Quincy Compressor Climate Control Series User manual

This manual contains important safety information and must be
carefully read in its entirety and understood prior to installation
by all personnel who install, operate and/or maintain this product.
On-line product registration, parts ordering and warranty information is available at www.quincycompressor.com
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
Manual No. 2022209100
May 2019 Edition
Instruction Manual
Climate Control Series

Climate Control Series Quincy Compressor
2022209100, August 2018 1
† Before 1996, 310QRB (11/2h.p.) was produced.
INTRODUCTION
The Quincy Compressor Climate Control Series consists of splash or pressure
lubricated reciprocating air compressors.This instruction manual provides you
with general and specific information regarding these compressors. Outlined
below is a Model Designation Code to assist you in determining which unit
you have as well as the specific basic compressor.
Model Designation Code for Splash Lubricated Unit Models
QC 005 03 D 1 A
Splash Lubricated Horsepower Tank Size Type Phase Design Revision Letter
Basic
Horsepower Compressor Tank Size Type Phase
005 = 1/2h.p. § QTS3QCB 03 = 30 gal. S = simplex 1 = 60 Hz. 1 Phase
007 = 3/4h.p. § QTS3QCB 06 = 60 gal. D = duplex 3 = 60 Hz. 3 Phase
010 = 1 h.p. § QTS3QCB 08 = 80 gal.
015 = 11/2h.p. § QTS3QCB 12 = 120 gal.
020 = 2 h.p. † QTS5QCB 20 = 200 gal.
030 = 3 h.p. † QTS5QCB 24 = 240 gal.
050 = 5 h.p. ‡ QT7QCB BB = base mount
075 = 71/2h.p. **QT10QCB BR = retrofit
100 = 10 h.p. QT15QCB EPT4 = Emergency Portable Q911 (twin 4 gal. tanks)
151 = 15 h.p. QT15QCB
§ Before 1994, X3QCB (1/2h.p.), 210QCB (3/4& 1 h.p.) & QT5QCB (11/2h.p.) were produced.
† Before May of 2001, QT5QCB was offered as 2 & 3 h.p. QT5QCB is used on 2 & 3 h.p. retrofit package only.
‡ 5 h.p. retrofit package also produced with QT7QCB. The package was supplied with QT5QCB prior to Sept. 2000.
** Prior to July 1, 2000, QT15QCB basic compressor was offered as 7 1/2h.p.
Model Designation Code for Pressure Lubricated Unit Models
QR 050 08 S 3 A
Pressure Lubricated Horsepower Tank Size Type Phase Design Revision Letter
Basic
Horsepower Compressor Tank Size Type Phase
010 = 1 h.p. 210QRB 03 = 30 gal. S = simplex 1 = 60 Hz. 1 Phase
015 = 11/2h.p. † 210QRB 06 = 60 gal. D = duplex 3 = 60 Hz. 3 Phase
020 = 2 h.p. 325QRB 08 = 80 gal.
030 = 3 h.p. 325QRB 12 = 120 gal.
050 = 5 h.p. 340QRB 20 = 200 gal.
075 = 71/2h.p. 350QRB 24 = 240 gal.
100 = 10 h.p. 390QRB BB = base mount
150 = 15 h.p. 5120QRB
200 = 20 h.p. 5120QRB

Climate Control Series Quincy Compressor
2022209100, August 2018 2
TABLE OF CONTENTS
SECTION 1 SAFETY
• Safety First ........................................................................................................................................... 3
• Summary of Changes ........................................................................................................................... 5
SECTION 2 SYSTEM DYNAMICS
• Principles of Compression Cycles........................................................................................................ 6
• Principles of Lubrication System ........................................................................................................ 6
• Principles of Cooling System ............................................................................................................... 7
• Principles of Dryers & Filters.............................................................................................................. 7
• Principles of Control System ............................................................................................................... 7
SECTION 3 INSTALLATION
• Receiving Delivery................................................................................................................................ 8
• Freight Damage.................................................................................................................................... 8
• Location................................................................................................................................................. 9
• Electrical Supply Requirements........................................................................................................ 10
• Mounting............................................................................................................................................. 11
• System Components........................................................................................................................... 11
• Wiring & Piping Schematics.........................................................................................................12-16
• Induction System................................................................................................................................ 18
• Compressed Air Discharge System ................................................................................................... 19
SECTION 4 START-UP &
OPERATION
• Prestarting Checklist ......................................................................................................................... 23
• Initial Starting & Operating.............................................................................................................. 24
• Daily Starting Checklist .................................................................................................................... 24
SECTION 5 MAINTENANCE
& LUBRICATION
• Stopping for Maintenance.................................................................................................................. 26
• Maintenance Schedule ....................................................................................................................... 26
• Lubrication ......................................................................................................................................... 28
• Lubricant Filter.................................................................................................................................. 29
• Pulley/Sheave Alignment & Belt Tension ......................................................................................... 29
SECTION 6 TROUBLESHOOTING
• Troubleshooting .................................................................................................................................. 31
• Decal Diagram.................................................................................................................................... 35

Climate Control Series Quincy Compressor
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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.
“WARNING !”, “CAUTION !”, and “DANGER !” 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 letters
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 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, flammable or explosive substances using Quincy
Compressor products is at the user’s risk.
•All installation, maintenance and repair must be performed by a qualified
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.
•Do not attempt to service any part of the unit while it is running.
•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.
WARNING !
CAUTION !
DANGER !

Climate Control Series Quincy Compressor
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•Allow ample time for the compressor to cool before performing service pro-
cedures. Some surface temperatures exceed 350°F when the compressor is
operating.
•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 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.
•Do not install a shutoff valve in the compressor discharge line without first
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 removed
from the compressor and installation site prior to starting the compressor.
•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 and fittings must be kept tight.
•Reckless behavior 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
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.
•Wear safety glasses and hearing protection during operation, service and
maintenance procedures.
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.
DANGER !
WARNING !

Climate Control Series Quincy Compressor
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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 January 2013):
· Clarified safety statement relative to properly rated components for the
compressed air system.
· Updated lubricant capacity specifications for pressure lubricated models
as result of bearing carrier redesign.
· Added Lubricant Filter information.

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SYSTEM DYNAMICS
•Principles of Compression 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 bot-
tom 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 and into the low pres-
sure cylinder. This air is 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 finned tubing) 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.
•Principles of Lubrication System
Splash Lubricated Models
With each stroke of the compressor, a dipper attached to the bottom of the
connecting rod, dips into a lubricant bath at the bottom of the crankcase. This
dipper causes the lubricant to splash throughout the interior of the crankcase,
lubricating all moving parts.
It is important with this system that the lubricant level be maintained
between the high and low level marks on the dipstick. If the lubricant level
is too high, excessive lubricant carryover could result. If the lubricant level is
too low, or the compressor is not operated within the correct RPM range, the
moving parts will not be adequately lubricated.
Pressure Lubricated Models
Moving parts within the crankcase are lubricated by means of a positive
displacement, gerotor type oil pump. Lubricant is drawn up from the bottom
of the crankcase to the oil pump through an oil sump strainer screen. The
lubricant is then forced under pressure through the oil filter (if so equipped).
Lubricant travels under pressure through drilled journals in the crankshaft
and connecting rods to lubricate crankshaft bearings, wrist pin bearings and
the cylinder walls.

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•Principles of Cooling System
Fan blades in the compressor sheave force ambient air across fins on the cylin-
der heads (and intercooler fins of two stage compressors). Quincy 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 filters, aftercoolers, and automatic
drains for improving the productivity of compressed air systems.
Water and moisture vapor removal increases the efficiency 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.
•Principles of Control System
Simplex Units
Simplex Climate Control units are controlled by a pressure switch which
detects the demand for compressed air and allows the motor to start. When
the demand is satisfied, the unit stops.
Duplex Units
Duplex Climate Control units are controlled by multiple pressure switches
(one for each compressor). They react to a demand for air the same way as a
simplex unit. In addition to the pressure switches, duplex units can be con-
trolled by an electrical alternating switch that automatically distributes the
workload evenly between the two basic compressors. The following example
best explains the process:
The lead compressor starts and runs to satisfy the air demand. When the
pressure in the system reaches the cut-out pressure of the lead compressor, it
shuts off. The next time air is required, the lag compressor starts up first and
becomes the lead compressor.
If the lead compressor can not satisfy the air demand, the lag compressor
will automatically start and assist until the pressure in the system reaches
the cut-out pressure. At the cut-out pressure, both the lead compressor and
lag compressor shut down. The cut-in pressure of the lead pressure switch is
normally set 10 PSIG higher than the lag pressure switch.

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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 verify that the volt, phase and hertz
ratings are the same as the electrical power supply connecting to
the motor. NOTE: Do not use a triple voltage (115/208-230)
single-phase motor or (208-230/460) 3-phase motor for 208
volts or lower. Use a 200 volt or 208 volt motor only.
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. Contact the carrier as
soon as possible, giving them an opportunity to inspect the shipment at the
premises where the delivery was made. Do not move the damaged freight from
CAUTION !

Climate Control Series Quincy Compressor
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the premises where the original delivery was made. Retain all containers and
packing for inspection by the carrier.
A claim form can be requested from the carrier: Standard Form for Pre-
sentation of Loss and Damage Claims (form # 3208). Your claim will need to
be substantiated with the following documents:
a.) form #3208
b.) original bill of lading
c.) original paid freight bill
d.) original invoice or certified copy
e.) other particulars obtainable in proof of loss or damage (photos,
damage inspection, etc.)
The proper description and classification of our product in the National
Motor Freight Classification 100-H,contained in item 118100,reads as follows:
“Compressors, air, or air ends: with or without air tanks, hose or nozzles,
mounted or not mounted.”
We suggest that these instructions be circulated to your shipping and
receiving personnel.
•Location
Quincy air compressors must be installed and operated in a secure and
upright position in an area that is clean, dry, well lighted, adequately venti-
lated, and protected from adverse conditions and/or elements. Inspection and
maintenance checks are required daily. Therefore, sufficient space needs to
be provided around the compressor for safe and proper inspection, cleaning,
and maintenance.
The compressor must not be installed closer than 24 inches to a wall or
another compressor. This allows ample circulation of air across the compres-
sor cylinders, heads and cooler (if so equipped). Do not allow hot air from ad-
ditional equipment blow towards the compressor. If at all possible, the pulley
drive system (i.e. motor pulley, compressor sheave, belts and guard) should
be located next to a wall to minimize any danger created by the drive system
while the compressor is operating.
Quincy compressors should be operated in temperatures under 104°F. In
cold climates, the compressor should be installed in a heated building.
Do not operate this compressor in ambient temperatures lower
than -15° F. A crankcase heater is recommended for a compressor
that is to operate in temperatures under 32° F.
Under no circumstances should a compressor be used in an area
that may be exposed to toxic, volatile, or corrosive atmosphere. Do
not store toxic, volatile, or corrosive agents near the compressor.
CAUTION !
WARNING !

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Noise
Noise is a potential health hazard that must be considered. There are federal
and local laws governing acceptable noise levels. Check with local officials for
specifications.
Excessive noise can be effectively reduced through various methods. Total
enclosures, intake silencers, baffle walls,relocating or isolating the compressor
can reduce noise levels.Care must be taken when constructing total enclosures
or baffle walls. If not properly constructed or positioned, they could contribute
to unacceptable noise levels or overheating. Consult your local Quincy distribu-
tor if assistance is required.
Unusual noise or vibration indicates a problem. Do not operate the
compressor until the source has been identified and corrected.
•Electrical Supply Requirements
The electrical installation of this unit must be performed by a qualified electri-
cian in accordance with the National Electrical Code (NEC) or the Canadian
Electrical Code (CEC), the National Electrical Safety Code (NESC), OSHA
and/or state and local codes. Failure to abide by the national, state and local
codes may result in physical harm and/or property damage.
Before installation, the electrical supply must be checked for adequate
wire size and transformer capacity. Verify that the electrical supply voltage
matches the requirements of the motor. A suitable circuit breaker or fused
disconnect switch should be provided. When a 3 phase motor is used to drive
a compressor, any unreasonable voltage imbalance between the legs must be
eliminated and any high or low voltage corrected to prevent excessive current
draw. Note: This unit must be grounded.
High voltage may cause personal injury or death. Disconnect and
lockout/tagout per OSHA regulation 1910.147 all electrical power
supplies before opening the electrical enclosure or servicing.
Never assume a compressor is safe to work on just because it is not
operating. It could restart at any time. Follow all safety precau-
tions outlined in SECTION 5, •Stopping For Maintenance.
NEMA electrical enclosures and components must be appropriate
to the area installed.
Overload Relay
An overload relay monitors the compressor motor electrical current and turns
the compressor motor off when an overload is sensed. It is mounted on the
bottom of the motor starter. The overload relay is designed for motors with a
1.15 service factor. The overload relay setting should be adjusted to the mo-
tor nameplate amp rating. If the motor has a service factor rating other than
1.15, the overload relay setting must be adjusted to compensate. Contact your
Quincy distributor for assistance.
CAUTION !
WARNING !
CAUTION !
DANGER !

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Overload relays are designed to protect the motor from damage
due to motor overload. If the overload relay trips persistently, DO
NOT CONTINUE TO PUSH THE RESET BUTTON! Contact your lo-
cal Quincy distributor for assistance.
•Mounting
The compressor unit must be removed from the shipping skid prior
to operation.
Proper mounting of Quincy Compressor units is crucial to the safe operation
and longevity of the equipment. The installation requires a flat and level
concrete floor or pad. Satisfactory results can usually be obtained by mount-
ing horizontal tank units on vibration isolating pads available from your
local Quincy Distributor. All vertical tank
units must be anchored! Refer to Fig. 3-1,
Isolator Installation for Unanchored or
Anchored Receivers. Quincy recommends
that all vertical tank units be mounted as
indicated without isolators.
State or local codes may mandate that the
compressor be bolted to the floor. In this case
the unit must be leveled and bolted making
absolutely certain the feet are not stressed
in any manner. Leave the locknut loose!
Uneven feet drawn tightly to the concrete
pad will cause severe vibrations resulting
in cracked welds or fatigue failure. The
customer is responsible for providing a
suitable foundation & isolator mounting
where necessary.
Do not operate this compressor more than 15° off level or move it
while it is operating.
•System components
Efficiency and safety are the primary concerns when selecting components
for compressed air systems. Products of inferior quality can not only hinder
performance of the unit, but could cause system failures that result in bodily
harm or even death. Select only top quality components for your system. Call
your local Quincy Distributor for quality parts and professional advice.
Drive Pulleys
Drive pulleys must be properly aligned and drive belt tension set to specifica-
tions (refer to SECTION 5, •Pulley / Sheave Alignment & Belt Tension).
Improper pulley alignment and belt tension can cause motor overloading,
excessive vibration, and premature belt and/or bearing failure.
Excessive compressor RPM’s (speed) could cause a pulley to shat-
ter. In an instant, the pulley could separate into fragments capable
of penetrating the belt guard and causing bodily harm or death. Do
not operate the compressor above the recommended RPM (refer to
SECTION 2, •Specifications).
HORIZONTAL TANK UNITS
ANCHORED
VERTICAL TANK UNITS
ANCHORED
HORIZONTAL TANK UNITS
UNANCHORED
1/2” locknut
1/2” at washer
tank foot
isolator backing plate
1/2” x 2” bolt
isolator
1/2” locknut
1/2” at washer
tank foot
isolator backing plate
isolator
1/2” oor stud
(provided by customer)
1/2” oor stud
(provided by customer)
tank foot
1/2” locknut
1/2” at washer
Fig. 3-1 Isolator Installation for
Unanchored or Anchored Receivers
CAUTION !
WARNING !
WARNING !
CAUTION !

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Fig. 3-2 Typical Three Phase Magnetic Starter
Wiring Schematic WP1744A
Magnetic Starter
Contactor
Overload
Relay
Connect incoming power lines
at screw terminals L1, L2 & L3.
CAUTION !
Verify all wires are secure
and fasteners are torqued
before connecting power to
the unit.

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Fig. 3-3 Typical Single Phase Magnetic Starter
Wiring Schematic WP1744B
Magnetic Starter
Contactor
Overload
Relay
Connect incoming power lines
at screw terminals L1 & L2.
CAUTION !
Verify all wires are secure
and fasteners are torqued
before connecting power to
the unit.

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Fig. 3-5 Loadless Starting Piping Schematic
For QR Simplex & Duplex Units (2 h.p. & above Units)
Fig. 3-6 Start/Stop Control
For QR 1 h.p. & 11/2h.p. Simplex Units
Piping Schematic WP1781B

Climate Control Series Quincy Compressor
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Fig. 3-7 Start/Stop Control
For QC Simplex Units & QR 2 h.p. & Above Units
Piping Schematic WP1781KO

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Fig. 3-8 Typical Diagram
for QR 1 h.p. & 11/2h.p. Duplex Units

Climate Control Series Quincy Compressor
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Guards
All mechanical action or motion is hazardous in varying degrees and needs
to be guarded. Guards should be designed to achieve the required degree of
protection and still allow full air flow from the compressor sheave across the
unit. Guards shall be in compliance with OSHA safety and health standards
29 CFR 1910.219 in OSHA manual 2206 and any state or local codes.
Guards must be fastened in place before starting the compressor
and never removed before cutting off and locking out the main
power supply.
Check Valves
Check valves are designed to prevent back-flow of air pressure in the com-
pressed air system (air flows freely in one direction only).The check valve must
be properly sized for air flow and temperature. Do not rely upon a check
valve to isolate a compressor from a pressurized tank or compressed
air delivery system during maintenance procedures!
Manual Shutoff Valves
Manual shutoff valves block the flow of air pressure in either direction. This
type of valve can be used to isolate a receiver from a pressurized system,
provided the system is equipped with a pressure relief valve capable of being
manually released. Shutoff valves must be equipped with a lockout feature
and always locked in a closed position when the unit is being serviced. A pres-
sure relief valve must be installed between the manual shutoff valve and the
compressor (refer to Fig. 3-10, Typical Drop Leg & Component Location).
Pressure Relief Valves
Pressure relief valves aid in preventing system failures by relieving system
pressure when compressed air reaches a set level.They are available in various
pressure settings to accommodate a range of applications. A check valve and
pressure relief valve are required in all QC Series compressor discharge lines.
Pressure relief valves are preset by the manufacturer and under no circum-
stances should the setting be changed by anyone other than the manufacturer.
Pressure relief valves are designed to protect compressed air
systems in accordance with ASME B19 safety standards. Failure to
provide properly sized pressure relief valves may cause property
damage, severe personal injury or even death.
Pressure Switch
The pressure switch detects the demand for com-
pressed air and allows the motor to start. When
the demand is satisfied, the unit stops. Pressure
switches provided by Quincy Compressor are
pre-set at the factory and usually do not require
adjustment.However,the following procedures can
be performed by a qualified electrician to adjust
the pressure switch.
Step 1) Remove the pressure switch cover.
DANGER !
WARNING !
Fig. 3-9 Pressure Switch
PRESSURE
ADJUSTMENT
SCREW
ELECTRICAL
CONTACTS

Climate Control Series Quincy Compressor
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Step 2) While the compressor is running, screw the spring loaded adjust-
ment screw in (clockwise) to increase the amount of air pressure
required to open the switch and stop the unit.
Screw the spring loaded adjustment screw out (counterclock-wise) to de-
crease the amount of air pressure required to open the switch and stop the unit.
The maximum discharge pressure for a Climate Control Series
compressor is 90 PSIG Do not set the pressure switch to exceed this
limit.
Electric power always exists inside the pressure switch whenever
the compressor package is connected to a power supply. Be careful
not to touch any electrical leads when setting the pressure switch.
Never exceed the designed pressure for the system or overload the
motor beyond its Maximum Amp Draw.
* Full Load Amps x Service Factor = Maximum Amp Draw
* Full Load Amps (FLA) & Service Factor can be found on the motor nameplate.
Never assume a compressor is safe to work on just because it is not
operating. It may be in the automatic stand-by mode and may re-
start any time. Follow all safety precautions outlined in SECTION
5, •Stopping For Maintenance.
•Induction System
Air Intake
A clean, cool and dry air supply is essential to the satisfactory operation of your
Quincy air compressor. The standard air filter that the compressor is equipped
with when leaving the factory is of sufficient size and design to meet normal
requirements, when properly serviced, in accordance with the maintenance
section of this manual.
If, however, the compressor is to be installed in a location where consid-
erable dust, dirt and other contaminants are prevalent, consult your local
Quincy distributor for advice and optional filters. A condensate trap must be
installed as close as possible to the inlet filter if, as a result of installation or
environmental conditions, there is any risk of moisture forming in the inlet
piping. It is the user’s responsibility to provide adequate filtration for those
conditions. Oil bath filters are not to be used. Warranty will be void if a
failure is determined to be caused by inadequate filtration.
Remote Inlet Filters
Depending on the size of the compressor and the size and construction of the
room in which the unit operates, the air inlet may have to be located outside
of the room. If it is necessary to remotely install the air filter, make the inlet
piping as short and direct as possible. Remotely installed air filters can lead
to vibrations in the inlet piping. These vibrations can be minimized by adding
a pulsation dampener in the inlet piping between the remote inlet filter(s)
and the compressor.
WARNING !
WARNING !
WARNING !
CAUTION !