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AquatowerST E E L C O O LI N G TOW E R engineering dataand specifications
Aquatower Steel Cooling Tower — Features and Benefits Proven Performance. CTI Certified. Plus SPX standsby its responsibility for reliable thermal performance. Wedesigned it. We rate it. We guarantee it! Induced-Draft Design. Save on fan power. The fan willoperate in a warm atmosphere even in winter, so you’llnever have to work on frozen mechanical equipment. Crossflow Design. Save on pump power because youonly pay to move the water to the top of the tower. Gravitydoes the rest. The mechanical equipment and waterdistribution system are out where you can easily maintainthem. All-Season Reliability. Aquatowers perform as specifiedin the heat of summer. They respond well to energymanagement techniques in the spring and fall and withappropriate fan controls, they can operate virtually ice-freein the dead of winter. Plus they offer simple maintenanceall year long. Proven Corrosion Protection. Thousands of usersover more than 65 years confirm the value of heavygalvanizing. And Marley’s G-235 is the most effectivegalvanizing used in the industry. PVC Film Fill with Integral Drift Eliminators and2Louvers. If you’ve ever had to replace deterioratedeliminators or louvers, you’ll appreciate this advantage.Integral honeycomb louvers keep the circulating waterinside your tower. Select Your Aquatower on Our Website. The MarleyUPDATE web-based selection software—available atspxcooling.com/update—provides Aquatower modelrecommendations based on your specific designrequirements Simple, Flexible Installation. Just mount the motor, beltsand belt guard, install the outlet connection that suits yourneeds—both side suction and bottom outlet are provided,complete with screens—and adjust the float valve and yourAquatower is ready for operation.
Aquatower Steel Cooling Tower — Features and Benefits3All Marley components are designed and selected to be apart of an integrated system. For example, the spray pattern fromnozzles and the pressure drop through drift eliminators bothaffect a fill’s heat transfer capacity. So, we include that impact inour thermal analysis. Drift eliminators must be effective at the airvelocities where fill is most efficient. So, we’ve carefully designedboth components to work together efficiently.How many other cooling tower companies can offer you thisassurance? They may use one brand of nozzle with brand of filland another manufacturer's drift eliminators. When they all cometogether, the whole may be less than the sum of the parts.Our total system approach assures that all the parts worktogether to provide you the greatest total performance. Andbecause we design specifically for cooling towers, all ourcomponents will provide many years of service with minimalmaintenance.Today’s Aquatower may be the most space/energyefficient cooling tower available. Your needs have dictatedconstant technological improvement. Thousands of Aquatowerusers enjoy the benefits of eight major redesigns and dozensof minor improvements in the past 65 years. For example, PVCfilm-fill enables the Aquatower to reject more heat per unit size.We also put the air inlet louvers and drift eliminators right on thefill sheets. This new arrangement saves you fan horsepower byimproving airflow through the tower.The Aquatower is a maintenance delight! You’ll appreciatethe way the Aquatower simplifies maintenance. No hidden spraysystems, tiny nozzles, or enclosed basins here! You can easilyreplace and align V-belts from outside the tower.All primary components of the Aquatower are open to view.You can easily remove any debris from the upper basin or nozzleswhile the tower is in operation.Heavy mill galvanizing on all steel components preventsbase metal corrosion. You won’t have to worry about paint chipsclogging your strainers and nozzles, because there is no paint toflake off. Heavy galvanizing also protects much better than paint.You’ll enjoy single source responsibility and reliability becausewe design and manufacture virtually all major cooling towercomponents.Every Aquatower cooling tower carries a full one-yearwarranty. The Aquatower you buy from us will work on your job orwe’ll make it right. Your warranty includes thermal performanceand every component of the tower. The SPX Cooling Technologieswarranty is your assurance of performance—for a full year.Above all, the Aquatower is readily available. You won’t haveto wait around—or accept second best—when you need a coolingtower. We maintain an impressive stock of completed towers at ourown plants. A growing number of local distributors can draw fromthat stock.Since 1947 the Marley Aquatower has inspired many imitators.Only SPX Cooling Technologies can offer you the original.Contact your local distributor or Marley representative. They’llbe glad to help you choose the proper model for your needs. Theycan also help you with your layout and piping.
Aquatower Steel Cooling Tower — Engineering Data: Schematic4DLWTOWER CL INLETHVERTICALDISCHARGE(OPTION-NOTE 3)MOTORAINLET PIPING(BY OTHERS)CSCL SIDE OUTLETUSE FORSTATIC LIFTTOWER COLLECTIONBASINBTOWER CL OUTLETECL BOTTOM OUTLETAIR INLET ELEVATIONTowerModelNominal Tonsnote1SIDE ELEVATIONDimensionsLWHABC note 2DESMotorhpPipingConnectionInletOutlet note 6490A82'-11 2"4'-2 8"5'-3 8"1'-3 16"6 8"2'-0"note 3note 64'-4"1 32"2" F490D102'-111 2"4'-2 7 8"5'-33 8"1'-313 16"67 8"2'-0"note 3note 64'-4"12"2" F492D223'-111 2"5'-0 3 4"7'-41 2"1'-5"91 2"4'-0"note 38"6'-5"14"4" M492G283'-11 2"5'-0 4"7'-4 2"1'-5"91 2"4'-0"note 38"6'-5"24"4" M493G365'-111 2"5'-1"7'-41 2"1'-5"91 2"5'-0"note 38"6'-5"24"4" M493H425'-111 2"5'-1"7'-41 2"1'-5"91 2"5'-0"8"6'-5"34"4" M494G515'-111 2"6'-55 8"9'-0"1'-1115 16"111 2"6'-0"10'-8"91 4"7'-101 2"26"6" MC494H575'-111 2"6'-55 8"9'-0"1'-1115 16"111 2"6'-0"10'-8"91 4"7'-101 2"36"6" MC494K685'-11 2"6'-5 8"9'-0"1'-11 16"111 2"6'-0"10'-8"19 4"7'-101 2"56"6" MC495K807'-111 2"6'-53 4"9'-0"1'-1115 16"111 2"7'-0"10'-8"91 4"7'-101 2"56"6" MC495M917'-111 2"6'-53 4"9'-0"1'-1115 16"111 2"7'-0"10'-8"91 4"7'-101 2"71 26"6" MC496K1119'-111 2"6'-61 8"9'-81 4"1'-113 16"111 2"9'-0"10'-1111 16"91 4"8'-7"56"6" MC496M1269'-111 2"6'-61 8"9'-81 4"1'-113 16"111 2"9'-0"10'-1111 16"91 4"8'-7"71 26"6" MC11173531131571. Nominal tons are based upon 95 F HW, 85 F CW, 78 F WB, and3 gpm/ton. The Marley UPDATE web-based selection softwareprovides Aquatower model recommendations based on specific designrequirements.2. Minimum clearance for adequate air supply. Consult your Marley salesrepresentative or your local distributor if this clearance is impractical foryour job.3. Vertical discharge hood is for applications in restrictive enclosuresor other locations where horizontal discharge is not desirable. CTICertification does not apply when this option is selected. Available onlyon models 494 and larger.4. Motors less than 1 hp are 115/230 volt, single-phase TENV. 1 hpthrough 7.5 hp motors are 230/460 volt, 3-phase TEFC.5. Motor, belt and belt guard ship uninstalled. Installation by others.6. Outlet sizes shown are side outlets. All models except 490A and 490Dhave connections for both side and bottom outlet. Install the desiredconnection and seal the unused opening with the coverplate provided.Pump suction should use side outlet. See page 9 for size and flowcapacities of bottom outlets.7. Overflow is a 2" F connection located in side of collection basin.8. Drain is a 2" F connection located in collection basin floor.9. Makeup valve connection is 3 4" M located in tower side.
Aquatower Steel Cooling Tower — Engineering Data: Support1"LFCL ANCHORHANCHOR CLBOLT1"HANCHOR CLBOLTW GTOWERCOLLECTIONBASIN5/8" DIAMETER HOLESBBOLTBOLTAIR INLET FACEHTOWERCOLLECTION BASINCL ANCHORCL ANCHORTOWERCOLLECTION BASINAIR INLET FACEHTOWERCOLLECTIONBASIN1"MIN. BEARING WIDTHAT EACH ANCHOR BOLT2"NORMALGAUGENORMALGAUGESUPPORT(BY OTHERS)SUPPORT(BY OTHERS)SECTION ATowerModelDimensionsLShipping WeightWFGHlbMaximumOperatinglbVIEW BMaximumOperating Loadat AnchorlbWind Load lbMax. VerticalMax. HorizontalReaction at Anchor Reaction at Anchor4902'-11 2"3'-4 8"2'-9 2"3'-0"2 16"4377561851801154923'-111 2"4'-15 8"3'-91 2"3'-6"313 16"74213963493552104935'-111 2"4'-15 8"5'-91 2"3'-6"313 16"98219954995252854945'-11 2"5'-6 8"5'-9 2"5'-0"31 16"139829487375553554957'-111 2"5'-61 8"7'-91 2"5'-0"31 16"175838539637454704969'-11 2"5'-6 8"9'-9 2"5'-0"31 16"20964751118810956404945'-111 2"5'-61 8"5'-91 2"5'-0"31 16"179833488377005154957'-11 2"5'-6 8"7'-9 2"5'-0"31 16"2133423310587455154969'-111 2"5'-61 8"9'-91 2"5'-0"31 16"25965251131310956401111111111Models with Vertical Discharge Hood Option1111"ANCHOR CLBOLTBOLTGA W5/8" DIAMETER HOLESLFCL ANCHORANCHOR CLBOLTBOLT1"51. Use this bulletin for preliminary layouts only. Obtain current drawings fromyour Marley sales representative or your local distributor.2. Purchaser to provide tower supports complete with holes and bolts foranchorage. All supports must be framed flush and level at top. Maximumdeflection to be 1/360th of span, not to exceed 1 2".3. Maximum weight occurs with basin full to overflow level at shutdown.Actual operating weight varies with flow and piping scheme.4. Wind loads are based on 30 psf and are additive to operating loads.Reactions due to wind loads exceed those resulting from seismic loadsbased on the 1997 UBC code, Zone 4 and an Importance Factor of 1.00per Section 1634—Towers Not on a Building.Use this data for preliminary layouts only. Obtaincurrent drawing from your Marley sales representative.UPDATE web-based selection software, availableat spxcooling.com/update provides Aquatower modelrecommendations based on customer’s specificdesign requirements.
Aquatower Steel Cooling Tower — Construction and Components6WATER DISTRIBUTION SYSTEMFILL/LOUVERS/DRIFT ELIMINATORSWarm water flows through external piping (not includedwith the tower) into a splash box at the top of the Aquatower.This splash box contains the incoming water and helps provideuniform water distribution. Water then flows by gravity from thebasin through nozzles located over the fill. Hot water distributionbasin covers are provided as standard equipment to keep thedistribution basin free from airborne debris and to reduce thelikelihood of biological growth.Marley MX Fill features integral louvers and drift eliminators,designed to minimize resistance to airflow. This patentedarrangement prevents water from escaping the fill, assuring properheat transfer throughout wide variations in airflow. Users find MXfill operates ice-free even in extremely cold weather.The thermoformed PVC fill sheets withstand hot watertemperatures as high as 125 F. Fill sheets are immune tobiological and corrosive decay and their flame spread rating is lessthan 25 per ASTM E-84. Galvanized structural tubes support andstabilize the fill. They also hold the bottom of the fill sheets abovethe cold water basin floor to simplify basin cleaning. Removable1" x 1" mesh galvanized air inlet screens keep larger airbornetrash out of the collection basin and fill area.Eliminator air-seal removed showing nozzle distribution area above fillAll Aquatowers use Marley “Spiral Target” nozzles. Theseinert polypropylene nozzles are evenly spaced throughout thedistribution basin to assure uniform water distribution over allportions of the fill. Their large openings resist clogging. Nozzlesare easy to remove and replace if the design water flow rate needsto be changed.MX FillCOLD WATER COLLECTION BASINThe Aquatower’s collection basin simplifies basin cleaning,and assures proper outflow. Water flows from the elevated areaunder the fill into the basin’s rear depressed section, where sidesuction piping connects. A bottom outlet is also available forgravity flow applications.Marley Spiral Target distribution nozzleStandard equipment on each tower basin includes: a screenedsuction connection; a threaded overflow connection, a threadedand plugged drain connection and a float-operated make-up valve.Models 492 through 496 also include a bottom outlet conformingto 125# flange specifications. A blank cover plate is provided toseal the outlet opening if not used.
Aquatower Steel Cooling Tower — Construction and Components7MECHANICAL EQUIPMENTBelt-drive propeller fans ensure design airflow at minimumhorsepower. Fans are supported by a stainless steel fan shaft ina cast iron, oil-lubricated, tapered roller bearing assembly withremote oil reservoir. For ease of maintenance all drive componentsare accessible from outside the tower.Fan drive motor showing adjustable base and belt guardHOISTING AND HANDLINGHoisting instructions on each tower explains how to use aspreader-bar and slings beneath the cold water basin floor to hoistthe Aquatower. The tower’s design also allows easy handling with aforklift.SAFETYStandard Aquatower safety features include fan guards and beltguards. Fan guards consist of welded heavy gauge steel wire hoopsand spokes, hot dip galvanized after fabrication. The galvanizedsteel belt guard encloses both belts and pulleys. Guards are easilyremoved for servicing.Fan guard is easily removed for access to fan and drive beltsCONSTRUCTION AND FINISHFan drive motors are TEFC designed specifically for coolingtower use. Standard motor horsepower appears in the table onpage 4. Other types of motors are available. Typical options appearunder Optional Accessories on page 10.CAUTIONThe cooling tower must be located at such distanceand direction to avoid the possibility of contaminateddischarge air being drawn into building fresh airintake ducts. The purchaser should obtain theservices of a Licensed Professional Engineer orRegistered Architect to certify that the location ofthe cooling tower is in compliance with applicable airpollution, fire and clean air codes.Aquatowers offer the corrosion protection of G-235 galvanizedsteel—providing a zinc thickness of 2.35 oz/ft per ASTM A-653—providing long term protection for the steel. Assembly hardware isalso galvanized.2
Aquatower Steel Cooling Tower — Engineering Data: Freeze Prevention8When the ambient air temperature falls below 32 F, the waterin a cooling tower can freeze. Marley Technical Report#H-003 “Operating Cooling Towers in Freezing Weather”describes how to prevent freezing during operation. Ask yourMarley sales representative for a copy or download from ourwebsite.INDOOR TANK METHODWater collects and is stored in the cold water basin duringshutdowns, and may freeze solid. You can prevent freezing byadding heat to the water left in the tower or, you can drain thetower and all exposed piping at shutdown.The table on page 9 lists typical drain-down capacitiesfor all Aquatower models. Although we do not produce tanks,many of our representatives offer tanks supplied by reputablemanufacturers.ELECTRIC BASIN HEATERSTwo types of automatic basin heater systems are availablebased on your site conditions and preferences.You may choose a heater system consisting of thesecomponents (shipped separately for installation by others): Stainless steel electric immersion heater element(s). Threadedcouplings are provided for installation.NEMA 4 enclosure containing these components:–Magnetic contactor to energize heater.–Transformer to convert power supply to 24 volts forcontrol circuit.– Solid state circuit board for heater control and low-water cutoff.Enclosure may be mounted on the side of the tower.Control probe to monitor water temperature and water level.Threaded couplings are provided for installation.Or you may prefer a pre-assembled submersible tank-typeheater which requires no tower modification and can plug into astandard grounded 3-prong 120V outlet.The Incoloy heater element was chosen for its long life insubmerged environments. A built-in thermostat senses watertemperature and controls the supply of electricity to maintainproper water temperature. A built-in safety switch cuts off powerwhenever the element is exposed to air. The element mounts inthe tower basin on a stainless steel plate.Any exposed piping that is still filled with water at shutdown—including the makeup water line—should be electrically traced andinsulated (by others).With this system, water flows from an indoor tank, through theload system, and back to the tower, where it is cooled. The cooledwater flows by gravity from the tower to the tank located in aheated space. At shutdown, all exposed water drains into the tank,where it is safe from freezing.The amount of water needed to successfully operate thesystem depends on the tower size, GPM and the volume of watercontained in the piping system to and from the tower. You mustselect a tank large enough to contain those combined volumes—plus a level sufficient to maintain a flooded suction on your pump.Control makeup water according to the level where the tankstabilizes during operation.You should always use a bottom outlet for this type of pipingsystem. The table on page 9 lists the flow capacities for bottomoutlets.Basin Heater SelectionTowerModel 10 F Ambient-10 F AmbientTank HeaterComponentHeaterTank HeaterComponentHeater4901.5 kW3 kW1.5 kW3 kW4921.5 kW3 kW1.5 kW3 kW4931.5 kW3 kW2 @ 1.5 kW3 kW4942 @ 1.5 kW3 kW2 @ 1.5 kW3 kW4952 @ 1.5 kW3 kW3 @ 1.5 kW4.5 kW4963 @ 1.5 kW4.5 kW4 @ 1.5 kW6 kW1. Required kW is the amount of heat needed to maintain 40 F basinwater temperature at the indicated ambient air temperature.2. Tank heaters shown are 120 volts, single-phase.3. Component heaters shown are 480 volts, three-phase. Options orspecial heater selections may add several weeks todelivery.4. Heaters do not operate continuously. Heaters cycle on and offautomatically as basin water temperature dictates.5. Contact your Marley sales representative for selections appropriate forother ambient conditions than those shown here.
Aquatower Steel Cooling Tower — Engineering Field AssemblyFIELD ASSEMBLYDrain-Down CapacityTower ModelMaximum Drain-DowngallonsRange of Tower Design GPM49049249349415 - 262827 - 513052 - 853386 - 1533621 - 534954 - 925493 - 15160152 - 2116533 - 837784 - 14484The following table shows the sizes and weights of thelargest Aquatower components for each model. You can use thisinformation to plan your rigging and transportation needs.Unassembled tower shipment may add 3 to 5 weeks tonormal lead times. Your Marley sales representative will be gladto help you plan for your unique needs.94239 - 32810160 - 141134ComponentSize inchesWeight lb142 - 227145Collection Basin End12 x 13 x 3615228 - 376162Collection Basin Floor3 x 30 x 3223377 - 563178Front Panel2 x 36 x 4421Casing Panel2 x 40 x 5243Distribution Basin8 x 16 x 3218Collection Basin End14 x 16 x 4824Collection Basin Floor3 x 36 x 4437Front Panel2 x 48 x 6852Casing Panel2 x 26 x 6334Distribution Basin8 x 16 x 4424Collection Basin End14 x 16 x 7237Collection Basin Floor3 x 36 x 6856Front Panel2 x 37 x 7235Casing2 x 26 x 6334Distribution8 x 16 x 6837Collection Basin End18 x 18 x 7247Collection Basin Floor4 x 34 x 6856Component Sizes and WeightsTower Model490A490B182193 - 270496If you choose to assemble your Aquatower at the job site,your Aquatower will be shipped unassembled with completeassembly instructions.145 - 23882 - 1924959192271 - 513219514 - 763241104 - 196228197 - 286243287 - 497271498 - 963320492493Volumes shown are maximums for the GPM ranges indicated. Actualvolumes will usually be less. Contact your local Marley sales representativefor more specific information.494Bottom Outlet Maximum GPMOutlet 350naFront Panel2 x 44 x 7241Casing Panel2 x 40 x 7663Distribution Basin8 x 28 x 6852Optional Discharge Side2 x 41 x 7737Optional Discharge Floor9 x 45 x 684663Collection Basin End18 x 18 x 96Collection Basin Floor4 x 34 x 9275Front Panel2 x 44 x 965663494140310550625Casing2 x 40 x 76495140310550850Distribution Basin8 x 28 x 9270496140310550860Optional Discharge Side2 x 41 x 7737Optional Discharge Floor9 x 45
Every Aquatower cooling tower carries a full one-year warranty. The Aquatower you buy from us will work on your job or we’ll make it right. Your warranty includes thermal performance and every component of the tower. The SPX Cooling Technologies w
