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™
QSD Series
Oil-Free Rotary Screw Air Compressor
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. 65040-AB
January 2001 Edition
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TABLE OF CONTENTS Standard Warranty...................................................................................................................................................... 3 Dimensional Data ....................................................................................................................................................4-5 Section I Safety Precautions ..................................................................................................................
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TABLE OF CONTENTS Section V - Maintenance or Service Preparation Preparing for Maintenance or Service...................................................................................................................... 24 Section VI - Servicing Safety ........................................................................................................................................................................ 26 Fluid Specifications ......................................................
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Standard Warranty Quincy Compressor Division Industrial Screw Products ™ - Rotary Screw Air Compressors QSD Seller warrants products of its own manufacture against Seller’s sole obligation on this warranty shall be, at its defects in workmanship and materials under normal use option, to repair, replace or refund the purchase price of and service, as follows: any product or part thereof which proves to be defective. If requested by Seller, such product or part thereof must be promptly returned t
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DIMENSIONAL DATA (air-cooled) ® 4 Quincy Compressor - QSD™ QSD AIR-COOLED WEIGHT DATA WEIGHT HP (LBS.) 50 0 430 75 100
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DIMENSIONAL DATA (water-cooled) ® Quincy Compressor - QSD™ 5 QSD WATER-COOLED WEIGHT DATA WEIGHT HP (LBS.) 50 0 450 70 5 475 10 00 500
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Section I - General Safety Precautions Never use plastic pipe, rubber hose, or soldered joints in any part of the compressed air system. Safety Alert Symbols Failure to ensure system compatibility with Serial/Model Identification Plate compressor piping is dangerous. Spare Parts Ordering Information Never use a flammable or toxic solvent for cleaning the air filter or any parts. Safety Precautions Do not remove any guards or cabinet panels or attempt to service any compressor part
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Section I - General Safety Alert Symbols Serial/Model Identification Plate IMPORTANT! Throughout this manual we have identified key hazards. The following symbols identify the level of hazard seriousness: ! DANGER Immediate hazards which will result in severe personal injury or death. Reference to the machine MODEL, SERIAL NUMBER and DATE OF ORIGINAL START-UP must be made in all communication relative to parts orders or warranty claim. A model/serial number plate is located on the ! WARN
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Section II - Description MODEL IDENTIFICATION ® 8 Quincy Compressor - QSD™
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Section II - Description General Description The Compression Cycle and Air Flow The Compression Cycle ™ The compression cycle of the two-stage QSD rotary Cooling System compressor is a continuous process from the intake of Lubricating Fluid System stage one to the discharge of stage two. Each stage Moisture Separator consists of two rotors in constant mesh, housed in a Capacity Control System cylinder with two parallel adjoining bores. Each male Electrical System rotor has lobes
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Section II - Description Cooling System The stage two cooler cools the water/glycol (70/30) mixture which is circulated through the fluid cooler and the jackets of the compressor stages. Water-cooled ™ The third cooling process takes place in the aftercooler The QSD water-cooled cooling system is divided into which cools the discharge air from stage two, which then two parallel circuits. passes through a moisture separator/trap assembly before entering the distribution system. The coolant flows
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Section II - Description Capacity Control System This vacuum creates a reverse pressure differential across the bearing seals, causing the bearing fluid to migrate ™ toward the compression chamber when the machine is The standard method of capacity control for the QSD unloaded. oil-free compressor is Continuous Run with load/no-load. ™ ® The QSD incorporates patented Power$ync lift valves The Continuous Run Mode of operation is ideal for a on both stages of compression. The valves, one per comp
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Section II - Description ™ The Power$ync II controller allows the customer to Electrical System select Auto Dual as an alternate control method. Auto Dual incorporates a timer which will turn the compressor A diagram of the electrical system is shown in the parts off if it remains in the unloaded condition for a preset manual shipped with the compressor. A wiring diagram length of time. If the system pressure remains above the is also included in the control panel of all Quincy preset pressur
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Section II - Description Back-up Control Shutdown Conditions ™ ™ The QSD Power$ync II controller is supplied with a NOTE back-up control for emergency operations if the If one of the following conditions occurs at any electronic control is inoperative. The Back-up Mode is a time the unit will immediately shutdown. The unit simplified system of operations and is not intended for should not be restarted until the problem has been long-term operation. When Back-up Mode is selected all corrected.
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Section II - Description Safety Sensors Indicators Four (4) high air temperature RTD’s are standard on Main Power on Light ™ QSD units. These protect the unit by sensing unusually high temperatures and shutting the unit down. Indicates when power from the main disconnect switch ™ Power$ync II monitors the following areas for high air has been turned on and there is live power at the temperature conditions: compressor starter and control panel. This light will remain on as long as there is powe
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Section II - Description Fluid Filter Change Light Low Lube Light Indicates excessive pressure differential across the fluid This indicator signals that the compressor has shutdown filter. It is used to determine fluid filter change intervals. due to low fluid pressure. NOTE NOTE There is no indication of fluid filter change on There is no indication of low fluid pressure on the control panel in Back-up Mode. the control panel in Back-up Mode. There is no indication if the coolant flow switch i
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Section III - Installation Receiving Moving the Unit to the Installation Site Moving the Unit to the Installation Site When a forklift is used to move the unit to its installation Location site, use forklift slots provided in the side or end of the Piping Connections main frame. Use of chains and slings should be limited Manual Shutoff Valves to the main frame. Do not attempt to lift the unit by Relief Valves attachment to any components. Electrical Guards Water and Sewer Fac
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Section III - Installation ™ Quincy QSD models are essentially vibration free; ! CAUTION 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 This compressor should not be operated in only lag bolts to secure the unit. Do not pull the bolts temperatures below 40°F or above 110°F. down tight as this may, under certain circumstances, place the frame in a twist or bind causing ev
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Section III - Installation Piping Fit-up Pressure Relief Valves Care must be taken to avoid assembling the piping in a Pressure relief valves are strain with the compressor. Piping should line up without sized to protect the system. having to be sprung or twisted into position. Adequate Never change the pressure expansion loops or bends should be installed to prevent setting or tamper with the undue stress at the compressor resulting from the changes valve. Only the relief valve between hot a
