the cylinder through
Section II - Description
Quincy Compressor-QSI®7
Air Flow
With the compressor operating, a partial vacuum is
the rotor housing where it is compressed, then discharged
through the complete system then through a minimum
Cooling System
Fluid Coolers
Fluid coolers may use either air or water as a cooling
Air-cooled Fluid Coolers
operation, the ambient air temperature should not exceed
leaving the receiver passes through a thermal mixing
-
charge temperature at the compressor of approximately
Water-cooled Fluid Coolers
-
cooler does not pass through a thermal mixing valve as
in an air-cooled unit, but goes directly to t
compressor is maintained by a water temperature regulat-
Aftercoolers
Aftercoolers reduce the amount of water in the dis-
discharge air thereby condensing water vapor from the
to be trapped and expelled from the unit, reducing water
Water-cooled aftercoolers are placed in series with the
A combination moisture separator and water trap is pro-
vided for collecting and expelling water to the customer’s
Section II - Description
8 Quincy Compressor-QSI®
Capacity Control System
As the motor starts driving the compressor rotors, air is
exceeds the set point of the pilot valve (normally 110
PSIG), the valve opens and passes a controlled volume of
NOTICE!
Other pressures are available optionally.
The air forces a piston to move within the cylinder,
run, matching air demand with air delivery by constantly
regulates compressor capacity between 100% and nearly
When maximum pressure (typically 10 PSIG above
normal full load pressure) has been obtained in the air
pressure switch located in the control panel sends a signal
to the control and the solenoid valve opens, venting the
time, control air from the reservoir check valve is directed
inlet valve is held in a closed position preventing the
intake of air into the compressor and serving as a check
Auto/Dual (Standard)
in the Continuous Run position, the compressor operates
maximum system pressure is reached, the pressure switch
compressor continues to run unloaded, no air is com-
When the Auto Dual mode is selected, the compressor
will also perform as above; however, a solid state timer is
the timer reaches the end of its delay period, the compres-
sor will automatically shut down and assume a “standby”
switch contacts close, restarting the compressor automati-
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
Section II - Description
Quincy Compressor-QSI®9
Auto/Demand (Optional)
The QSI compressor with Auto/Demand controls accom-
modates external control signals from an optional Quincy
With the selector switch in the Local mode, the compres-
sor will operate exactly as described in the previously
In the Remote mode, the compressor’s control panel
air, unload and shutdown on time delay as determined by
-
tions, a compressor equipped with Auto Dual controls
Lead/Lag (Optional, two machines only)
is greater than one unit’s capability, the second com-
pressor will automatically turn itself on until the excess
-
dard Auto-Dual control, the second machine would time
Load/No Load (Optional)
In the Load/No Load mode, the compressor does not
-
ods of air usage at less than full load, a large compressed
-
fect the performance of equipment using the compressed
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 Mainte-
nance or Service” chapter.
Section II - Description
10 Quincy Compressor-QSI®
Electrical System
A diagram of the electrical system is shown in the parts
is also included in the control panel on all Quincy QSI
NOTICE!
Due to continuing product improvements and
updates, it is suggested that the wiring diagram
included in the control panel be used when servic-
ing the electrical control.
They are not suitable for salt laden, corrosive, dirty, wet
The QSI series compressors utilize 460V incoming power
-
former in the control panel reduces this voltage to 120
include the selector switch, pressure switch, timer, high
air temperature safety switches, solenoid and the vari-
Air-cooled models utilize a second magnetic starter for
connected to the compressor starter through an interlock
which insures the fan motor is operating with the com-
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
One is located in the discharge line from the compressor
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 qualied
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 com-
on as long as there is power to the unit, regardless of the
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
Fluid Filter Change Light
Air/Fluid Separator Element Dierential Light
-
Air Intake Filter Service Light
Gauges
Hourmeter
Air Pressure Gauge
This gauge indicates air pressure available for distribution
CAUTION!
Gauge may not register when the unit is unloaded
or o. Make certain all air pressure is relieved
prior to servicing.
Air Outlet Temperature Gauge
-
Percent Capacity Gauge
This gauge is graduated in percent of the total capacity of
-
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 Shuto 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
If visible damage is found, the delivering carrier should
make a notation on the freight bill and the customer
-
-
-
Read the compressor nameplate to be sure the compressor
is the model and size ordered and that optionally ordered
Check the reservoir and pressure relief valves to be sure
they are adequate for the pressure at which you intend to
Moving the Unit to the Installation Site
Forklift slots are provided in one side and one end of the
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-
feet of clearance on all sides and top of the compressor)
ambient temperatures may result in a high air temperature
-
WARNING!
Do not operate in temperatures below 32°F or
above the limits outlined in Appendix B - Techni-
cal Data.
Do not locate the unit where the hot exhaust air from
other compressors or heat generating equipment may be
must be exhausted outside to prevent high temperature
properly ventilated, compressor operating temperatures
CAUTION!
Clean, fresh air, of sucient quantity, is required
for proper compressor operation.
In high humidity areas, avoid placing the compressor in a
-
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
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.
CAUTION!
ASME coded pressure vessels must not be modi-
ed, welded, repaired, reworked or subjected to
operating conditions outside the nameplate rat-
ings. Such actions will negate code status, aect
insurance status and may cause death, serious
injury and property damage.
Piping Connections
have low strength, a low creep limit, and may, depending
hard soldering are forms of brazing and should not be
Piping Fit-up
Care must be taken to avoid assembling the piping in a
Section III - Installation
14 Quincy Compressor-QSI®
expansion loops or bends should be installed to prevent
undue stress at the compressor resulting from the changes
mounted independently of the compressor and anchored,
as necessary, to limit vibration and prevent expansion
Relief Valves
Never change the pressure setting or tamper with the
DANGER!
Relief valves are to protect system integrity in ac-
cordance 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
threaded directly into the pressure point it is sensing, not
connected with tubing or pipe and pointed away from any
Figure 3-1. Relief Valve
Electrical
Before installation, the electrical supply should be
installation, a suitable fused disconnect switch or circuit
unbalance (5%) between the legs must be eliminated and
any low voltage corrected to prevent excessive current
electrical controls must be in accordance with National
-
Air
compressors must be grounded in accordance with
applicable codes. See control panel for the proper wir-
Quincy would like to emphasize the importance of
common practice of grounding units to building structural
steel may not actually provide adequate grounding pro-
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
“all hoses exceeding 1/2” inside diameter shall have a
safety device at the source of supply or branch line to re-
safety devices are designed to prevent hoses from whip-
Guards
All mechanical action or motion is hazardous in vary-
comply with OSHA Safety and Health Standards 29 CFR
Section III - Installation
Quincy Compressor-QSI®15
Install a manual valve to vent the compressor and the
receiver tank services a single compressor, the manual
should be installed upstream from the valve, and a pres-
sure relief valve installed upstream from the manual vent
valve (block valve) if the purpose is to isolate the com-
WARNING!
Removal or painting over safety labels will result
in uninformed conditions. This could result in
personal injury or property damage. Warning
signs and labels shall be provided with enough
light to read, conspicuously located and main-
tained for legibility. Do not remove any warning,
caution or instructional material attached.
Water and Sewer Facilities at the Installation Site
(Water-cooled models only)
-
ing supplied by the user should be at least equal to the
should be readily accessible to the installation site and
meet all the requirements of local sewer codes, plus those
NOTICE!
The water temperature regulating valve is located
in the discharge water line.
Always select a source providing the cleanest air pos-
at least as large as the inlet valve opening and increased
WARNING!
Relieve compressor and system air pressure by
opening the appropriate manual relief valve
prior to servicing. Failure to relieve all system
pressure could result in death or serious injury
and property damage.
Compressor Rotation
Proper rotation is clockwise (as viewed from the power-
-
ating the compressor in incorrect rotation will result in
extreme damage to the compressor and warranty cover-
starter button, allowing the motor to turn 2 or 3 revolu-
If incorrect rotation is observed, lock out power supply,
reverse electrical leads L1and L3
Fan Rotation (Air-cooled only)
Check the fan rotation at the same time the compressor
Section IV - Operating Procedures
• Prior to Starting
• Starting the Compressor
• Control panel
• Icon used
• Main screen
• Calling up menus
• Inputs menu
• Outputs menu
• Counters
• Service menu
• Setpoint menu
• Event history menu
• Modifying general settings
• Info menu
• Week timer menu
• User password menu
• Power$ync control mode
Prior to Starting
CAUTION!
Provisions should be made to have the instruc-
tion manual readily available to the operator
and maintenance personnel. If, for any reason,
any parts of the manual become illegible or if the
manual is lost, have it replaced immediately. The
instruction manual should be read periodically
to refresh one’s memory. This may prevent a
serious accident.
Before starting the compressor, review Sections II and
-
ments have been met and that the purpose and use of the
compressor into operation, do the following:
•Remove all loose items and tools from around the
• -
•
•
revolutions to be certain there are no mechanical
•
•
•Check to make sure all panels and guards are in place
•Check fuses, circuit breakers and thermal overloads
•Close the main power disconnect switch and jog the
starter switch button to check the rotational direction
• -
•Water-cooled models - Check inlet and discharge
16 Quincy Compressor-QSI®
Section IV - Operating Procedures
Starting the Compressor
•
•Open the service valve to the plant air distribution
•Select the mode of operation and start the compres-
•Watch for excessive vibration, unusual noises or air/
•Control settings have been adjusted at the factory;
however, they should be checked during start-up
-
Never increase air pressure settings beyond factory
•
hour of operation and frequently for the next seven
Stopping the Compressor
Normal Operation
Close the service valve to the plant air distribution sys-
NOTICE!
Close the service valve when the compressor is
not being used to prevent the system’s air pres-
sure from leaking back into the compressor if the
check valve leaks or fails.
Emergency
Press the emergency stop button or cut the power at the
Quincy Compressor-QSI®17
Section IV - Operating Procedures
18 Quincy Compressor-QSI®
Control panel
Parts and functions
Reference Designation Function
1 Display Shows the compressor operating condition and a number of
2 Service LED Lights up if service is needed
3 General alarm LED Flashes if a shut-down warning condition exists
4 Pictograph General alarm
5 Pictograph Service
6 Pictograph Automatic operation
7 Automatic operation LED Indicates that the regulator is automatically controlling the
8 Voltage on LED
9 Pictograph Voltage on
10 Enter key
Only the parameters followed by an arrow pointing to the
11 Back key To go to previous screen or to end the current action
12 Scroll keys
13 Stop button
14 Start button
1234
5
6
7
13
14 12
8
9
11
10
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