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I N N O V A T I V E C O M P R E S S E D A I R S O L U T I O N S COMPRESSED AIR SOLUTIONS TM

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RSNC Series

NON-CYCLING REFRIGERATED AIR DRYERS

200-800 scfm

• Stainless Steel Heat Exchanger• Low Pressure Drop• Efficient Operation

CMEI n s i d eTM

Technological Innovation.Efficient Operation…

Refrigeration ComponentsSized Specifically For Each

Dryer Model

Refrigeration SystemSuction Pressure Gauge

Z-TrolTM Electronic Digital Controller(Optional on 200-400 NCG)

Powder-Coated Exterior

CFXTM Exchanger Technology

Centrifugal CondensateSeparator

Timed Electric Solenoid Drain

Typical Configuration Depicted

U.S. Patent No. 6,186,223and No. 6,244,333

NC SeriesNC SeriesNON-CYCLING REFRIGERATED AIR DRYERS

Z-Trol ™

Air Treatment Controller

NC Series non-cycling refrigerated dryers from ZEKS are built around our exclusive CFXTM exchanger technology - developed specifically for compressed air treatment. This innovative technology uses less energy to dry compressed air, resulting in lower operatingcost. CFXTM technology limits pressure drop to 3.0 psi, or less,saving compressed air energy cost over most competitive non-cycling dryers.

NC Series dryers incorporate a refrigeration system that is used to cool compressed air that is directed through the dryer.This cooling causes moisture and contaminants that are in theair to condense, so they can be efficiently separated from theair, and then be discharged from the dryer. All NC Series dryersinclude components that are sized to meet the demands ofeach model, ensuring reliability, operating efficiency, and long service life.

NC Series non-cycling dryers are ideal for air system applicationsthat require a constant supply of compressed air that is dried to38°F (3.3°C) pressure dew point. Most air dryer manufacturersrate their equipment at 100°F (37.8°C) inlet air temperature, 100 psig inlet air pressure and 100°F (37.8°C) ambient airtemperature. Properly sized non-cycling dryers operatecontinuously, producing maximum drying potential, even when demand is low. For this reason, non-cycling dryers aremost efficient in applications where compressed air volumedemand is constant.

A d d i t i o n a l C o m p r e s s e d A i r S o l u t i o n s a n d O p t i o n sIn addition to reliable performance, and efficient, non-cyclingoperation, ZEKS dryers run quietly and require minimal floorspace. There is also an optional CMETM Cold Mist Eliminator,for 200-400 NCG models, that removes damaging compressor lubricant vapors at the lowest possible temperature. This 2-stage system provides 99% overall oil removal efficiency. The separator stage removes bulk contaminants; the coalescingfilter stage removes fine oil droplets and condensation aerosols -with very low pressure drop. There are no additionalinstallation requirements because the CMETM system iscompletely integrated within the NC Series dryer.

The Logical Choice for Non-CyclingRefrigerated DryerInstallations

E X C H A N G E R T E C H N O L O G Y

CFXE X C H A N G E R T E C H N O L O G YE X C H A N G E R T E C H N O L O G Y

™

200 NCG250 NCG300 NCG400 NCG

Multiple, optional, electrical packages, common pipe connectionsizes, and water-cooled capability allow these dryers to be easilyintegrated into your compressed air system.

NC Series dryers operate automatically, with the Z-Trol™ advancedelectronic digital controller (optional on 200-400 NCG models)providing up-to-the-second dryer operating information. It allowsdryer performance adjustment through an easy to use keypad andLCD display. Z-Trol™ provides:

• Fine Temperature Display Accuracy +/- 0.1º F• Pressure Display Accuracy +/- 0.3 psig• Chiller Temperature Display• Temperature And Pressure In English/Metric• User Adjustable Parameters• Designed And Built To Industrial Specs

With Industrial Grade Components

Z-Trol™ PLUS is the optional model of the controller that hasadditional capabilities and allows monitoring of additional dryerrefrigeration system parameters and multiple compressed air systemparameters including:

• Remote START/STOP Capability• Remote Alarm Contact• Refrigerant Discharge Pressure• Refrigerant Liquid Temperature• Refrigerant Suction Pressure• Refrigerant Suction Temperature• Ambient Temperature (Air/Water)• Inlet Air Pressure• Outlet Air Pressure• Differential Air Pressure• Inlet Air Temperature• Outlet Air Temperature

Z-Trol™ enhances dryer set-up and performance monitoring.

Count on NC Series dryers for efficientand reliable compressed air treatment.

CMECold Mist Eliminator

TM

COMPRESSED AIR SOLUTIONS TM

Standard Models certified to UL and CSA Standards. For models with optional equipment, contact factory.

NC Series Dryer SizingInlet air temperature and pressure, and ambient temperature effect an airdryer’s ability to achieve a 38°F (3.3°C) pressure dew point. NC Seriesdryers are rated in accordance with the Compressed Air and Gas Institute(CAGI) Standard for Testing and Rating Refrigerated Compressed AirDryers (ADF-100). Deviation from the rating conditions of 100°F (37.8°C)inlet air temperature, 100 psig inlet air pressure and 100°F (37.8°C)ambient air temperature affects dryer performance.

Inlet air temperature dramatically affects dryer performance. A 20°F(11.1°C) increase doubles the amount of moisture in the air stream,requiring a larger dryer and more energy to maintain the same amountof flow. Installation of an efficient aftercooler, between the air compressorand the air dryer, and locating the dryer where the inlet air temperature is lowest, will reduce dryer operating cost.

As inlet air pressure increases, the capacity of the dryer increases.Compressed air holds less water vapor at higher pressures, thereforerequiring less energy to dry. This is why it is also beneficial to locate thedryer at the highest pressure point in the compressed air system.

Follow this procedure to correctly size an NC Series dryer to meet the operating conditions in this example:Compressed Air Volume Requirement 375 scfmInlet Air Temperature 110oF (43.3oC)Inlet Air Pressure 150 psigAmbient Air Temperature 90oF (32.2oC)

ConditionInlet Air Temp. 110°F (43.3°C)Inlet Air Pressure 150 psigAmbient Air Temp. 90°F (32.2°C)

Correction Factor1.23.86.89

°F (°C)80 (27)90 (32)100 (38)110 (43)120 (49)

CorrectionFactor

.61

.791.001.231.51

The Correction Factors for the Sizing Example are:

Inlet Air Temperature

psig (bar)50 (3.4)75 (5.2)100 (6.9)150 (10.3)250 (17.2)

CorrectionFactor1.291.101.00.86.79

Inlet Air Pressure

°F (°C)80 (27)90 (32)100 (38)110 (43)120 (49)

CorrectionFactor

.80

.891.001.161.30

Ambient Air Temperature

With the correction factors selected, corrected scfm can be calculated:

1.23 x .86 x .89 x 375 scfm = 353 scfm corrected

Select a dryer that matches or exceeds the corrected scfm. For theexample given, this would be Model 400 NCG delivering 38°F(3.3°C) pressure dew point.

Correct NC Series non-cycling dryer size selection is made for anyapplication by replacing condition specifications in the examplegiven above, followed by selection of correction factors from thecharts and final calculation of the corrected scfm.

Select the correction factors from these tables that correspond closelywith the conditions at the dryer installation site:

* Performance data obtained and presented in accordance with CAGI Standard No. ADF 100, “Refrigerated Compressed Air Dryers - Methods for Testing and Rating.” Pressure dew point at 100 psig,100oF (37.8oC) inlet air, 100oF (37.8oC) ambient air with 3 psi ± .5 psi maximum pressure drop.

Pressure drop may exceed 5 psi at 50oF (10oC) PDP conditions.** Overall Dimension*** Average kilowatts per hour of dryer operation at full rated

capacity. Operating kilowatt values reflect air-cooled models.

N C S e r i e s D r y e r S p e c i f i c a t i o n sMODEL 200 NCG 250 NCG 300 NCG 400 NCG38°F/3.3°C PDP;scfm* 200 250 300 40050°F/10°C PDP; scfm* 276 345 414 550Pressure Drop 1.6 2.0 2.0 2.9Width** In 28 28 28 28Depth** In 30 30 30 30Height** In 40 40 40 40Shipping Wt. Lbs 325 340 375 375Air Connection In & Out 11/2” MPT 11/2” MPT 2” MPT 2” MPTDrain 1/4” FPT 1/4” FPT 1/4” FPT 1/4” FPTRefrigeration HP 1 1 11/2 21/2

Max. Work. Press. psig 300 300 300 300Operating kW*** 1.89 1.90 2.10 2.96Voltages 208/230-1-60 208/230-3-60 208/230-3-60 208/230-3-60

208/230-3-60 460-3-60 460-3-60 460-3-60460-3-60 575-3-60 575-3-60 575-3-60575-3-60 200-3-50 200-3-50 200-3-50200-3-50 380-3-50 380-3-50 380-3-50380-3-50 500-3-50 500-3-50 500-3-50500-3-50

MODEL 500 NCE 600 NCE 700 NCE 800 NCE38°F/3.3°C PDP;scfm* 500 600 700 80050°F/10°C PDP; scfm* 690 830 970 1100Pressure Drop 2.9 3.0 2.7 3.0Width** In 42 42 42 42Depth** In 40 40 40 40Height** In 62 62 62 62Shipping Wt. Lbs 800 930 1050 1100Air Connection In & Out 3” MPT 3” MPT 3” MPT 3” MPTDrain 1/4” FPT 1/4” FPT 1/4” FPT 1/4” FPTRefrigeration HP 21/2 3 31/2 4Max. Work. Press. psig 300 300 300 300Operating kW*** 3.85 4.82 5.07 5.65Voltages 208/230-3-60 208/230-3-60 208/230-3-60 208/230-3-60

460-3-60 460-3-60 460-3-60 460-3-60575-3-60 575-3-60 575-3-60 575-3-60220-3-50 220-3-50 220-3-50 220-3-50380-3-50 380-3-50 380-3-50 380-3-50500-3-50 500-3-50 500-3-50 500-3-50

500 NCE600 NCE700 NCE800 NCE

COMPRESSED AIR SOLUTIONS TM

ZEKS continuously develops innovative compressed air solutions for our entire line of refrigerated dryers. NC Series dryers are designed and engineered to give maximum energy efficiency and service life, through a unique combination of product design and patented construction.These innovations have resulted in a refrigerated dryer that incorporates many “Best-In-Class” features:

• Low Operating Cost - Industry-leading pressure drop of 3 psi or less

• Corrosion-Resistant, All-Welded Stainless Steel Heat Exchanger - Allows for dryer use in a broad range of operating environment conditions

• Stable and Tightly Controlled 38oF Dew Point Performance - Efficient refrigeration system and heat exchanger function

• Environmentally Friendly Refrigerant - R404A is environmentally friendly and has no legislated end-life

• Modular Construction - Well thought out placement of high quality components makes NC Series dryers easy to access and maintain

• Easy to Access and Operate Control Panel - Ergonomically placed controls allow easy operation andmonitoring of dryer functions

• Long-Term Durability - NC Series dryers are constructed with galvanized and galvalume internal panels and powder-coated outer finish, for the best in durability and appearance

• Warranty Plus - CFX™- equipped NC Series dryers come with the standard ZEKS Refrigerated Dryer Warranty Plus a 10-year parts warranty on heat exchangers *

• *See ZEKS’ Warranty Policy for complete warranty details.

NC Series

Best-In-Class

A pressure drop difference of 4 psi, in a 200 horsepower compressed air system, results in an annual operating cost

difference of $1,671 at $.07/kWh.*

*Based on 1% loss of compressor efficiency due to 2 psi pressure drop and 8,000 operating hours per year.

0 1 2 3 4 5 6 7 8 9

ZEKS’ NC Series Dryer

Competitor’s Dryer

PRESSURE DROP (PSI)

T h e C F X™ I n n o v a t i o n

ZEKS’ E and G Series NC Series non-cycling dryers are built around our unique CFXTM heat exchangers that have high heat transfer at low pressure drop because of short flow length. Flow area that is 3 – 5 times that of the equivalent copper tube exchanger and self-cleaning action contribute to low pressure drop and low fouling potential. This revolutionary technology uses less energy to dry air, resulting in loweroperating cost. All-welded stainless steel CFXTM heat exchangers can be used in many applications where copper or other metals are not suitable.

NC SeriesNC SeriesNON-CYCLINGS

REFRIGERATED AIR DRYERS1302 Goshen Parkway, West Chester, PA 19380

Phone: 610-692-9100 800-888-2323 Fax: 610-692-9192www.zeks.com

© 2002, ZEKS Compressed Air Solutions Form: NC 200-800-0802-3M-DBO

Printed in USA

Specifications, illustrative materials and descriptions contained herein were as accurate as known at the time this publication was approved forprinting. The company reserves the right to change specifications, discontinue models, equipment or design without notice and without incurringobligation. The information set out in this brochure is for preliminary information only and is not intended to constitute any representation orwarranty by ZEKS to potential customers or to form the basis of a contract with any customer.

Contact ZEKS or your local ZEKS Distributor for detailedinformation about NC Series non-cycling air dryers.

General Arrangement200-400 NCG

General Arrangement500-800 NCE