QUINCY QPCD SERIES | CYCLING

QUINCY QPNC SERIES | NON-CYCLING

REFR IGERATED AIR DRYERS

QPCD — CYCLING DRYER, QPNC — NON-CYCLING

• Cycling and Non Cycling designs for

maximum system efficiency

• Balanced refrigeration control systems

provide reliable and consistent per-

formance

• 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 com-

ponents

• UL and cUL standard all units up to

2000 cfm, optional on larger units

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The Science of Compressed Air

CYCLING AND NON-CYCLING DRYERS

kW vs. Load500 cfm @ 100 psig

Heatless Desiccant

% load0 25 50 75 100

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4.0kWD

raw

Non-Cycling Refrigerated

Cycling Refrigerated

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Quincy refrigerated air dryers purify compressed air by chill-ing the air to approximately +39°F. The lower compressedair temperatures cause entrained moisture to condense. Thecondensed moisture carries airborne dirt and oil to theseparator where it is removed from the air stream by an auto-matic drain.

Plant equipment will run better and processes more efficientlywhen operated with clean compressed air. Pay back startsimmediately upon startup.

To customize the total air system for optimum efficiency,Quincy provides both Cycling and Non-Cycling refrigeratedair dryers. Cycling dryers are of particular interest for largersystems with fluctuating loads, whereas Non-Cycling dryersare typically best suited for smaller systems or systemsexpecting fairly constant loads. Either way, one need not lookany further than Quincy for time-proven and reliable com-pressed air dryers.

70˚ 60˚ 50˚ 40˚ 35˚ 32˚

Pressure Dew Point Temperature ˚F

Dew Point vs. PPM

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.98

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1.9

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REFR IGERATED AIR DRYERS

QPNC — NON-CYCLING OPERATION

Non-Cycling Flow schematic.

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Quincy Non-Cycling Direct Expansion dryersuse a two-stage heat exchanger system to main-tain consistent dew points. Freeze-ups are pre-vented and optimum performance is maintainedby integrating the highest quality componentsand refrigeration control valves into our system.Only the most reliable and efficient aluminum,stainless-steel and copper materials are selectedfor our premium heat exchanger.

10-250 cfm QPNC dryers employ an internalElectronic No Loss condensate drain. All autodrain functions and displays for 325 cfm andlarger dryers are controlled by the panel mount-ed microprocessor.

Wet compressed air enters the integral 1st stageair-to-air heat exchanger where it is precooledby the cold air returning from the integral evap-orator. Precooling saves energy by reducing theheat load on the refrigeration system.

After the air has been precooled, it flows intothe air-to-refrigerant evaporator where its tem-perature is reduced to +39˚F. This temperaturereduction forces entrained moisture to con-dense. The mixture of condensed liquids andcold air then flow into the moisture separatorwhere the liquids are collected in the sump andremoved by an automatic drain.

After liquids have been removed, the cold drycompressed air returns through the cold side ofthe 1st stage heat exchanger where it is reheatedby the warm incoming air. Pipe sweating isavoided and air volume is increased by reheat-ing.

The compressed air is now considered treatedand ready for delivery to the system.

1 Compressor 8 Refrigerant Filter Dryer

2 Condenser 9 Hot Gas Bypass Valve

3 Cooling Fan 10 Air to Air HX

4 Air to Refrigerant HX 11 Suction Pressure Gauge

5 Separator 12 Low Ambient Fan Cycling Control

6 Impurity Trap 13 Condensate No Loss Drain

7 Expansion Device

Non-Cycling Dryer Operations:

QPCD — CYCLING DRYER OPERATION

The Science of Compressed Air

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Quincy Chilled Mass Cycling Dryers save energy by cyclingthe refrigeration system On & Off in response to demand. Athree-stage heat exchanger system is employed to providethe cold storage necessary for cycling operation. Dual ther-mostats ensure proper cycling at all load conditions, providetight dew point control, and prevent freeze ups. The 1st

thermostat signals the refrigeration compressor to cycle onand off in direct response to the coldest air temperature exitingthe evaporator. In order to prevent freeze ups during noload conditions, a 2nd thermostat, set a few degrees lower,signals the refrigeration compressor to cycle on and off inresponse to the chilled mass temperature.

Contaminated compressed air flows into shell side of the1st stage air-to-air heat exchanger where it is precooled bythe cold air returning through the tubes from the chilledmass heat exchanger. Precooling saves energy by reducing theheat load on the evaporator.

The precooled compressed air is then directed into the 2nd

stage, air-to-chilled mass heat exchanger, where its tempera-ture is lowered to approximately +35˚F by the chilled mass

flowing through the tube side from the 3rd stage, refrigerant-to-chilled mass, heat exchanger. The dew point temperatureis held within its optimum performance range by the micro-processor.

The compressed air flows into the moisture separator where thecondensed liquids are removed by centrifugal action andsent to the sump for disposal through the microprocessor con-trolled drain.

After the liquids have been removed, the compressed air returnsthrough the tube side of the 1st stage heat exchanger where itis reheated by the warm incoming air.

The chilled mass circulates through the 3rd stage evaporatorshell where its heat is removed by cold liquid refrigerantflowing through the tubes from the refrigeration system.When the Microprocessor reads the low set point from thethermostats, it turns the refrigeration compressor off.When the compressor is off, no energy is used. When themicroprocessor senses the upper set point it turns thecompressor on.

Cycling Flow Schematic.

Cycling DryerOperations:1 Air in

2 Precooler

3 Chiller

4 Moisture separator

5 Air out

6 Refrigeration system

7 Evaporator

8 Pump

9 Reservoir

10 Auto drain

1

2

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5

6 7

8 10

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REFR IGERATED AIR DRYERS

CONTROLS

Standard controls provided on Quincy Non-Cycling dryers, 10-250 cfm include: a refrigerantanalyzer gauge, Electronic No Loss drain, on/offswitch and a general purpose alarm light wiredto the compressor overload circuit.

Quincy’s microprocessor-based Digital MasterControl is standard on all refrigerated air dryersover 250 cfm. The Master Control regulatesdrain adjustment, operation, and provides oper-ational displays.

• Run light• Alarm Indicator light• Analyzer Gauge

• System Schematic• Stop / Start Switch with lock out

CONTROL PANEL 10–250 CFM

CONTROL PANEL 325+ CFM

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

CYCLING CONTROL PANEL

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

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Heat Exchanger quality and design determine overall performance andintegrity. Quincy’s premium heat exchanger design, materials, and constructionensure maximum reliability and efficiency. To ensure the removal of all con-densed liquids and to minimize pressure drop, Quincy high efficiency heatexchangers are paired with either our unique Five Step Centrifugal MoistureSeparator 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)

HEAT EXCHANGERS & MOISTURE SEPARATORS

All refrigerated dryers 325 cfm and larger have micro-processor controlled drains. The drain open time and cycletime are fully adjustable and the settings can be locked into avoid tampering. Dryers 10 - 250 cfm are equippedwith Electronic No Loss drains.

DRAIN SYSTEMS

The Science of Compressed Air

ADDITIONAL DESIGN ELEMENTS

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REFR IGERATED AIR DRYERS

Capacity 745 cfmInlet Pressure 120 psigInlet Air Temp. 90˚FAmbient Temp. 100˚FDew Point 39˚F

CORRECTION FACTORS

Dryer Required = cfm required(A) x (B) x (C) x (D)

= 745(1.03) x (1.21) x (1) x (1)

= 598 cfm dryer required

Select QPCD 600 for this application

Example One: CalculationsExample One: ConditionsRequirement

A psi 60 80 100 120 140 150 180 200Factor 0.83 0.94 1 1.03 1.05 1.08 1.09 1.11

Inlet Pressure 120 psigInlet Air Temp. 110˚FAmbient Temp. 90˚FDew Point 39˚F

Corrected Capacity = Std. Capacity x (A) x (B) x (C) x (D)

= 1000 x (1.03) x (1.07) x (.84) x (1)

= 926 cfm

Example Two: CalculationsExample Two: ConditionsQPCD 1000 Corrected Flow for:

QPCD 250 250 425 460/3/60 2 3.536 150 4.2 17000 39 31 46 600 11⁄2 1⁄2QPCD 325 325 552 460/3/60 2 3.536 150 4.5 28600 39 31 44 700 2 1⁄2QPCD 400 400 680 460/3/60 3 4.094 150 2 36435 53 33 45 850 2 1⁄2QPCD 500 500 850 460/3/60 3 4.094 150 2.8 37400 53 33 45 900 2 1⁄2QPCD 600 600 1020 460/3/60 4 4.534 150 2.4 43180 53 33 45 1100 3 3⁄4QPCD 750 750 1274 460/3/60 5 6.417 150 2.8 63800 72 42 58 1200 3 3⁄4QPCD 1000 1000 1699 460/3/60 5 6.544 150 4.1 64900 72 42 58 1500 3 3⁄4QPCD 1200 1200 2039 460/3/60 71⁄2 7.711 150 3.3 78000 72 42 63 1700 4 FL 1QPCD 1500 1500 2549 460/3/60 71⁄2 7.711 150 4.1 79500 72 42 60 1800 4 FL 1QPCD 1700 1700 2889 460/3/60 10 10.95 150 3.8 114000 72 42 60 2100 4 FL 1QPCD 2000 2000 3398 460/3/60 10 10.95 150 4.4 116000 72 42 60 2500 4 FL 1QPCD 2500 2500 4248 460/3/60 15 15.776 150 4.3 169200 115 60 64 3500 6 FL 11⁄2QPCD 3200 3200 5437 460/3/60 20 17.706 150 4.5 192000 125 68 91 4200 6 FL 2 in*QPCD 4000 4000 6796 460/3/60 25 23.706 150 4.5 305000 150 75 95 6900 8 FL 2 FL

Notes: Capacity in accordance with recommended NFPA standards and CAGI standard ADF 100. Ratings based on100˚F Inlet temperature, 100 psig inlet pressure, and 100˚F max ambient.

kW inputs are shown for air-cooled models including fan motors. Water-cooled models are approx. 8% less.

Heat rejection figures are approximate.

QPCD — SPECIFICATIONS & ENGINEERING DATA

CyclingFull Heat Dimensions Connections

cfm @ m3/hr Stnd Ref Load Max Nominal Rejection L W H Approx Air WaterModel 100 psig 7 bar Electrics hp kW psig ∆P BTU/Hr. In. In. In. Wt. lb. In.

Inlet Air Pressure Correction

B Temp.˚F 80 90 100 110 120Factor 1.5 1.21 1 0.84 0.69

Inlet Air Temperature Correction

C Temp.˚F 80 90 100 110Factor 1.15 1.07 1.00 0.91

Ambient Air Temperature Correction

D Temp. ˚F 37–39˚F 45–50˚FFactor 1 1.2

Dew Point Correction

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The Science of Compressed Air

CORRECTION FACTORS

QPNC 10 10 17 115/1/60 0.152 2.4 n/a 232 1.45 2700 21 14 20 57 1⁄2 n/aQPNC 15 15 25 115/1/60 0.188 3 n/a 232 2.18 2780 21 14 20 59 1⁄2 n/aQPNC 25 25 42 115/1/60 0.258 4 n/a 232 2.9 3500 21 14 20 70 1⁄2 n/aQPNC 35 35 59 115/1/60 0.318 5.2 n/a 232 2.9 4650 21 14 20 75 1⁄2 n/aQPNC 50 50 85 115/1/60 0.359 5.9 n/a 232 2.9 6800 21 14 20 75 1⁄2 n/aQPNC 75 75 127 115/1/60 0.734 9.8 n/a 203 2.9 6950 21 15 31 113 1 n/aQPNC 100 100 170 115/1/60 0.854 12 n/a 203 2.18 10400 23 19 32 135 11⁄2 n/aQPNC 125 125 212 115/1/60 1.031 14.2 n/a 203 2.9 10500 23 19 32 150 11⁄2 n/aQPNC 150 150 255 230/1/60 1.49 10 n/a 203 1.45 10600 24 23 36 198 11⁄2 n/aQPNC 200 200 340 230/1/60 1.629 11.5 n/a 203 2.9 14000 24 23 36 200 11⁄2 n/aQPNC 250 250 425 460/3/60 2.365 11.8 n/a 203 3.6 21000 24 23 36 200 11⁄2 n/aQPNC 325 325 552 460/3/60 2.2 5.4 11.4 150 4.5 28600 39 31 44 700 2 1⁄2QPNC 400 400 680 460/3/60 2.8 4.3 7.9 150 2 36435 53 33 45 850 2 1⁄2QPNC 500 500 850 460/3/60 4.6 5.4 11.4 150 2.8 37400 53 33 45 900 2 1⁄2QPNC 600 600 1020 460/3/60 4.6 6.4 12.1 150 2.4 43180 53 33 45 1100 3 3⁄4QPNC 750 750 1274 460/3/60 5.25 6.8 15.7 150 2.8 63800 72 42 58 1200 3 3⁄4QPNC 1000 1000 1699 460/3/60 6.5 8.6 18.6 150 4.1 64900 72 42 58 1500 3 3⁄4QPNC 1200 1200 2039 460/3/60 6.5 11.1 22.1 150 3.3 78000 72 42 63 1700 4 FL 1QPNC 1500 1500 2549 460/3/60 9.6 10.7 24.7 150 4.1 79500 72 42 63 1800 4 FL 1QPNC 1700 1700 2889 460/3/60 9.6 10.7 24.7 150 3.6 114000 72 42 63 2100 4 FL 1QPNC 2000 2000 3398 460/3/60 10.5 27 54.0 150 4.4 116000 72 42 63 2500 4 FL 1QPNC 2500 2500 4248 460/3/60 14.5 30 64.0 150 4.3 169200 115 60 64 3500 6 FL 11⁄2QPNC 3200 3200 5437 460/3/60 15.4 36 70.0 150 4.5 192000 125 68 91 4200 6 FL 2 & 11⁄2QPNC 4000 4000 6791 460/3/60 20.2 33 66.0 150 4.5 305000 150 75 95 6900 8 FL 2 FL

Notes: Capacity in accordance with recommended NFPA standards and CAGI standard ADF 100. Ratings based on100°F Inlet temperature, 100 psig inlet pressure and 100°F max ambient.

kW inputs are shown for air cooled models including fan motors. Water cooled models are approx. 8% less.

Heat rejection figures are approximate.

QPNC — SPECIFICATIONS & ENGINEERING DATA

Non-CyclingStandard Electrics 230-3-60 Dimensions Approx Connections

cfm @ m3/hr Volts/Phase Full Load Full Load Full Load Max Nominal Heat Rejection L W H Shipping Air WaterModel 100 psig 7 bar Hertz kW Amps Amps psig ∆P BTU/Hr. In. In. In. Wt. lb. In.

Temp.˚F 37–39˚F 45–50˚FQPNC 10 - 250 Factor 1 1.12QPNC 325 - 4000 Factor 1 1.2

Dew Point Correction

Capacity 480 cfmInlet Pressure 120 psigInlet Air Temp. 90˚FAmbient Temp. 100˚FDew Point 39˚F

Dryer Required = cfm required(A) x (B) x (C) x (D)

= 480(1.03) x (1.21) x (1) x (1)

= 385 cfm dryer required

Select QPNC 400 for this application

Example One: CalculationsExample One: ConditionsRequirement

Inlet Pressure 120 psigInlet Air Temp. 110˚FAmbient Temp. 90˚FDew Point 39˚F

Corrected Capacity = Std. Capacity x (A) x (B) x (C) x (D)

= 500 x (1.03) x (1.07) x (.84) x (1)

= 463 cfm

Example Two: CalculationsExample Two: ConditionsQPNC 500 Corrected Flow for:

QPNC-25 Non-Cycl ing Dryer

D

Temp.˚F 80 90 100 110QPNC 10 - 250 Factor 1.12 1.03 1 0.92QPNC 325 - 4000 Factor 1.15 1.07 1 0.91

Ambient Air Temperature Correction

C

Temp.˚F 80 100 110 120QPNC 10 - 250 Factor 1.05 1 0.87 0.67QPNC 325 - 4000 Factor 1.05 1 0.84 0.69

Inlet Air Temperature Correction

B

Temp.˚F 60 80 100 120 140 150 180 200QPNC 10 - 250 Factor 0.79 0.93 1 1.03 1.07 1.09 1.12 1.14QPNC 325 - 4000 Factor 0.83 0.94 1 1.03 1.05 1.08 1.09 1.11

Inlet Air Pressure Correction

A

REFR IGERATED AIR DRYERS

Controls:Microprocessor n/a n/a n/a n/a S S S S SHot Gas Bypass Valve S S S S S S S n/a n/aThermostatic Expansion Device S S S S S S S S SHigh/Low Refrigerant Shutdown n/a n/a n/a n/a S S S S SRefrig. Dual Pressure n/a n/a n/a n/a S S S S SDual Thermostats n/a n/a n/a n/a n/a n/a n/a S S

Heat Exchangers:Two-Stage System S S S S S S S n/a n/aThree-Stage (Chiller) System n/a n/a n/a n/a n/a n/a n/a S S

Separators & Drains:High Efficiency Moisture Separator S S S S S S S S SElectronic No Loss Drain S S S S O O O O OElectronic Timer Drain n/a n/a n/a n/a S S S S S

Indicator lights:Power On S S S S n/a n/a n/a n/a n/aOF or OC Mode n/a n/a n/a n/a S S S S SAlarm S S S S S S S S SDrain On/Off n/a n/a n/a n/a S S S S SCompressor Running n/a n/a n/a n/a S S S S SService Due n/a n/a n/a n/a S S S S S

Instrumentation:Air In Temperature n/a n/a n/a n/a S S S S SAir Out Temperature n/a n/a n/a n/a O O O O OAir In Pressure n/a n/a n/a n/a O O O O OAir Out Pressure n/a n/a n/a n/a O O O O ORefrigerant Suction Temperature n/a n/a n/a n/a S S S S SChilled Media Temperature n/a n/a n/a n/a n/a n/a n/a S SRefrigeration Suction Pressure S S S S S S S S SRefrigeration Discharge Pressure n/a n/a n/a n/a O O O O O6’ Single Phase Power Cord S S S S n/a n/a n/a n/a n/a

Electrics:115-1-60 S S n/a n/a n/a n/a n/a n/a n/a230-1-60 NC NC S NC n/a n/a n/a n/a n/a230-3-60 n/a n/a n/a n/a NC S S S S460-3-60 n/a n/a n/a S S S S S S575-3-60 n/a n/a n/a n/a O O O O O200/220-3-50 n/a n/a n/a n/a O O O O O380/420-3-50 n/a n/a n/a n/a O O O O O

Nema 1 S S S S S S S S SNema 4 n/a n/a n/a n/a O O O O O

Cooling:Air S S S S S S S* S S*Water n/a n/a n/a n/a O O O** O O**

Enclosures:Powder Coated Cabinet S S S S S S O*** S O***

Filters:Particulate O O O O O O O O OCoalescer O O O O O O O O OMist Eliminator O O O O O O O O O

AVAILABLE EQUIPMENT

Available Equipment 10–50 75–125 150-200 250 325 400-1200 1500-4000 250–600 750–4000

* Optional on 4000 scfm model** Standard on 4000 scfm model*** Not available on 2500, 3200

and 4000 scfm models

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Non-Cycling Models (SCFM) Cycling Models (SCFM)

S = Standard O = Optional NC = No Charge n/a = Not Applicable

QUINCY AIR SYSTEM PRODUCTS

• Heatless, Heated Purge and Blower

Purge Desiccant Dryers• Cycling and Non-cycling

Refrigerated Dryers• Coalescer, Particulate and

Absorber Filtration• High Temperature Dryers• Climate Control Dryers (5-10, 15 cfm)

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The Science of Compressed Air

701 North Dobson Avenue | Bay Minette, AL 36507 | Phone 217.222.7700 | Fax 251.937.7182 | Email: info@quincycompressor.com

©2006 Quincy Compressor an EnPro Industries companyAll rights reserved. Litho in U.S.A. (QPRD-006 12/06)

COMPRESSED AIR SYSTEMS BEST PRACTICE