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Quincy Refregerated Air Dryer

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QUINCY QPCD SERIES | CYCLING QUINCY QPNC SERIES | NON-CYCLING

R E F R I G E R AT E D A I R D R Y E R SQPCD CYCLING DRYER, QPNC NON-CYCLING Cycling and Non Cycling designs for maximum system efficiency Balanced refrigeration control systems provide reliable and consistent performance User friendly control panels provide operation data and instrumentation Microprocessor control on all units over 250 cfm allows system versatility Application specific heat exchangers render low pressure drop and optimum performance Model specific Electronic no loss and timer drains provide positive conden sate removal R-134a and R-404a refrigerants ensure environmentally friendly operation Cold surface, closed cell insulation improves thermal efficiency Heavy gage, aesthetically pleasing powder coated cabinets protect components UL and cUL standard all units up to 2000 cfm, optional on larger units

QuincyCompressor.com2

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Made in the U.S.A.

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The Science of Compressed Air

The Science of Compressed Air

CYCL ING AND NON- CYCLIN G DRYERS

Quincy refrigerated air dryers purify compressed air by chilling the air to approximately +39F The lower compressed . air temperatures cause entrained moisture to condense. The condensed moisture carries airborne dirt and oil to the separator where it is removed from the air stream by an automatic drain. Plant equipment will run better and processes more efficiently when operated with clean compressed air. Pay back starts immediately upon startup.

To customize the total air system for optimum efficiency, Quincy provides both Cycling and Non-Cycling refrigerated air dryers. Cycling dryers are of particular interest for larger systems with fluctuating loads, whereas Non-Cycling dryers are typically best suited for smaller systems or systems expecting fairly constant loads. Either way, one need not look any further than Quincy for time-proven and reliable compressed air dryers.

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Heatless Desiccant

PPM Moisture by Weight (Thousands)

1.9 1.4 .98 .67 .57 .51 .1170 60 50 40 35 32 0

kW Draw

4.0

Non-Cycling Refrigeratedd

ling Cyc

rige Ref

rate

.01-40

Pressure Dew Point Temperature F 0 25 50 75 % load kW vs. Load 500 cfm @ 100 psig 100 Dew Point vs. PPM

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R E F R I G E R AT E D A I R D R Y E R SQPNC NON -CYCLING OPE RATIO N

Quincy Non-Cycling Direct Expansion dryers use a two-stage heat exchanger system to maintain consistent dew points. Freeze-ups are prevented and optimum performance is maintained by integrating the highest quality components and refrigeration control valves into our system. Only the most reliable and efficient aluminum, stainless-steel and copper materials are selected for our premium heat exchanger. 10-250 cfm QPNC dryers employ an internal Electronic No Loss condensate drain. All auto drain functions and displays for 325 cfm and larger dryers are controlled by the panel mounted microprocessor. Wet compressed air enters the integral 1st stage air-to-air heat exchanger where it is precooled by the cold air returning from the integral evaporator. Precooling saves energy by reducing the heat load on the refrigeration system.

After the air has been precooled, it flows into the air-to-refrigerant evaporator where its temperature is reduced to +39F This temperature . reduction forces entrained moisture to condense. The mixture of condensed liquids and cold air then flow into the moisture separator where the liquids are collected in the sump and removed by an automatic drain. After liquids have been removed, the cold dry compressed air returns through the cold side of the 1st stage heat exchanger where it is reheated by the warm incoming air. Pipe sweating is avoided and air volume is increased by reheating. The compressed air is now considered treated and ready for delivery to the system.

Non-Cycli ng Fl ow schematic .

Non-Cycling Dryer Operations:

1 Compressor 2 Condenser 3 Cooling Fan 4 Air to Refrigerant HX 5 Separator 6 Impurity Trap 7 Expansion Device

8 Refrigerant Filter Dryer 9 Hot Gas Bypass Valve 10 Air to Air HX 11 Suction Pressure Gauge 12 Low Ambient Fan Cycling Control 13 Condensate No Loss Drain

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Made in the U.S.A.

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The Science of Compressed Air

The Science of Compressed Air

QPCD CYCLING DRYER OPERATION

Quincy Chilled Mass Cycling Dryers save energy by cycling the refrigeration system On & Off in response to demand. A three-stage heat exchanger system is employed to provide the cold storage necessary for cycling operation. Dual thermostats ensure proper cycling at all load conditions, provide tight dew point control, and prevent freeze ups. The 1 st thermostat signals the refrigeration compressor to cycle on and off in direct response to the coldest air temperature exiting the evaporator. In order to prevent freeze ups during no load conditions, a 2nd thermostat, set a few degrees lower, signals the refrigeration compressor to cycle on and off in response to the chilled mass temperature. Contaminated compressed air flows into shell side of the 1st stage air-to-air heat exchanger where it is precooled by the cold air returning through the tubes from the chilled mass heat exchanger. Precooling saves energy by reducing the heat load on the evaporator. The precooled compressed air is then directed into the 2nd stage, air-to-chilled mass heat exchanger, where its temperature is lowered to approximately +35F by the chilled mass

flowing through the tube side from the 3rd stage, refrigerantto-chilled mass, heat exchanger. The dew point temperature is held within its optimum performance range by the microprocessor. The compressed air flows into the moisture separator where the condensed liquids are removed by centrifugal action and sent to the sump for disposal through the microprocessor controlled drain. After the liquids have been removed, the compressed air returns through the tube side of the 1st stage heat exchanger where it is reheated by the warm incoming air. The chilled mass circulates through the 3rd stage evaporator shell where its heat is removed by cold liquid refrigerant flowing through the tubes from the refrigeration system. When the Microprocessor reads the low set point from the thermostats, it turns the refrigeration compressor off. When the compressor is off, no energy is used. When the microprocessor senses the upper set point it turns the compressor on.

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2

Cycling Flow Sche matic.

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3 4

Cycling Dryer Operations:9 1 2 8 10 3 4 5 6 6 7 7 8 9 10

Air in Precooler Chiller Moisture separator Air out Refrigeration system Evaporator Pump Reservoir Auto drain

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R E F R I G E R AT E D A I R D R Y E R SCONTROLS Standard controls provided on Quincy NonCycling dryers, 10-250 cfm include: a refrigerant analyzer gauge, Electronic No Loss drain, on/off switch and a general purpose alarm light wired to the compressor overload circuit. Quincys microprocessor-based Digital Master Control is standard on all refrigerated air dryers over 250 cfm. The Master Control regulates drain adjustment, operation, and provides operational displays.

CONTROL PANEL 1025 0 CFM

Run light Alarm Indicator light Analyzer Gauge

System Schematic Stop / Start Switch with lock out

CONTR OL PANEL 325+ CFM

Inlet Air Temperature Refrigerant Suction Temperature Ambient Temperature Fahrenheit or Centigrade Alarm Indicator Compressor Running Indicator Service Due Indicator

CYCLING CONTROL PANEL

Inlet Air Temperature Chilled Media Temperature Ambient Temperature Fahrenheit or Centigrade Alarm Indicator Compressor Running Indicator Service Due Indicator

QuincyCompressor.com6

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Made in the U.S.A.

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The Science of Compressed Air

The Science of Compressed Air

ADDITIONAL DESIGN ELEMENTSH EAT EXCH ANGERS & MOISTURE SEPARATO RS

Heat Exchanger quality and design determine overall performance and integrity. Quincys premium heat exchanger design, materials, and construction ensure maximum reliability and efficiency. To ensure the removal of all condensed liquids and to minimize pressure drop, Quincy high efficiency heat exchangers are paired with either our unique Five Step Centrifugal Moisture Separator or with an integral moisture separator.

Application-specific design for low pressure drop and optimum performance Aluminum Block ( QPNC 75 - QPNC 250) Brazed Plate (QPNC 10 - QPNC 50 & QPNC 325 - QPNC 1000) Smooth Wall Tube and Shell (all cycling and 1200 - 4000 QPNC) Integrated Moisture Separator (75 - 250 cfm) Integrated Air to Air Heat Exchanger (10 - 250 cfm)

D RAIN SYST EMS

All refrigerated dryers 325 cfm and larger have microprocessor controlled drains. The drain open time and cycle time are fully adjustable and the settings can be locked in to avoid tampering. Dryers 10 - 250 cfm are equipped with Electronic No Loss drains.

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R E F R I G E R AT E D A I R D R Y E R SQ P C D S P E C I F I C AT I O N S & E N G I N E E R I N G D ATACyclingModel cfm @ 100 psig m3/hr 7 bar Stnd Electrics Ref hp

Full Load kW

Max psig

Heat Nominal Rejection P BTU/Hr.

L In.

Dimensions W H In. In.

Approx Wt. lb.

Connections Air Water In.1 112 2 1 2 2 1 2 2 1 2 2 3 3 4 3 3 4 3 3 4 4 FL 1 4 FL 1 4 FL 1 4 FL 1 6 FL 112 6 FL 2 in* 8 FL 2 FL

QPCD QPCD QPCD QPCD QPCD QPCD QPCD QPCD QPCD QPCD QPCD QPCD QPCD QPCD

250 325 400 500 600 750 1000 1200 1500 1700 2000 2500 3200 4000

250 325 400 500 600 750 1000 1200 1500 1700 2000 2500 3200 4000

425 552 680 850 1020 1274 1

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