Eng Manual DES 7-23 - Bid on Equipment files/Series_2000_Engineering...2-2 SERIES 2000 Dehumidifiers...

DesiccantDehumidifiers

SATS

The

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EngineeringManual

DESICAiR®

750 to 12,000 Scfm

Dry Desiccant DehumidificationSystems For Humidity Control

Founded in 1947, STULZ acquired Air TechnologySystems (ATS) in March 2001, naming the newcompany Stulz Air Technology Systems, Inc. (SATS).SATS is dedicated to providing innovative solutions forcritical temperature and humidity control needs. SATSdesigns and manufactures specialized environmentalcontrol equipment for commercial, industrial andcustom military applications. SATS serves a diversemarketplace - including telecommunications, informa-tion technology, medical, financial, educational, indus-trial process and government contracts - utilizingworld-class "island" manufacturing processes in amodern, 150,000 ft2 facility. The addition of SATS tothe STULZ family of companies solidifies STULZ as aglobal leader in the precision air conditioning market-place. SATS combines a global network of sales andservice companies with an extensive factory engineer-ing staff and highly flexible manufacturing resourcesdedicated to providing world-class quality, innovationand customer service.

ISO-9001 Quality RegisteredSATS operates in an ISO-9001:2000 Registered QualityManagement System. Each employee of SATS iscommitted to satisfying our customer expectations withthe highest level of consistent, measurable andcontinuous quality improvement.

SATS DESICAiR®- DRY DESICCANTDEHUMIDIFICATIONSATS DESICAiR® dehumidifiers utilize a unique dryand stable desiccant. The desiccant is a synthesizedsilica gel that is permanently encapsulated in the rotor’smolecular matrix. DESICAiR® dehumidifiers provideprecise humidity and/or temperature control of eithera room or a process air stream such as may be re-quired for pharmaceutical air preparation, tabletting,panning, etc; air conveying of hygroscopic products;preparation, hardening and packaging of confection-ery, chocolate, candy; plastic molding operations; elec-tronics manufacturing, warehousing; archival storageof documents, films, artifacts or works of art; seed stor-age; investment casting operations; stand by readinessof military hardware; battery manufacturing; generalmanufacturing; water remediation and many other ap-plications.

DESICAiR® dehumidifiers are available in sizesfrom 50 to 15,000 scfm and with moisture removalcapacities exceeding 500 Ibs per hour.

Stulz Air Technology Systems, Inc. (SATS)

DESICAiR® Series DEZ 1000 and Series DES 2000dehumidifiers provide dry air for humidity controlwith many standard options.

DESICAiR® DHP Series systems combinedesiccant dehumidification with cooling,heating, humidifying, filtration and many othercustom features such as double wallconstruction. This series facilitates singlesource, stand alone environmental control.

Product ReliabilityEach desiccant rotor is precision manufactured forlong life and low maintenance requirements anddriven by a positive grip synchronous drive belt.Each DESICAiR® dehumidifier must pass stringentquality assurance testing before leaving ourfactory. SATS offers the industry’s only 5 year rotorprotection warranty as a standard!

Typical applications include:

PROCESSESPlastic Injection MoldingPharmaceutical Tabletting/ CapsulingElectronics ManufacturingCandy ProductionPackaging Operations

ENVIRONMENTALWarehouse & Storage FacilitiesMuseumsDocument ArchivesMilitary Equipment PreservationLaboratories & Clean RoomsPneumatic Conveying (Grain Elevators)Water Remediation

PERFECT FOR FLOOD DAMAGE RESTORATION!

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Table of ContentsSECTION - 1

Introduction to SATS ........................................1-1Table of Contents .............................................1-2

SECTION - 2

DESICAiR® SYSTEMS:How it Works ....................................................2-1DES Dehumidifier Advantages ......................2-2/8Performance Curves ................................... 2-9/11Model Nomenclature ......................................2-12

SECTION - 3

SELECTED FEATURES:Standard/Optional Features ..........................3-1/4

SECTION - 4

GUIDE SPECIFICATIONS:Guide Specifications ......................................4-1/6

SECTION - 5

PERFORMANCE/DIMENSIONALSPECIFICATIONS:

Performance Ratings .......................................5-1Electrical Specifications....................................5-2Dimensional Data DES-( )-55 ........................5-3/4Dimensional Data DES-( )-77 ........................5-5/6Dimensional Data DES-( )-106 ......................5-7/8Dimensional Data DES-( )-122 .................... 5-9/10Dimensional Data DES-( )-152 .................. 5-11/12

SECTION - 6

ADDITIONAL INFORMATION:

Duct Mounted Accessories ...............................6-1

1-2

DESICAiR® FAMILY OF PRODUCTS

DH 50/100 Series

DRY 500 Series

DEZ 1000 Series

DES 2000 Series

DHS Series

DHP Series

1

PROCESS AIR IN

2

34

PROCESS AIR OUT

9

REACTIVATION AIR IN

5

REACTIVATION AIR OUT

8

67

2-1

Desiccant Dehumidification - How It Works

How it Works ...Humid (process) air (1) is drawn into the dehumidifierthrough a filter (2) and a specially designed plenum.The air passes through the rotor (3) where moisture isadsorbed by the desiccant.

As moisture is adsorbed by the desiccant, heat isgiven off to the air stream. This heat gain causes thedry bulb temperature of the air stream to increase.The dehumidified air passes through a second ple-num and is discharged (4) by the process air blower.

The reactivation air (5) is drawn through a filter (6),heated (7) and enters the rotor through the insulatedplenum. Heating the air reduces the relative humidityof the reactivation air and increases its moistureholding capacity. The reactivation air also heats thedesiccant, reducing its moisture holding capacity anddelivers the necessary heat of vaporization to drivethe moisture from the desiccant in vapor form. As thisprocess continues, the reactivation air dry bulbtemperature is reduced due to the conversion ofmoisture to vapor. The reactivation air passes throughanother plenum

and is discharged (8) by the reactivation air blower.

The plenums are constructed to keep the process andreactivation air streams from mixing.

While the dehumidifier is operating, the rotor iscontinuously turned by the drive motor and belt (9).The moisture adsorbed from the process air stream iscarried to the reactivation zone where the moisture istransferred to the reactivation air stream.

The air streams pass concurrently through the rotor ina counterflow air pattern. The process and reactiva-tion air streams follow separate and isolated pathsthrough the dehumidifier. They are prevented frommixing by four significant design features:

• Entering through isolated plenums.• Solid rotor flute construction.• Unique process to reactivation face seals.• Double peripheral seals on each face.

DESICAiR® Series 2000 Desiccant Dehumidifier

2-2

SERIES 2000 Dehumidifiers

The Series 2000 models are industrial duty dry desiccant dehumidifiers. They dehumidify a space or processapplication to a humidity level chosen by the user without lowering the air temperature. Using desiccant airdrying technology, humidity can be reduced to levels below that which is achievable with arefrigeration based dehumidification system. Capacity range is from 750 through 12,000scfm.

The Series 2000 dehumidifiers even allow cold air streams to be dehumidi-fied without further reducing the air temperature, so freezing and/or frost-ing of components is prevented. Air to be dehumidified is drawn into theunit, filtered, dehumidified and then supplied to the space or process to beconditioned. Each dehumidifier is complete with all the necessary blowers,controls, filters and drive components to assure the safe and automaticoperation of the unit. Single point electrical power connection is provided.

SERIES 2000 Systems Offer Outstanding Advantages

Flexibility/Versatility• Space or Process Conditioning

A range of options to meet your needs• Electric, Gas or Steam Powered Reactivation• Round or Square Duct Connections• Status Indicator Lamps• Remote Unit Starting/Monitoring

Range of SizesA range of flow capacities to meet your space orprocess conditioning requirements from 750 to 12,000scfm.

Non-Proprietary PartsAll Series 2000 systems incorporate non-proprietarycomponents where possible. Most major HVAC,refrigeration or electrical distributors stock an exactmodel cross reference or an alternate to most factoryprovided components.

Code Conformance

• Control enclosures are certified to UL508A Stan-dards.

• Steam & Electric reactivation units may beNationally Recognized Testing Laboratories(NRTL) certified to UL1995 Standards.

• Gas reactivation units are designed toFactory Mutual guidelines.

Comprehensive WarrantyAll parts are warranted for two years from date ofinstallation.Note: Certain terms and conditions apply.

5-Year Rotor Warranty - The desiccant rotor isprotected with an exclusive SATS DESICAiR® warran-ty for five (5) years against softening or collapse dueto exposure to humid air.

Solid State ControlsPrecision humidity management with unrivaled, userfriendly controls that offer a wide range of functionsand features. Capacity controls are used to meet adesign control criteria or space condition. Do youneed to maintain RH, condensation or dew pointcontrol? With SATS/DESICAiR® you can specify thetype and tolerance of control that you require for eachdemanding project.

Desiccant RotorThe rotary style desiccant rotors utilized in Series2000 systems are manufactured using a unique,media (substrate) formulated for maximum perfor-mance with minimal maintenance.

The high performance silica gel desiccant is non-corrosive and non-toxic. The rotor is equipped with anon-slip, synchronous, belt-drive system.Series 2000 dehumidifiers utilize an 8" deep rotor toachieve the published performance data. For dewpoint requirements below those shown on the en-closed performance charts, please consult the factory.

The desiccant is not adversely affected by exposure toair even at 100% relative humidity nor to idle or toprolonged storage in humid atmospheres. The dehu-midification rotor is capable of sustained operation witheither or both the process or the reactivation bloweroperating without reactivation heat applied. Suchoperation does not cause loss of desiccant or soften-ing of the rotor.

The rotor is cleanable with either warm water, deter-gent or a solvent solution without damage or loss ofdesiccant. Performance is virtually unaffected. Degra-dation due to washing of the rotor is less than 3% over10 years. This slight loss in performance is accountedfor in the published performance data. Initially, mea-sured performance of a dehumidifier is actually betterthan indicated by the published data due to SATS’sconservative approach to applications engineering.

The desiccant rotor is backed by a standard exclusivewarranty for five (5) years against softening or collapsedue to exposure to humid air.

Pressure Indicating GaugesDifferential pressure indicating gauges are provided toindicate the pressure drops accross the rotor for airbalancing.

Separate gauges are provided for process and reacti-vation air streams. The gauges are factory mounted onthe cabinet and visible without requiring the removal ofany panels or access covers. The gauges have a largeface and dial and are suitable for either indoor oroutdoor applications.

Air SealsThe process and reactivation sections are providedwith air seals to prevent leakage and mixing of one airstream to the other.

The air seals are constructed of a two ply material withthe contact surface made of a reinforced PTFE materi-al. The PTFE is bonded to a flexible backer to allow forthermal expansion and contraction. The seals androtor construction allow for independent adjustmentand balancing of the process or reactivation air flow.Dual, double lipped, continuous high temperaturesilicone seals are utilized to seal the rotor peripheryflange. Balloon or bulb type seals, which tend to split,are not used.

BlowersA process air blower is provided and sized for the airrequirements of standard Series 2000 units as listed inthe performance table on page 5-1. The external staticpressure (ESP) available for standard units is alsoshown in the Table. Smaller units utilize direct drivenblowers. Larger units utilize belt driven blowers thatinclude an adjustable pulley to allow for field adjust-ment. The process blower shaft is sealed to preventmoisture infiltration into the dehumidification system.The standard blower orientation is horizontal dis-charge. Up blast or other discharge orientations areavailable.

A reactivation blower is provided and sized for the airrequirements of standard units. Series 2000 unitsutilize direct drive reactivation blowers as standard.The standard blower orientation is horizontal dis-charge. Up blast or other discharge orientations areavailable as factory options.

MotorsIndustrial duty motors for either process or reactivationblowers are TEFC and suitable for either indoor oroutdoor installation. Premium efficiency motors arealso available.

SERIES 2000 Dehumidifiers - Outstanding Advantages

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2-4

DampersManual air flow regulating dampers are provided asstandard on all direct drive blowers. An externaladjusting arm and positive locking mechanism isincluded. Air flow regulating dampers are available asa factory mounted option for belt driven blowers.

Rotor DriveThe rotor drive system is equipped with all the neces-sary components for continuous slip free operation.The drive system consists of a speed reducer, belttensioner and a reinforced synchronous drive belt.Matching cleats are permanently mounted on the rotor.

Rotor rotation is continuous. This feature preventshumidity “spikes” caused by intermittent or indexingtype machines. The rotation speed is predeterminedand is selected to achieve maximum dehumidificationeffectiveness.

The rotor is shaft mounted and supported by ballbearings for long life and minimum maintenance. Theball bearings support the full weight of the rotor withoutinducing stress on the rotor’s outer wrapper or flutes.

Rotation failure detection is not required to protect therotor and is not provided on standard units. However, itis available as a factory installed option.

The speed reducer drive motor is housed within thecassette section of the dehumidifier cabinet and is notexposed to ambient conditions.

Reactivation HeaterSeries 2000 units are available with electric, steam orgas fired reactivation heater sections. The reactivationheater section is mounted in an insulated housing tominimize heat loss and to prevent incidental contactwith hot surfaces by operating or service personnel.This important conservation and safety feature isprovided for all series 2000 units. Gas fired heatersare installed in stainless steel lined, double wallsections.

Electric Reactivation:Controls for electric reactivation heaters include an airproving switch that is wired in the heater control circuitto prevent the heater from operating during loss ofreactivation airflow.

Two high temperature safety cutouts are installed inthe heater control circuit. One temperature sensor islocated between the heater and the rotor inlet. Thesecond temperature sensor is installed in the reactiva-tion air discharge. In the event of an overheat occur-rence, a fault light located on the operator’s panel issignaled. A manual reset device is provided in order toavoid attempted operation by automatic resettingdevices during a fault condition.

Electric heaters are controlled by an adjustable solidstate proportional control system designed to preventoverheating and to provide energy conservation bymatching heat input to the required moisture removalrate. Electric reactivation heaters have three (3) levels


2-5

of control: air proving, high temperature overheat cutout and leaving reactivation temperature control. Areactivation cool down cycle removes residual heatfrom the system when the unit shuts down.

Steam Reactivation:Steam heating coils are housed in an easily accessi-ble insulated section to ensure maximum thermaltransfer to the reactivation air stream and provide forpersonnel safety. This exclusive design featurecomplies with OSHA regulations concerning person-nel safety protection from hot surfaces. Steam coilsare the non freeze steam distributing type. Coilconnections are stubbed out through the dehumidifiercabinet. Coil removal is provided through the front ofthe cabinet as part of the service access.

The “heated to” temperature is limited by the supplysteam pressure. The reactivation leaving temperatureis automatically controlled by a factory installed solidstate controlled modulating damper. This standardcontrol feature conserves steam consumption bymatching energy input with the required moistureremoval rate. When humidity loads are less thandesign conditions the controller modulates the dampertoward the closed position. As this modulation occurs,less air passes over the steam coils causing lesssteam to be condensed. Since the steam coils do not“cool down” unless the steam supply is turned off, acool down cycle is not required.

Direct Fired Gas Reactivation:Direct fired natural or LP gas reactivation heaters areavailable and include all the necessary controls todetect and monitor the gas flame. Controls include anair proving switch that is wired in the heater controlcircuit to prevent the heater from operating if thereactivation blower fails.

Two high temperature safety cutouts are installed inthe heater control circuit. One temperature sensor islocated between the heater and the rotor inlet. Thesecond temperature sensor is installed in the reactiva-tion air discharge. In the event of an overheat occur-rence, a fault light located on the operator’s panel issignaled. A manual reset device is provided in order toavoid attempted operation by automatic resettingdevices during a fault condition.

A control system regulates the reactivation leavingtemperature. Energy saving automatic modulation ofthe gas supply is provided as standard. The gas firedheaters are mounted in double-wall sections with 300series stainless steel liners.

The gas train is designed to Factory Mutual guide-lines. Compliance to local codes for venting and otherrequirements are the responsibility of the owner.

The pilot flame can be adjusted and set independentof the main flame. Separate gas pressure regulatorvalves are provided for the pilot and main gas line. Aspark igniter system is used. Gas fired reactivationheaters have at least eight (8) levels of control andsafety features: air proving, ignition control, flamedetection, high gas pressure cutout, low gas pressurecutout, slow opening main gas supply valve, “heatedto” high temperature limit and reactivation leavingtemperature control. A reactivation cool down andpurge cycle removes residual heat and the by prod-ucts of combustion from the system when the unitshuts down. Indirect gas fired reactivation heaters areavailable as an option.

Cabinet ConstructionThe dehumidifier is constructed of high grade 5052aluminum alloy for corrosion protection. Standardunits have 1/8" thick single wall construction with rigidsupports. The outer surface is coated with an industri-al self etching “direct to metal” high quality low VOCepoxy coating. This coating system is designed foreither indoor or outdoor exposure.

2-6

Access panels are provided to allow for the service orreplacement of all major components without discon-necting duct work or power supply connections. Fulljam gaskets are standard to prevent moisture infiltra-tion into the cabinet. Rapid turn stainless steel captivefasteners with combination hex and slotted heads areprovided on the service access panels. An observationwindow is included to allow for the visual confirmationof rotor rotation without removal of a service panel.

Test ports are provided as standard. Ports are locatedto allow for the measurement of temperature or humidi-ty both upstream and downstream of the desiccantrotor. A port is also provided to allow for the measure-ment of the reactivation “heated to” temperature.These convenient test ports allow for the confirmationof design conditions during startup and operatingcycles.

Internal insulation is available as an option for applica-tions when the inlet air temperature is below theambient air dew point temperature to prevent conden-sation from forming on the cabinet. This option will alsoretard heat gain to a low temperature space should thedehumidifier be located within the controlled space.

Unit ConfigurationStandard units are of the “left” hand configuration asshown in the preceding photo with the access panelson the left as you are facing the process air inlet.“Right” hand configurations are available.

SkidThe dehumidifier skid is designed to support the fulloperating weight of the unit and to allow for rigging,transportation and handling at the job site. Lifting

points are provided as standard to assist in loadingand placing the equipment at the job site.

ConnectionsAll air connections have flanges as standard. Flangesare left blank for match drilling in the field. Optionalinlet and outlet designs include weather protectedhooded intakes or hooded outlets.

FiltersTwo inch thick, replaceable 30% pleated filters areprovided as standard. The filters are track mounted forease of service. Side access is provided for processand reactivation air filters. Filter differential pressureindicating gauges and “dirty filter” alarms are availableas factory installed options.

ControlsAn ON/OFF/AUTO selector switch is standard. Theswitch is panel mounted on a NEMA 4 electricalenclosure. The switch and indicating lights are ratedfor outdoor service. The control panel is listedUL508A.

ON: In the “ON” mode the dehumidifier operatescontinuously.

OFF: In the “OFF” position all motors, drives andheaters are de-energized. Upon shut down of thedehumidifier, the process blower and reactivationheater are de-energized. For electric and gas firedreactivated units, the rotor drive and reactivationblower continue to operate during a cool down cycle.This cool down cycle removes residual heat from therotor and reactivation sector.


Capacity Control MethodsSATS/DESICAiR® offers a wide selection of dehumidi-fier capacity controls. Dehumidifiers are selected anddesigned to meet maximum operating conditions forthe humidity control project. Most of the time, the unitis operating at less than design conditions. If notcontrolled properly, too much energy would be con-sumed to meet performance requirements. Energyconservation controls ensure that enough reactivationenergy is applied to meet the performance by modulat-ing the reactivation heater.

D-Stat®: The dehumidifier responds to a control signalfrom a humidistat. In the “AUTO” mode the dehumidifi-er responds to a humidistat and remote start/stopsignal. A wall mounted humidistat is available as anoption for field mounting. Terminal connections areincluded in the electrical enclosure for connection ofthe humidistat. The D-Stat® control system cycles thedehumidifier On and Off. The unique SATS cascadecontrol system regulates both the reactivation “heatedto” temperature as well as the reactivation leavingtemperature. The D-Stat® control system is recom-mended for dry goods storage, warehousing or wherecontrol tolerance is not critical.

D-Stat II®:This control feature is similar to the D-Stat® controlsystem. In addition to the D-Stat® option, the D-Stat II®

control system operates the process blower continu-ously while the reactivation heater and blower arecycled On and Off in response to an optional humidis-tat. This feature provides for an uninterrupted supply ofair to the space or process area. This is particularlyimportant in systems where the humidity is just one ofthe controlled parameters. A wall mounted humidistatis available as an option for field mounting. Air volumefor upstream or downstream heating or cooling pro-cesses are unaffected by the D-Stat II® control system.The D-Stat II® control system is recommended wherethe dehumidifier is part of an air handling system orwhere control tolerance is more critical.


C-Trol II®:The dehumidifier responds to a control signal from acontroller which compares a cold surface temperatureto ambient dew point temperature to prevent conden-sation from forming on cold surfaces. In the “ON”mode reactivation energy is proportionally controlled tomaintain the air dew point temperature below the coldsurface temperature. All set points are adjustable.

The process air blower runs continuously in the“AUTO” mode to provide a circulating air current withinthe space. In the “AUTO” mode the dehumidifierresponds to a remote start/stop signal. The C-TroI II®

control system is recommended for water treatmentplants, salt storage facilities or atriums to preventdripping and damage caused by condensate.

Dew-Trac®:The dehumidifier responds to a control signal from adew point transmitter. In the “ON” mode the Dew-Trac®

controller automatically regulates the reactivationheater to provide a constant process air leaving orspace dew point temperature. In the “AUTO” mode thedehumidifier responds to a remote start/stop signal.The Dew-Trac® control feature may include an optionalspace mounted dew point sensor/ transmitter andadjustable set point microprocessor controller. TheDew-Trac® control system is recommended for appli-cations where the controlled humidity level is belowthe capability of a relative humidity sensor or wherethe dew point control is more critical to the manufac-turing or laboratory process than control based uponrelative humidity.

H-Trac®:The dehumidifier responds to a control signal from anoptional unit mounted or space mounted relativehumidity transmitter. In the “ON” mode the H-Trac®

controller automatically regulates the reactivationheater to provide a constant relative humidity of eitherthe process air or “space” condition. In the “AUTO”mode the dehumidifier responds to a remote start/stopsignal. The H-Trac® control feature may include anoptional adjustable set point microprocessor controller.With the H-Trac® control system, the dehumidifierruns continuously and maintains a constant relativehumidity.

The C-Trol II®, Dew-Trac® and H-Trac® control systemwill continuously adjust the dehumidifier capacity inresponse to load changes within the controlled space.Load changes can occur due to changes in manufac-turing rates, ventilation, product movement in, or out,of the “space” or manpower requirements, etc. The C-

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Trol II®, Dew-Trac® and H-Trac® control systems canbe utilized for precise humidity control without the useof customary face and bypass damper sections. Byeliminating the damper section, air instability, damper“leakage”, and actuator hysteresis are eliminated.Service intervals are extended as fewer mechanicalcomponents are required. Response to a change inload is rapid and initiates as quickly as the signalreaches the heater control system.

Wiring practices, branch circuit protection, motorstarters and overload protection are provided inaccordance with the latest edition of the NationalElectric Code.

Status indication lights are mounted on the electricalenclosure front panel. Lights to indicate: Power On,Unit On and a fault condition are standard. Unit Onand fault lights include a “Press-To-Test” feature tocheck light bulb operation.

All wiring is run in flexible liquid tight conduit. All wiresare individually numbered and harness bundles areneatly tie wrapped. A grounding lug is provided in theelectrical enclosure.

A lockable non fused or fused disconnect is availableas a factory installed option. When provided, thedisconnect is mounted on the dehumidifier cabinet andpower cable is factory wired between the power supplyterminals located within the electrical enclosure andthe disconnect.

An elapsed run time hour meter is provided as stan-dard. The hour meter is mounted within the electricalenclosure.

Power SupplySingle point electrical power connection is provided.Series 2000 dehumidifiers are available to operate onpower grids as shown on page 5-2. Other powerrequirements, such as for export markets for example,are available as an option. Please contact the factoryfor special requirements.

WarrantySATS provides a limited warranty for 24 months fromdate of start up for mechanical and electrical compo-nents. Normal wear and tear is excluded. (Certainterms and conditions apply.) The desiccant rotor iscovered by an exclusive 60 month warranty againstsoftening or collapse even if exposed for prolongedperiods to saturated air.

Start UpStart up kits including replacement fuses used in theprimary, secondary and control circuits; indicatinglamps used on the control panel; blower belts andfilters are available.

Supervision of Start up activity or performance ofStartup can be provided by the SATS Product SupportGroup or by a factory authorized contractor for alldehumidifiers.

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Grains Per Pound(GPP)

1. Find the correct “Process EnteringMoisture” (humidity) value in grainsper pound (GPP) on the x-axis of theMoisture Removal Capacity graph.

2. Move vertically in a straight line tointersect the curve closest to theentering air temperature. Interpolateas required.

3. Move horizontally to the left andintersect the scale marked “ProcessLeaving Air Moisture”. The value atthis point represents the moisture/humidity leaving the dehumidifier ingrains per pound.

Degrees Fahrenheit(°F)

1. Find the correct process “ProcessEntering Moisture” (humidity) value ingrains per pound (GPP) on the x-axisof the Process Leaving Air Tempera-ture graph.

2. Move vertically in a straight line tointersect the curve closest to theentering air temperature.

3. Move horizontally to the left andintersect the scale marked “ProcessLeaving Air Temp.” The value at thispoint represents the air temperatureleaving the dehumidifier in °F.

Moisture Removal Capacity

Performance Curves - 400 FPM Rotor Face Velocity

Process Leaving Air Temperature400 FPM Process Air Velocity

Moisture Removal Capacity400 FPM Process Air Velocity

Note:Process leaving air temperatures as shown are at maximum values at standard full rated heater output. The actual leaving airtemperature will be lower whenever the heater output is below full rated output. The condition will occur during heater modulationcycles due to partial loading of the dehumidifier.

Process Leaving Temperature

Process Entering Moisture: GPP


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SERIES 2000 Dehumidifiers - Nomenclature

Model Nomenclature

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SERIES 2000 MODEL NUMBERING SYSTEM

DES - XXX - XXX - XReactivation Heater:

-Electric-Gas-Steam

Rotor Diameter:-55 cm-77 cm-106 cm-122 cm-152 cm

Nominal Scfm:-750 -2250-1150 -2750-1500 -3000-3750 -4250-5500 -6000-7250 -9000-1200

DES Standard Dehumidifier

3-1

“DES” Model DES-750-55 -1150-55 -1500-55 -1500-77 -2250-77 -3000-77

Reactivation• Electric with Solid State Control Standard Standard Standard Standard Standard Standard• Direct Natural Gas Optional Optional Optional Optional Optional Optional• Direct Propane Gas Opt Opt Opt Opt Opt Opt• Steam Opt Opt Opt Opt Opt Opt

Unit Configuration - Process Blower Orientation

• Left Hand Std Std Std Std Std Std• Right Hand Opt Opt Opt Opt Opt Opt

Cabinet Construction - 0.125” Thick All Aluminum Construction

• Molecular Sieve Rotor Opt Opt Opt Opt Opt Opt• Outdoor Rated (Nema 4 control enclosure) Std Std Std Std Std Std• Single Wall Construction Std Std Std Std Std Std• Rental/Portable Opt Opt Opt Opt Opt Opt• 1/2” Insulation for 55°F inlet temperature Opt Opt Opt Opt Opt Opt• 1” Insulation for 45°F inlet temperature Opt Opt Opt Opt Opt Opt• Structural Rail Mounting Std Std Std Std Std Std• Rental Skid With Structural Frame Opt Opt Opt Opt Opt Opt• Extended Skid With Cover Opt Opt Opt Opt Opt Opt

Paint - Industrial/ Marine, High Gloss, Siloxane Epoxy• Industrial Gray Std Std Std Std Std Std• Yellow Opt Opt Opt Opt Opt Opt• Blue Opt Opt Opt Opt Opt Opt• Desert Tan Opt Opt Opt Opt Opt Opt• Forest Green Opt Opt Opt Opt Opt Opt

Filtration- Meets ASHRAE Standard 52.1-1992• Process Inlet- 30% Pleated Std Std Std Std Std Std• Process Inlet- 30% Pleated w/ Gauge Opt Opt Opt Opt Opt Opt• Reactivation Inlet 30% Pleated Std Std Std Std Std Std• Reactivation Inlet 30% Pleated w/ Gauge Opt Opt Opt Opt Opt Opt

Gauges• Rotor Differential Pressure Indicating Gauges Std Std Std Std Std Std• Run Time Hour Meter Std Std Std Std Std Std

Inlet/ Outlet ConfigurationsProcess Inlet

• Flanged Std Std Std Std Std Std• Weather Hood w/ Screen Opt Opt Opt Opt Opt Opt• Round/Screened w/ Flex Duct Bead Opt Opt Opt Opt Opt Opt• Round for Rigid Duct Opt Opt Opt Opt Opt Opt• Rental- Round Flex w/ Screen Opt Opt Opt Opt Opt Opt

Process Outlet• Flanged N/A N/A N/A N/A N/A N/A• Flanged w/ Damper Std Std Std Std Std Std• Round/Screened w/ Flex Duct Bead, Damper Opt Opt Opt Opt Opt Opt• Round for Rigid Duct, w/ Damper Opt Opt Opt Opt Opt Opt• Rental- Round Flex w/ Screen Opt Opt Opt Opt Opt Opt

Reactivation Inlet• Flanged Std Std Std Std Std Std• Weather Hood w/ Screen Opt Opt Opt Opt Opt Opt• Round w/ Flex Duct Bead Opt Opt Opt Opt Opt Opt

Selected Features - DES Series Dehumidifiers

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Selected Features - DES Series Dehumidifiers

Standard Standard Standard Standard Standard Standard Standard Standard StandardOptional Optional Optional Optional Optional Optional Optional Optional OptionalOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt Opt

Std Std Std Std Std Std Std Std StdOpt Opt Opt Opt Opt Opt Opt Opt Opt

Opt Opt Opt Opt Opt Opt Opt Opt OptStd Std Std Std Std Std Std Std StdStd Std Std Std Std Std Std Std StdN/A N/A N/A N/A N/A N/A N/A N/A N/AOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt OptStd Std Std Std Std Std Std Std StdOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt Opt

Std Std Std Std Std Std Std Std StdOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt Opt

Std Std Std Std Std Std Std Std StdOpt Opt Opt Opt Opt Opt Opt Opt OptStd Std Std Std Std Std Std Std StdOpt Opt Opt Opt Opt Opt Opt Opt Opt

Std Std Std Std Std Std Std Std StdStd Std Std Std Std Std Std Std Std



Std Std Std Std Std Std Std Std StdOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt Opt

-2750-106 -4250-106 -5500-106 -3750-122 -5500-122 -7250-122 -6000-152 -9000-152 -12000-152

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Selected Features (cont.) - DES Series Dehumidifiers

“DES” Model DES-750-55 -1150-55 -1500-55 -1500-77 -1500-77 -1500-77

• Round for Rigid Duct Opt Opt Opt Opt Opt Opt• Rental- Round Flex w/ Screen Opt Opt Opt Opt Opt Opt

Reactivation Outlet• Flanged w/ Damper Std Std Std Std Std Std• Weather Hood w/Screen for Outdoor Installations Opt Opt Opt Opt Opt Opt• Round/Screened w/ Flex Duct Bead, Damper Opt Opt Opt Opt Opt Opt• Round for Rigid Duct w/Damper Opt Opt Opt Opt Opt Opt• Rental- Round Flex w/ Screen Opt Opt Opt Opt Opt Opt

Power• 460/3/60 Std Std Std Std Std Std• 575/3/60 Opt Opt Opt Opt Opt Opt• 230/3/60 Opt Opt Opt Opt Opt Opt• 208/3/60 Opt Opt Opt Opt Opt Opt• 230/1/60 (N/A for Electric Reactivation) Opt Opt Opt Opt Opt Opt• 208/1/60 (N/A for Electric Reactivation) Opt Opt Opt Opt Opt Opt

Disconnects• None Std Std Std Std Std Std• Rotary, Non-fused Opt Opt Opt Opt Opt Opt• Knife, Non-fused, NEMA-3R Opt Opt Opt Opt Opt Opt• Knife, Fused, NEMA-3R Opt Opt Opt Opt Opt Opt

Safety• Overheat Protection (N/A for Steam Reactivation) Std Std Std Std Std Std• Reactivation Air Proving (N/A for Steam Reactivation) Std Std Std Std Std Std• Emergency Stop Opt Opt Opt Opt Opt Opt• Voltage/Phase Monitor Opt Opt Opt Opt Opt Opt

Capacity Control Method• D-Stat Std Std Std Std Std Std• D-Stat II Opt Opt Opt Opt Opt Opt• H-Trac Opt Opt Opt Opt Opt Opt• C-Trol II Opt Opt Opt Opt Opt Opt• Dew-Trac Opt Opt Opt Opt Opt Opt

Control Sensor Provision• None - Customer Provided Std Std Std Std Std Std• Field Mounted - Duct Opt Opt Opt Opt Opt Opt• Field Mounted - Wall Opt Opt Opt Opt Opt Opt

Status Monitoring Indicator Lights• Power On (White) Std Std Std Std Std Std• Unit On (Green) Std Std Std Std Std Std• Motor Fault (Red) (Standard for Steam Reactivation) Opt Opt Opt Opt Opt Opt• Rotor Rotation Fault (Red) Opt Opt Opt Opt Opt Opt• High Reactivation Temp (Red) Std(1) Std(1) Std(1) Std(1) Std(1) Std(1)• Air/Gas Fault (Red) Std(2) Std(2) Std(2) Std(2) Std(2) Std(2)• Burner Fault (Red) Std(2) Std(2) Std(2) Std(2) Std(2) Std(2)

(1)Provided Only With Electric & Gas Reactivation Units; (2)Provided Only With Gas Reactivation Units

Customer Interface Terminals• Process Blower Interlock Dry Contact Std Std Std Std Std Std• Remote Start/Stop Contact Opt Opt Opt Opt Opt Opt• Summary Fault Dry Contact Opt Opt Opt Opt Opt Opt• Process/Reactivation Dirty Filters Dry Contact Opt Opt Opt Opt Opt Opt• Process Air Proving Dry Contact Opt Opt Opt Opt Opt Opt• Reactivation Air Proving Dry Contact Opt Opt Opt Opt Opt Opt

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-2750-106 -4250-106 -5500-106 -3750-122 -5500-122 -7250-122 -6000-152 -9000-152 -12000-152

Selected Features (cont.) - DES Series Dehumidifiers

Std Std Std Std Std Std Std Std StdOpt Opt Opt Opt Opt Opt Opt Opt Opt


Std Std Std Std Std Std Std Std StdOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt Opt

Std Std Std Std Std Std Std Std StdOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt Opt

Std Std Std Std Std Std Std Std StdStd Std Std Std Std Std Std Std StdOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt Opt


Std Std Std Std Std Std Std Std StdOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt Opt

Std Std Std Std Std Std Std Std StdOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt OptStd(1) Std(1) Std(1) Std(1) Std(1) Std(1) Std(1) Std(1) Std(1)Std(2) Std(2) Std(2) Std(2) Std(2) Std(2) Std(2) Std(2) Std(2)Std(2) Std(2) Std(2) Std(2) Std(2) Std(2) Std(2) Std(2) Std(2)

Std Std Std Std Std Std Std Std StdOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt OptOpt Opt Opt Opt Opt Opt Opt Opt Opt

Guide Specifications

The high performance silica geldesiccant shall remove water vaporfrom the passing airstream at therate specified in the schedule.Nominal face velocity shall notexceed 800 fpm. The silica gel shallbe bonded to the substrate in sucha way that the entire rotor surfaceshall be active as a desiccant. Thedesiccant shall not be loose withinthe rotor. Rotors with granular orcoated desiccants shall not beacceptable. Dehumidifiers requir-ing either “topping off” or re-impreg-nation of the desiccant shall not beacceptable.

The rotor shall be an extendedsurface contactor with a plurality ofparallel flutes and have laminar airflow characteristics. The rotor shallbe manufactured by windingcontinuous alternating layers ofcorrugated and flat sheets to form astrong fluted shaped rotor. Therotor shall be fabricated to includemechanical support of the mediaand shall have an external sheetmetal wrapper to encase themedia. The center hub shall bebored to accept a shaft for bearingsupport.

The desiccant rotor shall not beadversely affected by exposure toair even at 100% relative humidityor to prolonged storage or intermit-tent use in humid atmospheres forup to ten years. The desiccantdehumidification rotor shall becapable of sustained operation with

WB, ___°F Dew Point (___ % RH).All system componets except thedesiccant rotor shall have provi-sional warranty coverage for aperiod of 2 years after installation.The rotor shall be warranted for aperiod of 5 years against softeningor collapse due to exposure tohumid air.

The dehumidification systemmanufacturer shall be an ISO-9001 registered company. Thesystem shall be a model DES-________ DESICAiR Series 2000as manufactured by Stulz AirTechnology Systems, Inc. (SATS)in Frederick, Maryland, USA.

DesiccantDehumidificationThe dehumidifier shall be of thenon-cycling type with dry non-granular, non-deliquescent, non-corrosive, non-toxic silica geldesiccant. The unit shall providefor continuous dehumidificationwith concurrent reactivation of thedesiccant. The blower arrange-ment shall provide counter flow ofthe process and reactivation airstreams.

The dehumidification process shallbe by adsorption. Absorption typedesiccants such as lithium chlorideor other salt type sorption materi-als which require a change in statefor the dehumidification processshall not be acceptable.

Desiccant RotorThe desiccant rotor shall consist ofa high temperature, corregated,synthetic fiber substrate mediawith a non-migrating, water selec-tive silica gel desiccant uniformlyand permanently encapsulated inthe matrix structure of the media.The silica gel desiccant shall haveuniform macro-pore openings.

General DescriptionThe dehumidification system shallbe a desiccant dehumidifier de-signed to provide precision humidi-ty control to a space or processapplication. The dehumidifier andoptions selected shall be factoryassembled, tested and shippedcomplete with all components asdescribed here-in to maintain thespecified humidity level within theintended space or to maintain thedischarge outlet within the designload limits of this project. Thedehumidifier shall include a highperformance silica gel desiccantrotor, process air blower, reactiva-tion air blower, reactivation heater,positive drive rotor drive systemand all necessary controls forcontinuous and safe unattendedoperation.

The system cabinet shall bedesigned for outdoor installationand year round service. Thesystem shall require only connec-tion of ductwork, utilities, remotesensors and/or control signals.

At a process air flow rate of ______SCFM, the system shall provide___ lb/hr (___ Gr/lb) moistureremoval at an entering air tempera-ture condition of ___ °F DB / ___ °F

GENERAL GUIDESPECIFICATIONS

QUALITY ASSURANCE(ISO 9001 Registered)

SATS operates in an ISO9001:2000 Registered QualityManagement System. EachSATS employee is committed tosatisfying his or her customerexpectations with the highestlevel of consistent, measurableand continuous quality improve-ment.

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Rotor Pressure DropGauges:Pressure indication gauges shall beprovided to indicate the pressuredrop across the rotor. Separategauges and static pressure tipsshall be installed for process andreactivation air streams.

The gauges shall be externallymounted on the cabinet. Thegauges shall be suitable for eitherindoor or outdoor service and have4-1/2" face and analog dial. Thescale shall be selected such thatthe design pressure indication iswithin the mid-range of the gauge.The gauges shall be Dwyer Magne-helics or approved equal. Themanufacturer shall provide aTechnical Data Sheet which shallstate the expected pressure dropfor each air stream. The TechnicalData Sheet shall be included withthe Operations & Maintenancemanual provided with each unit.

Rotor Air SealsThe process and reactivationsectors shall be provided with airseals to prevent cross leakage.The seals shall prevent leakagefrom one air stream to the other.The seals and rotor frame con-struction shall provide for indepen-dent adjustment of the process andreactivation air flow without regardof the air pressure differencebetween the process and reactiva-tion air streams.

A dual lipped continuous hightemperature seal shall be installed

against a flange mounted on theperiphery of the rotor to prevent airfrom by-passing the rotor. Sealsshall be mounted on both theentering and leaving face of therotor. Balloon or bulb type sealsare not acceptable.

Seals shall be secured in such away as to permit easy removal.Pop rivets which require excessmaintenance time during replace-ment is not acceptable. Removalof the rotor shall not be required toadjust or replace seals.

Blowers/MotorsThe process air blower shall becentrifugal type with a continuouswelded housing, unless otherwisespecified. The blower shall besized for the air requirements perthe schedule.

Process blowers for air volume lessthan 3000 cfm (550 mm & 770 mmrotor diameter) shall be direct drivetypes, unless otherwise specified.Shaft seals shall be provided toprevent moisture leakage into thedehumidified air stream.

Process blowers for air volumesgreater than 3000 cfm (106 mmdiameter rotors) shall be beltdriven, unless otherwise specified.Belt driven blowers shall include aminimum of two drive belts. Anadjustable sheave shall be provid-

either the process or the reactiva-tion blower operating withoutreactivation heat applied.

The rotor shall be able to becleaned with either warm water ordetergent wash without damage orloss of desiccant. The desiccantshall retain a minimum of 95% of itsworking capacity after ten washingsper the manufacturers instructions.

The rotational speed shall bedesigned for the maximum dehu-midification effectiveness per themanufacturer’s performance dataand to prevent wave front breakthrough at design conditions.

Rotor DriveThe rotor drive system shall beprovided with all the necessarycomponents for continuous slip freeoperation. The rotational speedshall be designed for the maximumdehumidification effectiveness perthe manufacturer’s performancedata and to prevent wave frontbreak through at design conditions.The drive system shall consist of afixed speed motor, speed reducerand a reinforced flexible drive beltand belt tensioner. The speedreducer shall have lifetime lubrica-tion and not require field or periodi-cal maintenance lubrication.Removal of the rotor shall not berequired to replace the drive belt. Amotor starter shall be provided andwired by the manufacturer.The rotation shall be continuous.Intermittent operation or indexingshall not be permitted.The rotor shall be shaft mountedand supported by ball bearings forlong life and low maintenance. Ballbearings shall be sized to supportthe rotor at full saturated weightwithout inducing stress on therotor’s outer wrapper or flutes. Thedehumidification rotor shall not bemounted on casters or rollers.

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a minimum of 5 minutes wheneverthe heater is de-energized by thecontrols.

A perforated diffuser plate shall bemounted between the reactivationinlet filter and the heater to preventradiant heat from reaching compo-nents.

An air proving switch shall beinstalled in the reactivation airstream and connected in serieswith the reactivation heater toprevent the heater from energizingin the event of loss of air flow. Theheater shall be interlocked with theprocess and reactivation blowermotor starters to prevent energizingthe heater in the event of blowermotor failure.

Natural (Propane) Gas:Direct fired natural (propane) gasreactivation heaters shall include allthe necessary controls to detect,monitor and regulate the gas flameand reactivation temperature asrequired. Automatic modulation ofthe gas supply shall be included bythe dehumidifier manufacturer.

Gas heaters shall include a hightemperature cut out. Overheatsensors shall measure the reactiva-tion air temperature as it enters therotor and as it leaves the rotor.Controls shall include an air prov-ing switch which is wired in theheater control circuit to prevent theheater from operating in the eventof the reactivation air flow loss. TheDES unit heater controller shalllimit the reactivation temperatureas well as regulate the reactivationoutlet temperature. The pilot flameshall be adjusted and set indepen-dent of the main gas flame. Sepa-rate gas pressure regulator valvesshall be provided for the pilot andmain gas line. A spark ignitersystem and a listed flame safetyrelay shall be utilized. Both highgas and low gas pressure cut-outs

selected to satisfy the summer andwinter performance requirementsper the schedule and shall becompletely factory assembled.The reactivation heater shall behoused in an insulated enclosure tominimize heat loss and to preventincidental contact with hot surfacesby operating or service personnel.

Electric:Electric heaters shall include a hightemperature cut out. Overheatsensors shall measure the reactiva-tion air temperature as it enters therotor and as it leaves the rotor. Afault light located on the operator’spanel shall be signaled in the eventof an overheat occurrence. Amanual reset shall be required inorder to prevent attempted repeat-ed operation by automatic resettingdevices in a fault condition. Thereset button shall be mounted onthe electrical enclosure.

Electric heaters shall be staged notto exceed 48 amps per branch andcircuit protection shall not begreater than 60 amps in accor-dance with the National ElectricCode.

Electric heaters shall be open ni-chrome wire elements with anominal watt density of less than35 watt/in2 of heater element crosssectional area. Heater elementsshall be mounted in 304 stainlesssteel frames and have ceramicinsulators. Heater wire runningfrom the heater contactor to theheater terminal box shall be PTFEcoated and shall be rated for 200degree C service.

Electric heaters shall be controlledby an adjustable solid state propor-tional control system designed toprevent overheating and to provideenergy conservation. A cool downpurge shall be incorporated tooperate the reactivation blower for

ed for two belt drives and it shall beselected such that the operatingrpm shall be at the mid-value of theadjustable range. Drives requiring 3belts or more shall have fixed pitchsheaves. Belt driven blowers shallbe mounted on vibration isolators.The process blower housing andshaft shall be sealed to preventmoisture infiltration into the dehu-midification system. The blowermotor shall be TEFC with a 1.15service factor. A motor starter shallbe included and wired at thefactory.

The reactivation air blower shall bea direct drive centrifugal type with awelded housing. The blower shallbe sized for the air requirementsper the schedule. The externalstatic pressure shall meet therequirements of the schedule. Theblower motor shall be TEFC with a1.15 service factor. A motor startershall be included and wired at thefactory.

Process Blower Motor:The process blower/motor assem-bly shall be sized to provide______ CFM @ ______ inchesstatic pressure.

Reactivation Blower Motor:The reactivation heater blower/motor assembly shall be sized toprovide ______ CFM @ ______inches static pressure.

Reactivation HeaterThe reactivation heat source shallbe electric (steam, natural (pro-pane) direct fired gas) as specifiedon the schedule. The reactivationheat shall be of sufficient capacityto ensure the complete and contin-uous reactivation of the desiccantduring summer or winter operationof the dehumidifier.

The reactivation heater shall be

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5052 grade aluminum for corrosionprotection. The cabinet shall be offormed sections, welded, groundsmooth and painted. Unit airleakage shall be less than 1% ofdesign airflow rate measured atrated unit static pressure. Themanufacturer shall provide pluggedfloor drains in each section of theprocess air side of the unit.

Access panels with full jam stylegaskets shall be provided on atleast one side of the cabinet inorder to allow service and orreplacement of all major internalcomponents. 304 ss captive fasten-ers with a combination hex andslotted head shall be provided onall service panels. An observationwindow shall be provided to allowfor the visual confirmation of rotorrotation without removal of theservice panel.

Probe style test ports shall beprovided as standard. Ports shallbe located to allow for the mea-surement of temperature andhumidity both upstream and down-stream of the desiccant rotor. Asingle port shall be mounted toallow for air temperature measure-ment between the reactivationheater and rotor.

The cabinet shall be painted withan industrial/marine high gloss selfpriming weather resistant siloxane-epoxy protective coating with anadhesive strength of 2700 psi (onsteel using ASTM D4541). Thecoating shall be formulated withvery high solids and extremely lowvolatile organic compounds. Thecoating color shall be industrial

shall be provided.

The gas components and controlsshall be in accordance with FactoryMutual guidelines. Compliance tolocal codes for venting or otherinstallation regulations is theresponsibility of the installingcontractor.

Steam:Steam heating coils shall behoused in an insulated enclosure toensure maximum thermal transferto the reactivation air stream and tocomply with OSHA regulationsconcerning personnel safetyprotection from hot surfaces.

Steam heating coils shall be thenon-freeze steam distributing typewith 10" long 2.5" diameter NPTpipe connections brazed to copperheaders, 0.049" thick copper tubes,0.0075 aluminum fins with maxi-mum 12 fins per inch, copperheader, galvanized casing. Coilsshall be pressured tested to 300psig and rated for 150 psig maxi-mum operating pressure. Facevelocity shall not exceed 800 fpm.

Coil connections shall be stubbedout through the reactivation cabi-net. Steam fittings and piping shallbe provided by the installing con-tractor in accordance with theschedule.

The reactivation leaving tempera-ture shall be automatically main-tained at 120 - 130 degrees F bymodulating the reactivation inletdamper to vary the reactivation airvolume. The damper shall be a lowleakage type with high temperaturesilicone edge seals, bronze bear-ings and a solid state controlleddirect shaft mounted actuator.

Cabinet ConstructionThe DES unit cabinet shall beconstructed of formed 0.125" thick

Guide Specificationsgray and have a dry film thicknessof 3 - 7 mils per coat. The coatingshall have a USDA qualification forincidental food contact.

SkidThe dehumidifier shall include askid adequate to support the fulloperating weight of the unit and toallow for rigging, transportation andhandling at the job site as well asleveling at installation. Non-con-ducting galvanic isolation is re-quired between dissimilar materialsof the skid and cabinet.

Air ConnectionsIndoor Air Connections:Flanged:Air inlet and outlet connectionsshall be square or rectangular withinterface flanges. Flanges areblank for match drilling in the fieldby the installing contractor.

Round, Beaded:As an option, round connectionswith circumference bead shall befactory installed for flexible ducts.

4-4


4-5

Round, No Bead:As an option round, non-beadedconnections shall be available forhard ducts.

Outdoor Air Connections:Inlet/Outlet Hoods:As an option, outdoor units shallinclude a protective weather hoodwith safety/bird screen for thereactivation inlet and the processmake-up air inlet and a screenedhood or louvers for the process airoutlet.

DampersAir flow regulating dampers shallbe required for the process airstream and for the reactivation airstream. The dampers shall allowfor the proper setting of the re-quired airflow through the dehumid-ifier. Proper flow shall be deter-mined by setting the static pressuredrops across the desiccant rotor to

a pre-determined value as shownon static pressure gauges. ATechnical Data Sheet which in-cludes the specified pressure dropsfor each air stream shall be includ-ed with the Installation Operation &Maintenance manual furnished witheach unit

A manually adjustable balancingdamper shall be available as anoption on each blower outlet toallow for setting the air flow vol-ume. Dampers shall be mountedon a steel shaft with a bronzebushing. An external locking armwith a positive locking mechanismshall be provided.

FiltersThe process and reactivation airinlets shall have pleated disposablefilters listed by UL as Class (1)(2).The filters shall be rated at anaverage of 25-30% efficiency perASHRAE Standard 52.1-1992.

ControlsIn the ON mode all componentsshall operate automatically andcontinuously. In the OFF positionall motors, drives and heaters shallbe de-energized. In the AUTOmode the unit responds to a remote

start/stop control signal. Upon shutdown of the dehumidifier, theprocess blower and reactivationheater shall be de-energized; forelectric and gas-fired reactivatedunits, the rotor drive and reactiva-tion blower shall continue to oper-ate during a cool down cycle toremove residual heat from the rotorand reactivation sector.

The dehumidifier shall be controlledby (specify one of the following):

D-Stat®:The dehumidifier shall respond to acontrol closure signal from ahumidistat. The humidistat shallmake/break a 115 VAC circuit. Awall mounted humidistat shall beavailable as an option from themanufacturer for installation by thecontractor. Terminal connectionsshall be included in the electricalenclosure for connection of thehumidistat. The D-Stat® controlsystem shall cycle the dehumidifier,including the process blower, Onand Off.

D-Stat II®:The dehumidifier shall respond to acontrol closure signal from ahumidistat. The humidistat shallmake/break a 115 VAC circuit. Aduct or wall mounted humidistatshall be available as an option fromthe manufacturer for installation bythe contractor. Terminal connec-tions shall be included in theelectrical enclosure for connectionof the humidistat. The D-Stat II®

control system shall cycle thereactivation heater and blower Onand Off in response to a humidistatwhile the dehumidifier processblower operates continuously.

C-Trol II®:The C-Trol II® condensation controlsystem shall automatically regulatethe dehumidifier capacity to preventcondensation from forming on coldsurfaces. The dehumidifier shall

4-6

respond to a control signal from acontroller which compares a coldsurface temperature to ambientdew point temperature to preventcondensation from forming on coldsurfaces. A surface mountedtemperature sensor shall beprovided by the unit manufactureras an option and field installed bythe contractor.

Space ambient dew point tempera-ture shall be measured by a sen-sor/transmitter provided by the unitmanufacturer as an option and fieldinstalled by the contractor. Reacti-vation energy shall be proportional-ly controlled to maintain the air dewpoint temperature 6 degrees belowthe cold surface temperature.When the ambient dew pointtemperature is below the coldsurface temperature by more than12 degrees the controller shall de-energize the reactivation heaterand blower in sequence. A rise ofthe dew point temperature to within10 degrees of the water tempera-ture energizes the heater. All setpoints shall be adjustable. Theprocess air blower runs continuous-ly in the AUTO mode to provide acirculating air current within thespace.

H-Trac®:The dehumidifier shall respond to acontrol signal from a proportionalrelative humidity controller tomodulate the dehumidifier capacity.The H-Trac® controller shall auto-matically regulate the reactivationheater to provide a constant rela-tive humidity of either the processair or “space” condition. The H-Trac® control shall include a factorymounted or space mounted relativehumidity sensor/transmitter. Thecontroller shall proportionallyregulate the reactivation heater tomaintain the set point value within+/- 2% RH. Face and by-passdampers shall not be used forcapacity modulation.

Dew-Trac®:The dehumidifier shall respond to acontrol signal from a dew pointcontroller to modulate the dehumid-ifier capacity. The Dew-Trac®

controller shall automaticallyregulate the reactivation heater toprovide a constant dew pointtemperature of either the processair or space condition. The Dew-Trac® control shall include a factoryprovided dew point sensor/trans-mitter. The controller shall propor-tionally regulate the reactivationheater to maintain the set pointvalue within +/- 2% degrees Fahr-enheit. Face and by-pass dampersshall not be used for capacitymodulation.

Electrical Components&Wiring PracticeWiring practices, branch circuitprotection, motor starters andoverload protection shall be inaccordance with the NationalElectric Code. IEC style motorcontactors equipped with motorcircuit controllers, and auxiliarycontacts shall be provided.

Status indication lights shall bemounted on the control enclosurefront panel. Lights shall indicate:Power On, Unit On and Fault as aminimum.

All controls shall be mounted in aNEMA 4 UL listed electrical controlenclosure and shall be UL or CSAlisted or recognized. A ground lugconnection shall be provided in theelectrical enclosure. Control panelis UL 508 listed

All wiring shall be run in flexibleliquid tight conduit. Wires shall benumbered at both ends. The wireharness shall be neatly arrangedand tie wrapped.

Option: A knife type non-fusedlockable service disconnect shall

be provided and mounted on thedehumidifier cabinet adjacent to theelectrical enclosure.

The disconnect shall be factorywired to the power supply terminalslocated within the electrical enclo-sure. The disconnect enclosureshall be rated NEMA 3R.

Elapsed run time hour meter shallbe mounted in the electrical enclo-sure.

Power SupplyThe service provided by the ownershall be:

208/3/60230/3/60460/3/60

WarrantyThe dehumidifier shall include aconditional, limited parts warrantyfor 24 months from the date ofshipment for mechanical andelectrical components when acompleted start-up form, providedby the manufacturer, is returned bythe owner. The warranty shallinclude repair or replacement ofparts which may be defective ineither material or workmanship.

The desiccant rotor shall be cov-ered by a 60 month limited warran-ty against softening or collapse dueto exposure to even 100% humidair. The rotor warranty shall beincluded at no additional expenseand shall commence from the dateof shipment.


NOMINAL PERFORMANCE RATINGS

Note: The above Horsepower and External Static Pressure (ESP) are ratings for standard systems. For alternateair quantity or ESP requirements please contact your Sales Representative or call the factory.

For units less than 750 Scfm, please refer to either the Series 500 or the Series 1000 Brochure.

For systems with custom features such as pre and/or postcooling or heating, face and bypass damper section,special filtration, etc. please refer to the DHP Series Brochure.

.ONLEDOM

riAssecorP riAnoitavitcaeR

.leVecaFMPF

.ytQriAmfcS

rotoMpH

PSE.g.w.nI

.ytQriAmfcS

rotoMpH

PSE.g.w.nI

)(-55-057-SED 004 057 5.1 0.2 052 5.0 5.0

)(-55-0511-SED 006 051,1 0.3 0.2 383 5.1 7.0

)(-55-0551-SED 008 005,1 0.2 0.1 005 5.1 5.0

)(-77-0051-SED 004 005,1 0.2 8.1 005 5.1 4.1

)(-77-0522-SED 006 052,2 0.3 0.3 057 5.1 5.0

)(-77-0003-SED 008 000,3 0.5 2.1 000,1 0.3 8.0

)(-601-0572-SED 004 057,2 0.3 2.2 619 0.3 0.3

)(-601-0524-SED 006 052,4 0.5 0.2 614,1 0.3 2.2

)(-601-0055-SED 008 005,5 5.7 1.2 338,1 0.3 8.2

)(-221-0573-SED 004 057,3 0.5 5.2 052,1 0.3 0.3

)(-221-0055-SED 006 005,5 5.7 5.2 338,1 0.3 0.3

)(221-0527-SED 008 052,7 0.01 0.2 614,2 0.3 8.0

)(-251-0006-SED 004 000,6 5.7 0.2 000,2 0.3 0.3

)(-251-0009-SED 006 000,9 0.01 6.1 000,3 0.5 0.3

)(-251-00021-SED 008 000,21 0.51 2.1 000,4 5.7 8.0

SERIES 2000 Dehumidifiers - Specifications

5-1

ELECTRICAL DATA

*Note: Heaters are shown at their maximum rating. The heaters may not operate at their maximum capacityunder normal operating conditions. Please contact the factory for actual heater power ratings or for gas thermsor steam consumption specific to an application.

ledoMretaeH 06/3/064 06/3/032 06/3/802

Wk ALF ALF ALF

E-55-057-SEDS-55-057-SEDG-55-057-SED

51--

3.224.32.4

6.449.64.8

3.946.73.9

E-55-0511-SEDS-55-0511-SEDG-55-0511-SED

22--

7.330.68.6

3.761.216.31

5.473.310.51

E-55-0051-SEDS-55-0051-SEDG-55-0051-SED

03--

9.242.50.6

8.585.010.21

9.496.112.31

E-77-0051-SEDS-77-0051-SEDG-77-0051-SED

03--

9.242.50.6

8.585.010.21

9.496.112.31

E-77-0522-SEDS-77-0522-SEDG-77-0522-SED

44--

3.160.68.6

6.2211.216.31

6.5313.310.51

E-77-0003-SEDS-77-0003-SEDG-77-0003-SED

06--

3.589.97.01

6.0719.914.12

7.8810.226.32

E-601-0572-SEDS-601-0572-SEDG-601-0572-SED

06--

7.383.80.9

4.7616.611.81

1.5813.810.02

E-601-0524-SEDS-601-0524-SEDG-601-0524-SED

08--

4.1119.016.11

8.2228.123.32

4.6421.428.52

E-601-0055-SEDS-601-0055-SEDG-601-0055-SED

011--

6.2514.411.51

A/N8.823.03

A/N8.135.33

E-221-0573-SEDS-221-0573-SEDG-221-0573-SED

08--

4.1119.016.11

8.2228.123.32

4.6421.428.52

E-221-0055-SEDS-221-0055-SEDG-221-0055-SED

011--

6.2514.411.51

A/N8.823.03

A/N8.135.33

E-221-0527-SEDS-221-0527-SEDG-221-0527-SED

051--

2.6027.714.81

A/N4.539.63

A/N1.938.04

E-251-0006-SEDS-251-0006-SEDG-251-0006-SED

021--

9.4611.419.41

A/N3.828.92

A/N2.139.23

E-251-0009-SEDS-251-0009-SEDG-251-0009-SED

081--

3.6421.028.02

A/N2.047.14

A/N4.441.64

E-251-00021-SEDS-251-00021-SEDG-251-00021-SED

032--

3.7133.820.92

A/N6.651.85

A/N6.262.46

SERIES 2000 Dehumidifiers - Specifications

5-2

(SIZE MAY VARY)

OPTIONAL KNIFEDISCONNECT

OPTIONAL ROTARYDISCONNECT

ACCESSROTOR

DESICCANT

DESICCANT PROCESS

PROCESSAIR INLET

REACTIVATIONBLOWER

2X DRAIN

MANUALDAMPERCONTROL

REACTIVATION

AIR OUTLET

FILTER ACCESSREACTIVATION

PLUGS

DIFFERENTIAL

GUAGE BOXESPRESSURE

DISCONNECTOPTIONAL KNIFE

WINDOW

SKID

(TYP)TESTPORT

DRIVE VIEW

ELECTRIC BOX

AIR INLET

HEATING OPTION

PROCESSBLOWER

FILTER BOXREACTIVATION

REACTIVATION

REACTIVATION

PROCESSAIR OUTLET

PROCESSAIR OUTLET

ACCESSROTORACCESS

REACTIVATIONAIR INLET

AIR INLETPROCESS

ACCESSFILTER

HEATERACCESS

FILTER

AIR OUTLETREACTIVATION

MANUAL DAMPERCONTROL

1.7TYP

64.0

70.048.0

42.5

LEFT/FRONT/TOP RIGHT/REAR/BOTTOM

850 lbs.DES-( )-55-E/G/S

APPROXIMATE UNIT WEIGHT

ALL DIMENSIONS ARE IN INCHESDIMENSIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE

LEFT SIDE

3.0 TYP.

E9.0

27.4

9.0

6.1

21.0MAX

2.0

FRONT

G

AB

ACCESS

23.0MAX

REAR

C

DFF

RIGHT SIDE

14.01.5 TYP.

12.0

7.8

14.0

68.0

15.0

G

28.028.0

REACTIVATION

ELECTRICSTEAMGAS5.1

4.14.0

ED

6.16.18.6

6.6

F

6.66.6

4.6

C

29.4

B

5.55.5

29.429.4

A

12.212.818.1

UNIT DIMENSIONS

DES-1500-55DES-1150-55DES-750-55

Dimensional Data - DES-( )-55-E/G/S

TYPICAL CONFIGURATION - Standard Left Hand Orientation

5-3


STANDARD OUTLETS

INLET & OUTLET OPTIONS

5-4


INLET

(SIZE MAY VARY)DISCONNECTOPTIONAL KNIFE

ACCESSROTOR

DESICCANT

PROCESSDESICCANT


ACCESS ACCESSROTOR

AIR INLETREACTIVATION

FILTER

AIRPROCESS

ACCESSPROCESSAIR OUTLET

REACTIVATIONAIR OUTLET

ACCESSFILTER

HEATERACCESS

CONTROLDAMPERMANUAL

BLOWERREACTIVATION


REACTIVATION

AIR OUTLET

2X DRAINPLUGS

AIR INLET

PROCESS

MANUALDAMPER

CONTROL

AIR OUTLET

WINDOWDRIVE VIEW

TESTPORT(TYP)

DIFFERENTIAL

ELECTRIC BOX

PRESSUREGUAGE BOXES

SKID

PROCESS


PROCESSBLOWER

REACTIVATION

AIR INLET

REACTIVATION

REACTIVATIONHEATING OPTION

FILTER BOX

4.1TYP

53.0

48.0


1,290 lbs.DES-( )-77-E/G/S



32.0 MAX

REAR

C

D

2.0

23.0MAX

G

FRONT

A

B 76.0

12.0

12.0

5.7

E

LEFT SIDE

34.8

RIGHT SIDE

24.012.0

78.5

F

1.5 TYP.

11.0

14.0

LIFTING POINTS

6.6

F

*

E

6.61.76.61.7

5.5

DCB

5.1 39.9

5.610.5 40.539.910.5 5.5

DES-1500-77

UNIT DIMENSIONS

DES-3000-77DES-2250-77

22.222.219.7

A

* THIS BLOWER OUTLET EXTENDS 6.1" BEYOND CABINET.

GREACTIVATION

ELECTRICSTEAMGAS

13.1

26.126.1


4-75-5


STANDARD OUTLETS


5-6



DESICCANT

ACCESSROTOR

PROCESSDESICCANT


(SIZE MAY VARY)AIR OUTLETPROCESS

ACCESS ACCESSROTOR OPTIONAL KNIFE

DISCONNECT

AIR INLETPROCESS

FILTERACCESS



ACCESSFILTERACCESS

HEATER

LIFTING POINTS

CONTROLMANUAL DAMPER


GUAGE BOXES

TESTPORT (TYP)

DIFFERENTIAL PRESSURE

DRIVE VIEWWINDOW

PROCESSAIR OUTLET

BOXELECTRIC

AIR INLET

BLOWERPROCESS

REACTIVATION

FILTER BOX

HEATING OPTIONREACTIVATION

REACTIVATION

SKID

REACTIVATIONFILTER ACCESS

AIR OUTLETREACTIVATION

REACTIVATIONBLOWER

PROCESSAIR INLET

PLUGS2X DRAIN

2X4.5

2X3.0

32.0 MAX

DIMENSIONS ARE SUBJECT TO CHANGE WITHOUT NOTICEALL DIMENSIONS ARE IN INCHES

66.0

75.5

5.814.0

LEFT SIDE

61.0

41.8

16.0

E

2.0

32.1G

FRONT

A

B123.5

78.0

REAR

C

D

RIGHT SIDE

32.015.0

F

1.5TYP

20.0

11.0

RIGHT/REAR/BOTTOMLEFT/FRONT/TOP


DES-( )-106-E/G/S 2,900 lbs.

A

31.436.9

UNIT DIMENSIONS

DES-5500-106DES-4250-106DES-2750-106

4.61.810.512.9 54.236.9

G

GASSTEAMELECTRIC

REACTIVATIONF

4.64.6

ED

3.81.810.5

10.529.129.1

16.1

CB

54.254.2

11.712.9

5-7


STANDARD OUTLETS


5-8

2X6.8

32.0 MAX

(SIZE MAY VARY)

ACCESSROTOR

DESICCANT

PROCESSDESICCANT


73.5 ACCESSROTORACCESS


ACCESSFILTER

AIR INLETPROCESS

32.1MAX

2.0


G

B

A

132.0

78.0

D

C

2X1.8

16.0

6.0

AIR OUTLETPROCESS

47.1

67.5

18.0E


36.015.8

83.0

1.5 TYP.

14.0

24.0

F

LIFTING POINTS

FILTERACCESSACCESS

HEATER

MANUAL DAMPERCONTROL

ELECTRIC

OPTIONAL ROTARYDISCONNECTDIFFERENTIAL PRESSURE

DRIVE VIEWWINDOW

BOX

PROCESSAIR OUTLET

REACTIVATION

AIR INLET

FILTER BOXREACTIVATION

HEATING OPTIONREACTIVATION

SKID

PROCESSBLOWER

TESTPORT (TYP)GUAGE BOXES

AIR OUTLET


REACTIVATION

BLOWERREACTIVATION

DRAIN

AIR INLET

PROCESS

PLUGS

LEFT/FRONT/TOP RIGHT/REAR/BOTTOM3,650 lbs.DES-( )-122-E/G/S



FRONT

REAR

LEFT SIDE

RIGHT SIDE

24.1

G

42.142.1

REACTIVATION

ELECTRICSTEAMGAS

D E

0.43.43.4 4.5

4.54.5

FCB

65.0

65.065.0

A

44.2

37.937.9

14.4

12.912.9

10.5

10.510.5

UNIT DIMENSIONS

DES-3750-122DES-5500-122DES-7250-122



5-9


STANDARD OUTLETS


5-10

5-11

2X8.1

2X5.6

33.7 MAX

89.5


88.0

ROTORACCESS

DESICCANT

PROCESSDESICCANT

(SIZE MAY VARY)

ACCESSROTORACCESS

PROCESS

FILTERACCESS

AIR INLET

2.040.1MAX

G


B

A

154.0

93.5

C

D


48.018.3 1.5 TYP.

30.0

13.0

F

AIR OUTLETPROCESS

24.0

20.07.2

E

84.5

54.3

CONTROLMANUAL DAMPER

OPTIONAL ROTARY

GAUGE BOXES


REACTIVATIONHEATING OPTION

REACTIVATIONFILTER BOX

TESTPORT (TYP.) DIFFERENTIAL PRESSURE

ELECTRICBOX

WINDOWDRIVE VIEW

PROCESSBLOWER

SKID

DISCONNECT

LIFTING POINTS

ACCESSFILTER

ACCESSHEATER

PLUGSDRAIN

REACTIVATIONBLOWER

REACTIVATIONFILTER ACCESS


4,400 lbs.DES-( )-152-E/G/S



FRONT

REARRIGHT SIDE

LEFT SIDE

AIR OUTLET

PROCESS

AIR INLET

REACTIVATION

PROCESSAIR INLET

AIR OUTLET

REACTIVATION

GREACTIVATION

ELECTRICSTEAMGAS

* THIS BLOWER OUTLET EXTENDS 0.5" BEYOND CABINET.42.142.124.1

F

5.55.56.6

E

6.0

D

11.010.5

1.011.0 *

C

75.975.4

B

16.312.9

17.2 75.9

A

47.937.9

53.4DES-12000-152DES-9000-152DES-6000-152

UNIT DIMENSIONS




STANDARD OUTLETS


5-12

SATS offers duct mounted accessories for further conditioning the process air. Some applications may requirecontrol of temperature conditions as well as relative humidity levels. Duct mounted accessories are matched tothe customer’s requirements for temperature conditioning the supply air and then integrated with the dehumidifi-

cation system. Duct mounted accessories may be controlled by theDESICAiR® dehumidifier controller or by an external control system.

A Modular Auxiliary Removable Coil (MARC) unit can be furnished in thereturn air stream or the process air stream as needed for your applica-tion. A MARC cased coil unit holds cooling coils and/or heating coils forpre or post cooling/heating the process air. It replaces coil sections inexisting air handlers and is well suited for applications in tight spaces orwhere modular construction is required.

MARC unit cabinets may be constructed with either 16 gauge galvanizedsteel or 304 stainless steel. Double wall construction is available as anoption. A convenient access panel is provided for easy coil removal. Thecoils are constructed using a variety of optional materials making themsuitable for any application. Tubing is provided in copper, cupronickel,

stainless steel, carbon steel or admiralty brass depending on the needs of the application. A stainless steel drainpan is included for the collection of condensation. Contact your SATS DESICAiR® sales representative forinformation on including this option with your dehumidification system.

Duct Mounted Acessories

6-1

6-2

NOTES______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Notes

Globally close to you.Stulz-ATS, located in Frederick, MD USA, is part of The STULZGroup with headquarters in Hamburg, Germany and produc-tion facilities world wide. Our network of manufacturer’s rep-resentatives and sales partners span the globe, providing in-novative solutions to your unique environmental control needs.

North American Headquarters:

Copyright 07/04 - Form L-04-D-102Specifications are subjectto change without notice

Worldwide:

STULZ GmbHHolsteiner Chaussee 283, D-22457 HamburgTel: +49(40)55 85 269, Fax: +49(40)55 85 308, email: [email protected]

Global Locations:

North American Headquarters:

World Headquarters:

1572 Tilco Drive, Frederick, Maryland 21704, USA www.stulz-ats.comPhone: (301) 620-2033, Facsimile: (301) 662-5487, Email: [email protected]

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