Attachment 3 - MAHG251003 APPENDIX B SPECS.pdf

APPENDIX B SPECIFICATIONS:

COOLING TOWER SPECIFICATIONS

▪ Factory assembled 1-Cell crossflow cooling tower.

o 1500 gpm

▪ 95.0 F Hot water

▪ 85.0 F Cold water

▪ 80.0 F Entering WB o Motor: NEMA 30 HP 1 speed/1 wind

▪ 3 phase /60 Hz/ 230/460v

▪ 1.2sf / TEFC 1800 RPM

▪ Inverter duty nameplated o Base Tower Construction/Equipment:

▪ Stainless Steel casing.

▪ Stainless Steel structure.

▪ Stainless Steel (per SS Grade) collection basin.

▪ Stainless Steel (per SS Grade) distribution basin.

▪ All stainless steel is series 300.

▪ Low sound fan with aluminum blades.

▪ Geareducer with 5-year warranty.

▪ Motor mounted outside the moist air stream.

▪ 15 mil PVC film fill with integral louvers and drift eliminators.

▪ Series 300 stainless steel fan guard o Collection Basin Connection and Accessories:

▪ All flanges are to be Class 125 ANSI B16.1 standard.

▪ All threads are to be American Standard Pipe Taper Thread.

▪ (1) 10 in (254 mm) diameter depressed side sump outlet with trash screen(s).

▪ 12 in (305mm) diameter hole and bolt circle(s) for equalization, One per cell.

▪ (1) 10 in (254mm) diameter Std Cased Face Bypass connection (sized for

100% of design flow).

▪ 4 in (102mm) diameter combination drain and overflow in each cell

▪ (1) 1 in (25.4mm) water make-up float valve.

o Distribution Basin Inlet and Accessories:

▪ (2) 10 in (254 mm) diameter top inlet connections per cell.

▪ (2) 10 in (254 mm) horizontal flow control valves per cell.

o Maintenance & Maintenance Access Features:

▪ All stainless steel is series 300.

▪ External lube line with dipstick

▪ Access door located on each end wall

▪ (1) Access door platform

▪ Stainless Steel (per SS Grade) plenum walkway in each cell

Attachment 3

FA301025R0009

02022025/Rev2

Attachment 3

02022025/Rev2

▪ Internal mechanical equipment access platform in each cell

▪ Easy fitting perimeter guardrail, kneerail & toeboard

▪ (1) Cased face ladder

▪ Ladders extended 60 inches below base of tower

▪ Easy fitting ladder safety cage(s)

▪ One davit per cell with hand winch

BASIC REQUIREMENTS & METHODS

▪ MECHANICAL EQUIPMENT: Major items of mechanical equipment shall be of the best quality used for the purpose in commercial practice, shall be the products of a reputable manufacturer, and shall be new. Equipment shall be installed in accordance with recommendations of the manufacturer and for this type of work.

o Best Quality: Equipment chosen shall represent the top tier in terms of quality and performance.

▪ Durability: The equipment shall be made to last, using materials and construction methods that resist wear and tear.

▪ Performance: The equipment shall operate at peak efficiency, providing optimal functionality for the intended use.

▪ Reliability: The equipment shall have a low failure rate under normal operating conditions.

▪ Safety: The equipment shall incorporate safety features to protect users and comply with all UFC, UFGS, local, state, and federal safety standards.

▪ Brand or Manufacturer Reputation: Equipment shall be sourced from manufacturers known for excellence in their respected field.

▪ Compliance with Standards: Adherence to industry standards, certifications, and regulatory requirements.

▪ PPROTECTION OF FIXTURES, MATERIALS & EQUIPMENT: Pipe openings shall be closed with caps or plugs during installation. Fixtures and equipment shall be tightly covered and protected against dirt, water, and chemical injury. At the completion of the work, the fixtures, materials and equipment shall be thoroughly cleaned, adjusted, tested and operated

▪ OPERATING INSTRUCTIONS: Contractor shall furnish operating instructions for every piece of equipment that is supplied together with three copies of the spare parts list.

Spare parts list to be neatly bound in folder, indexed, and labeled for each piece of equipment. Contractor shall provide typewritten instructions, easily read, explaining exactly the procedure to be followed in starting up, and in shutting down the systems for each of the various control cycles.

SECTION 23 65 00

COOLING TOWERS AND REMOTE EVAPORATIVELY-COOLED CONDENSERS

11/16, CHG 2: 08/18

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ACOUSTICAL SOCIETY OF AMERICA (ASA)

ASA S1.13 (2005; R 2010) Methods for the Measurement of Sound Pressure Levels in Air (ASA 118)

AIR-CONDITIONING, HEATING AND REFRIGERATION INSTITUTE (AHRI)

ANSI/AHRI 495 (2005) Performance Rating of Refrigerant Liquid Receivers

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING

ENGINEERS (ASHRAE)

ANSI/ASHRAE 15 & 34 (2022) ANSI/ASHRAE Standard 15-Safety Standard for Refrigeration Systems and ANSI/ASHRAE Standard 34-Designation and Safety Classification of Refrigerants

ASHRAE 64 (2020) Methods of Testing Remote Mechanical-Draft Evaporative Refrigerant Condensers

ASHRAE 90.1 (2022) Energy Standard for Sites and Buildings Except Low Rise Residential Buildings

AMERICAN WELDING SOCIETY (AWS)

AWS Z49.1 (2021) Safety in Welding and Cutting and Allied Processes

ASTM INTERNATIONAL (ASTM)

ASTM A48/A48M (2022) Standard Specification for Gray Iron Castings

ASTM A123/A123M (2024) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A153/A153M (2023) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A653/A653M (2023) Standard Specification for Steel

Attachment 3

Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by

Attachment 3 the Hot-Dip Process

ASTM B117 (2019) Standard Practice for Operating Salt Spray (Fog) Apparatus

ASTM D520 (2000; R 2011) Zinc Dust Pigment

ASTM D1784 (2020) Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated Poly(Vinyl Chloride) (CPVC) Compounds

ASTM D2996 (2017) Standard Specification for Filament-Wound "Fiberglass" (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe

ASTM E84 (2023) Standard Test Method for Surface Burning Characteristics of Building Materials

COOLING TECHNOLOGY INSTITUTE (CTI)

CTI ATC-105 (2000) Acceptance Test Code

CTI STD-111 (2018) Gear Speed Reducers for Application on Industrial Water Cooling Towers

CTI Std-201 (2011) Standard for the Certification of Water Cooling Tower Thermal Performance

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA MG 1 (2021) Motors and Generators

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2023) National Electrical Code

NFPA 214 (2021) Standard on Water-Cooling Towers

SOCIETY OF AUTOMOTIVE ENGINEERS INTERNATIONAL (SAE)

SAE J534 (2021) Lubrication Fittings

UL SOLUTIONS (UL)

UL 723 (2020) UL Standard for Safety Test for Surface Burning Characteristics of Building Materials

Attachment 3

1.2 SUBMITTALS

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are for Contractor Quality Control approval.

SD-03 Product Data

Cooling Towers; G

Demonstrations; G

Verification of Dimensions; G

Remote Evaporatively-Cooled Condensers

SD-06 Test Reports

Packaged Cooling Tower - Installation Instructions; G

Field-Erected Cooling Tower - Installation Instructions; G

Packaged Cooling Tower - Field Acceptance Test Plan; G

Field-Erected Cooling Tower - Field Acceptance Test Plan; G

Packaged Cooling Tower - Field Acceptance Test Report; G

Field-Erected Cooling Tower - Field Acceptance Test Report; G

SD-07 Certificates

Service Organization

Cooling Tower

Remote Evaporatively-Cooled Condensers

SD-08 Manufacturer's Instructions

Packaged Cooling Tower - Installation Instructions

Field-Erected Cooling Tower - Installation Instructions

Remote Evaporatively-Cooled Condensers

SD-10 Operation and Maintenance Data

Operation and Maintenance Manuals

Remote Evaporatively-Cooled Condensers

Attachment 3

1.3 SAFETY REQUIREMENTS

Exposed moving parts, parts that produce high operating temperature, parts which may be electrically energized, and parts that may be a hazard to operating personnel must be insulated, fully enclosed, guarded, or fitted with other types of safety devices. Safety devices must be installed so that proper operation of equipment is not impaired. Welding and cutting safety requirements must be in accordance with AWS Z49.1.

1.4 DELIVERY, STORAGE, AND HANDLING

Stored items must be protected from the weather, humidity and temperature variations, dirt and dust, or other contaminants. Proper protection and care of all material both before and during installation must be the Contractor's responsibility. Any materials found to be damaged must be replaced at the Contractor's expense. During installation, piping and similar openings must be capped to keep out dirt and other foreign matter.

1.5 PROJECT/SITE CONDITIONS

1.5.1 Verification of Dimensions

The Contractor must become familiar with all details of the work, verify all dimensions in the field, and advise the Contracting Officer of any discrepancy before performing any work.

PART 2 PRODUCTS

2.1 STANDARD COMMERCIAL PRODUCTS

Materials and equipment must be standard commercial catalogued products of a manufacturer regularly engaged in the manufacturing of such products, which are of a similar material, design and workmanship. The standard products (proposed models) must have been in satisfactory commercial or industrial use in field service for two years prior to bid opening. The two year use must include applications of equipment and materials under similar circumstances and of similar size. Products having less than a two year field service record will be acceptable if a certified record of satisfactory field operation, for not less than 6000 hours exclusive of the manufacturer's factory tests, can be shown. This 6000 hour record must not include any manufacturer's prototype or factory testing. Records of satisfactory field use must be completed by a product that had been, and presently is, sold, or offered for sale on a commercial market through the following copyrighted means: advertisements, manufacturer's catalogs, or brochures.

Products must be supported by a service organization. System components must be environmentally suitable for the indicated locations.

2.2 MANUFACTURER'S STANDARD NAMEPLATES

Major equipment including cooling towers, cooling tower gear drive assemblies, fans, and motors must have the manufacturer's name, address, type or style, model or serial number, and catalog number on a plate secured to the item of equipment. Plates must be durable and legible throughout equipment life. Plates must be fixed in prominent locations.

Attachment 3

2.3 ELECTRICAL WORK

a. Provide motors, controllers, integral disconnects, contactors, and controls with their respective pieces of equipment, except controllers indicated as part of motor control centers. Manual or automatic control and protective or signal devices required for the operation specified and control wiring required for controls and devices specified, but not shown, must be provided. For packaged equipment, the manufacturer must provide controllers including the required monitors and timed restart.

b. For polyphase motors, provide squirrel-cage medium induction motors, including motors that are part of a system, and that meet the efficiency ratings for premium efficiency motors in accordance with

NEMA MG 1.

c. Provide single-speed motor (s). Single-speed shall be 30 maximum, NEMA Premium Efficiency, TEFC, 1.15 service factor, inverter duty, variable torque, and specially insulated for cooling tower duty (Class F). Speed and electrical characteristics shall be 1800, single-winding, 3-phase, 60 Hz, 230/460 volts. Motor shall operate in the shaft-horizontal position for gear drive towers and shaft-down position for belt drive towers. Nameplate horsepower shall not be exceeded at design portion.

Provide motors in accordance with NEMA MG 1 and of sufficient size to drive the load at the specified capacity without exceeding the nameplate rating of the motor. Motors must be rated for continuous duty with the enclosure specified. Motor duty requirements must allow for maximum frequency start-stop operation and minimum encountered interval between start and stop. Motor torque must be capable of accelerating the connected load within 20 seconds with 80 percent of the rated voltage maintained at motor terminals during one starting period. Provide motor starters complete with thermal overload protection and other necessary appurtenances. Motor enclosure type may be TEFC.

2.4 COOLING TOWER MATERIALS

2.4.1 Stainless Steel Sheets

Except where otherwise specified, all components of the cooling tower shall be fabricated of series 301L stainless steel.

2.4.2 Hardware

All hardware must be Type 304 stainless steel with neoprene and cadmium-plated steel washer under the heads. Hardware must meet the salt-spray fog test as defined by ASTM B117. Angle brackets and similar parts must be zinc-coated steel. Zinc coatings must conform to ASTM A153/A153M and [ASTM A123/A123M], as applicable, and must have an extra heavy coating of not less than 2.35 ounces per square foot of surface. Subject hardware to a salt-spray fog test in accordance with ASTM B117. No signs of corrosion must be evident after 1,000 hours continuous exposure to a 5 percent salt spray.

Attachment 3

2.5 COOLING TOWERS

2.5.1 Factory Assembled Towers

2.5.1.1 Description

Provide an induced draft, crossflow type, factory assembled, film fill, industrial duty, stainless steel cooling tower situated as shown on the plans. The limiting overall dimensions of the tower shall be 22.42 wide,

13.90 long, and 11.98 high. Total operating power of all fans shall not exceed 30, consisting of 1 @ 30 motor(s). Tower shall be similar and equal in all respects to Marley Model NC8409SAN or approved equal.

The cooling tower must include frames and casings, louvers, drift eliminators, partitions, windbreak baffles, drift-check walls, cold water basin equipment, fans and fan walls, blowers, drives, electric motors, access doors, working platforms, inspection plates, and panels.

2.5.1.2 Construction

Tower must be constructed to withstand a wind pressure of not less than 30 psf on any external surface. Fan deck must be constructed to withstand a live load of not less than 60 psf in addition to the concentrated or distributed loads of equipment mounted on the fan deck.

Except where otherwise specified, all components of the cooling tower shall be fabricated of series 301L stainless steel. The tower shall be capable of withstanding water having ca chloride content (NaCl)up to 750 ppm; a sulfate content (SO4) up to 1200 ppm; a calcium content (CaCO3) up to 800 ppm; and silica (SiO2) up to 150 ppm. The circulating water shall contain no oil, grease, fatty acids, or organic solvents.

Fiberglass casing, polyurethane barriers, and thermosetting hybrids and the components they are adhered to shall be considered nonrecyclable and not allowed.

The specifications, as written, are intended to indicate those materials that will be capable of withstanding the above water quality in continuing service. 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 materials of manufacture.

The hot water distribution system must be of the open basin gravity feed type or the pressurized spray header type design. Two open stainless steel basins (one above each bank of fill) shall receive hot water piped to each cell of the tower. These basin components shall be installed and sealed at the factory and assembled with bolted connections. Tap screws shall not be allowed due to their potential to develop leaks. The basins shall be equipped with removable, stainless steel covers capable of withstanding the loads described in paragraph 4.1. The water distribution system shall be accessible and maintainable during tower fan and water operation.

Each basin shall include an inlet hole and bolt circle to accept a 125# flange connection per ANSI B16.1. Removable, interchangeable polypropylene nozzles installed in the floor of these basins shall provide full coverage of the fill by gravity flow.

The water distribution system shall be accessible and maintainable while tower is operating.

Attachment 3

2.5.1.3 Tower Frame and Louvers

Provide frame constructed from 301L stainless steel. Intermediate structural members must be provided for rigidity and support of casings, louvers, fill, distribution systems, fan decks, and other equipment. Inlet air louvers must permit free air passage but no splash out and must be designed to prevent debris and sunlight from entering the cold water basin.

2.5.1.4 Fill

The fill must support expected loads without sag or failure and arranged to effectively break up the water. The fill must be manufactured and performance tested by the cooling tower manufacturer. The fill must be of the materials as specified. Polyvinyl chloride (PVC) fill is suitable for inlet temperatures to 125 degrees F on cross flow type units and temperatures to 130 degrees F on counterflow type units. Chlorinated polyvinyl chloride (CPVC) fill must be used for applications where inlet temperatures are greater than 130 degrees F. Fill must be in accordance with ASTM E84, Class A.

Fill shall be film type, thermoformed of PVC, with louvers and eliminators formed as part of each fill sheet. Fill shall be suspended from stainless steel structural tubing supported from the tower structure and shall be elevated above the floor of the cold-water basin to facilitate cleaning.

Air inlet faces of the tower shall be free of water splash out.

2.5.1.5 Drift Eliminators

Provide drift eliminator sections designed and arranged to effectively trap water droplets entrained in the discharge airstream. Sections must be assembled in easily removable sections for counterflow induced mechanical draft tower. Drift eliminators must be constructed of Polyvinyl chloride (PVC), triple-pass, in accordance with ASTM E84, Class A and shall limit drift losses to 0.005% or less of the design water flow rate.

2.5.1.6 Cold Water Basin Equipment.

The collection basin shall be welded 301L stainless steel construction.

Only low-carbon stainless steel alloys will be accepted in order to minimize the risk of intergranular corrosion in the weld zones. The basin shall include the number and type of suction connections required to accommodate the existing outflow piping system. Suction connections shall be equipped with stainless steel debris screens. An overflow and rain connection shall be provided in each cell of the cooling tower. The basin floor shall slope toward the drain to allow complete flush out of debris and silt that may accumulate. Towers of more than one cell shall include a method for flow and equalization between cells. The basin shall be accessible and maintainable while water is circulating. All steel items that project into the basin shall also be made of stainless steel.

Include Type 301L stainless steel sump with stainless steel removable screen and vortex breaker, float valves, and necessary pipe connections and fittings within the tower. Provide float valves with adjustable arms.

Valve sizes larger than 1/2 inch pipe size must be the balanced piston type. Valve seats and disks must be replaceable.

Provide cold water basins and casings suitably sealed and flashed at joints and connections to ensure watertight construction.

Attachment 3

2.5.1.7 Fans, Blowers, and Drives.

The towers must have axial propeller-type fans having not less than four aluminum alloy or glass-reinforced polypropylene blades or squirrel-cage, centrifugal-type blowers, as applicable. Fans and blowers must be designed and constructed to withstand 50 percent overspeed above normal maximum operating speeds.

Fan(s) shall be propeller-type, incorporating aluminum alloy blades attached to galvanized hubs with U-bolts. Blades shall be individually adjustable. Maximum fan tip speed shall be 13,000 ft/min. Fan(s) shall be driven through a right angle, industrial duty, oil lubricated, geared speed reducer that requires no oil changes for the first five (5) years of operation. The gear assemblies must be enclosed in an oil filled housing provided with fill and drain plugs.

All gearbox bearings shall be rated at an L10A service life of 100,000 hours or greater and the gear sets shall have AGMA Quality Class of 9 or greater. The gearbox shall include any modifications to enable operation down to 10% of full speed.

The motor shall be mounted outside the casing of the tower and shall be connected to the gear reducer by a dynamically balanced, stainless steel tube and flange driveshaft. The motor to gearbox close coupling shall be a tire-type, single piece, flexible element design to accommodate frequent speed changes that are inherent with VFD applications.

2.5.1.8 Tower Piping

Piping must be schedule 40 PVC and conform to ASTM D2996. Fittings for other piping materials must be of the same material or equal and of the same class and grade as the pipe.

2.5.1.9 Electric Motors

Requirements are specified in paragraph ELECTRICAL WORK.

2.5.1.10 Vibration Cutout Switch.

Provide a mechanical vibration cutout switch or an electronic vibration cutout switch with auxiliary contacts in a protected position and most effective location, interlocked with the fan wiring to electrically open the motor circuit under excessive fan vibration.

2.5.1.11 Performance

The factory assembled tower must have Cooling Tower Institute certification that, in accordance with CTI Std-201, the cooling tower will perform thermally at the rating published by the tower manufacturer in his copyrighted literature.

2.5.1.12 Sound Power Level

Sound power levels, in decibels (dB)with a reference pressure of 0.0002 microbars, of the cooling tower must be not greater than the maximum permitted dB levels for the designated octave band as set forth in Table I or Table II. The sound power level data for the cooling tower must have been verified in tests conducted in accordance with ASA S1.13.

Attachment 3

ASTM B117.

Table I. Sound Power Level For Induced Mechanical Draft Type

Octave Band (Hz)

63 125 250 500 1000 2000 4000 8000

Sound Power Level (dB)

112 112 110 108 102 98 93 90

Table II. Sound Power Level For Forced Mechanical Draft Type

Octave Band (Hz)

63 125 250 500 1000 2000 4000 8000

Sound Power Level (dB)

112 112 110 108 102 98 93 90

2.5.1.13 Drift Loss

Drift loss must be not greater than 0.005 percent of the water circulated.

2.5.2 Lubrication

The lubricating points must be extended to the outside of the unit for easy accessibility. Hydraulic lubrication fittings must be in accordance with SAE J534. Where use of high pressure lubricating equipment, 1000 psi or higher, will damage grease seals or other parts, a suitable warning must be affixed to the equipment in a conspicuous location.

2.5.3 Factory Finish System

Galvanized metal must have been proven to withstand 125 hours in a salt-spray fog test, except that equipment located outdoors must withstand 500 hours in a salt-spray fog test. Equipment located in a seacoast environment must withstand 3,000 hours in a salt-spray fog test. For salt-spray fog test, the acceptance criteria must be as follows: immediately after completion of the test, the paint must show no signs of blistering, wrinkling, or cracking, and no loss of adhesion; and the specimen must show no signs of rust creepage beyond 0.125 inch on either side of the scratch mark.

The film thickness of the factory painting system applied on the equipment must not be less than the film thickness used on the test specimen. If manufacturer's standard factory painting system is being proposed for use on surfaces subject to temperatures above 120 degrees F, the factory painting system must be designed for the temperature service and must have been proven to pass the specified salt-spray test.

Attachment 3

2.5.4 Drift Eliminators

Eliminators must be provided in the tower outlet to limit drift loss to not over [0.005] percent of the circulating water rate.

Eliminators must be constructed of polyvinyl chloride (PVC).

Eliminators sections must be supported on PVC or FRP tee sections.

Tee sections must be suspended with 1/4 inch brass rods connected to stainless steel clips embedded in the bottom side of the roof deck at the time of casting. Stainless steel clips must be supplied by cooling tower manufacturer for installation by Contractor at time of roof deck pour. Eliminators may be supported by brass or stainless steel suspension rods from the fan deck or supported directly on concrete beams.]

2.5.5 Cold Water Basin Equipment.

Include sump with removable screen and vortex breaker, float valves, and necessary pipe connections and fittings within the tower. Provide float valves with adjustable arms. Valve sizes larger than 1/2 inch pipe size must be the balanced piston type. Valve seats and disks must be replaceable.

Provide cold water basins and casings suitably sealed and flashed at joints and connections to ensure watertight construction.

2.5.6 Fill (Heat Transfer Surface)

Tower fill must be the film type. Fill material must be free to expand or contract without warping or cracking. No plasticized wood cellulose must be provided for fill material. Fill must be removable or otherwise made accessible for cleaning. Space supports must be corrosion resistant and must prevent warping, sagging, misalignment, or vibration of the fill material. Fill material and supports must be designed to provide for an even mixing of air and water. Fill material must be constructed of thermoformed PVC sheets in a pattern, and of sufficient height to meet the performance specifications. Fill shall be suspended from stainless steel structural tubing supported from the tower structure and shall be elevated above the floor of the cold-water basin to facilitate cleaning. Air inlet faces of the tower shall be free of water splash out. Lintels must be designed with a safety factor of 2 minimum.

2.5.7 Fire Safety

Towers must conform to NFPA 214. Fire hazard rating for plastic impregnated materials must not exceed 25. Plastics must not drip or run during combustion. Fire hazard ratings must be in accordance with ASTM E84, Class A and UL 723.

2.5.8 Meters and Controls

Tower must be provided with makeup and blowdown meters, conductivity controller, and overflow alarm.

Attachment 3

] 2.6 FABRICATION

Equipment and component items, must have been proven to withstand 125 hours in a salt-spray fog test, except that equipment located outdoors must withstand 500 hours in a salt-spray fog test. Equipment located in a sea coast environment must withstand 3,000 hours in a salt-spray fog test.

Salt-spray fog test must be in accordance with ASTM B117. Cut edges of galvanized surfaces where hot-dip galvanized sheet steel is used must be coated with a zinc-rich coating conforming to ASTM D520, Type I.

2.7 SUPPLEMENTAL COMPONENTS/SERVICES

2.7.1 Temperature Controls

Cooling towers must be fully coordinated with and integrated into the existing air-conditioning system.

PART 3 EXECUTION

3.1 DEMONSTRATIONS

Contractor must conduct a training course for the operating staff as designated by the Contracting Officer. The training period must consist of a total hours of normal working time and start after the system is functionally completed but prior to final acceptance tests. The training course must cover all of the items contained in the approved Operation and Maintenance Manuals as well as demonstrations of routine maintenance operations.

Provide a schedule, at least 2 weeks prior to the date of the proposed training course, which identifies the date, time, and location for the training.

3.2 INSTALLATION

Installation of cooling tower systems including materials, installation, workmanship, fabrication, assembly, erection, examination, inspection, and testing must be in accordance with NFPA 70, and in compliance with the manufacturer's written installation instructions, including the following:

(1) Packaged cooling tower - installation instructions

3.2.1 Installation Instructions

Provide manufacturer's standard catalog data, at least 2 weeks prior to the purchase or installation of a particular component, highlighted to show features such as materials of construction, dimensions, options,performance and efficiency. Data must include manufacturer's recommended installation instructions and procedures. Data must be adequate to demonstrate compliance with contract requirements.

3.2.2 Vibration Isolation

Vibration isolator literature must be included containing catalog cuts and certification that the isolation characteristics of the isolators provided meet the manufacturer's recommendations.

Attachment 3

3.2.3 Verification of Dimensions

Provide a letter including the date the site was visited, conformation of existing conditions, and any discrepancies found.

3.2.4 Demonstrations

Provide a schedule, at least 2 weeks prior to the date of the proposed training course, which identifies the date, time, and location for the training.

3.2.5 Certificates

Where the system, components, or equipment are specified to comply with requirements of AGA, NFPA, ARI, ASHRAE, ASME, or UL, proof of such compliance must be provided. The label or listing of the specified agency must be acceptable evidence. In lieu of the label or listing, a written certificate from an approved, nationally recognized testing organization equipped to perform such services, stating that the items have been tested and conform to the requirements and testing methods of the specified agency may be submitted. When performance requirements of this project's drawings and specifications vary from standard ARI rating conditions, computer printouts, catalog, or other application data certified by ARI or a nationally recognized laboratory as described above must be included. If ARI does not have a current certification program that encompasses such application data, the manufacturer may self certify that his application data complies with project performance requirements in accordance with the specified test standards.

3.2.6 Operation and Maintenance Manuals

Provide Three (3) complete copies of an operation manual in bound 8 1/2 by 11 inch booklets listing step-by-step procedures required for system startup, operation, abnormal shutdown, emergency shutdown, and normal shutdown at least weeks prior to the first training course. The booklets must include the manufacturer's name, model number, and parts list. The manuals must include the manufacturer's name, model number, service manual, and a brief description of all equipment and their basic operating features. Six complete copies of maintenance manual in bound 8 1/2 by 11 inch booklets listing routine maintenance procedures, possible breakdowns and repairs, and a trouble shooting guide. The manuals must include piping and equipment layouts and simplified wiring and control diagrams of the system as installed.

3.2.7 Connections to Existing Systems

Notify the Contracting Officer in writing at least 15 calendar days prior to the date the connections are required. Obtain approval before interrupting service. Furnish materials required to make connections into existing systems and perform excavating, backfilling, compacting, and other incidental labor as required. Furnish labor and tools for making actual connections to existing systems.

3.3 TESTING

a. Each cooling tower system must be field acceptance tested in compliance with its approved field acceptance test plan and the resulting following field acceptance test report submitted for approval:

(1) Packaged cooling tower - field acceptance test report

Attachment 3

b. Manufacturer's recommended testing: Conduct the manufacturer's recommend field testing in compliance with the approved test plan.

Furnish a factory trained field representative authorized by and to represent the equipment manufacturer at the complete execution of the field acceptance testing.

c. Operational test: Conduct a continuous 24 hour operational test for each item of equipment. Equipment shutdown before the test period is completed must result in the test period being started again and run for the required duration. For the duration of the test period, compile an operational log of each item of equipment. Log required entries every two hours. Use the test report forms for logging the operational variables.

d. Notice of tests: Conduct the manufacturer's recommended tests and the operational tests; record the required data using the approved reporting forms. Notify the Contracting Officer in writing at least 15 calendar days prior to the testing. Within 5 calendar days after acceptable completion of testing, submit each test report for review and approval.

e. Report forms: Type data entries and writing on the test report forms.

Completed test report forms for each item of equipment must be reviewed, approved, and signed by the Contractor's test director. The manufacturer's field test representative must review, approve, and sign the report of the manufacturer's recommended test. Signatures must be accompanied by the person's name typed.

f. Deficiency resolution: The test requirements acceptably met;

deficiencies identified during the tests must be corrected in compliance with the manufacturer's recommendations and corrections retested in order to verify compliance.

g. Towers with thermal performance not CTI certified to CTI Std-201 must have their thermal performance verified by field testing that meets the requirements of CTI ATC-105.

Part 4 Thermal Performance

Ther tower shall be capable of cooling 1500 gpms of water from 95 to 85 at a design entering air wet-buld temperature of 80, and its thermal rating shall be Certified by the Cooling Technology Institute. The tower shall be capable of a minimum Tru efficiency per ASHRAE Std 90.1.

CTI Certification notwithstanding, the cooling tower manufacturer shall guarantee that the tower supplied will meet the specified performance conditions when the tower is installed according to plan. If, because of a suspected 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 agreeable to the owner to compensate for the performance deficiency.

-- End of Section --

Attachment 3