Quincy QGV-100 User manual

QGV Series
Variable Speed Drive 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. 65077-1A
March 2006 Edition
Latest Update: November 2008

Table of Contents
Section I - General Information
Safety Alert Symbols ...........................................................................................................1
Spare Parts Ordering Information .......................................................................................2
Serial/Model Identification Plate .........................................................................................2
Royal Blue Warranty ............................................................................................................3
Section II - Description
General Description ............................................................................................................6
The Compression Cycle ......................................................................................................7
Air Flow ...............................................................................................................................7
Capacity Control System.....................................................................................................7
Cooling System ...................................................................................................................8
Fluid Coolers..................................................................................................................8
Air-cooled Fluid Coolers ................................................................................................8
Water-cooled Fluid Coolers...........................................................................................8
Aftercoolers....................................................................................................................8
Electrical System..................................................................................................................9
Safety Sensors................................................................................................................9
Control Panel.....................................................................................................................10
Section III - Installation
Receiving ...........................................................................................................................12
Moving the Unit to the Installation Site.............................................................................12
Location.............................................................................................................................13
Piping Connections ...........................................................................................................14
Piping Fit-up ................................................................................................................14
Relief Valves ......................................................................................................................14
Electrical ............................................................................................................................15
Pneumatic Circuit Breakers or Velocity Fuses ..............................................................15
Guards...............................................................................................................................15
Manual Vent and Shutoff Valve .........................................................................................15
Water and Sewer Facilities at the Installation Site (water-cooled models)........................16
Compressor Rotation ........................................................................................................17
Fan Rotation (air-cooled only) ...........................................................................................17
Section IV - Operating Procedures
Prior to Starting .................................................................................................................18
Starting the Compressor ...................................................................................................19
Control Panel Operation ...................................................................................................20
Drive Status..................................................................................................................20
Menu Selections...........................................................................................................21
Stopping the Compressor - Normal Operation ...............................................................29
Stopping the Compressor - Emergency............................................................................29
Quincy Compressor-QGV Series

Table of Contents
Section V - Servicing
Preparing for Maintenance or Service...............................................................................30
Maintenance Schedule (updated 11/08) ...........................................................................31
Safety ................................................................................................................................32
Water Removal ..................................................................................................................32
Service Adjustments..........................................................................................................33
Compressor Fluid ..............................................................................................................34
Fluid Filter .........................................................................................................................34
Fluid Level .........................................................................................................................35
Fluid Scavenging System ..................................................................................................36
Fluid Cooler/Aftercooler (air-cooled) ................................................................................36
Fluid Tubing ......................................................................................................................36
Air Filter.............................................................................................................................38
Air/Fluid Separator Element..............................................................................................38
Continuity Testing of Separator Elements ...................................................................38
QGV-150/200 Separator Installation .................................................................................39
Replacing Sensors or Transducers.....................................................................................40
Control Panel Fault or Service Messages ..........................................................................40
Replacing the Control Panel..............................................................................................41
Shaft Seal...........................................................................................................................42
Section VI - Compressor Fluids
Fluid Specifications............................................................................................................44
Lubrication.........................................................................................................................45
Fluid Sample Valve............................................................................................................45
Factors Affecting Fluid Life................................................................................................46
Fluid Analysis Program - General ......................................................................................46
Understanding the Analysis Report...................................................................................48
QuinSyn-Plus .....................................................................................................................50
QuinSyn-XP .......................................................................................................................51
QuinSyn-PG.......................................................................................................................52
QuinSyn-F..........................................................................................................................53
QuinSyn Flush....................................................................................................................53
Cleaning and Flushing with QuinSyn Flush .......................................................................54
Converting to QuinSyn-Plus ..............................................................................................56
Converting to QuinSyn-XP ................................................................................................56
Converting to QuinSyn-PG ...............................................................................................57
Converting to QuinSyn-F...................................................................................................57
Fluid Parameters................................................................................................................58
Quincy Compressor-QGV Series

Table of Contents
Section VII - Troubleshooting
Failure to Start...................................................................................................................60
Unscheduled Shutdown ....................................................................................................61
Thermal Overload Relays Tripping....................................................................................61
Low Air Delivery ................................................................................................................62
Low Receiver Pressure.......................................................................................................62
High Receiver Pressure......................................................................................................62
High Discharge Air Temperature and/or High Fluid Injection Temperature.....................63
Frequent Air/Fluid Separator Clogging.............................................................................64
Fluid Discharge Out Blowdown Valve...............................................................................65
Frequent Fluid Filter Clogging..........................................................................................65
Excessive Water Content In Fluid......................................................................................65
Excessive Fluid Consumption............................................................................................66
Frequent Air Cleaner Clogging.........................................................................................66
Inlet Valve Not Opening Or Closing In Relation To Air Demand......................................66
Compressor Does Not Unload When There Is No Air Demand........................................67
Compressor Does Not Revert To Load When Service Line Pressure Drops
To Reset Pressure..............................................................................................................67
Compressor Will Not Time-out Or Shut Down When Unloaded (Auto/Dual Only) ..........67
Excessive Water in Plant Air Distribution System ..............................................................67
Pressure Relief Valve Exhausting.......................................................................................67
Appendix A - Dimensional Drawings
QGV-50 (air-cooled) ..........................................................................................................68
QGV-50 (water-cooled) .....................................................................................................69
QGV-75/100 (air-cooled)...................................................................................................70
QGV-75/100 (water-cooled) ..............................................................................................71
QGV-150/200 (air-cooled).................................................................................................72
QGV-150/200 (water-cooled) ............................................................................................73
Appendix B - Technical Data
QGV-50 .............................................................................................................................74
QGV-75 .............................................................................................................................75
QGV-100 ...........................................................................................................................76
QGV-150 ...........................................................................................................................77
QGV-200 ...........................................................................................................................78
Appendix C - Maintenance Record
Maintenance Record .........................................................................................................79
Standard Terms and Conditions
Standard Terms and Conditions.................................................................................. 80-81
Quincy Compressor-QGV Series

Section I - General Information
• Safety Alert Symbols
• Spare Parts Ordering Information
• Serial/Model Identification Plate
• Royal Blue Warranty
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.
Quincy Compressor-QGV Series 1

Section I - General Information
Spare Parts Ordering Information
Quincy Compressor maintains replacement
parts for Quincy compressors and
accessories. 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. A model/serial
number plate is located on the frame or in
the upper right corner of the control panel
door.
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.
Manual Updates - March 2006:
Pages 3 & 4 - Revised Warranty - Added Royal Blue Warranty.
Page 35 - Corrected fluid level checking instructions.
Page 69 - Added QGV-50 water-cooled dimensional.
Pages 80-81 - Added Standard Terms & Conditions.
Manual Updates - May 2007:
Page 2 - Updated serial tag picture.
Page 3 - Revised Airend coverage on Royal Blue Warranty.
Page 15 - Revised ‘Electrical’.
Pages 44-59 - Revised Section VI - Compressor Fluids.
Manual Updates - October 2007:
Pages 38-39 - Revised Separator Element instructions & added QGV-150/200 Separator
Installation.
2 Quincy Compressor-QGV Series

Section I - General Information
Royal Blue Warranty
Quincy Compressor®Industrial Screw Products
QGV Variable Speed Air Compressors
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.
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.
Only genuine Quincy Compressor
maintenance and replacement parts may be
used.
Quincy Compressor-QGV Series 3

Section I - General Information
Royal Blue Warranty (continued)
Quincy Compressor®Industrial Screw Products
QGV Variable Speed Air Compressors
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:
A completed Airend Failure Information
form.
A copy of the Royal Blue Warranty
Registration/ Agreement form.
Copies of all maintenance logs for the
unit.
Proof of purchase of genuine Quincy
parts and fluids.
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.
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 storage or
damages resulting during shipment;
c) Deviation from operating instructions,
specifications, 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.
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.
4 Quincy Compressor-QGV Series

Notes
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Quincy Compressor-QGV Series 5

Section II - Description
• General Description
• The Compression Cycle
• Air Flow
• Capacity Control System
• Cooling System
• Electrical System
• Control Panel
General Description
Quincy QGV series compressors are
single stage, positive displacement, fluid-
flooded rotary screw compressors with
variable frequency drives. The drive motor
directly drives the male rotor through
a flexible drop out type coupling with
no step up or step down gearing. The
compressor airend contains two precision-
machined rotors, a male rotor with four
lobes in constant mesh with a female
rotor consisting of six flutes. The rotors
are housed in a cast iron cylinder with two
parallel adjoining bores. The airend has
an inlet port at the power input end and
a discharge port at the opposite end. All
parts are machined to exacting tolerances.
QGV model compressors use positive
pressure in the reservoir to circulate the
compressor fluid through the system.
All compressor components are mounted
on a heavy-duty steel frame. Controls and
indicators are arranged on a control panel
and acoustical cabinets are available to
reduce sound levels.
Figure 2-1. Compression Cycle
A) INTAKE
INLET PORT
B) COMPRESSION
CYLINDER
MALE
ROTOR
FEMALE ROTOR
C) DISCHARGE
DISCHARGE PORT
6 Quincy Compressor-QGV Series

Section II - Description
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.
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.
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.
Capacity Control System
The capacity control system on QGV
compressors is a start/stop control which
varies air delivery based on target pressure
(usage).
As the motor begins driving the
compressor rotors, air is drawn in,
compressed and discharged into the
air/fluid reservoir. When the air pressure
in the reservoir exceeds the set point,
the QGV variable speed drive begins
controlling the speed of the compressor.
The drive matches air delivery of the
compressor to air usage in the plant,
maintaining pressure at the target pressure
(± 1 psi).
If a reduction in usage is experienced,
the drive will slow to compensate for the
reduction. If the drive speed slows to 600
RPM (indicating that no air is needed), the
drive will shut down the compressor. The
compressor will restart automatically when
demand returns.
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” section.
Quincy Compressor-QGV Series 7

Section II - Description
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 reservoir 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.
8 Quincy Compressor-QGV Series

Section II - Description
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
QGV compressors.
NOTICE!
Duetocontinuingproductimprovements
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 QGV series compressors utilize 460V
incoming power through a magnetic
starter. A transformer in the control panel
reduces this voltage to 120 VAC for various
electronic controls on the unit. These
controls include the pressure transducer,
high air temperature safety switch and
probe, solenoid valve and 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 QGV 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.
Quincy Compressor-QGV Series 9

Section II - Description
Control Panel
QGV compressors are equipped with an
electronic control with a touch screen
control panel.
Once power is applied to the unit (after
going through several self test routines) the
touch screen (shown above) will indicate
the set point (target pressure), package
output pressure, discharge temperature,
operating mode, total hours of operation,
and the operating speed of the
compressor. A bar graph show the degree
of loading of the compressor. When the
bars match, the delivery pressure equals
the pressure set point.
Messages indicating service items that
need attention will appear on the touch
screen as they are tripped. The touch
screen menu also provides access to
various information and settings for the
compressor.
Only trained and knowledgeable service
personnel should alter the compressor
settings. Reference ‘Section IV - Operating
Procedures’ and ‘Section V - Servicing’ for
more information about QGV compressor
settings and menu options.
10 Quincy Compressor-QGV Series

Section II - Description
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Quincy Compressor-QGV Series 11

Section III - Installation
• 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!
Improperliftingmayresultincomponent,
system damage or personal injury.
Follow good shop practices and safety
procedures when moving the unit.
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 maintained for legibility. Do
not remove any warning, caution or
instructional material attached.
12 Quincy Compressor-QGV Series

Section III - Installation
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.
Clean air is essential for your Quincy
QGV compressor. Always select a source
providing the cleanest air possible. When
an outside air source is used, keep all
piping as short and direct as possible. Use
vibration isolators and support all piping
correctly. Piping size should be at least
as large as the inlet valve opening and
increased several sizes for extremely long
piping runs. The piping must be leak free
and clean after fabrication.
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 QGV 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.
Quincy Compressor-QGV Series 13

Section III - Installation
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.
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 installed 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 must be placed ahead of any
potential blockage point. That includes,
but is not limited to, such components
as shutoff 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 personnel.
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.
14 Quincy Compressor-QGV Series