Marley Quadraflow fiberglass cooling tower engineering data and
Contents
1. 35 5186 R R 3 3 the ANCHOR 6 5 5 ANCHOR M 4 5 Va BOLT 213he 2 0 1 4 BOLT ANCHOR ANCHOR a BOLT P t BOLT 9 5 he x 5 x gt 8 99 ZS n E Edi E s 4 5 14 434 le ps Y R 2 ot Fa 40 Xm 1 R PM 5 x R E 4 5 Va 29 e xn E e gt 38 a L SEE SUPPORT DETAIL 2 A7 2 5 5 MIN 3 3 ie TYPICAL 12 PLACES T P4 b 5 z Sa le g g Nc SS L e e SUPPORT FLAN TWO CELL SUPPORT FLAN MULTICELL Dimensions Model M P R 5 24120 14 1 ve 13 7 we 6 8 19 1 6 1 38 24290 14 1 ve 13 7 we 6 8 4 19 1 7 6 38 Quadraflow Cooling Tower Engineering Data SOUND CONTROL Sound produced by a QuadraFlow tower operating in an unob structed environment will meet all but the most restrictive noise limita tions and will react favorably to natural attenuation Where the tower has been sized to operate within an enclosure the enclosure itself will have a damping effect on sound Sound also declines with distance by about 5 dBA each time the distance doubles Where noise at a critical point is likely to exceed an acceptable limit several options are available listed below in ascending order of cost impact n many cases noise concerns are limited to nighttime when ambient noise levels2. Quadraflow Cooling Tower Engineering Data Support M 4 5 Va ANCHORG ANCHOR BOLT BOLT 2 da zo g lt 4 5 14 g 1 e L ps P M le E e e e lt 7 4 5 1a m nd a T e mM i oO L SEE SUPPORT DETAIL gt TYPICAL 12 PLACES 4 MIN 1 MIN 2 1 MIN BEAM 1 1 MIN e 2 4 MIN 3 A L t MIN ANCHOR BOLT BEAM SUFFORT DETAIL Beam support option 4 by 4 minimum bearing area to be provided by others at each anchor bolt location Beam may be rotated 90 24000 Dimensions Maximum Wind Seismic Loads Ib Maximum Operatin Operin Model dn IC I Load at Max Vert Max Horiz M P ib Anchor Reaction at Reaction at Ib Anchor Anchor 24121 24127 14 1 18 7 Ye 48825 7355 4090 14844 1330 5852 24221 24995 14 1 18 7 48845 7610 7800 19809 1815 6105 4 MIN 1 MIN 1 MIN r 1 MIN ANCHOR BOLT COLUMN SUPPORT DETAIL 2 4 MIN 1 MIN COLUMN Column pier support option 4 by 4 minimum bearing area to be provided by others at each anchor bolt location NOTE 1 Dimensions and details shown are for preliminary layout only O
3. ing where vacuum pumps or barometric condensers are used causes fill plugging which may be intensified by algae ALTERNATIVE SELECTIONS In addition to the QuadraFlow SPX Cooling Technologies offers a full scope of products in various designs and capacities to meet the special demands of specific applications CORROSION RESISTANCE Stainless steel construction Marley stainless steel towers are available in both crossflow and counterflow configurations to solve site related problems They offer maximum resistance to corrosion while meeting stringent building codes PVC film type fill Sigma Series available in wood fiberglass HDG steel or stainless steel structure Field erected for medium to large proj ects Available in a wide range of sizes Efficient PVC film fill SPLASH FILL TOWERS NC Alpha factory assembled splash fill cooling tower Excel lent in dirty water situations SPECIAL INSTALLATION MS Series custom designed to fit your concrete enclosure PVC film type fill and Marley industrial quality internal compo nents provide years of trouble free service Quadraflow Cooling Tower Engineering Data Freezing Weather Operation When the ambient air temperature falls below 32 F the water in a cooling tower can freeze Marley Technical Report Operating Cooling Towers in Freezing Weather describes how to prevent freezing during operation Ask your Marley sales representative for a
4. structural columns hot water distribution basins basin covers op deck fan cylinder and access door shall be formed of inert fiber reinforced polyester FRP either molded or pul ruded All hardware with the exception of he supporting grillage shall be fabricated of 300 series stainless steel This shall include the mechanical equipment support structure fan guards and all bolts nuts and fasteners used in the construction of he tower Design criteria for the tower structure and anchorage shall be 30 psf 1 44 kPa wind load Tower anchorage shall also meet a 1g horizontal seismic load The tower shall be capable of withstand ing water having a pH of 6 5 to 8 0 a chloride content NaCl up to 750 ppm a sulfate content SO4 up to 1200 ppm a calcium content CaCO3 up to 800 ppm silica SiOo up to 150 ppm and design hot water temperatures up to 125 F 51 7 The circulating water shall con tain no oil grease fatty acids or organic solvents The specifications as written are intend ed to indicate those materials that will be capable of withstanding the above water quality in continuing service as well as the loads described in paragraph 4 1 They are to be regarded as minimum requirements Where component materials peculiar to individual tower designs are not specified the manufacturers shall take the above water quality and load carrying capabilities into account in the selection of their mate
5. MIN 1 MIN 2 1 MIN BEAM oT 1 MIN 2 4 MIN 2 4 MIN BOLT 1 MIN BEAM SUPPORT DETAIL Beam support option 4 by 4 minimum bearing area to be provided by others at each anchor bolt location Beam may be rotated 90 NOTE ANCHOR BOLT COLUMN SUPPORT DETAIL 1 MIN COLUMN Column pier support option 4 by 4 minimum bearing area to be provided by others at each anchor bolt location 1 Dimensions and details shown are for preliminary layout only Obtain current engineering drawings or CAD files from your Marley sales representative for final layout 2 The base of each QuadraFlow tower consists of a grid of galvanized steel beams as part of the tower assembly Minimal additional support is required at the anchor bolt locations Additional support design construction plus anchor bolt hardware by others 58 diameter anchor bolts are required Projection of anchor bolts is 2 12 maximum 1 minimum Anchor points must be framed flush and level at top Maximum beam deflection to be 1 360 of span not to exceed 7 at anchor bolts Maximum operating weight occurs with basin full to overflow level Actual operating weight varies with GPM and piping scheme Operating water levels in excess of recommended levels can result in loads exceeding values shown Consult your Marley sales representative for additional inst
6. and provides step by step instructions designed to result in a correctly assembled tower Quadraflow Cooling Tower Specifications Options 09 Specifications Specification Value Control Options Control System Add the following paragraph in the Mechanical Equipment section Each cell of the cooling tower shall be equipped with a UL listed control system in a NEMA 8R or 4X outdoor enclosure capa ble of controlling single speed or two speed motors as required and designed specifically for cooling tower applications The panel shall include a main fused dis connect with an external operating han dle lockable in the off position for safety Across the line magnetic starters or solid state soft start starters as required shall be controlled with a thermostatic or solid state temperature controller Door mount ed selector switches shall be provided to enable automatic or manual control and wired for 120VAC control Control circuit to be wired out to terminal blocks for field connection to a remote vibration switch and for access to extra 120VAC 50VA control power overload trip alarms and remote temperature control devices The temperature controller shall be adjustable for the required cold water temperature If a thermostatic controller is used it shall be mounted on the side of the tower with the temperature sensing bulb installed in the cold water basin using a suspension mounting bracket If a solid state tem perature c
7. tower is in compliance with applicable air pollution fire and clean air codes Quadraflow Cooling Tower Engineering Data TYPICAL APPLICATIONS Although the OuadraFlow is a premium value cooling tower targeted for those applications that demand a high degree of corro Sion resistance as well as an aesthetically pleasing appearance it is routinely applied in virtually all normal systems requiring cold water for the dissipation of heat Some common applications include Condenser water service for air conditioning and refrigeration systems The OuadraFlow is especially adapt able to Free Cool ing applications Jacket water cooling for engines and air compressors Chemical and industrial processes Batch cooling Welder cooling Plastic industry processes Dairy citrus and other food industry processing where water contamination is not likely to occur MARLEY CONTROLS SPX Cooling Technologies understands the capabilities and limi tations of cooling towers and offers control systems that will assure you the greatest benefit from your tower Ranging in sophistication from standard fan starters and disconnects to Programmable Logic Controllers that work in conjunction with your building or process system these controls provide excellent energy management Ask for Marley Technical Report H 001 A Cooling Tower Energy and Its Management For those of you who use your tower in the Free Cooling mode Marley Technical Rep
8. 3 19 8 4 7 13 7 29 2 10 4 2 44 4 5 15 8 10 n 21220 186 211 12 8 5 85 8 5 2 10 2 4 4 10 15 8 10 w 21320 204 256 10 8 6 9 9 9 10 4 2 4 4 10 20 8 10 22120 243 304 14 0 8 6 8 6 w 2 7 28 7 10 20 10 12 29990 312 425 14 0 9 10 4 910 2 79 2 8 74 15 40 10 12 23190 390 475 16 8 9 10 9 9 3 29 2 8 8 9 20 40 2 8 14 23290 419 548 16 8 11 234 11 1 e 3 29 2 8 8 e 20 50 2Q 8 14 pe PLAN MOTOR LOCATION UP NOTE 5 TOP OF m FAN GUARD EI ACCESS COVER EN DRAIN s 2 DIA H USEFOR STATIC LIFT WI 1 EN TOP OF SUPPORT SUPPORT BY OTHERS OVERFLOW d _ 4 DIA ERIT Uy 2 6 MIN ROOF OR COLLECTION G GRADE OUTLET BASIN B 4 OUTLET ELEVATION Use this data for preliminary layouts only Obtain Maximum Sump Capacities gpm current drawing from your Marley sales representative Oe DANAS Model 6 10 12 m UPDATE web based selection software available at 51060 PE mm H E spxcooling com update provides Ouadraflow model Er 22000 875 1400 20925 recommendations based on customer s specific 23000 960 1500 2180 2610 design requirements NOTE 1 Dimensions shown are for preliminary layout only Obtain current 5 21 000 and 22000
9. 5 vibration switch will be provided The require ment for manual reset assures that the cool ing tower will be visited to determine the cause of excessive vibration E The basin heater components described at left represent our recommendation for a reliable automatic system for the prevention of basin freezing They are designed for installation at the jobsite Submerged in basin water in which zinc ions are present copper immersion heaters must not be used Insist upon stainless steel The ambient air temperature that you insert in the specifications should be the lowest 1 level of winter temperature prevalent at site E Marley VFD drive systems are designed to combine absolute temperature control with ideal energy management The cooling tower user selects a cold water temperature and the drive system will vary the fan speed to maintain that temperature Precise temperature control is accomplished with far less stress to the mechanical equipment components The improved energy management provides fast payback Indeed many utilities offer generous rebates for users having installed VFD drives Quadraflow Cooling Tower Specifications Options 24 Specifications Specification Value tions and shall catch a fan spinning in the forward or reverse direction with out tripping VFD panel construction shall include a main disconnect with short circuit and thermal overload pro tection with external operating handle lockable in th
10. Cr ENGINEERING DATA AND SPECIFICATIONS Marley Quadraflow Cooling Tower Contents Engineering Data Schematic 5 Support 5 Environmental 13 Application 14 Freezing Weather Operation 15 Specifications Base Base 16 Thermal Performance 16 Performance Warranty 16 Construction 17 Fill Louvers and Drift Eliminators 18 Mechanical Equipment 19 Hot Water Distribution System 20 Casing Top Deck and Fan Cylinder 20 Cold Water Collection Basin 20 Warranty 21 Scope of Work 21 Specifications Options Control Options Control System 22 Vibration Limit Switch 23 Basin Heater 23 Variable Speed Drive 25 Quadraflow Cooling Tower Engineering Data Schematic 4 The Marley QuadraFlow is a molded fiberglass factory fabricated field erected general purpose crossflow cooling tower designed to serve all normal cooling water systems as well as those systems whose water quality would jeopardize the life expectancy of a galvanized cooling tower In some locations the quality of the circulating water is very poor This can be because of the character of the makeup water brackish acidic alkaline etc or because of contamination by the product being cooled In many cases it is because of poor air quality at the site Cooling towers being ideal air washers the cooling tower water soon mimics the quality of the air The left hand column of pages 15 thru 23 provides text for the various specification paragraphs wherea
11. acious ple num between banks of fill for easy access to all of the tower s internal components Counterflow towers one manufacturer offers nothing else provide only cramped and awkward access to the mechanical equip ment the drift eliminators and the water distribution spray system and the very small access door is up near the top of the tower CTI Certification means that the cooling tower has been tested under operat ing conditions and found to perform as rated by the manufacturer under those circumstances It assures the buyer that the tower is not intentionally or inadver tently undersized by the manufacturer E However CTI certification alone is not sufficient to assure you that the cool ing tower will perform satisfactorily in your situation Certification is established under relatively controlled conditions and cooling towers seldom operate under such ideal circumstances They are affected by nearby structures machinery enclosures effluent from other sources etc Responsible and knowledgeable bidders will take such site specific effects into consideration in selecting the cooling tower but the specifier must insist by the written specification that the designer manufacturer guarantee this real world performance Any reluctance on the part of the bidder should cause you some concern Quadraflow Cooling Tower Specifications Base T Specifications Specification Value Construction The cold water basin
12. all allow for the installation of warm water bypass lines as well as basin water level equalization lines between towers if necessary The cooling tower manufacturer shall provide draw ings to facilitate the installation of these features by others The cold water basin and tower shall be supported by a structural beam assembly of welded sections provided and installed by the cooling tower manufacturer The assembly sections shall be hot dip galva nized after fabrication E Gravity flow distribution basins are a feature of crossflow type towers result ing in operating pump heads of from 10 to 20 feet less than that encountered in counterflow towers with their pressurized spray systems Also these basins are out where they can be easily inspected even maintained while the tower is in operation Spray systems of counterflow towers sandwiched between the top of the fill and the drift eliminators are extremely awkward to access and maintain E Marley Models 21000 thru 23000 are equipped with the fan guard specified 24000 Models have 5 0 high flared velocity recovery fan cylinders Bi Everything within the basin is of inert noncorroding material Fiberglass towers can require very complicated support systems To avoid errors in design and fabrication the steel in immediate support of the basin should be provided by the cooling tower manufacturer This should simplify the foundation require ments such that primary support
13. ally out of tower a sufficient distance AN ROOF OR to overcome all head losses within outlet piping IE 2 6 MIN GRADE system COLLECTION 1 4 Vie l BASIN iiis OUTLET SUMP DRAIN 1 2 DIA ELEVATION NOTE 1 Dimensions shown are for preliminary layout only Obtain current engineering drawings or CAD files from your Marley sales representative for final layout 2 Nominal tons are based upon 95 F HW 85 F CW 78 F WB and 3 gpm ton 3 Makeup connection may be 1 or 2 diameter depending upon tower heat load water pressure and desired connections All table data is per cell All piping loads must be supported independent of tower All piping and supports are by others Locating inlet riser directly behind motor is not recommended due to restrictions placed on motor access and removal Outlet sump may be installed rotated 90 or 180 provided outlet piping will clear tower support Quadraflow Cooling Tower Engineering Data Schematic FLAN TWO CELL Two cell installations may conform to either of the two schemes shown here Choose the pattern that best fits into your available space Use this data for preliminary layouts only Obtain current drawing from your Marley sales representative UPDATE web based selection software available at spxcooling com update p
14. alue Mechanical Equipment Fan s shall be propeller type incorporat ing heavy duty blades of cast aluminum or high strength inert composite material Fan blades shall be individually adjustable and replaceable Fan s shall be driven through a rightangle industrial duty oil lubricated geared speed reducer that requires no oil changes for the first five 5 years of operation Speed reducers employing pulleys and belts will not be permitted Motor s shall be _ maximum TEFC 1 15 service factor and specially insulated for cooling tower duty Speed and electrical characteristics shall be 1800 1800 900 RPM single winding phase hertz volts Motor shall be located outside the humid interior of the tower within an alcove in the tower s corner structure The motor shall be connected to the geared speed reducer by a tubular stainless steel driveshaft equipped with neoprene flexible coupling elements A neoprene oil gauge and drain line shall extend from the gear reducer to the motor enclosure and shall be equipped with an easily visible oil sight glass The mechanical equipment for each cell shall rest on a rigid stainless steel box beam assembly that resists misalign ment between the motor and the gear reducer E Propeller type fans require only half the operating hp of blower type fans However they should be readily adjustable to permit compensation for jobsite conditions that may tend to overload the mot
15. are lower and neighbors are trying to Sleep You can usually resolve these situations by using two speed motors in either 1800 900 or 1800 1200 RPM con figuration operating the fans at reduced speed without cy cling after hours The natural nighttime reduction in wet bulb temperature makes this a very feasible solution in most areas of the world but the need to avoid cycling may cause the cold water temperature to vary significantly The Marley Variable Speed Drive automatically minimize the tower s noise level during periods of reduced load and or re duced ambient temperature without sacrificing the system s ability to maintain a constant cold water temperature This is a relatively inexpensive solution and can pay for itself quickly in reduced energy costs Where noise is a concern at all times for example near a hos pital the best solution is to oversize the tower so it can oper ate continuously at reduced 1200 or 900 RPM motor speed Typical sound reductions are 7 dBA at fan speed or 10 dBA at fan speed Extreme cases may require inlet and discharge sound attenua tor sections however the static pressure loss imposed by at tenuators may necessitate an increase in tower size This is the least desirable approach because of the significant cost im pact and because of the obstruction to normal maintenance procedures Your Marley sales representative will help you meet your sound requirements ENCLOSURES O
16. at you deal directly with those commercial suppliers for warranty satisfaction Quadraflow Cooling Tower Specifications Base M Specifications Specification Value Hot Water Distribution System An FRP distribution basin shall receive hot water piped to each cell of the tower Each basin shall include one or more inlet holes and grommets to accom modate appropriately sized inlet piping Removable interchangeable polypro pylene nozzles installed in the floor of these basins shall provide full coverage of the fill by gravity flow The hot water basin shall be covered by removable FRP covers that keep out sunlight and give a finished appearance to the tower Casing Top Deck and Fan Cylinder Tower corner casings top deck and fan cylinder shall be fabricated of molded Fan cylinders less than 60 1524 mm in height shall be equipped with a conical non sagging removable fan guard fabricated of welded e 8 mm and 7 gauge stainless steel rods Cold Water Collection Basin The cold water basin shall be molded of FRP and sealed watertight It shall include a float operated makeup valve a 4 102 mm diameter overflow connec tion and a depressed FRP sump com plete with a stainless steel debris screen The top of the basin to the base of the fill shall be covered with removable heavy gauge stainless steel screens to keep airborne leaves and debris out of the cir culating water system The basin design sh
17. btain current engineering drawings or CAD files from your Marley sales representative for final layout 2 The base of each QuadraFlow tower consists of a grid of galvanized steel beams as part of the tower assembly Minimal additional support is required at the anchor bolt locations Additional support design construction plus anchor bolt hardware by others 58 diameter anchor bolts are required Projection of anchor bolts is 2 maximum 1 minimum Anchor points must be framed flush and level at top Maximum beam deflection to be 1 360 of span not to exceed 1 at anchor bolts Maximum operating weight occurs with basin full to overflow level Actual operating weight varies with GPM and piping scheme Operating water levels in excess of recommended levels can result in loads exceeding values shown 4 Consult your Marley sales representative for additional instructions if tower is to be supported directly on vibration isolators 5 Wind loads are based on 30 psf and are additive to operating loads Reactions due to seismic loads are calculated on the basis of a 1g lateral load and are additive to operating loads Quadraflow Cooling Tower Engineering Data Support T
18. can be accomplished by piers if desired Not being in contact with the cooling tower water the supports need not be stainless steel but they should be hot dip galvanized after fabrication 5 aii ammi Quadraflow Cooling Tower Specifications Base 1 Specifications Specification Value Warranty The manufacturer shall warrant the entire tower against failure in normal operation for a period of five 5 years following shipment to the site Scope of Work The cooling tower manufacturer shall be responsible for the design fabrication and delivery of materials to the project site and for the erection of the tower over primary supports provided at the proper elevation by others Unless other wise specified all piping pumps controls and electrical wiring will be outside the cooling tower manufacturer s scope of work E A tower that is capable of meeting these specifications should easily be war rantable for five years Please insist upon it And insist that the warranty cover all the tower including the motor gear reducer V belts if you allow them and all other pieces of mechanical equipment Wi To assure proper fit up of parts and alignment of mechanical equipment it is recommended that erection be made a part of the cooling tower manufacturer s contract In any case a comprehensive illustrated Marley assembly manual will be provided which pictorially identifies the tower components
19. ccasionally cooling towers are located inside architectural enclosures for aesthetic reasons Although QuadraFlow towers adapt well to enclosures the designer must realize the potential impact of a poorly arranged enclosure on the tower s performance and operation The designer must take care to provide generous air inlet paths and the towers fan cylinder discharge height should not be lower than the elevation of the top of the enclosure Obtain a copy of Marley Technical Report 4 External Influences on Cooling Tower Performance from your Marley sales representative or download at spxcooling com Environment As suggested in the aforementioned Technical Report it may also be advisable to specify a design wet bulb temperature 1 F higher than normal to compensate for potential recirculation initiated by the enclosure You ll benefit from discussing your project with your Marley sales representative SYSTEM CLEANLINESS Cooling towers are very effective air washers Atmospheric dust able to pass through the relatively small louver openings will enter the circulating water system Increased concentrations can intensity system maintenance by clogging screens and strainers and smaller particulates can coat system heat transfer surfaces In areas of low flow velocity such as the cold water basin sedimentary deposits can provide a breeding ground for bacteria In areas prone to dust and sedimentation you should consider install
20. ce conditions when the tower is installed according to plan If because of a sus pected thermal performance deficiency the owner chooses to conduct an on site thermal performance test under the supervision of a qualified disinterested third party in accordance with CTI or ASME standards during the first year of operation and if the tower fails to perform within the limits of test tolerance then the cooling tower manufacturer will pay for the cost of the test and will make such corrections as are appropriate and agree able to the owner to compensate for the performance deficiency E Your specification base establishes the type configuration base material and physical limitations of the cooling tower to be quoted During the planning and layout stages of your project you will have focused your attention on a cool ing tower selection that fits your space allotment and whose power usage is acceptable Limitations on physical size and total operating horsepower avoid the introduction of unforeseen operational and site related influences Specifying the number of cells and the maximum fan hp cell will work to your advantage Fans of induced draft towers are in the warm non freezing leaving airstream of the tower They accelerate the moist air upward to prevent recirculation from degrading the tower s thermal performance In forced draft towers the reverse is true and recirculation happens routinely Crossflow towers have a sp
21. copy During shutdown water collects in the cold water basin and may freeze solid You can prevent freezing by adding heat to the water left in the tower or you can drain the tower and all exposed pipework at shutdown ELECTRIC BASIN HEATERS An automatic basin water heater system is available consisting of the following components Stainless steel electric immersion heater s mounted on stainless steel plates on the floor of the collection basin NEMA 4 enclosure containing Magnetic contactor to energize heater Transformer to convert power supply to 24 volts for control circuit Solid state circuit board for temperature and low water cutoff Enclosure may be mounted on the side of the tower Control probe in the collection basin to monitor water temperature and level Note any exposed piping that is still filled with water at shutdown including the makeup water line should be electrically traced and insulated by others INDOOR STORAGE TANK With this type of system water flows from an indoor tank through the load system and back to the tower where it is cooled The cooled water flows by gravity from the tower to the tank located in a heated space At shutdown all exposed water drains into the tank where it is safe from freezing Basin Heater kW Selection Ambient Phase a
22. e off position for lock out tag out safety procedures A service switch directly ahead of the VFD shall be provided for voltage isolation during VFD maintenance An integrated full voltage non reversing bypass starter shall be furnished allowing fan motor operation if VFD has failed The VFD system shall receive a speed reference signal from the building management system monitoring the cooling tower cold water temperature As an option to receiving the speed reference signal from a building management system the drive must have the capability to receive a 4 20 mA temperature signal from an RTD transmitter When using an RTD for temperature monitoring and speed control the VFD shall have an internal Pl regulator to modulate fan speed maintaining set point tempera ture The drive s panel shall display the set point temperature and cold water temperature on two separate lines The bypass shall include a complete elec tromechanical magnetic bypass circuit with the capability to isolate the VFD when in the bypass mode Transfer to the bypass mode shall be manual in the event of VFD failure Once the motor is transferred to the bypass cir cuit the fan motor will run at constant full speed Operator controls shall be mounted on the front of the enclosure and shall consist of Start and Stop control Bypass VFD selection Auto Manual selections and manual speed control To prevent heating problems in the fan motor the VFD system shall de e
23. e to automati cally transfer fan motor to the bypass starter Automatic bypass with an earth ground condition shall not be allowed Once in bypass mode the internal controls will continue to monitor cold water temperature and cycle the fan motor on and off maintaining cold water set point temperature The drive system shall be designed and operated as a stand alone system without the need for a BMS system Operator con trols shall be mounted on the front of the enclosure and shall consist of Start and Stop control Bypass VFD selector switch Auto Manual selector switch Manual speed control and solid state temperature controller An emergency bypass starter selector switch internal to the panel allowing the fan motor to be run at full speed shall be furnished The system shall include a solid state Quadraflow Cooling Tower Specifications Options 28 Specifications Specification Value temperature controller to adjust fre quency output of the drive in response to the tower cold water temperature A fourwire RTD with dry well shall be furnished with the VFD and field installed into the cold water discharge pipe The temperature of the cold water and set point shall be displayed on the door of the control panel The bypass starter shall be integrated into the same enclosure as the VFD includ ing complete circuitry to isolate the VFD when in the bypass mode To pre vent heating problems in the fan motor t
24. eme at the left for an installation of three or more cells Dimensions Model w L A D E F G J 21120 2 8 V 4 13 9 105 98 8W 90 8 4 7 0 2 1 Ae 21920 2 8 Y 4 13 2 10 29 0 9 6 8 10 7 0 2 1 9 21320 2 8 4 13 2 10 29 7 9 11 4 8 7 2 1 Ae 22120 4 0 16 1 27 32 4 9 6 4 9 8 0 Ae 1 10 29220 4 0 6 1 2 7 9 32 10 10 04 4 9 8 0 Ae 1 10 23120 6 8 v 8 2 3 09 38 0 1143 w 4 10 9 17 17 10 Ze 23220 6 8 v 8 0 3 09 38 7 11 8 0 5 3 9 17 17 10 Ze Quadraflow Cooling Tower Engineering Data Schematic 24000 24 6 ia Dimensioni Mar H S p 6 MIN 24120 531 836 19 8 4 9 854 15 60 2 10 i 24990 796 1047 16 1 130 25 60 2 Q 10 MAKE UP NOTE 5 24 6 ACCESS COVER INLET 4 6 the 2 41 3 6 he 431 4 1 17 e L FACE OF SUMP OUTLET OTE 9 TOPOF __ OVERFLOW FAN CYLINDER AND DRAIN 4 DIA 8 6 i 4 Maximum Sump Capacities gpm Outlet Diameter USE FOR 8 10 19 14 STATIC LIFT 1550 9450 3500 4250 TOP OF For gravity flow applications outlet piping must BY OTHERS gravity pp gt t piping J i drop vertic
25. he VFD system shall de energize the motor once 2596 motor speed is reached and cooling is no longer required The VFD shall include deic ing logic and manual control with the ability to reverse fan rotation including auto canceling with adjustable time Speed in deice mode shall not exceed 5096 motor speed The manufacturer shall supply VFD start up assistance by a certified technician SP SPX COOLING TECHNOLOGIES INC 7401 WEST 129 STREET OVERLAND PARK KANSAS 66213 USA P 913 664 7400 F 913 664 7439 spxcooling spx com spxcooling com In the interest of technological progress all products are subject to design and or material change without notice ISSUED 06 2013 OF TS 13 COPYRIGHT 2013 SPX Corporation
26. ing some means for keeping the cold water basin clean Typical devices include side stream filters and a variety of filtration media WATER TREATMENT To control the buildup of dissolved solids resulting from water evaporation as well as airborne impurities and biological contaminants including Legionella an effective consistent water treatment program is required Simple blowdown may be adequate to control corrosion and scale but biological contamination can only be controlled with biocides An acceptable water treatment program must be compatible with the variety of materials incorporated in a cooling tower ideally the pH of the circulating water should fall between 6 5 and 8 0 Batch feeding of chemicals directly into the cooling tower is not a good practice since localized damage to the tower is possible Specific startup instructions and additional water quality recommendations can be found in the QuadraFlow User Manual which accompanies the tower and also is available from your local Marley sales repre sentative For complete water treatment recommendations consult a competent qualified water treatment supplier A CAUTION The cooling tower must be located at such distance and direction to avoid the possibility of contaminated discharge air being drawn into building fresh air intake ducts The purchaser should obtain the services of a Licensed Professional Engineer or Registered Architect to certify that the location of the cooling
27. models require only one inlet per cell and inlet engineering drawings or CAD files from your Marley sales piping may be located at any of the four tower corners 23000 representative for final layout models whose design GPM is 2025 or less may use a single 10 2 Nominal tons are based upon 95 F HW 85 F CW 78 F WB and inlet Above 2025 GPM two 8 inlets are required located 180 3 gpm ton apart Subtract 2 from S dimensions Locating inlet riser directly 3 Makeup connection may be 1 or 2 diameter depending upon behind motor is not recommended due to restrictions placed on tower heat load water pressure and desired connections motor access and removal 4 All table data is per cell 6 All piping loads must be supported independent of tower 7 All piping and supports are by others 8 Outlet diameters shown are for maximum GPM Smaller outlet diameters may be appropriate Quadraflow Cooling Tower Engineering Data Schematic 21000 22000 23000 re G E INLET PLAN TWO CELL PLAN MULTICELL Two cell installations may conform to either of the two schemes The multicell scheme shown here applies to any number of cells shown here Choose the pattern that best fits into your available Contact your Marley sales representative for additional details if you space prefer to use the sch
28. nd Voltage Model Temp F 1 208 1 240 1 480 3 208 3 240 3 480 21000 3 3 22000 45 45 30 23000 6 6 24000 15 21000 6 6 22000 6 6 20 23000 9 9 24000 21 21000 75 75 22000 9 9 10 23000 12 12 24000 2 15 21000 9 9 22000 12 12 o 23000 15 24000 2818 21000 12 12 22000 15 10 23000 2 9 2 9 24000 2 21 2 2 21 21000 15 22000 18 18 20 23000 2 12 2 12 24000 4 15 2 21000 15 22000 18 30 23000 2 12 2 12 24000 4818 2 Except where 2 is indicated one set of controls will handle the required number of heaters Where 2 is indicated however two sets of controls are required per cell c me Quadraflow Cooling Tower Specifications Base 16 Specifications Specification Value Base Furnish and install an induced draft crossflow type field erected fiberglass and stainless steel cooling tower of cell s as shown on plans Cells shall be similar and equal in all respects to Marley QuadraFlow Model Thermal Performance The tower shall be capable of cooling GPM of water from F to F at a design entering air wet bulb temperature of F The thermal per formance rating shall be Certified by the Cooling Technology Institute Performance Warranty CTI Certification notwithstanding the cooling tower manufacturer shall guar antee that the cooling tower supplied will meet the specified performan
29. nergize the motor once 25 motor speed is reached and cooling is no longer required The manufacturer shall supply VFD start up assistance by a certified technician Quadraflow Cooling Tower Specifications Options Specifications Specification Value Marley Premium VFD System Add the following paragraph in the Mechanical Equipment section when VFD is used as a stand alone system For fan control a complete UL listed variable speed drive system in a NEMA 12 indoor or NEMA 3R out door enclosure shall be provided The VFD shall use PWM technology with IGBT switching VFD output switch ing signal shall be programmed as not to cause mechanical vibration issues with back lash in gearbox teeth or vibration issues associated with long drive shafts VFD shall be programmed for variable torque application The VFD shall catch a fan spinning in the forward or reverse direction without tripping VFD panel construction shall include a main disconnect with short circuit and thermal overload protec tion with external operating handle ockable in the off position for lock out tag out safety procedures A service switch directly ahead of the VFD shall be provided for voltage isolation dur ing VFD maintenance An integrated full voltage non reversing bypass starter shall be furnished allowing fan motor operation if VFD has failed In the event of a system fault the VFD program logic shall evaluate type of fault determining if saf
30. ng Tower Specifications Base 18 Specifications Fill Louvers and Drift Eliminators Fill shall be film type thermoformed PVC with louvers and eliminators formed as part of each fill sheet Fill shall be sus pended from stainless steel structural tubing supported from the tower structure and intermediate stainless steel panels and shall be elevated at least 2 51mm above the floor of the cold water basin to facilitate cleaning Air inlet faces of the tower shall be free of water splash out Drift eliminators shall be PVC triple pass and shall limit drift losses to 0 00596 or less of the design water flow rate Louvers Fill sheets Specification Value E Louvers integral with the fill keep the flowing water within the confines of the fill The separate external louvers used by others permit water to escape the fill and form ice or produce an unsightly situation adjacent to the tower If you plan to use your tower in the wintertime particularly for free cooling integral louvers will put your operating concerns to rest E Drift rate varies with design water loading and air rate as well as drift eliminator depth and number of directional changes A drift rate of 0 001 is readily available on many standard models If a lower rate is required please discuss with your Marley sales rep resentative Drift Eliminators Quadraflow Cooling Tower Specifications Base 19 Specifications Specification V
31. ontroller is used the controller will be door mounted on the control panel The temperature controller will display two temperatures one for outgoing water and the other for set point Water tem perature input shall be obtained using a three wire RTD with dry well in the outlet water piping and wired back to the solid state temperature controller in the control panel W If it is your opinion that the control system for the cooling tower should be part of the tower manufacturer s responsibility we are in wholehearted agreement with you Who better to determine the most efficient mode and manner of tower s operation and to apply a system most compatible with it than the designer and manufacturer of the cooling tower Marley variable speed drives are also available for the ultimate in temperature control energy management and mechanical equipment longevity Quadraflow Cooling Tower Specifications Options 93 Specifications Vibration Limit Switch Add the following paragraph in the Mechanical Equipment section A single pole double throw vibration limit switch in a NEMA 4 housing shall be installed on the mechanical equipment support for wiring into the owner s control panel The purpose of this switch will be to interrupt power to the motor in the event of exces sive vibration It shall be adjustable for sensitivity and shall require manual reset Basin Heater Add the following paragraph in the Cold Wate
32. or Standard fan drives of other manufacturers may use V belts Considering the size of fans involved and the hp applied this is not good design practice Gear drive is far more reliable and trouble free and is not proprietary It is cur rently offered as an additional cost option by principal Marley competitors To reduce cost some manufacturers may use TEAO motors whose only source of cooling is the flow of air produced by the cooling tower fan They are some times applied at hp significantly beyond their nameplate rating Also if they drive the fan through V belts they are probably mounted in a shaft vertical position This is not good practice in the moisture laden airstream of a cooling tower because of the tendency of moisture to invade bearings by flowing down the motor shaft Unless otherwise specified motor speed will be 1800 RPM in 60 Hertz areas and 1500 RPM in 50 Hertz areas If you prefer the operating flexibility of two speed operation please specify the RPM to be 1800 900 1500 750 in 50 Hertz regions Incidentally two speed motors are a far better choice than sepa rate pony motors which simply double the problems indicated above The value of a 5 year mechanical equipment warranty speaks for itself Except for the motor all of the mechanical equipment on a Marley tower is made by SPX Cooling Technologies Cooling tower vendors who purchase commercial fans gear reducers driveshafts etc may require th
33. ort H 002 The Application of Cooling Towers for Free Cooling these controls can help you maximize the amount of time during the year that your expensive to operate chiller does not have to be operated All motor controls are factory tested before shipping Temperature controllers are provided to adjust fan operation to cooling require ments Applications APPLICATIONS REQUIRING ALTERNATIVE COOLING TOWER SELECTIONS Certain types of applications are incompatible with any cooling tower with PVC film fill whether a QuadraFlow or a competitive tower of similar manufacture PVC is subject to distortion in high water temperatures and the narrow passages typical of film type fill are eas ily clogged by turbid or debris laden water Some of the applications which call for alternative tower designs are Water temperatures exceeding 125 F adversely affect the ser vice life and performance of normal PVC fill Ethylene glycol content can plug fill passages as slime and algae accumulate to feed on the available organic materials Fatty acid content found in processes such as soap and deter gent manufacturing and some food processing fatty acids pose a serious threat for plugging fill passages Particulate carry over often found in steel mills and cement plants can both cause fill plugging and can build up to poten tially damaging levels on tower structure Pulp carry over typical of the paper industry and food process
34. r Basin section Provide a system of electric immersion heaters and con trols for each cell of the tower to prevent freezing of water in the collection basin during periods of winter shutdown The system shall consist of a three element stainless steel electric immersion heater welded to a 3 16 thick stainless steel mounting plate complete with a NEMA 4 terminal box A NEMA 4 enclosure shall house a magnetic contactor to energize heaters a transformer to provide 24 volt control circuit power and a solid state cir cuit board for temperature and low water cutoff A control probe shall be located in the basin to monitor water level and tem perature The system shall be capable of maintaining 40 F water temperature at an ambient air temperature of F Fan Motor Variable Speed Drive ACH550 VFD System Add the following paragraph in the Mechanical Equipment section when VFD is used with customers Building Management System For fan control a complete UL listed vari able speed drive system in a NEMA 1 indoor NEMA 12 indoor or NEMA 3R outdoor enclosure shall be provided The VFD shall use PWM technology with IGBT switching VFD output switching signal shall be programmed to not cause mechanical vibration issues with backlash in gearbox teeth or vibration issues associated with long driveshafts The VFD shall be pro grammed for variable torque applica Specification Value E Unless specified otherwise a Marley M
35. rials of manufacture E This combination of fiberglass and stainless steel provides complete protection against the degrading effects of corrosion The molded shapes of the fiberglass also provide an architecturally pleasing appearance that is rare in a cooling tower The listed design values give you assurance that the tower can be shipped handled constructed and ultimately operated in a long term hostile environ ment Section 1632 of the 1997 UBC Lateral Force on Equipment Supported by Structures states that the anchorage for permanent equipment must resist the lateral seismic force The structure for the equipment is not required to resist the seismic force unless failure represents a life hazard Life hazard is depen dent on location and the process supported If you feel the need to have a com pliant structure please consult SPX engineering Except for those unusual operating situations where the circulating water may be so laden with suspended solids algae fatty acids product fibers active organisms reflected in BOD and the like that plugging of the fill is a probability reasonable attention to the construction materials and or their coatings is all that is normally required If extended longevity of the tower is required or unusually harsh operating conditions are expected consider specifying 316 stainless steel components Discuss the need for this with your local Marley sales representative Quadraflow Cooli
36. rovides Quadraflow model recommendations based on customer s specific design requirements 27 5 PLAN MU LTICELL The multicell scheme shown here applies to any number of cells Contact your Marley sales representative for additional details if you prefer to use the scheme at the left for more cells an installation of three or Dimensions Model D Ww 24120 4 3 53 3 24220 5 8 54 8 Quadraflow Cooling Tower Engineering Data Support M 4 21000 22000 23000 ANCHOR ANCHOR BOLT BOLT zs 2 2 g Dimensions Maximum Maximum Wind Seismic Loads Ib lt n Model Operating Operating Load I te M P Wt Cell at Anchor Max Vertical Max Horizontal i T Ib Ib Reaction at Anchor Reaction at Anchor 21120 TIW 7 1 A 10715 2934 664 2790 671 2679 21220 TEST AY 11016 3009 959 3543 807 2754 1 PM 21320 7 7 Yo 7 1 Ye 11358 3121 1331 4213 950 2840 22120 9 0 8 6 4 14400 3881 921 3499 906 3600 1 22220 9 0 8 6 4 15159 4264 1279 4496 1067 3790 23120 9 4 8 10 22465 6040 1625 6045 1075 5616 CEDE MEC y S 23220 9 4 8 10 23120 6245 1860 7347 1230 5780 Q z lt SEE SUPPORT DETAIL TYPICAL FOUR PLACES 4 MIN 1 MIN 2 1 MIN 4 MIN r 1
37. ructions if tower is to be supported directly on vibration isolators Wind loads are based on 30 psf and are additive to operating loads Reactions due to seismic loads are calculated on the basis of a 1g lateral load and are additive to operating loads Quadraflow Cooling Tower Engineering Data 21000 22000 23000 Support R R i E moot 7 Ley dgge ANCHOR ANCHOR n gt BOLT BOT x B 5 s 55 zo lt k lt 3 E She te i el 2 P M o QW A e a4 Jul J R o le 29 a 9 S E lt x H SEE SUPPORT DETAIL x RS TYPICAL FOUR PLACES a gt UMN T N Ex Ut x VA 2E z 5 DS 9o 4 T zo 2 J on 8 M z g e CM 2 Se SUPPORT PLAN TWO CELL SUPPORT PLAN MULTICELL Dimensions Model M P R V T U 21120 T 7 7 1 2 5 1 78 10 0 78 8 498 4 7 Je 21220 7 7 7 1 5 1 78 10 0 7 8 10 5e 4 7 38 21320 7p 7p 5 1 7g 10 0 78 9 3 4 7 38 22190 9 0 1 6 8 6 4 6 1 58 12 0 9 3 4 7 he 22290 9 0 8 6 4 6 1 58 12 0 9 9 4 7 he 23120 9 4 58 8 10 6 4 13 16 12 6 19 1 0 6 2 he 23220 9 4 58 8 10 6 4 13 16 12 6 12 6 6 2 he
38. s the right hand column comments on the meaning of the subject matter and explains its value Z JANSSEN TNC NY 5 7 0 3 20 1 17 gt D L Pages 15 thru 20 indicate those paragraphs which will result in the purchase of a tower that will not only accomplish the specified thermal performance but will include normal operation and maintenance enhancing features Also on these pages are paragraphs intended to add those features and components that will customize the tower to meet the user s requirements Space does not permit definition and explanation of all the possible options that can be applied to the OuadraFlow We realize that you the purchaser must be happy with the tower and its characteristics and we are prepared to provide or provide for any reasonable enhancement that you are willing to define and purchase Your needs will become part of the continuing evolution of this Marley product line Quadraflow Cooling Tower Engineering Data Schematic 5 w INCET TA 21000 22000 23000 6 MIN ee X T1 i Dimensi imensions LEAD gau Model Qoid Motor Inlet Outlet aa er a w H s A B c hp note5 note 8 21120 129 18
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