Forced Draft, Axial Fan Models Available in Capacities ... The pump section connection strainer is one component subject to excessive wear and corrosion. EVAPCO provides a Type 304L

Bulletin 314

Forced Draft, Axial Fan Models Available in Capacities from 105 to 1,304 Tons!

2

Since its founding in 1976, EVAPCO, Incorporated hasbecome an industry leader in the engineering and

manufacturing of quality heat transfer products around theworld. EVAPCO’s mission is to provide first class serviceand quality products for the following markets:

� Industrial Refrigeration� Commercial HVAC� Industrial Process� Power

EVAPCO’s powerful combination of financial strength andtechnical expertise has established the company as arecognized manufacturer of market-leading products on aworldwide basis. EVAPCO is also recognized for the superiortechnology of their environmentally friendly productinnovations in sound reduction and water management.

EVAPCO is an employee owned company with a strongemphasis on research & development and modernmanufacturing plants. EVAPCO has earned a reputation fortechnological innovation and superior product quality byfeaturing products that are designed to offer theseoperating advantages:

� Higher System Efficiency� Environmentally Friendly� Lower Annual Operating Costs� Reliable, Simple Operation and Maintenance

With an ongoing commitment to Research & Developmentprograms, EVAPCO provides the most advanced products inthe industry – Technology for the Future, Available Today!

EVAPCO products are manufactured in 17 locations in 8countries around the world and supplied through a salesnetwork consisting of over 170 offices. EVAPAK® Fill

©2010 EVAPCO, Inc.

Super Low Sound FanTechnology• One Piece Molded Heavy Duty

FRP Construction.• Sound level reduction 10-13 dBA

on fan side vs. older PMT towers.

EVAPCO is Proud to Introduce SuperLow Sound Technology for Forced DraftAxial Fan Open Cooling Towers.

PMTQ/LSTB Sound ComparisonsSound Pressure Levels

Fan Opp.Motor Fan Opp. Fan

Model No. Power End Side End Side Top

LSTB 10112 30 57 66 57 56 63PMTQ 10512 15 57 66 57 57 62LSTB 10318 50 59 66 59 56 63PMTQ 10818 30 59 69 59 58 63

U.S.

Pat

ent N

o. 5

1240

87

NOTE: Sound pressure levels in dB(A) 50' from source.

• Reduced energy consumption compared to Forced DraftCentrifugal Open Cooling Towers.

• Typical sound values equal or lower than Forced DraftCentrifugal Open Cooling Towers of similar size.

EvapJet ™ Water Distribution System• Large orifice prevents clogging (no moving parts).• Fluidic Spray Technology provides complete fill

pack coverage.• Precision molded ABS for superior

corrosion resistance.

3

Design and Construction Features

NEWNEW

EVAPCO is proud to introduce the latest in evaporative cooling technology, the PMTQ SuperLow Sound Cooling Tower. Easy to install...Easy to maintain...Easy on the operatingbudget...The Easy Choice!

Double-BrakeFlange Joints • Stronger than single-brake designs

by others.• Minimizes water leaks at field joints.• Greater structural integrity.

Unique Field Seam• Eliminates up to 85% of fasteners.• Self guiding channels improve quality

of field seam to eliminate leaks.• Easy to install.• Lower installation cost.

Water Saver Drift Eliminators• New patented design reduces drift rate to 0.001%.• Saves water and reduces water treatment cost.• Greater structural integrity vs.old style blade-type.• Recessed into casing for greater protection.

U.S. Patent No. 6,315,804

Man-Sized AccessDoor–Standard• Oversized door for ease of

access and maintenance.

Individual Fan Drive System - STANDARD• Increased flexibility for improved capacity control.• Greater reliability through redundancy.• Easy motor replacement.• Front mounted drives for improved maintenance accessibility.• Standard with premium efficient inverter capable motors.

Easy Clean Sloped Pan Bottom• Pan bottom slopes to drain.• Stays cleaner between regular maintenance intervals.• Easy to clean.• Stainless steel pump suction connection strainer.

NEWNEW

4

DESIGN FEATURES

Proven Performance & Design FlexibilityThe new PMTQ Cooling Tower offers more capacity andgreater system design flexibility than ever before. EVAPCO'sresearch and development team has invested hundreds ofhours in laboratory testing to develop the next generation inForced Draft Cooling Tower Technology. These efforts haveproduced a totally new fan section design which is nowcombined with the proven EvapPak Fill technology to offerimproved cooling tower performance.

The PMTQ features more plan area options and fanhorsepower options for the system design engineer. Withmore tower capacity, more plan area options and greaterflexibility in motor selection, the design engineer can nowmatch the tower performance to the specific applicationrequirements. More equipment choices and more designflexibility mean greater value for the End-User.

Individual Fan Drive SystemCapacity Control Flexibility & Operating Redundancy

The new PMTQ fan drive system provides individual motor tofan configuration as standard equipment on all models. Thededicated fan to motor arrangement ensures less “wear &tear” on the drive system versus tandem fan motor drivearrangements resulting in less maintenance. The individualmotor to fan design offers greater capacity control flexibilityto match the system load requirements.

Easy Field Assembly85% Fewer FastenersLower Installed Cost

The PMTQ features a newfield seam design whichensures easier assembly andfewer field seam leaks. Thefield seam incorporates newself-guiding channels toguide the fill casing sectioninto position and set in place on the bottom fan section of thetower. In addition, the new design eliminates up to 85% of thefasteners typically used to join the tower sections in the fieldsignificantly reducing the contractor labor costs for installation.

5

DESIGN FEATURES

Improved MaintenanceFan Drive Accessibility

The drive components of the PMTQ are easily accessed forroutine maintenance from the front of the unit. Bearing greasefittings are extended to the outside of the unit for ease oflubrication. All drive sheaves are located to the front of thefan section and motors are positioned on a platform base toallow for easy belt tension adjustment.

Easy Clean Sloped Basin

The PMTQ drain pan isdesigned to improvemaintenance access andmake it easier foroperating technicians toclean. The bottom of thepan is sloped to the unitdrain to ensure that thebasin will completely drainand allow sediment anddebris that may collect inthe basin to be easilyflushed from the unit. Thedesign helps to preventbuildup of sedimentarydeposits, biological filmsand standing water.

Man-Sized Access Door

Evapco offers standard“man-sized” access doorsto improve access to thiscritical area of the unit.

Construction FeaturesUnique Seam Design–Eliminate Field Leaks

The new PMTQ features Evapco's unique panel constructiondesign which includes a special butyl tape sealer with anintegral sealing gasket. Each joint is then backed with asecondary caulking compound and encased in a double-brakeflange for addedstrength andstructuralintegrity. Thisunique sealingsystem has beenproven effectivein bothlaboratory testsand years of fieldapplication.

Superior Water Saver Drift Eliminators

The PMTQ Cooling Tower incorporates a patented* highlyefficient PVC drift eliminator. The eliminator removesentrained water droplets from the air stream to limit the driftrate to less than 0.001% of the recirculating water rate. Witha low drift rate, PMTQ cooling towers save valuable water andwater treatment chemicals. The eliminators feature ahoneycomb design which offers greater structural integrityand are recessed in the top of the casing and UV protectedfor longer life. They are constructed of inert polyvinylchloride (PVC) which eliminates corrosion in this critical areaof the tower. The eliminators are assembled in sections foreasy handling and removal for fill pack and water distributionsystem inspection.

*U.S. Patent No. 6,3158,0481

OverlaySealant

Anti-LeakSealer Strip

IntegralCompressionShim

DESIGN FEATURES

6

Principle of OperationWarm water from the heat source is pumped to the waterdistribution system at the top of the tower. The water isdistributed over the wet deck fill by means of large orifice nozzles.Simultaneously, air is blown through the fan section at the base ofthe tower and travels upward through the wet deck fill oppositethe water flow. A small portion of the water is evaporated whichremoves the heat from the remaining water. The warm moist airis forced to the top of the cooling tower by the fan and dischargedto the atmosphere. The cooled water drains to the basin at thebottom of the tower and is returned to the heat source.

Pressurized Water Distribution SystemThe water distribution system is made of schedule 40 PVC pipeand EvapJet™ ABS plastic water diffusers for corrosion protectionin this key area. The piping is easily removable for cleaning. Thewater diffusers have a 1 inch diameter (25mm) opening and arepractically impossible to clog. They also have an anti-sludge ringextending into the headers to prevent sediment from building upin the diffuser opening. In addition, the spray branches havethreaded end caps to allow easy debris removal.

The spray pressure for all AT Cooling Towers is between 1 and 6psig (7 and 42 kPa) at the inlet header. The actual spray pressurewill be shown on the certified drawings which are prepared foreach unit.

Stainless Steel StrainersThe pump section connection strainer is one componentsubject to excessive wear and corrosion. EVAPCO providesa Type 304L stainless steel strainer on all units with pumpsuction connections as standard. Strainers are positionedaround a large anti-vortex hood in easily handled sections.

STRAINER

Hot Water In

Cooled Water Out

Hot SaturatedDischarge Air

Cooledledater Out

Cool DryEntering Air

PRINCIPLE OF OPERATION

DESIGN FEATURES

7

EVAPCOAT: Corrosion Protection SystemG-235 Hot-Dip Galvanized Steel Construction

The standard material of construction for evaporative coolingequipment for many years has been hot-dip galvanized steel.The purpose of galvanizing is to protect the base metal fromcorrosion, and the thickness of the galvanized layer directlyaffects the equipment life.

EVAPCO has been instrumental in the development ofcorrosion protection technology and was the firstmanufacturer to use G-235 galvanized steel construction.The G-235 designation equates to a minimum of 2.35 ouncesof zinc per square foot of surface area.

The EVAPCOAT Corrosion Protection System is the heaviestgalvanized coating available for extended corrosionprotection eliminating the need for costly, unreliable epoxypaint finishes.

Stainless Steel Material OptionsThe EVAPCOAT Corrosion Protection System is satisfactory formost applications. If additional corrosion protection is requiredthe following stainless steel options are available. Pleasecontact your local EVAPCO representative for pricing.

� Stainless Steel Cold Water Basins–� Stainless Steel Water Touch Basin� Stainless Steel Water Touch Units� All Stainless Steel Units

EVAPAK® Cooling Tower FillThe EVAPAK® fill design used in the forced draft cooling towerline is the culmination of thousands of hours of research andtesting conducted by EVAPCO’s research engineers. Thisprogram has produced a cooling tower fill with superior heattransfer, reduced channeling in flow passages, improved dripenhancement for lower air side pressure drop and exceptionalstructural strength.

The fill is specially designed to induce highly turbulent mixingof the air and water for heat transfer. This is made possible byforming the raw fill into corrugated panels on which there aresmall ridges. These ridges serve many purposes, one of whichis to create agitation in both the water and the air in the tower.The increase in turbulence prevents channeling of the waterand promotes better mixing of air and water, and improvedheat transfer. In addition, special drainage tips allow highwater loadings without excessive pressure drop.

The fill is constructed of inert polyvinyl chloride (PVC) and isformulated to withstand water temperatures of 130°F. The fillalso has excellent fire resistant qualities providing a flamespread rating of 5 per ASTM-E84-81a. (The flame spreadrating scale ranges from 0 for non-combustible to 100 forhighly combustible). Because of the unique way in which thecrossfluted sheets are bonded together, the structural integrityof the fill is greatly enhanced, making the fill suitable as aworking platform.

A high temperature fill is available for water temperaturesexceeding 130°F. Consult your EVAPCO representative forfurther details.

EVAPAK® FILL

IBC COMPLIANCE

8

What is IBC?International Building CodeThe International Building Code (IBC) is a comprehensive set ofregulations addressing both the structural design and theinstallation requirements for building systems – includingHVAC and industrial refrigeration equipment. The IBC isintended to replace BOCA’s The National Building Code, ICBO’sUniform Building Code and SBCCI’s Standard Building Code.

Compared to previous building codes that considered only thebuilding structure and component anchorage, the requirementscontained within the IBC address anchorage, structural integrity,and the operational capability of a component following either aseismic or wind load event. Simply stated, the IBC codeprovisions require that evaporative cooling equipment, and allother components permanently installed on a structure, mustbe designed to meet the same seismic or wind load forces asthe building to which they are attached.

How Does IBC 2006 Apply to Cooling Towers?Based on the project zip code and site design factors,calculations are made to determine the equivalent seismic “gforce” and wind load (in pounds per square foot – psf) on theunit. The cooling tower must be designed to withstand thegreater of either the seismic or wind load.

All locations with design criteria resulting in a seismic designforce of up to 1.0g or a wind load of 60 psf or below will beprovided with the standard PMTQ structural design. Anupgraded structural design is available for installations withdesign criteria resulting in “g forces” greater than 1.0g. Thehighest “g force” location in North America is 5.12g. Thehighest wind load shown on the maps is 170 mph, which isapproximately equal to 145 psf velocity pressure. Therefore,the upgraded structural design package option for the NewPMTQ is designed for 5.12 g and 145 psf making itapplicable to ALL building locations in North America.

Seismic DesignThe chart shown below, from the US Geological SurveyWebsite http://www.usgs.gov/ shows the potential seismicactivity in the United States. Buildings constructed in the red,orange and yellow areas of the map are most likely to requirethe upgraded PMTQ construction design based on the siteseismic design factors. Critical use facilities, such ashospitals, are also more likely to require the upgraded design.

The project architect or civil engineer is responsible fordetermining the seismic design factors to be used for thebuilding design. A mechanical consulting engineer and/ordesign build contractor will then apply these factors to a seriesof charts and graphs to determine the appropriate seismicdesign factors based on the location of the installation andultimately the “importance” of the facility. The specific factorsnecessary for seismic design as well as a sample seismiccalculation are shown on page 9.

32+

Highest Hazard

Lowest Hazard

%g

24-3216-248-164-82-40-2

Map courtesy US Geological Survey website

In its continuing commitment to be the leaders in evaporative cooling equipment design and services, EVAPCO PMTQCooling Towers are now Independently Certified to withstand Seismic and Wind Loads in ALL Geographic

Locations and Installations in accordance with IBC 2006.

The New PMTQ is offered with a choice of TWO structuraldesign packages:• Standard Structural Design – For projects with ≤1.0g

seismic or 60 psf wind loads• Upgraded Structural Design – Required for projects with

>1.0 g seismic or 145 psf wind loads

IBC COMPLIANCE

9

Wind DesignThe IBC 2006 code book includes a map of basic wind speed(3-second gust) by contour lines. However, local regulationsmay be more stringent than these published speeds. Thespecific factors necessary for wind load as well as a samplewind load calculation are shown on Page 11.Whichever design force - seismic or wind - is more severe forthe building, governs the design of the building and all attachedequipment.

Design ImplementationEVAPCO applies the seismic design and wind load informationprovided for the project to determine the equipment designnecessary to meet IBC requirements. This process ensures thatthe mechanical equipment and its components are compliantper the provisions of the IBC as given in the plans andspecifications for the project.

Independent CertificationAlthough the IBC references and is based on the structuralbuilding code ASCE 7, many chapters and paragraphs of ASCE7 are superceded by the IBC, independent certification andmethods of analysis are such paragraphs. Per the most recentedition of the code, the EVAPCO compliance process includedan exhaustive analysis by an independent approval agency. Asrequired by the International Building Code, EVAPCO supplies acertificate of compliance as part of its submittal documents.The certificate of compliance demonstrates that the equipmenthas been independently tested and analyzed in accordance withthe IBC seismic and wind load requirements. Evapco hasworked closely with an independent approval agency tocomplete the equipment testing and analysis.

If the seismic “g force” or wind load psf requirements for theproject site are known, EVAPCO’s online equipment selectionsoftware, evapSelect™, will allow you to choose the requiredstructural design package – either standard construction orupgraded construction.If the project requirements are unknown, the followingcalculations must be completed.

For further questions regarding IBC compliance, please contactyour local EVAPCO Representative or visit www.evapco.com.

Seismic Load CalculationsThe data required to calculate the seismic load are:

Occupancy Category – I, II, III or IV depending on the nature ofthe building occupancy. Table 1604.5 in the IBC 2006 CodeBook defines each of the four categories in detail. In summarythe four categories are:

• Category I - structures that represent a low hazard to human life in the event of a failure.

• Category III - structures that represent a substantial hazard to human life in the event of a failure.

• Category IV - structures designated as essential facilities.

• Category II - any structures not listed in I, III or IV.

Site Classification – A, B, C, D, E or F based on the types ofsoil and their engineering properties. Table 1613.5.2 in the IBC2006 Code Book defines each of the categories in detail. IBCspecifies site class “D” when soil properties are unknown.

Certificate of ComplianceLSTE, LPT, PMTQ Cooling Towers

PMWQ, LSWE, LRWB Closed Circuit CoolersPMC-E, LSC-E and LRC Evaporative Condensers

Are certified to meet or exceed the Seismic and Wind Load Provisions set forth in the applicable building codes for this project.

These products have been manufactured following all applicable quality assurance programs.

Applicable Building Codes:IBC 2006ASCE-7NFPA 5000

Referenced Report:VMA-43387

Approval Agency:VMC Seismic Consulting Group

EVAPCO...Specialists in Heat Transfer Products and Services. FD IBC COC 001

When using the EVAPCO selection software to make aselection, these calculations are already incorporated intothe selection process. Simply enter the required factors andthe Seismic Design Force and Wind Load will be calculatedautomatically!!Wind Load Map Courtesy IBC 2006 Text –

See full-sized map for location specific values

IBC COMPLIANCE

10

Maximum Spectral Response Acceleration (Ss) – Numericalvalue found using the U.S. Geological (USGS) data based onthe Zip Code of the project. This data point can be determinedusing the Ground Motion Parameter Calculator athttp://www.usgs.gov/. Note the calculator assumes a siteclassification of B for the 0.2 second maximum Ss. The sitecoefficient (Fa), defined below, will correct for the actual siteclassification.

Site Coefficient (Fa) – Values ranging from 0.8 to 2.5 determinedbased on the Ss and the Site Classification. Table 1613.5.3(1) inthe IBC 2006 Code Book defines these values.

Design Spectral Response Acceleration (SDS) – A calculatedvalue using the values for Ss and Fa.

Amplification Factor (ap) – 2.5 for flexible components orflexibly attached components. Due to its low inherent naturalfrequencies, most evaporative cooling equipment falls underthe definition of flexible. Therefore the default for CoolingTowers is 2.5. See Table 13.6-1 in the American Society ofCivil Engineers (ASCE) Standard 7-05, to which IBC oftenreferences, for more information.

Response Modification Factor (Rp) – 2.5 for non-isolatedevaporative cooling equipment. 2.0 for vibration isolatedevaporative cooling equipment. Table 13-6.1 of ASCE 7-05provides additional information.

Component Operating Weight (Wp) – This weight term hasbeen removed from the equation below, because EVAPCO isexpressing the force in terms of g’s and not lbs.

Importance Factor (Ip) – 1.5 for Occupancy Category IV, lifesafety components required to function after a seismic event orcomponent containing hazardous content. 1.0 for all othercomponents. ASCE 7-05 Section 13.1.3 provides additionaldetail on importance factors.

Installation Location (Z/h) – 0 for units installed at groundlevel. 1.0 for units installed on a rooftop. Per ASCE 7-05Section 13.3, z = the height of the point of attachment of thecomponent and h = the relative roof height.

Seismic Design Force, (Fp) – “G-force” that the unit must beable to withstand. This number is calculated using the factorsdescribed above. The New PMTQ is offered with a choice oftwo structural design packages, consisting of:

– Standard Structural Design ≤ 1.0g – Upgraded Structural Design – up to 5.12g (the

maximum value for North America)

Seismic Load Sample Calculation

The following example demonstrates the procedure fordetermining which structural design package a CommunityHospital located in Charleston, SC (zip code 29401) wouldrequire under the latest version of IBC. In this example, thecooling tower will be installed on a roof, approximately 60 feetabove grade. The unit will also be installed with a vibrationisolation system.

Step 1: Calculate the Design Spectral Response Acceleration(SDS)

Where:SS = 1.495; using the USGS Ground Motion Parameter

CalculatorFa = 1.0; from Table 1613.5.3(1) in the IBC 2006 Code Book

assuming a Site Classification of D

Step 2: Calculate the Seismic Design Force (Fp )

Where:ap = 2.5; the default for cooling towers SDS = 0.9966; as calculated in Step 1Wp = 1.0; the default for cooling towers Rp = 2.0; the default for isolated equipmentIp = 1.5; the default for life safety componentsz/h = 1.0; the default for units on a rooftop

In order to meet Code requirements, the unit and its anchoragemust be constructed to withstand 2.24 g. This will require thatthe upgraded structure option be chosen to meet the seismicrequirements of this project. Because the seismic load requiresthe upgraded structural design, the wind load calculationresults will not change the design and are not required for thisanalysis.

SDS (Fa)(Ss)= 23 (1.0)(1.495)=0.9966= 2

3

FP 1+2 zh

= =0.4 (aP)(SDS)(WP) (1+2(1))=2.24g

RP

IP( )0.4 (2.5)(0.9966)(1)

2.01.5( )

( )

SDS (Fa)(Ss)= 23

IBC COMPLIANCE

11

Wind Load CalculationsThe data required to calculate the wind load are:

Basic Wind Speed (V) – Numerical value, in miles per hour(mph) found in ASCE 7-05 Figures 6-1 (A,B,C).

Wind Directionality Factor (Kd) – 0.85 for building componentsand cladding. Table 6-4 of ASCE 7-05 provides additionalinformation.

Occupancy Category – I, II, III or IV depending on the nature ofthe building occupancy. Table 1604.5 in the IBC 2006 CodeBook defines each of the categories in detail. This is the sameOccupancy Category used in Seismic calculations.

Importance Factor (I) – Numerical value between 0.77 and1.15 based on the Basic Wind Speed and the OccupancyCategory. These values are found in Table 6-1 of ASCE 7-05.

Exposure Category – B, C or D as defined in Section 6.5.6.3 ofASCE 7-05.

Component Elevation (z) – The anchorage height of the unit infeet.

Nominal Height of the Atmospheric Boundary Layer (zg) -Numerical value based on Exposure Category. These valuesare found in Table 6-2 of ASCE 7-05.

3 second Gust-Speed power Law Exponent (α) - Numericalvalue based on Exposure Category. These values are found inTable 6-2 of ASCE 7-05.

Velocity Pressure Exposure Coefficient (Kz) – A calculatedvalue using the values for zg and α.

Topographic Factor (Kzt) – 1.0 default when topographic effectsare not a factor. ASCE 7-05 Section 6.5.7 provides additionaldetail on topographic factors.

Velocity Pressure (qz) – This number in pounds per squarefoot (psf) is calculated using the factors described above. TheNew PMTQ is offered with a choice of two structural designpackages, consisting of:

– Standard Structural Design - up to 60 psf – Upgraded Structural Design - up to 145 psf (the

maximum value for North America)

Wind Load Sample Calculation

The following example demonstrates the procedure todetermine which structural design package a CondominiumBuilding located in Miami, FL (zip code 33101) would requireunder the latest version of IBC. In this example, the coolingtower will be installed on the top of the 60 foot tall building.

Step 1: Calculate the Exposure Category Coefficient (Kz)

Where:z = 60; Installation Heightzg = 700; from ASCE 7-05 Table 2 using an Exposure

Category of D.α = 11.5; from ASCE 7-05 Table 2 using an Exposure

Category of D.

Step 2: Calculate the Velocity Pressure (qz)

Where:

Kz = 1.31; as calculated above.Kzt = 1.0; default when topographic effects are not a factor.Kd = 0.85; default for building components and cladding.V = 145; wind speed from ASCE 7-05 Figure 6-1.I = 1.0; Based on an Occupancy Category of II.

In order to meet Code requirements, the unit and itsattachments must be designed and constructed to withstand59.93 psf. This means that the standard PMTQ constructiondesign will meet the wind load requirements of this project.Because the wind load does not require the upgraded structuraldesign, the seismic load calculation must also be completed todetermine if the results will change the unit design.

( )KZ = 2.01 a

2zzg( )

( )( )KZ = 2.01 a

2 2

11.5zzg( ) = 2.01 = 1.31

60700( )

qz = 0.00256(Kz)(Kzt)(Kd)(V2)(I) =

0.00256(1.31)(1.0)(0.85)(1452)(1.0) = 59.93psf

12

MODELS PMTQ 10112 TO 10918 Thermal performance certified by the Cooling TechnologyInstitute (CTI) in accordance with CTI Standard STD-201

† Mark Owned by the Cooling Technology Institute.

To Make a Selection:Locate the column with the desired operating temperature conditions. Read down the column until you find the GPM equal to or greater than the flowrequired. Read horizontally to the left to find the model number of the unit that will perform the duty.

Note: For alternate selections and conditions other than those stated, consult your evapSelect™ selection program or local EVAPCO representative.

†

COOLING CAPACITY IN GPMTEMP °FEWT 90° 95° 90° 95° 90° 95° 90° 95° 95° 100°

MOTOR LWT 80° 80° 80° 80° 80° 80° 80° 80° 85° 85°MODEL NO. HP WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75°PMTQ 10112 (2) 5 805 598 732 539 633 465 530 387 743 556PMTQ 10212 (2) 5 919 706 845 645 742 571 637 497 856 662PMTQ 10312 (2) 7.5 947 719 868 654 757 572 644 489 879 671PMTQ 10412 (2) 5 973 776 905 719 809 649 711 581 915 734PMTQ 10512 (2) 7.5 1062 831 982 764 871 679 754 596 994 782PMTQ 10612 (2) 7.5 1110 893 1034 828 929 750 819 673 1045 845PMTQ 10712 (2) 10 1213 977 1131 910 1017 826 901 742 1142 928PMTQ 10812 (2) 15 1318 1052 1226 973 1097 876 962 779 1240 994PMTQ 10912 (2) 15 1362 1100 1270 1025 1143 934 1015 842 1283 1044PMTQ 10118 (3) 5 1212 901 1102 811 952 700 798 582 1118 837PMTQ 10218 (3) 5 1384 1064 1273 972 1118 860 958 749 1289 996PMTQ 10318 (3) 7.5 1427 1082 1307 984 1141 862 969 736 1325 1011PMTQ 10418 (3) 5 1466 1169 1364 1083 1219 978 1071 874 1379 1105PMTQ 10518 (3) 7.5 1601 1252 1480 1150 1312 1023 1135 897 1498 1178PMTQ 10618 (3) 7.5 1673 1345 1557 1248 1399 1130 1235 1014 1574 1273PMTQ 10718 (3) 10 1829 1473 1704 1372 1532 1244 1358 1118 1722 1398PMTQ 10818 (3) 15 1987 1585 1848 1467 1653 1321 1450 1174 1868 1498PMTQ 10918 (3) 15 2054 1658 1914 1545 1723 1407 1529 1269 1934 1574

THERMAL PERFORMANCE



13

ENGINEERING & DIMENSIONS DATA

† Heaviest section is the pan section.Dimensions are subject to change. Do not use for pre-fabrication.When a remote sump arrangement is selected, the suction strainer is omitted; the unit is provided with an oversized outlet to facilitate drainage to the remote sump.

2 MPTMAKE-UP

4-1/418-1/4

50-3/844-3/4

9' 9-3/4"3-5/8

J

29

OVERSIZEDACCESS DOOR

8 BFW/GVDOUTLET

3 FPTDRAIN

3 FPTOVERFLOW

P

102-3/8

U

H

20

8 BFW/GVD INLET 71-7/8

11' 11-3/4"

7/8

2

P

10 BFW/GVD INLET108

18' 1/8"

7/8

2 MPTMAKE-UP

4-1/418-1/4

50-3/844-3/4

9' 9-3/4"3-5/8

J

29


10 BFW/GVDOUTLET

3 FPTDRAIN

3 FPTOVERFLOW

102-3/8

U

H

20

2

Table 7 Engineering Data PMTQ 10112 TO 10918

Model Heaviest Operating Height Upper Outlet InletNo. HP CFM Shipping Operating Section† Weight H C J P

PMTQ 10112 (2) 5 62,400 7,160 12,810 4,440 9,830 160-3/8 58 7-3/4 152-3/8PMTQ 10212 (2) 5 60,000 7,660 13,580 4,440 10,600 172-3/8 70 7-3/4 164-3/8PMTQ 10312 (2) 7.5 71,300 7,260 12,910 4,540 9,930 160-3/8 58 7-3/4 152-3/8PMTQ 10412 (2) 5 57,500 8,100 14,330 4,440 11,360 184-3/8 82 7-3/4 176-3/8PMTQ 10512 (2) 7.5 68,600 7,760 13,680 4,540 10,700 172-3/8 70 7-3/4 164-3/8PMTQ 10612 (2) 7.5 65,700 8,200 14,430 4,540 11,460 184-3/8 82 7-3/4 176-3/8PMTQ 10712 (2) 10 72,000 8,240 14,470 4,580 11,500 184-3/8 82 7-3/4 176-3/8PMTQ 10812 (2) 15 84,600 8,060 13,980 4,840 11,000 172-3/8 70 7-3/4 164-3/8PMTQ 10912 (2) 15 81,100 8,500 14,730 4,840 11,760 184-3/8 82 7-3/4 176-3/8

PMTQ 10118 (3) 5 94,100 11,230 19,960 7,370 15,440 160-3/8 58 9 151-3/8PMTQ 10218 (3) 5 90,400 11,960 21,100 7,370 16,580 172-3/8 70 9 163-3/8PMTQ 10318 (3) 7.5 107,500 11,390 20,120 7,530 15,600 160-3/8 58 9 151-3/8PMTQ 10418 (3) 5 86,700 12,620 22,240 7,370 17,720 184-3/8 82 9 175-3/8PMTQ 10518 (3) 7.5 103,300 12,120 21,260 7,530 16,740 172-3/8 70 9 163-3/8PMTQ 10618 (3) 7.5 99,100 12,780 22,400 7,530 17,880 184-3/8 82 9 175-3/8PMTQ 10718 (3) 10 108,500 12,830 22,450 7,580 17,930 184-3/8 82 9 175-3/8PMTQ 10818 (3) 15 127,500 12,560 21,700 7,970 17,180 172-3/8 70 9 163-3/8PMTQ 10918 (3) 15 122,300 13,220 22,840 7,970 18,320 184-3/8 82 9 175-3/8

Remote SumpWeights (lbs)Fans Dimensions (in.)

PMTQ 10112 thru 10912

PMTQ 10118 thru 10918





†



THERMAL PERFORMANCE



14



2 MPTMAKE-UP

4-1/4

18-1/4

50-3/844-3/4

9' 9-3/4"3-5/8

J

29


10 BFW/GVDOUTLET

3 FPTDRAIN

3 FPTOVERFLOW

102-3/8

U

H

20

2

P

(2) 8 BFW/GVD INLET71-7/8

24' 7/8"

7/8

3 MPTMAKE-UP

4-1/418-1/4

50-3/844-3/4

9' 9-3/4"3-5/8

J

29


(2) 10 BFW/GVDOUTLET

3 FPTDRAIN

3 FPTOVERFLOW

P102-3/8

U

H

20


36' 2"

7/8 7/8

2


Model Heaviest Operating Height Upper InletNo. HP CFM Shipping Operating Section† Weight H C P

PMTQ 10124 (4) 5 124,800 15,310 26,590 9,870 20,520 160-3/8 58 152-3/8PMTQ 10224 (4) 5 120,000 16,310 28,130 9,870 22,060 172-3/8 70 164-3/8PMTQ 10324 (4) 7.5 142,600 15,520 26,800 10,080 20,730 160-3/8 58 152-3/8PMTQ 10424 (4) 5 115,100 17,190 29,650 9,870 23,580 184-3/8 82 176-3/8PMTQ 10524 (4) 7.5 137,100 16,520 28,340 10,080 22,270 172-3/8 70 164-3/8PMTQ 10624 (4) 7.5 131,500 17,400 29,860 10,080 23,790 184-3/8 82 176-3/8PMTQ 10724 (4) 10 144,000 17,460 29,920 10,140 23,850 184-3/8 82 176-3/8PMTQ 10824 (4) 15 169,200 17,100 28,920 10,660 22,850 172-3/8 70 164-3/8PMTQ 10924 (4) 15 162,300 17,980 30,440 10,660 24,370 184-3/8 82 176-3/8

PMTQ 10136 (6) 5 187,300 22,530 39,370 14,370 30,200 160-3/8 58 152-3/8PMTQ 10236 (6) 5 180,000 24,030 41,680 14,370 32,510 172-3/8 70 164-3/8PMTQ 10336 (6) 7.5 214,000 22,840 39,680 14,680 30,510 160-3/8 58 152-3/8PMTQ 10436 (6) 5 172,700 25,350 43,960 14,370 34,790 184-3/8 82 176-3/8PMTQ 10536 (6) 7.5 205,700 24,340 41,990 14,680 32,820 172-3/8 70 164-3/8PMTQ 10636 (6) 7.5 197,300 25,660 44,270 14,680 35,100 184-3/8 82 176-3/8PMTQ 10736 (6) 10 216,100 25,760 44,370 14,780 35,200 184-3/8 82 176-3/8PMTQ 10836 (6) 15 253,800 25,230 42,880 15,570 33,710 172-3/8 70 164-3/8PMTQ 10936 (6) 15 243,400 26,550 45,160 15,570 35,990 184-3/8 82 176-3/8


PMTQ 10124 thru 10924

PMTQ 10136 thru 10936

15





†



THERMAL PERFORMANCE



16



2 MPTMAKE-UP

4-7/818-1/4

50-3/860-3/8

11' 10-3/8"3-5/8

J29


8 BFW/GVDOUTLET

3 FPT DRAIN

3 FPTOVERFLOW

102-3/8

U

H

20

2

P

8 BFW/GVDINLET

71-7/8

11' 11-3/4"

7/8

P

10 BFW/GVDINLET

108

18' 1/8"

7/8

2 MPTMAKE-UP

4-7/818-1/4

50-3/860-3/8

11' 10-3/8"3-5/8

J29


10 BFW/GVDOUTLET

3 FPT DRAIN

3 FPTOVERFLOW

102-3/8

U

H

20

2



PMTQ 12112 (2) 5 72,100 8,200 15,150 5,140 11,370 161-3/8 59 7-3/4 1533/8PMTQ 12212 (2) 5 69,300 8,760 16,030 5,140 12,260 173-3/8 71 7-3/4 165-3/8PMTQ 12312 (2) 7.5 82,500 8,310 15,260 5,250 11,480 161-3/8 59 7-3/4 153-3/8PMTQ 12412 (2) 5 66,400 9,280 16,940 5,140 13,170 185-3/8 83 7-3/4 177-3/8PMTQ 12512 (2) 7.5 79,300 8,870 16,140 5,250 12,370 173-3/8 71 7-3/4 165-3/8PMTQ 12612 (2) 7.5 76,000 9,390 17,050 5,250 13,280 185-3/8 83 7-3/4 177-3/8PMTQ 12712 (2) 10 83,500 9,420 17,080 5,280 13,310 185-3/8 83 7-3/4 177-3/8PMTQ 12812 (2) 15 98,600 9,160 16,430 5,540 12,660 173-3/8 71 7-3/4 165-3/8PMTQ 12912 (2) 15 94,600 9,680 17,340 5,540 13,570 185-3/8 83 7-3/4 177-3/8



PMTQ 12112 thru 12912

PMTQ 12118 thru 12918

17





†



THERMAL PERFORMANCE



18



P


36' 2"7/8 7/8

3 MPTMAKE-UP

4-7/818-1/4

50-3/860-3/8

11' 10-3/8"3-5/8

J

29


(2) 10 BFW/GVDOUTLET

3 FPTDRAIN

3 FPTOVERFLOW

102-3/8

U

H

20

2

P

(2) 10 BFW/GVD INLET120

40' 2"7/8 7/8






PMTQ 12136 thru 12936

PMTQ 12140 thru 12940

19





†



THERMAL PERFORMANCE



20



P

10 BFW/GVD INLET120

20' 1/4"

7/8

P


24' 7/8"

7/8

2 MPTMAKE-UP

4-7/818-1/4

50-3/860-3/8

11' 10-3/8"3-5/8

J

29


(2) 8 BFW/GVDOUTLET

3 FPTDRAIN

3 FPTOVERFLOW

102-3/8

U

H

20

2

2 MPTMAKE-UP

4-7/818-1/4

50-3/860-3/8

11' 10-3/8"3-5/8

J

29


10 BFW/GVDOUTLET

3 FPTDRAIN

3 FPTOVERFLOW

102-3/8

U

H

20

2

7/8




PMTQ 12124 (4) 5 144,100 16,690 30,440 10,570 22,740 161-3/8 59 7-3/4 153-3/8PMTQ 12224 (4) 5 138,600 17,810 32,220 10,570 24,510 173-3/8 71 7-3/4 165-3/8PMTQ 12324 (4) 7.5 165,000 16,900 30,650 10,780 22,950 161-3/8 59 7-3/4 153-3/8PMTQ 12424 (4) 5 132,900 18,850 34,030 10,570 26,320 185-3/8 83 7-3/4 177-3/8PMTQ 12524 (4) 7.5 158,600 18,020 32,430 10,780 24,720 173-3/8 71 7-3/4 165-3/8PMTQ 12624 (4) 7.5 152,100 19,060 34,240 10,780 26,530 185-3/8 83 7-3/4 177-3/8PMTQ 12724 (4) 10 167,000 19,130 34,310 10,850 26,600 185-3/8 83 7-3/4 177-3/8PMTQ 12824 (4) 15 197,200 18,610 33,020 11,370 25,310 173-3/8 71 7-3/4 165-3/8PMTQ 12924 (4) 15 189,100 19,650 34,830 11,370 27,120 185-3/8 83 7-3/4 177-3/8


PMTQ 12120 thru 12920

PMTQ 12124 thru 12924

21

OPTIONAL EQUIPMENT

22

Self Supporting Service PlatformsTowers are available with self-supporting service platforms thatinclude access ladders which are designed for easy field

installation. Thisoption offerssignificant savings incomparison to fieldconstructed, externallysupported catwalks.The Evapco serviceplatform option maybe installed on eitherside, or the endopposite theconnections.

Capacity ControlAll PMTQ models come standard with premium efficient,inverter capable fan motors that can be used with variablefrequency drive (VFD) systems for precise capacity control.VFD systems can control the speed of a fan motor bymodulating the voltage and frequency of the motor inputelectrical signal. When connected to a building automationsystem a VFD can receive signals varying fan speeds to meetdemand loads. This popular method of capacity control canyield significant energy savings.

Evapco offers two-speed fan motors as an option foralternative capacity control. In periods of lightened loads orreduced wetbulb temperatures the fans can operate at lowspeed providing about 60% of full speed capacity yetconsuming only about 15% of full speed power. In addition tothe energy savings the sound levels of the unit can be greatlyreduced by operating at low speed. These motors do notrequire the use of VFD systems however they can only operateat two speeds: full or low.

Screened Bottom PanelsProtective inlet screens are provided on the sides and/or endof the unit’s air intake. Screens are not provided below thefan section since most units are mounted on the roof or atground level. It is recommended that bottom screens beadded to the unit when it will be elevated. These screens canbe provided by the factory at an additional cost or added bythe installing contractor.

Remote Sump ConfigurationFor units operating in areas where temperatures may be verylow, or where low temperatures may occur during periodswhen the unit is not operating, a sump located inside thebuilding is the preferred means of ensuring that the basin waterwill not freeze. For these applications the tower will be suppliedsuction strainers and an oversized bottom outlet.

Electric Water Level ControlCooling towers may be orderedwith an electric water levelcontrol in lieu of the standardmechanical float and make-upassembly. This packageprovides accurate control ofwater levels and does notrequire field adjustment.

Basin Heater PackageIf a remote sump configuration is not practical, electric basinheater packages are available to help prevent freeze-up of thebasin water.

Steam or Hot Water CoilsPan coils are available as an alternate to the electric heatersdescribed above. Constructed of galvanized pipe installed thecooling tower basin, they are supplied less controls and areready for piping to an external steam or hot water source. Panwater heater controls should be interlocked with the watercirculating pump to prevent their operation when the pump is energized.

OPTIONAL EQUIPMENT

23

Pulse~Pure® Water Treatment System

The PMTQ is available with EVAPCO’s optional Pulse~Pure®

non-chemical water treatment system. The Pulse~Pure® Wa-ter Treatment System utilizes pulsed-power technology to pro-vide CHEMICAL FREE Water Treatment and is an environmentallyresponsible alternative for treating water in evaporative cooledequipment. It does not release harmful by-products to the en-vironment and eliminates costly chemicals completely from cool-er drift and blowdown. The Pulse~Pure® system delivers short,high-frequency bursts of low energy electromagnetic fields to therecirculating water in the PMTQ and will:

• Control Bacteria to Levels Well Below Most ChemicalWater Treatment Programs.

• Control the Formation of Mineral Scale on Heat-Exchange Surfaces.

• Save Water by Operating at Higher Cycles ofConcentration.

• Yield Corrosion Rates Equivalent to Chemical WaterTreatment.

More benefits of offering EVAPCO’s Pulse~Pure® WaterTreatment System on the new PMWQ are:

• Integral Cutting Edge Conductivity Control andBlowdown Packages that are contained in a single feeder panel:

Conductivity Control Package – Measures ConductivityUtilizing a Non-Fouling Torodial Probe and Features:

• One power connection of 120 volt or 460 volt is all that is required.

• USB port for downloadable 60 day audit trail of systemoperation.

• Self draining conductivity loop.

Motorized Blowdown Valve – Standard for the most reliableoperation in bleed control. Three-way valve operation providesgood bleed flow without a standing column of water.

Because ongoing water treatment service is an absoluterequirement for any evaporative cooled system, each purchaseof a Pulse~Pure® Water Treatment System includes, asstandard, a 1 year water treatment service and monitoringcontract provided by your EVAPCO Representative

EVAPCO’s Pulse~Pure® systemoffers PMTQ owners a single-source ofresponsibility for equipment, watertreatment and service.

U.S. Patent No. 7,704,364

24

OPTIONAL EQUIPMENT

Electric HeatersElectric immersion heaters are available factory installed in the basinof the tower. They are sized to maintain a +40° F pan watertemperature with the fans off and an ambient air temperature of 0°F.They are furnished with a combination thermostat/low waterprotection device to cycle the heater on when required and to preventthe heater elements from energizing unless they are completelysubmerged. All components are in weather proof enclosures foroutdoor use. The heater power contactors and electric wiring are notincluded as standard.

Models kW

PMTQ 10x12 8

PMTQ 10x14 (2) 6

PMTQ 10x24 (2) 8

PMTQ 10x36 (2)12

PMTQ 12x12 10

PMTQ 12x18 (2) 7

PMTQ 12x20 (2) 8

PMTQ 12x24 (2) 9

PMTQ 12x36 (2) 15

PMTQ 12x40 (2) 15

PMTQ Heater Sizes

STEEL SUPPORT

The recommended support for EVAPCO towers is structural “I”beams located under the outer flanges and running the entirelength of the unit. Mounting holes, 3/4” in diameter are locatedin the bottom channels of the pan section to provide for boltingto the structural steel. (Refer to certified drawings from thefactory for bolt hole locations.)Beams should be level to within 1/8” in 6’ before setting theunit in place. Do not level the unit by shimming between it andthe “I” beams as this will not provide proper longitudinalsupport.

A B

PMTQ Dimensions

10' Wide Models A B

PMTQ 10x12 11’ 11-3/4” 9’ 9-3/4”

PMTQ 10x14 18’ 1/8” 9’ 9-3/4”

PMTQ 10x24 24’ 7/8” 9’ 9-3/4”

PMTQ 10x36 36’ 2” 9’ 9-3/4”

12' Wide Models A B

PMTQ 12x12 11’ 11-3/4” 11’ 10-3/8”

PMTQ 12x18 18’ 1/8” 11’ 10-3/8”

PMTQ 12x20 20’ 1/4” 11’ 10-3/8”

PMTQ 12x24 24’ 7/8” 11’ 10-3/8”

PMTQ 12x36 36’ 2” 11’ 10-3/8”

PMTQ 12x40 40’ 2” 11’ 10-3/8”

25

APPLICATIONS

PipingCooling tower piping should be designed and installed inaccordance with generally accepted engineering practices. Allpiping should be anchored by properly designed hangars andsupports with allowance made for possible expansion andcontraction. No external loads should be placed upon coolingtower connections, nor should any of the piping supports beanchored to the unit framework.

Capacity ControlThe design wetbulb for which the tower is sized occurs only asmall percentage of the time. Unless colder watertemperatures are beneficial to the process being cooled, someform of capacity control will be needed. A common controlpractice is to cycle the fans off when leaving water is belowthe minimum allowable temperature. However, this does notprovide close control of the leaving water temperature andmay cycle the motor on and off more than the recommendedlimit of six (6) starts per hour. Another method is to use aVariable Frequency Drive (VFD) to control the fan speed. Whena VFD is utilized, EVAPCO recommends the use of inverterduty motors, which are available as standard.Another variable speed option is the use of a 2-speed fanmotor. This arrangement gives three (3) stages of capacitycontrol – 10% with the fans off, 60% (fans at 1/2 speed) and100% (fans at full speed).Variable speed motors also save operating costs. At half-speed,the motor draws approximately 15% of full load power. Sincemaximum wet bulb and maximum load seldomly coincide on airconditioning systems, the cooling tower will actually operate ata reduced speed most of the time. Contact the factory for amore detailed analysis. Caution: The water circulation pump must be interlockedwith the fan motor starter(s) to ensure water flow over thetower fill during fan operation.

Maintaining the Recirculated Water SystemThe cooling in a tower is accomplished by the evaporation of aportion of the recirculated spray water. As this water evaporates, itleaves behind its mineral content and impurities. Therefore, it isimportant to bleed-off an amount of water equal to that which isevaporated to prevent the build up of impurities. If this is notdone, the mineral content and/or the corrosive nature of the waterwill continue to increase. This will ultimately result in heavyscaling or a corrosive condition.

Bleed-offA bleed line should be installed in the piping, external to theunit. The bleed line must be properly sized for the application,and provided with a metering connection and globe valve. Therecommended bleed off for a cooling tower is 3 gpm per 100tons of cooling. If the make-up water supplying the unit isrelatively free of impurities, it may be possible to reduce theamount of bleed, but the unit must be inspected frequently tomake sure scale is not forming. Make-up water pressure mustbe maintained between 20 and 50 psi for proper operation ofthe standard float valve.

Water TreatmentIn some cases the make-up water will be so high in mineralcontent that a normal bleed-off will not prevent scaling. Inthis case, water treatment will be required and a reputablewater treatment company familiar with the local waterconditions should be consulted. Any chemical watertreatment used must be compatible with the materials ofconstruction of the unit. The pH of the water should bemaintained between 6.5 and 8.3. In order to prevent “whiterust”, the galvanized steel in the unit may require routinepassivation of the steel when operating in higher pH levels.Batch chemical feeding is not recommended because it doesnot afford the proper degree of control. If acid cleaning isrequired extreme caution must be exercised and onlyinhibited acids compatible with galvanized steel constructionshould be used.

Control of Biological ContaminationWater quality should be checked regularly for biologicalcontamination. If biological contamination is detected, a moreaggressive water treatment and mechanical cleaning programshould be undertaken. The water treatment program shouldbe performed by a qualified water treatment company. It isimportant that all internal surfaces be kept clean ofaccumulated dirt and sludge. In addition, the drift eliminatorsshould be maintained in good operating condition.

NOTE: The location of the cooling tower must be consideredduring the equipment layout stages of a project. It isimportant to prevent the discharge of air (potential ofbiological contamination) from being introduced into thefresh air intakes of the building

SPECIFICATIONS

26

SECTION 23 65 00 – FACTORY-FABRICATED COOLING TOWERSPART 1 – GENERAL1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including Generaland Supplementary Conditions and Division 1 SpecificationSections, apply to this section.

1.2 SUMMARY: A. This Section includes factory assembled and tested, open circuit,

forced draft counterflow cooling tower.1.3 SUBMITTALS

A. General. Submit the following:1. Certified drawings of the cooling tower, sound data,

recommended steel support indicating weight loadings, wiringdiagrams, installation instructions, operation and maintenanceinstructions, IBC certification, and thermal performanceguarantee by the manufacturer.

1.4 QUALITY ASSURANCEA. Verification of Performance:

1. Test and certify cooling tower thermal performance according toCTI Standard 201.

2. Test and certify cooling tower sound performance according toCTI ATC-128.

B. Meet or Exceed energy efficiency per ASHRAE 90.1.1.5 WARRANTY

A. Motor/Drive System: Five (5) year comprehensive warranty againstmaterials and workmanship including motor, fan, bearings,mechanical support, sheaves, bushings and belt.

B. Unit: One (1) year from start-up, not to exceed eighteen (18) monthsfrom shipment on the unit.

PART 2 - PRODUCTS2.1 MANUFACTURERS

A. Manufactures: Subject to compliance with requirements, providecooling towers manufactured by one of the following: 1. EVAPCO, Inc.2. Approved Substitute

2.2 MATERIALSA. Galvanized Sheet Steel complying with ASTM A 653/A 653M and

having G-235 designation.B. Optional Type 304 and/or 316 Stainless Steel as specified.

2.3 FORCED-DRAFT, COUNTERFLOW COOLING TOWERSA. Description: Factory assembled and tested, forced draft counterflow

cooling tower complete with fill, fan, louvers, accessories, andrigging supports.

B. Cooling Tower Characteristics and Capacities: Refer to the CoolingTower schedule.

C. Fan(s): 1. Type and Material: Axial propeller, one piece heavy duty FRP hub

and blade construction. Galvanized steel closely fitted fan cowlwith venturi air inlet for maximum fan efficiency, covered with aheavy gauge hot-dip galvanized steel fan guard. (Optional Type304 stainless steel).

2. Fan Housing: The complete drive system, including the electricmotor, belts, bearings, fan, and drives shall be completelyenclosed in a protective housing which covers the drive systemand provides sound reduction.

3. Maximum sound pressure level of _____dB(A) measured at 5 feetabove the fan discharge during full speed operation in accordancewith CTI Standard ATC-128.

D. Water Distribution System: Non-corrosive materials.1. Evenly distribute of water over fill material with pressurized spray

tree.a. Pipes: Schedule 40 PVC, Non-corrosive Materialsb. Nozzles: Non-clogging, ABS Plastic, threaded into branch piping.

2. Maximum pressure at inlet shall be ____ psig.

E. IBC Compliance: The unit structure shall be designed, analyzed,and constructed in accordance with the latest edition of theInternational Building Code (IBC) Regulations for seismic loads upto _____ g or wind loads up to __ psf.

F. Collection Basin Material: Heavy Gauge G-235 Galvanized Steel orType 304 Stainless Steel (Optional) for long life and durability:1. Removable Type 304L Stainless Steel strainer with openings

smaller than nozzle orifices.2. Joints: Bolted and sealed watertight.3. Overflow, Makeup and Drain connections: G-235 Galvanized Steel

(MPT).4. Outlet Connection: G-235 Galvanized Steel Beveled for weld and

grooved for mechanical coupling.G. Casing: Heavy Gauge G-235 Galvanized Steel (or Type 304 Stainless

Steel Optional):1. Casing panels shall totally encase the fill media to protect the fill

from damage due to direct atmospheric exposure. Allgalvanized steel panel edges shall be coated with a 95% purezinc compound during fabrication.

2. Fasteners: Corrosion resistance equal to or better than materialsbeing fastened.

3. Joints: Sealed watertight.4. Welded Connections: Continuous and watertight

H. Fill Media: PVC; resistant to rot, decay and biological attack; formed,crossfluted bonded together for strength and durability in block formatfor easy removal and replacement; suitable for use as a workingsurface; self extinguishing with flame spread rating of 5 per ASTME84-81a; able to withstand continuous operating temperature of130ºF; and fabricated, formed and installed by the manufacturer toensure water breaks up into droplets.

I. Drift Eliminators: Same material as Fill. 0.001% drift rate. J. Protective Air Inlet Screens: Galvanized SteelK. Water Level Control: Brass mechanical makeup water valve and

plastic float with an adjustable linkage.2.4 MOTORS AND DRIVES

A. General requirements for motors are specified in Division 23 Section“Motors”.

B. Enclosure Type: TEFCC. Motor Speed: Single speed, Premium efficient inverter capable

(2-speed)D. Drive: Power Band Belt designed for 150% of the motor nameplate

HP.1. Belt: V-belt type neoprene. 2. Sheaves: Aluminum alloy, taper lock design.3. Bearings: Heavy duty, self-aligning bearings with extended grease

lines and fittings. 4. Fan Shaft: Solid steel or hollow steel with forged bearing journals.5. Vibration Cutout Switch: Mechanical switch to de-energize fan

motors if excessive vibration in NEMA 4 enclosure.2.5 MAINTENANCE ACCESS

A. Access Door: A man-sized rectangular access door shall be locatedabove the basin to allow for easy access to the pan interior. AccessDoor shall be 54” tall by 27-7/32” wide.

B. Ladders: Aluminum, vertical complying with 29 CFR 1910.27.C. Optional platforms.

NOTES

27

World Headquarters/Research and Development Center

EVAPCO Facilities

WReD

Innovation, Performance, Experience

Visit EVAPCO’s Website at: http://www.evapco.com1.5M/09-10/DGD

EVAPCO...SPECIALISTS IN HEAT TRANSFERPRODUCTS AND SERVICES.

EVAPCO, Inc. — World Headquarters & Research/Development Center

EVAPCO, Inc.World HeadquartersP.O. Box 1300Westminster, MD 21158 USAPhone: 410-756-2600Fax: 410-756-6450E-mail: [email protected]

EVAPCO Asia/Pacific

EVAPCO Asia/Pacific Headquarters1159 Luoning Rd. Baoshan Industrial ZoneShanghai, P. R. China, Postal Code: 200949Phone: (86) 21-6687-7786Fax: (86) 21-6687-7008E-mail: [email protected]

EVAPCO Europe

EVAPCO Europe, N.V.European HeadquartersIndustrieterrein Oost 40103700 Tongeren, BelgiumPhone: (32) 12-395029Fax: (32) 12-238527E-mail: [email protected]

EVAPCO East5151 Allendale LaneTaneytown, MD 21787 USAPhone: 410-756-2600Fax: 410-756-6450E-mail: [email protected]

EVAPCO Midwest1723 York RoadGreenup, IL 62428 USAPhone: 217-923-3431Fax: 217-923-3300E-mail: [email protected]

EVAPCO West1900 West Almond AvenueMadera, CA 93637 USAPhone: 559-673-2207Fax: 559-673-2378E-mail: [email protected]

EVAPCO Iowa925 Quality DriveLake View, IA 51450 USAPhone: 712-657-3223Fax: 712-657-3226

EVAPCO IowaSales & Engineering1234 Brady BoulevardOwatonna, MN 55060 USAPhone: 507-446-8005Fax: 507-446-8239E-mail: [email protected]

Refrigeration Valves & Systems CorporationA wholly owned subsidiary of EVAPCO, Inc.1520 Crosswind Dr.Bryan, TX 77808 USAPhone: 979-778-0095Fax: 979-778-0030E-mail: [email protected]

McCormack Coil Company, Inc.A wholly owned subsidiary of EVAPCO, Inc.P.O. Box 17276333 S.W. Lakeview BoulevardLake Oswego, OR 97035 USAPhone: 503-639-2137Fax: 503-639-1800E-mail: [email protected]

EvapTech, Inc.A wholly owned subsidiary of EVAPCO, Inc.8331 Nieman RoadLenexa, KS 66214 USAPhone: 913-322-5165Fax: 913-322-5166E-mail: [email protected]

Tower Components, Inc.A wholly owned subsidiary of EVAPCO, Inc.5960 US HWY 64ERamseur, NC 27316Phone: 336-824-2102Fax: 336-824-2190E-mail: [email protected]

EVAPCO Newton701 East Jourdan StreetNewton, IL 62448 USAPhone: 618-783-3433Fax: 618-783-3499E-mail: [email protected]

EVAPCO Europe, S.r.l.Via Ciro Menotti 10I-20017 Passirana di RhoMilan, ItalyPhone: (39) 02-939-9041Fax: (39) 02-935-00840E-mail: [email protected] Europe, S.r.l.Via Dosso 223020 Piateda Sondrio, ItalyEVAPCO Europe, GmbHBovert 22D-40670 Meerbusch, GermanyPhone: (49) 2159-69560Fax: (49) 2159-695611E-mail: [email protected] coil a/sA wholly owned subsidiary of EVAPCO, Inc.Knøsgårdvej 115DK-9440 Aabybro DenmarkPhone: (45) 9824 4999Fax: (45) 9824 4990E-mail: [email protected] S.A. (Pty.) Ltd.A licensed manufacturer of EVAPCO, Inc.18 Quality RoadIsando 1600Republic of South AfricaPhone: (27) 11-392-6630Fax: (27) 11-392-6615E-mail: [email protected] Engineering Industries Co.A licensed manufacturer of EVAPCO, Inc.5 Al Nasr Road St.Nasr City, Cairo, EgyptPhone: (20) 2-290-7483/(20) 2-291-3610Fax: (20) 2-404-4667/ (20) 2-290-0892E-mail: [email protected]

Evapco (Shanghai) Refrigeration Equipment Co., Ltd.1159 Louning Rd., Baoshan Industrial ZoneShanghai, P.R. China, Postal Code: 200949Phone: (86) 21-6687-7786Fax: (86) 21-6687-7008E-mail: [email protected]

Beijing EVAPCO Refrigeration Equipment Co., Ltd.Yan Qi Industrial Development DistrictHuai Rou County Beijing, P.R. China, Postal Code: 101407Phone: (86) 10 6166-7238Fax: (86) 10 6166-7395E-mail: [email protected]

Evapco Australia (Pty.) Ltd.34-42 Melbourne RoadP.O. Box 436Riverstone, N.S.W. Australia 2765Phone: (61) 2 9627-3322Fax: (61) 2 9627-1715E-mail: [email protected]

EvapTech Asia Pacific Sdn. BhdA wholly owned subsidiary of EvapTech, Inc.IOI Business Park, 2/F Unit 20Persiaran Puchong Jaya SelatanBandar Puchong Jaya,47170 Puchong, Selangor, MalaysiaPhone: (60-3) 8070 7255Fax: (60-3) 8070 5731E-mail: [email protected]

EVAPCO North America

EVAPCO, Inc. • P.O. Box 1300 • Westminster, MD 21158 USAPHONE: 410-756-2600 • FAX: 410-756-6450 • E-MAIL: [email protected]

Bulletin 314

Documents

Forced Draft, Axial Fan Models Available in Capacities ... The pump section connection strainer is one component subject to excessive wear and corrosion. EVAPCO provides a Type 304L