Quincy QR-25 Series User manual

This manual contains important safety information and must be
carefully read in its entirety and understood prior to installation
byallpersonnelwhoinstall,operateand/ormaintainthisproduct.
On-line product registration, parts ordering and warranty information is available at www.quincycompressor.com
Manual No. 52201-107
January 2014 Edition
QR-25® Series
Instruction Manual

QR-25 Series Quincy Compressor
52201-107, January 2014 ii 3501 Wismann Lane, Quincy IL - 62305-3116
Contents
SECTION 1 SAFETY
Safety First .............................................................................................................................................. 1
Summary of Changes .............................................................................................................................. 3
SECTION 2 SYSTEM DYNAMICS
Description & Application....................................................................................................................... 4
Principles of Compression Cycles ........................................................................................................... 4
Principles of Lubrication Systems .......................................................................................................... 5
Principles of Cooling Systems................................................................................................................. 5
Principles of Dryers & Filters................................................................................................................. 5
Control Components................................................................................................................................ 5
Control Versions ...................................................................................................................................... 5
Specifications ........................................................................................................................................... 7
SECTION 3 INSTALLATION
Receiving Delivery................................................................................................................................... 8
Freight Damage....................................................................................................................................... 8
Location.................................................................................................................................................... 9
Electrical Supply Requirements ........................................................................................................... 10
Mounting................................................................................................................................................ 10
System Components .............................................................................................................................. 11
Wiring Schematics................................................................................................................................. 12
Induction System................................................................................................................................... 14
Compressed Air Discharge System....................................................................................................... 15
SECTION 4 START-UP & OPERATION
Pre-Starting Checklist........................................................................................................................... 19
Initial Starting & Operating................................................................................................................. 20
Daily Starting Checklist........................................................................................................................ 20
SECTION 5 MAINTENANCE & LUBRICATION
Stopping for Maintenance..................................................................................................................... 22
Maintenance Schedule .......................................................................................................................... 22
Maintenance Schedule Checklist Sample ............................................................................................ 22
Lubrication............................................................................................................................................. 23
Pulley / Sheave Alignment & Belt Tension .......................................................................................... 24
Pressure Switch Adjustment................................................................................................................. 26
Reversal of Compressor Rotation ......................................................................................................... 26
Pilot Valve Adjustments ........................................................................................................................ 28
SECTION 6 TROUBLESHOOTING
Troubleshooting ..................................................................................................................................... 29
SECTION 7 REFERENCE INFORMATION
Approximate Capacity Correction for Altitude .................................................................................... 33
Average Intercooler Pressures .............................................................................................................. 34
Decal Locations...................................................................................................................................... 35

QR-25 Series Quincy Compressor
52201-107, January 2014 1 3501 Wismann Lane, Quincy IL - 62305-3116
SECTION 1 SAFETY
Safety First
At Quincy Compressor safety is not only a primary concern, but a faithfully
performed practice. Beginning with the design stage, safety is built into every
Quincy compressor. It is the intention of this manual to pass along the “safety
first” concept to you by providing safety precautions throughout its pages.
“DANGER !”, “WARNING !”, and “CAUTION !” are displayed in large
bold capital letters in the left hand column to call attention to areas of vital
concern. They represent different degrees of hazard seriousness, as stated
below. The safety precaution is spelled out in bold upper and lower case let-
ters in the right hand column.
Immediate hazards which will result in severe personal injury or
death.
Hazards or unsafe practices that could result in personal injury or
death.
Hazards or unsafe practices which could result in minor personal
injury, product or property damage.
Each section of this instruction manual,as well as any instructions supplied
by manufacturers of supporting equipment, should be read and understood
prior to starting the compressor. If there are any questions regarding any
part of the instructions, please call your local Quincy Compressor distributor,
or the Quincy Compressor factory before creating a potentially hazardous
situation. Life, limb, or equipment could be saved with a simple phone call.
Compressors are precision high speed mechanical equipment requiring
caution in operation to minimize hazard to property and personnel. There
are many obvious safety rules that must be observed in the operation of this
type of equipment. Listed below are some additional safety precautions that
must be observed.
•Transfer of toxic, dangerous, ammable or explosive substances using Quincy
Compressor products is at the user’s risk.
•All installation, maintenance and repair must be performed by a qualied
technician and/or electrician.
•Turn off and lockout/tagout (per OSHA regulation 1910.147) the main power
disconnect switch before attempting to work or perform any maintenance.
•Wear safety glasses and hearing protection during operation, service and
maintenance procedures.
•Do not attempt to service any part of the unit while it is operating.
•Allow ample time for the compressor to cool before performing service pro-
WARNING !
CAUTION !
DANGER !

QR-25 Series Quincy Compressor
52201-107, January 2014 2 3501 Wismann Lane, Quincy IL - 62305-3116
cedures. Some surface temperatures exceed 350°F when the compressor is
operating.
•Per OSHA regulation 1910.147, relieve the system of all pressure before at-
tempting to service any part of the unit.
•Do not operate the unit with any of its safety guards, shields, or screens
removed.
•Do not remove or paint over any DANGER!, WARNING!, CAUTION!, or
instructional materials attached to the compressor. Lack of information re-
garding hazardous conditions can cause property damage or personal injury.
•Periodically check all pressure relief valves for proper operation.
•Do not rebuild or change the pressure setting of the pressure relief valve, re
strict the function of the inlet or outlet of the pressure relief valve, or replace
the pressure relief valve with a plug or any device not specifically certified
for this function.
•Do not install a shutoff valve in the compressor discharge line with out rst
installing a pressure relief valve of proper size and design between the shutoff
valve and the compressor.
•All components of the compressed air system must be properly rated for the
application.
•Alterations must not be made to this compressor without Quincy Compres-
sor’s approval.
•Be sure that all tools, shipping and installation debris have been re moved
from the compressor and installation site prior to starting the compressor.
Do not operate a Quincy Compressor in excess of 250 PSIG unless
it has been tested and certified for high pressure application by
Quincy Compressor prior to shipment.
•High pressure units (pressures exceeding 250 PSIG) require parts certied
for use in high pressure applications. When replacing parts on high pressure
units, please consult the parts manual and use only the part numbers listed
in that manual.
•Do not operate the compressor in excess of the ASME pressure vessel rating
for the receiver or the service rating of the compressor, whichever is lower.
•Make a general overall inspection of the unit daily and correct any unsafe
situations. All fasteners must be kept tight.
•Reckless behaviour of any kind involving compressed air is dangerous and
can cause very serious injury to the participants.
•Provisions should be made to have the instruction manual readily available
WARNING !

QR-25 Series Quincy Compressor
52201-107, January 2014 3 3501 Wismann Lane, Quincy IL - 62305-3116
to the operator and maintenance personnel. If for any reason any part of the
manual becomes illegible or the manual is lost, have it replaced immediately.
The instruction manual should be read periodically to refresh one’s memory.
It may prevent a serious or fatal accident.
•Never use a ammable or toxic solvent for cleaning the air lter or any parts.
Air used for breathing or food processing must meet OSHA 29 CFR
1910.134 or FDA 21 CFR 178.3570 regulations. Failure to do so may
cause severe injury or death.
Oil and moisture residue must be drained from the air receiver
daily or after each use. Accumulations of oil residue in the receiver
can be ignited by embers of carbon created by the heat of compres-
sion, causing an explosion, damage to property and injury to per-
sonnel.
When using battery cables to start engine driven units do not use
more than a total of 40 ft. of #4 gauge cable (GND & HOT).
The owner, lessor or operator of any compressor unit manufactured by
Quincy Compressor is hereby warned that failure to observe the safety precau-
tions and procedures outlined in this manual may result in serious personal
injury, damage to property, and may void your warranty. Quincy Compressor
must authorize all warranty service. Before contacting your distributor or the
factory, check the maintenance requirements and the troubleshooting guide
for your compressor. Most warranty issues can be resolved by following proper
maintenance procedures.
Quincy Compressor neither states as fact, nor in any way implies that the
above list of safety precautions is an all inclusive list, the observance of which
will prevent all damage to property or injury to personnel.
Every effort has been taken to ensure that 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 equip-
ment previously or subsequently sold.
Summary of Changes to This Manual
(since previous printing dated December 2012):
· Edited Control Versions information to reect the introduction of the
redesigned combination head unloader / pilot and check valve.
· Clarified safety statement relative to properly rated components for the
compressed air system.
DANGER !
WARNING !
CAUTION !

QR-25 Series Quincy Compressor
52201-107, January 2014 4 3501 Wismann Lane, Quincy IL - 62305-3116
SECTION 2 SYSTEM DYNAMICS
Description & Applica-
tion
The Quincy Compressor QR25
Series consists of heavy duty
industrial, belt driven, single or
two stage compressors. Single
stage compressors are capable
of delivering up to 100 PSIG
continuously. Some single
stage compressors are capable
of delivering up to 150 PSIG
intermittantly (with proper
controls and modica tions). Two
stage compressors can deliver
up to 200 PSIG contin uously,
and up to 250, 350 or 500 PSIG
intermittently depending upon
the model, controls and configu-
ration.
Principles of Compres-
sion Cycles
Single Stage Compressors
During the downstroke of a
single stage compressor, air is
drawn through an intake valve
in the head of the compressor
and into the cylinder. At the
bottom of the stroke, the intake
valve closes and air is trapped in the cylinder. The air is then compressed
in the cylinder during the upstroke of the piston. Total compression, from
atmospheric pressure to the final discharge pressure, is accomplished in one
stroke of the piston.
Two Stage Compressors
During the downstroke of the piston of a two stage compressor, air is drawn
through an intake valve in the head of the compressor into the low pressure
cylinder and compressed during the upstroke of the piston.
The compressed air is then released through a discharge valve in the head
of the compressor to an intercooler (usually nned tub ing) where the heat
resulting from compression is allowed to dissipate. The cooler compressed air
is then drawn into a second compression cylinder, the high pressure cylinder,
for compression to final pressure.
From there the compressed air is released through a discharge valve to an
air receiver tank or directly to a network of compressed air supply lines. In
one revolution of the crankshaft a compression cycle is completed.
Fig. 2-1 Cross Section of Typical QR-25
2 Stage Pressure Lubricated Cylinder & Crankcase
Pix 1064

QR-25 Series Quincy Compressor
52201-107, January 2014 5 3501 Wismann Lane, Quincy IL - 62305-3116
Principles of Lubrication Systems
Moving parts within the crankcase are supplied with lubrication by a posi-
tive displacement, gerotor type oil pump. Oil is drawn up from the bottom of
the crankcase to the oil pump through an oil sump strainer screen. The oil is
then forced under pressure through the oil lter (if so equipped). Oil travels
under pressure through drilled journals in the crankshaft and connecting rods
to lubricate crankshaft bearings, connecting rod journals, wrist pin bearings
and the cylinder walls.
Principles of Cooling Systems
Fan blades of the compressor sheave force ambient air across ns of the cylinder
head(s), and intercooler ns of two stage compressors, to cool the compressor.
QR25 series compressors are normally set up at the factory with a sheave that
turns in a counterclockwise rotation. For special applications, clockwise rota-
tion compressor sheaves are available as optional equipment on some models.
QR25 series compressors should be operated in temperatures under 104°F.
Principles of Dryers & Filters
Moisture occurs naturally in air lines as a result of compression. Moisture
vapor in ambient air is concentrated when pressurized and condenses when
cooled in downstream air piping. Compressed air dryers reduce the moisture
vapor concentration and prevent water formation in compressed air lines.
Dryers are a recommended companion to lters, aftercoolers, and automatic
drains for improving the productivity of compressed air systems.
Water and moisture vapor removal increases the efciency of air operated
equipment, reduces contamination and rusting, increases the service life of
pneumatic equipment and tools, prevents air line freeze-ups, and reduces
product rejects.
Control Components
Unloader Towers: Provided as part of the basic compressor when control
version is specified.
Pilot Valve: Used in conjunction with unloader towers when the compressor
is to run continuously and an operating pressure range is to be maintained.
Refer to your parts manual for correct pilot valve, ranges and settings.
Hydraulic Unloader: The hydraulic unloader allows the compressor to start
in an “unloaded” state, that is, the compressor starts but does not begin to
create compressed air until oil pressure is established.The hydraulic unloader
also guards against excessive damage in the event of an oil pressure drop.
Pressure Switch: Used for start/stop appli cations (usually accompanied by a
hy draulic unloader). The pressure switch detects the demand for compressed
air and allows the unit to start. When the de mand is satised, the unit stops.
Control Versions
Various control versions are available for the model QR25 series compressors.
The control version required is determined by how frequent there is a demand
for compressed air. The idea is to create compressed air on demand, but to
limit the number of times a motor must start the compressor in a given time

QR-25 Series Quincy Compressor
52201-107, January 2014 6 3501 Wismann Lane, Quincy IL - 62305-3116
FROM THE
AIR RECEIVER
HYDRAULIC
UNLOADER
Pix 106
9
UNLOADER TOWERS
Fig. 2-2 Control Version L
Pix 1069
AUTOMATIC
PRESSURE
SWITCH
CHECK
VALVE
TO
AIR
RECEIVER
Pix 1155
PRESSURE
RELIEF
VALVE
Pix 1155
Fig. 2-3
Control Version L Variation
(Discharge Line Check Valve
& Pressure Switch)
Pix 5093
Fig. 2-5 Control Version LVD *1, 2, or 4 unloader towers are employed depending upon the model of compressor.
period. To prevent motor burnout, the motor should be limited to no more
than six (6) starts per hour.
Control Version P : Describes a basic compressor with no added control
features.
Control Version L : Consists of unloader tower(s)* located on the head of
the compressor, a hydraulic unloader mounted on the bearing carrier, and a
pressure switch.This version is recommended for those applications where
the compressor will not be required to start more than six (6) times per
hour. A compressor equipped with control Version L is sometimes referred
to as a “start/stop machine”
Control Version L Variation: A variation of Control Version L is illus-
trated in Fig. 2-3. It shows how a discharge line check valve, pressure
switch,& pressure relief valve are combined to provide start/stop operation.
Control Version LS: This version consists of a head assembly with unloader
tower(s)* a pilot valve and a hydraulic unloader. It is usually applied to
gas or diesel engine driven units. This version is best suited for “continu-
ous run” applications (whenever the compressor must start more than six
[6] times per hour). If the demand for compressed air is continuous and
exceeds one half or more of the compressor’s capacity, Control Version LS
should be used.
Once the compressor is started, it continues to run until it is manually
turned off. Whenever there is a demand for compressed air, the pilot valve
closes, allowing the unloader in the unloader tower to de-actuate. At this
point, the compressor starts making compressed air.As soon as the demand
for compressed air is met, the pilot valve opens, allowing air pressure to
actuate in the unloader tower. The compressor continues to run but does
not compress air. The pilot valve has a manual toggle, to manually actuate
the unloader.
Control Version LVD: Unloader tower(s)*, a pilot valve with a manual
shut-off, a hydraulic unloader,a check valve assembly, and a pressure switch
make up the LVD Control Version. This version is recommended wherever
the degree of demand and usage is variable.
The manual shutoff allows for the selection of either “start/stop” or “con-
tinuous run” control. In either situation, the hydraulic unloader protects
the compressor from excessive damage caused by a drop in oil pressure.
Fig. 2-4 Control Version LS
Pix 5092

QR-25 Series Quincy Compressor
52201-107, January 2014 7 3501 Wismann Lane, Quincy IL - 62305-3116
**Maximum continuous pressure is indicated on left side, maximum intermittent high pressure on right side.
†High pressure basics required for pressures above 250 PSIG applications.
Specifications
Bore(s) RPM Maximum
Model Stroke LP - HP Range PSIG**†
210 2 2 1/2 4001000 100/150
216 2 1/2 3 400900 100
240 3 4 400900 100
270 4 4 1/2 400900 100
4125 4 4 1/2 400900 100
310 2 1/2 3 1/2  2 400900 200/500
325 3 4 1/2  2 1/2 400900 200/500
340 3 1/2 5 1/4  3 400900 200/500
350 3 1/2 6  3 1/4 400900 200/350
370 4 6  3 1/4 4001070 200/250
390 4 7 1/2  4 400950 200/250
5120 4 6  3 1/4 4001050 200/250

QR-25 Series Quincy Compressor
52201-107, January 2014 8 3501 Wismann Lane, Quincy IL - 62305-3116
SECTION 3 INSTALLATION
Receiving Delivery
Immediately upon receipt of compressor equipment and prior to completely
uncrating, the following steps should be taken:
Step 1) Inspect compressor equipment for damage that may have occurred
during shipment. If any damage is found, demand an inspection
from the carrier. Ask the carrier how to file a claim for shipping
damages. (Refer to SECTION 3, Freight Damage for complete
details.) Shipping damage is not covered by Quincy Com-
pressor warranty.
Step 2) Insure that adequate lifting equipment is available for moving
the compressor equipment.
Improper lifting can result in component or system damage, or
personal injury. Follow good shop practices and safety procedures
when moving the unit.
Step 3) Read the compressor nameplate to verify the model and size or-
dered.
Step 4) Read the motor nameplate to be sure the motor is compatible with
your electrical conditions (volts, phase, hertz). NOTE: If voltage
drops below 207 volts, use a 200 volt motor. Do not substi-
tute with a triple voltage (208/230-460) 3 phase motor.
Step 5) Read the pressure relief valve nameplate to be sure it does not
exceed the working pressure shown on the compressor or any other
component in the system.
Step 6) Read and understand the safety precautions contained
within this manual. The successful and efficient operation of
compressor equipment depends largely upon the amount of care
taken to install and maintain the equipment. Quincy Compressor
strongly recommends that any or all person(s) in charge of install-
ing, maintaining, or servicing one of our compressors read and
understand the entire contents of this manual in order to perform
such duties safely and efficiently.
Freight Damage
It is extremely important that you examine every carton and crate as soon as
you receive it. If there is any obvious damage to the shipping container, have
the delivering carrier sign the freight bill, noting the apparent damage, and
request a damage report.
If concealed damage is discovered at a later date, the carrier must
be notified within 15 days of initial receipt of freight. Concealed ship-
ping damage is not covered by Quincy Compressor Warranty. Contact
the carrier as soon as possible, giving them an opportunity to inspect the ship-
CAUTION !