Section 236500
Cooling Towers
	PART 1 GENERAL
1.01	SECTION INCLUDES
A.	Closed circuit, induced draft, crossflow cooling towers.
1.02	REFERENCE STANDARDS
A.	ASHRAE 90.1-2019 – Energy Standard for Buildings Except Low-Rise Residential Buildings.
B.	ASME B31.5 - Refrigeration Piping and Heat Transfer Components 2016.
C.	ASME Section VIII Boiler and Pressure Vessel Code.
D.	ASTM A123/A123M - Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products 2017.
E.	ASTM A653/A653M - Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process 2018.
F.	ASTM B117 - Standard Practice for Operating Salt Spray (Fog) Apparatus 2018.
G.	ASTM E84 - Standard Test Method for Surface Burning Characteristics of Building Materials 2018b.
H.	ASTM D2794 - Standard Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact).
I.	ABMA STD 9 - Load Ratings and Fatigue Life for Ball Bearings 2015.
J.	ABMA STD 11 - Load Ratings and Fatigue Life for Roller Bearings 2014.
K.	CTI STD-201 OM - Operations Manual for Thermal Performance Certification of Evaporative Heat Rejection Equipment 2017.
L.	CTI STD-201 RS - Performance Rating of Evaporative Heat Rejection Equipment 2017.
M.	CTI STD-111 - Gear Speed Reducers for Application on Industrial Water Cooling Towers; 2009. (Only for gear-driven products)
N.	ISO 9001 - Quality management systems -- Requirements 2015.
O.	NEMA MG 1 - Motors and Generators 2017.
P.	ASCE/SEI 7 - Minimum Design Loads and Associated Criteria for Buildings and Other Structures.
1.03	SUBMITTALS
A.	Product Data: Provide rated capacities, dimensions, weights and point loadings, accessories, electrical requirements and wiring diagrams, and location and size of field connections. 
B.	Shop Drawings: Indicate suggested structural steel supports including dimensions, sizes, and locations for mounting bolt holes.
C.	Manufacturer's Certificate: Certify that cooling tower performance, based on CTI STD-201 meets or exceeds specified requirements and submit performance curve plotting leaving water temperature against wet bulb temperature.
D.	Manufacturer's Instructions: Submit manufacturer's complete installation instructions.
E.	Operation and Maintenance Data: Include start-up instructions, maintenance data, parts lists, controls, and accessories.
F.	Warranty: Submit manufacturer's warranty and ensure forms have been filled out in Owner's name and registered with manufacturer.
1.04	QUALITY ASSURANCE
A.	Manufacturer Qualifications:  Company specializing in manufacturing the type of products specified in this section, with minimum 20 years of documented experience and ISO 9001 certification.  
B.	Installer Qualifications: Company specializing in performing the type of work specified in this section with minimum 20 years of experience and approved by manufacturer.
C.	Product Performance: 
1.	Cooling tower must have a minimum energy rating of [_____] per ASHRAE 90.1, 189 and CA Title 24.
2.	Structural and Seismic Performance: The structure will be designed, tested and certified in accordance with IBC regulations to meet a minimum unrestricted seismic design SDS = ___ g with an Importance Factor of ___ and wind load of __ psf.  Units not provided with a certificate of IBC compliance will not be an acceptable alternative.
1.05	DELIVERY, STORAGE, AND HANDLING
A.	Equipment will be factory-assembled, including cold water basin, heat transfer section, water distribution, fan drive system, and casing panels. For shipping, disassemble into as large as practical sub-assemblies so that minimum amount of field work is required for re-assembly. 
B.	Comply with manufacturer's installation instructions for rigging, unloading, and transporting units.
1.06	WARRANTY
A.	One-year warranty after start-up, or eighteen months from date of shipment, whichever occurs first. Warranty to include coverage for defects in material and workmanship.
B.	Fans, fan shafts, bearings, sheaves, gearboxes, drive shafts, couplings, and mechanical equipment support must be warranted against defects in materials and workmanship for a period of five (5) years or seven (7), if motor space heater is properly wired.
C.	For direct drive fan system: Fans, fan shafts, bearings, sheaves, gearboxes, drive shafts, couplings, and mechanical equipment support must be warranted against defects in materials and workmanship for a period of seven (7) from date of shipment. Included VFD will have 5-year warranty. 
	PART 2 PRODUCTS
2.01	MANUFACTURERS
A.	Closed Circuit, Induced Draft, Crossflow Cooling Towers:
1.	Basis of Design: Baltimore Aircoil Company; FXV or FXV3: www.baltimoreaircoil.com #BAC
2.02	MANUFACTURED UNITS
A.	Provide units suited for outdoor use, factory-assembled, induced draft with vertical discharge, and fan assemblies built into casing.
2.03	COMPONENTS
A.	Cold Water Basin:
1.	Constructed with a minimum of 14-gauge galvanized steel with access doors at both ends of tower to air plenum. Provide sloped basin with drain/clean-out connection. 
----- ALTERNATE for TriArmor -----
2.	Tri-layer protection system consisting of G-235 galvanized steel, a thermosetting hybrid polymer, and a polyurethane liner factory applied to all submerged surfaces and will be warranted against leaks and corrosion for five (5) years. A welded Type 316 stainless steel basin is an acceptable alternative. A 5-year leak and corrosion warranty covering the basin must be included.
----- ALTERNATE for 304 Stainless Steel -----
3.	Type 304 welded stainless steel panels and structural members. All factory seams in the cold water basin will be welded to ensure watertight assembly and welded seams will be warranted against leaks for five (5) years. Sloped with depressed section with drain/clean-out connection.  Basins with bolted seams or constructed of 301 stainless steel are not acceptable. 
----- ALTERNATE for 316 Stainless Steel -----
4.	Type 316 welded stainless steel panels and structural members. All factory seams in the cold water basin will be welded to ensure watertight assembly and welded seams will be warranted against leaks for five (5) years. Sloped with depressed section with drain/clean-out connection. Basins with bolted seams or constructed of 301 stainless steel are not acceptable.
----- ALTERNATE for Basinless Construction (FXV3 Only) -----
5.	The unit will be provided without an integral cold water basin. The unit will be mounted on a separate concrete cold water basin provided by others, to allow cooling water to pass directly from the fill into the basin.
B.	Water Distribution System
1.	Water will be distributed evenly over the coil at a flow rate sufficient to ensure complete wetting of the coil at all times. Large diameter, non-clog, 360° plastic distribution nozzles will utilize a two-stage diffusion pattern to provide overlapping, umbrella spray patterns that create multiple intersection points with adjacent nozzles. The branches and spray nozzles will be held in place by snap-in rubber grommets, allowing quick removal of individual nozzles or complete branches for cleaning or flushing. Distribution system must be able to be inspected while the unit is in operation. 
2.	Spray Water Pump(s): The closed circuit cooling tower will include an appropriate number of close coupled, bronze-fitted centrifugal pump and motor assemblies equipped with mechanical seal, and piped from the suction connection to the water distribution system. The pump motor(s) will be the totally enclosed fan cooled (TEFC) type, premium efficiency suitable for _____ volts, ___ phase, and ____ hertz electrical service. The system will include a metering valve and bleed line to control the bleed rate from the pump discharge to the overflow connection.
3.	(Optional for FXV only) Redundant Spray Water System: The closed circuit cooling tower will include (2) two close coupled, bronze-fitted centrifugal pump and motor assemblies piped from the suction connection to the water distribution system, with each pump sized for 100% redundant spray water flow.  This system includes all piping and isolation valves that allow for pump service while the equipment remains in operation.  Bypass valves with tubing are factory-installed to avoid stagnant water in the piping system.  Each isolation valve handle can be removed in the future and replaced with actuators and controls for automatic lead/lag operation and pump exercising in the field via BAS.  The system will also include a metering valve and bleed line to control the bleed rate from the pump discharge to the overflow connection.
C.	Casing Panels and Framework:
1.	(FXV3 Only) Casing panels will be constructed of corrosion and UV-resistant fiberglass reinforced polyester (FRP) or Type 304 stainless steel to minimize maintenance requirements and prolong equipment life.
----- ALTERNATE for Thermosetting Hybrid Polymer Panels-----
2.	Casing panels: Galvanized steel protected by a thermosetting hybrid polymer. The polymer to consist of G-235 (Z700 metric) galvanized steel prepared in a four-step (clean, pre-treat, rinse, and dry) process with an electrostatically applied, thermosetting, hybrid polymer fuse-bonded to the substrate during a thermally activated curing stage and monitored by a 23-step quality assurance program. Other coatings must be submitted to the engineer for pre-approval. Approved equals must have undergone testing, resulting in the following results as a minimum:
a.	When X-scribed to the steel substrate, unit to withstand 6000 hours of 5 percent salt spray per ASTM B117 without blistering, chipping, or loss of adhesion.
b.	When X-scribed to the steel substrate, unit to withstand 6000 hours of exposure to acidic (pH=4.0) and alkaline (pH=11.0) water solutions at 95 degrees F (35 degrees C) without signs of chemical attack.
c.	Unit to withstand impact of 160 in-lbs per ASTM D2794 without fracture or delamination of the polymer layer.
d.	Unit to withstand 6000 hours of ultraviolet radiation equivalent to 120,000 hours of noontime sun exposure without loss of functional properties.
e.	Unit to withstand 200 thermal shock cycles between minus 25 degrees F and 180 degrees F (minus 32 degrees C and 82 degrees C) without loss of adhesion or other deterioration.
f.	Unit to withstand 6000 hours of exposure to 60 psi (42,184 kg/m^2) water jet without signs of wear or erosion.
g.	Type 304 stainless steel may be supplied as an equal to eliminate the need for passivation, minimize maintenance requirements, and prolong equipment life.
----- ALTERNATE for Galvanized Steel Panels-----
3.	Casing panels and framework will be constructed of G235 galvanized steel.
----- ALTERNATE for 304 Stainless Steel Panels-----
4.	Casing panels, framework, and fasteners will be constructed of Type 304 stainless steel. Type 301 stainless steel is not an acceptable alternative.
----- ALTERNATE for 316 Stainless Steel Panels-----
5.	Casing panels, framework, and fasteners will be constructed of Type 316 stainless steel. Type 301 or 304 stainless steel is not an acceptable alternative.
D.	Air Inlet Louvers
-----Combined inlet shields (PVC) – Standard on FXV, Optional on FXV3----
1.	PVC Inlet Shields: Louver sections will be individually removable sections. The combined inlet shields will be UV resistant PVC, installed on the air inlet face to minimize air resistance, prevent water splash out, and minimize sunlight exposure to reduce the potential for algae growth in the cold water basin.  
-----ALTERNATE for FRP Louvers – FXV3 Only----
2.	Fiberglass Reinforced Polyester (FRP) Louvers: Air inlet louvers will be separate from the fill and removable to provide easy access for inspection of the air/water interface at the louver face. Louvers will prevent water splash out during fan cycling and be constructed of maintenance free, corrosion and UV resistant FRP.
----- ALTERNATE for Steel Louvers – FXV3 Only-----
3.	Steel Louvers: Air inlet louvers will be separate from the fill and removable to provide easy access for inspection of the air/water interface at the louver face. Louvers will prevent water splash out during fan cycling. Material of construction must match steel grade of casing panels. 
4.	 (Optional) Air Intake Screens: 
a.	A removable galvanized steel wire mesh screen with 1”x1” openings will cover air intake areas.
----- ALTERNATE for Stainless Steel Screens----
b.	A removable stainless steel wire mesh screen with 1”x1” openings will cover air intake areas. 
E.	Fans:  Multi blade, axial type. Fans must factory test-mounted, balanced, and aligned to ensure reliable operation and ease of maintenance. Fan type will be selected to meet sound ratings published on equipment schedule. 
F.	Motors: 
1.	Single speed (1800 rpm) mounted on adjustable steel base. Motors must be premium efficiency, cooling tower duty, and mounted on an interior adjustable base which allows the motor to slide to the exterior of the unit for servicing or removal. Access panels must be provided for motor removal through the side of the unit, avoiding removal of the fan for motor replacement. Motors will include an internal space heater that can be wired to remove condensation when motor is not in use.
----- Alternate for ENDURADRIVE Fan System -----
2.	Direct Drive Motor: See Direct Drive Fan System (2.03 G)
G.	Fan Drive System:
1.	Belt Drive: Designed for minimum 150 percent motor nameplate power. Fan and motor sheave(s) will be fabricated from corrosion-resistant materials to minimize maintenance and ensure maximum drive and powerband operating life. Bearings must have a minimum L-10 life of 80,000 hours per ABMA STD 11 and will include extended grease fittings. Belt tension must be easily adjusted in the field. 
----- ALTERNATE ENDURADRIVE Fan System – FXV3 Only -----
2.	Direct Drive Fan System (FXV3 Only): The motor will be directly connected to the fan shaft within the airstream, eliminating the need for couplings, right-angle gears, belts, or sheaves.  
a.	Quality Assurance 
1)	Tower thermal performance must be certified per CTI STD-201.
2)	Manufactured under ISO 9001 approved quality assurance program. 
3)	Seismic shake table tested per ICC-ES A156; must meet local Sds requirement but cannot be less than 0.50.
4)	Tested and certified to operate continuously at 104°F ambient wet bulb temperature. 
5)	Compatible VFD supplied by tower manufacturer; see VFD specification for details. 
b.	(OPTIONAL) Factory Test: The motor will be wired and tested prior to shipping. Testing done on-site is not acceptable. Testing will include:
(a)	Installation of unit on a test stand for a visual/audible inspection to confirm no excess movement or unusual noises exist.
(b)	Wiring of motor to a VFD.
(c)	Running the motor to a specified speed/frequency and taking measurements of power draw to ensure appropriate loading is being achieved.
(d)	Documentation of testing results supplied in the customer’s documents.
c.	General  
1)	CSA Label and CE mark for safety compliance. 
2)	Totally Enclosed Air Over (TEAO) IP56 rating. 
3)	Interior permanent magnet rotor construction; synchronous design; magnets enclosed inside the rotor lamination; magnets with high temperature grade capable of 200°C conditions without loss of magnetization. 
4)	Compliance with NEMA MG 1 part 31 standards for definite-purpose inverter-fed motors suitable for 2000 volt peak at 10,000 volt per microsecond.
d.	Components 
1)	Bearing isolator (seal) on motor shaft provided with shaft grounding device, utilizing two carbon grounding brushes to eliminate bearing currents.
2)	Salient pole permanent magnet design rotor resulting in no I²R losses. 
3)	Stator consisting of low-loss C5a coated electrical steel. 
4)	Integral stator cooling fins, not a shaft mounted fan, for controlling rotor and stator temperatures during operation. 
5)	Class H insulation system rated at 1850 Volts peak, and thermally-rated wire when tested per ASTM D-2307 for 600,000 hours extrapolated life at 155°C minimum. 
6)	Shaft sealed by three O-rings, with two conductive O-rings to properly ground the bearing, eliminating damaging currents in the bearings.
7)	Oversized conduit box with provisions for grounding inside. 
8)	Integral condensate drain system. 
9)	Three normally closed thermostats, one per phase.
10)	Open ball bearings with a minimum L10 life of 100,000 hours. 
11)	Bearings sized to handle unbalanced loads based on an ISO Balance Grade of 6.3.  
12)	Re-greaseable bearing system including stainless steel inlet fitting and grease drain provided with square stainless-steel square head pipe plugs. 
13)	E-coat primer on cast iron parts prior to application of top coat.  
14)	Enhanced cooling tower duty paint that withstands 1000 hour salt fog test. 
----- ALTERNATE Internal Gear Drive -----
3.	Gear Drive with Internal Motor: Industrial duty, right angle gear designed in accordance with CTI STD-111. Gear must be rated for service factor of 2.0 with forward and reverse operation. Oil level fill port and sight glass are located on the gear. Gear is connected to motor by flexible coupling.
----- ALTERNATE External Gear Drive -----
4.	Gear Drive with External Motor: Industrial duty, right angle gear designed in accordance with CTI STD-111. Gear must be rated for service factor of 2.0 with forward and reverse operation. Oil level fill port and sight glass are located on the gear. Gear is connected to motor with a drive shaft.
H.	Fan Guard:
1.	Welded steel rod and wire guard, hot dipped galvanized after fabrication. Installed over fan discharge. 
-----ALTERNATE for Stainless Steel Fan Guard-----
2.	Welded stainless steel rod and wire guard, placed over fan discharge. 
I.	Motor Removal Davit (Optional): The unit will be equipped with a motor removal davit. The motor will lower from the mechanical equipment supports down to grade. Davit will attach to the unit without the need for tools. If tools are required for davit installation or removal, provide (1) davit for each motor provided.
J.	Heat Transfer Coils:
1.	Galvanized Steel: The coil will be constructed of continuous serpentine all prime surface steel, be pneumatically tested at 375 psig (2,685 kPa), and be hot-dip galvanized after fabrication. The coil will be designed for free drainage of fluid and will be ASME B31.5 compliant. Maximum allowable working pressure will be 300 psig (280 psig for coils supplied with a CRN).
----- Alternate for Half Coil Finning -----
2.	Optional Extended Surface Coil for Half the Rows (FXV only): The coil will be constructed of continuous serpentine all prime surface steel with half the rows finned at 5 fins per inch for seasonal wet/dry operation. The coils will be pneumatically tested at 375 psig (2,685 kPa) and be hot-dip galvanized after fabrication. ASME B31.5 compliant and sloped for complete draining. Maximum allowable working pressure will be 300 psig (280 psig for coils supplied with a CRN).
----- Alternate for Full Coil Finning -----
3.	Optional Extended Surface Coil for All the Rows (FXV Only): The coil will be constructed of continuous serpentine all prime surface steel with all the rows finned at 5 fins per inch for seasonal wet/dry operation. The coils will be pneumatically tested at 375 psig (2,685 kPa), and be hot-dip galvanized after fabrication. ASME B31.5 compliant and sloped for complete draining. Maximum allowable working pressure will be 300 psig (280 psig for coils supplied with a CRN).
----- Alternate for 304 Stainless Steel Coil -----
4.	304 Stainless Steel:
1)	Coil(s) will be constructed of type 304 stainless steel serpentine tube. Tubes will be sloped for free drainage and coil assembly will be pneumatically tested at 375 psig (2,685 kPa). Coil(s) will be ASME B31.5 compliant.
----- Alternate for Cleanable Coil-----
5.	Cleanable Coil:
1)	Coil(s) to be constructed with straight full-length tubes, pitched in the direction of fluid flow for free drainage, and pneumatically tested at 125 psig (895 kPa). Full-height box headers and removable cover plates allow access to all tubes at both ends. The entire assembly is hot-dip galvanized after fabrication, inside and out.
----- Alternate for Cleanable Header Coil-----
6.	Cleanable Header:
1)	Coil(s) to be constructed of continuous serpentine prime surface carbon steel, with a hot-dip galvanized (after fabrication) outside surface. Inlet and outlet headers have removable cover plates, and elbowed fluid inlet and outlet connections to allow removal of the cover plates without disturbing fluid piping. Coil(s) will be pneumatically tested at 125 psig (895 kPa).
----- Alternate for ASME Coil-----
7.	ASME Coils:
1)	Coil(s) will be designed and constructed to meet the requirements of ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, and bear the U stamp.
K.	Fill:
1.	The fill and integral drift eliminators will be formed from self-extinguishing (per ASTM-568) polyvinyl chloride (PVC) having a flame spread rating of 5 per ASTM E84 and will be impervious to rot, decay, fungus and biological attack. The fill is suitable for entering water temperatures up to and including 130°F (54.4°C). The fill must be manufactured, tested and rated by the cooling tower manufacturer and are elevated above the cold water basin floor to facilitate cleaning.  If louvers are attached to fill, a spare set of fill sheets are required in case of icing and scaling damage. 
----ALTERNATE for High-Temp Fill----
2.	The fill and integral drift eliminators will be formed from self-extinguishing (per ASTM-568) chlorinated polyvinyl chloride (CPVC) having a flame spread rating of 5 per ASTM E84 and will be impervious to rot, decay, fungus and biological attack. The fill is suitable for entering water temperatures up to and including 140°F (60.0°C). The fill must be manufactured, tested and rated by the cooling tower manufacturer and are elevated above the cold water basin floor to facilitate cleaning.  If louvers are attached to fill, a spare set of fill sheets are required in case of premature icing and scaling. 
L.	Drift Eliminators: Three-pass design made of PVC material. Primary eliminators will be integrated into the fill media.
M.	Basin Water Level Control: 
1.	Corrosion resistant PVC make-up valve with plastic float for easy adjustment of operating water level.
----- ALTERNATE for Electric Water Level Controller-----
2.	Electric water level control with NEMA 4 enclosure, solid state controls, LED status light, and stainless steel water level sensing electrodes. Number and position of probes provided to sense the following: high water level, low water level, high water alarm level, low water alarm level, heater safety cutout, and automatic solenoid valve. Include all necessary mounting hardware. 
2.04	ACCESSORIES
A.	(Optional) Electric Immersion Heaters: In pan suitable to maintain temperature of water in pan at 40 degrees F (4.4 degrees C) when outside temperature is 0 degrees F (-17.7 degrees C) [OR -20 degrees F (-28.9 degrees C)] and wind velocity is 15 mph (25 kph); immersion thermostat and float control operate heaters on low temperature when the pan is filled. Heaters will be constructed of copper.
B.	(Optional) Basin Sweeper Piping: The cold water basin of the cooling tower will be equipped with PVC sump sweeper piping with plastic eductor nozzles. The piping must be designed specifically for the size and shape of the basin to ensure full agitation.
C.	(Optional) Fan Cylinder Extension: To extend the height of the tower equal to the surrounding enclosure, the cooling tower will be provided with _____inches (mm) of fan cylinder extension. The fan cylinder extension will match the construction of the fan deck.
D.	Vibration Switch:  
1.	Provide a mechanical local reset vibration switch. The mechanical vibration cutout switch will be guaranteed to trip at a point so as not to cause damage to the cooling tower. To ensure this, the trip point will be set in a frequency range of 0 to 3,600 RPM and a trip point of 0.2 to 2.0 g’s.
----- ALTERNATE for Electronic Vibration Switch----- 
2.	Provide an electronic remote reset vibration switch with contact for BAS monitoring. Wiring will be by the installing contractor. The electronic vibration cutout switch will be set to trip at a point so as not to cause damage to the cooling tower. To ensure this, the trip point will be set in a frequency range of 2 to 1000 Hertz and a trip point of 0.45 in/sec (0.0114 m/sec).
E.	Access Packages: See submittal documents for access package requirements. Platforms and ladders must ship assembled from cooling tower manufacturer.
1.	Plenum Access: Two hinged access doors must be provided for access into the plenum section. Include an internal walkway for inspection and maintenance. All working surfaces will be able to withstand 50 psf (244 kg/m^2) live load or 200 pound (90.7 kg) concentrated load. Other components of the cooling tower, i.e. basin and fill/drift eliminators, will not be considered an internal working surface. Cooling tower manufacturers that promote these surfaces to be used as a working platform will provide a two-year extended warranty to the Owner to repair any damage to these surfaces caused during routine maintenance.
2.	(Optional) Fan Deck Ladder with Handrails: An aluminum ladder with galvanized steel safety cage and safety gate will be provided for access to the fan deck. Access door or service platforms are not acceptable. 1-1/4 inch (32 mm) galvanized steel pipe handrail will be provided around the perimeter of the cooling tower cells. The handrails will be provided with knee and toe rails and will conform to OSHA requirements applicable at the time of shipment.
3.	(Optional) Louver Face External Platforms: Easy access to the hot water basins for inspection of spray water distribution, even during tower operation, will be provided by external platforms at the louver face. Fan deck ladders and handrails, which add to the overall height of the tower, are not acceptable. Platforms and ladders must ship assembled from cooling tower manufacturer.0 degrees F (-17.7 degrees C)
4.	(Optional) Internal Platform: An internal platform will be provided in the plenum section to provide for inspection and maintenance. All working surfaces will be able to withstand 50 psf (244 kg/m^2) live load or 200 pound (90.7 kg) concentrated load. Platforms and ladders must ship assembled from cooling tower manufacturer.
5.	(Optional) Access Door Platform: An external galvanized steel access platform at the access door of the unit(s) provides access to the spray distribution system or internal plenum. An aluminum ladder and 1-1/4 inch (32 mm) galvanized steel pipe safety railing is included with the platform. This option meets pertinent OSHA standards. Platforms and ladders must ship assembled from cooling tower manufacturer.
6.	(Optional) Safety Gates: All handrail access openings will be provided with a self-closing safety gate for increased safety. 
F.	(Optional) Sound Attenuation: 
1.	Discharge Sound Attenuation: The unit will be equipped with straight discharge attenuation with sound absorbing fiberglass acoustical baffles to reduce sound levels from the top of the unit.
2.	Intake Sound Attenuation: The unit will be equipped with attenuation at the unit’s air intake. Sound absorbing fiberglass acoustical baffles will reduce sound levels from the air intake side of the unit.
G.	(Optional – FXV3 Only) Velocity Recovery Stacks: A conical shaped fan cowl extension will be provided that allows for increased cooling tower performance. Increase in thermal performance must be certified per CTI STD 201. VR stack material of construction will match unit. 
	PART 3 EXECUTION
3.01	INSTALLATION
A.	Install in accordance with manufacturer's instructions.
B.	Provide the services of the manufacturer's field representative to supervise rigging, hoisting, and installation, allowing for minimum of one eight-hour day per tower.
C.	Install tower on structural steel beams as instructed by manufacturer.
D.	Connect condenser water piping to tower. Pitch condenser water supply to tower and condenser water suction away from tower. 
E.	Connect make-up water piping to tower. Pitch to tower. 
F.	Connect overflow and drain to acceptable discharge point as required by jurisdiction.
3.02	FIELD QUALITY CONTROL
A.	See Quality Requirements, for additional requirements.
B.	Provide the services of the manufacturer's field representative to inspect tower after installation and submit report prior to start-up, verifying installation is in accordance with specifications and manufacturer's recommendations.
3.03	SYSTEM STARTUP
A.	Start-up tower in presence of and instruct Owner 's operating personnel.
3.04	SCHEDULES
A.	Closed-Circuit Cooling Towers
1.	Drawing Code:
2.	Location:
3.	Manufacturer:
4.	Model Number:
5.	Cooling Capacity
a.	Water Flow Rate:
b.	Entering Water Temperature:
c.	Leaving Water Temperature:
6.	Entering Air WB Temperature:
7.	Number of Fan Motors:
8.	Motor Size:
9.	Fan Motor Electrical Characteristics: [_____] Volts, Three-Phase, 60 Hz.
10.	Pump Motor Electrical Characteristics: [_____] Volts, Three-Phase, 60 Hz.
11.	Basin Heaters No. and Type:

END OF SECTION