SECTION 15714

BLOW THRU COOLING TOWER

PART 1 GENERAL

SECTION INCLUDES

Cooling tower.

Controls.

Ladder and handrails.

RELATED SECTIONS

Section 15170 - Motors

Section 15242 - Vibration Isolation.

Section 15510 - Hydronic Piping.

Section 15540 - HVAC Pumps.

Section 15681 - Reciprocating Water Chillers.

Section 15684 - Centrifugal Water Chillers.

Section 15686 - Absorption Water Chillers.

Section 15952 - Controls and Instrumentation.

Section 16180 - Equipment Wiring Systems.

REFERENCES

ANSI/AFBMA 9 - Load Ratings and Fatigue Life for Ball Bearings.

ANSI/AFBMA 11 - Load Ratings and Fatigue Life for Roller Bearings.

ASME PTC-23 - Atmospheric Water-Cooling Equipment.

ASTM E-84 - Test Method for Surface Burning Characteristics of Building Materials.

Cooling Tower Institute (CTI) ATC-105 - Acceptance Test Code for Water Cooling Towers.

Cooling Tower Institute (CTI) STD-201 Certification Standard.

SUBMITTALS

Submit shop drawings under provisions of Section [01300.] [01340.]

Submit shop drawings indicating suggested structural steel supports including dimensions, sizes, and locations for mounting bolt holes.

Submit product data under provisions of Section [01300.] [01340.]

Submit product data indicating rated capacities, dimensions, weights and point loadings, accessories, required clearances, electrical requirements and wiring diagrams, and location and size of field connections. Submit schematic indicating capacity controls.

Certify performance, based on [CTI ATC-105] [CTI STD-201] [or] [ASME PTC-23] and submit performance curve plotting leaving water temperature against wet bulb temperature.

Submit manufacturer's installation instructions under provisions of Section [01300.] [01340.]

OPERATION AND MAINTENANCE DATA

Submit operation data under provisions of Section [01700.] [01730.]

Include start-up instructions, maintenance data, parts lists, controls, and accessories.

Submit maintenance data under provisions of Section [01700.] [01730.]

DELIVERY, STORAGE, AND HANDLING

Deliver products to site under provisions of Section [01600.] [01610.]

Factory assemble entire unit. For shipping, disassemble into as large as practical sub-assemblies so that minimum amount of field work is required for re-assembly.

Store and protect products under provisions of Section [01600.] [01620.]

Comply with manufacturer's installation instructions for rigging, unloading, and transporting units.

WARRANTY

Provide [five] [_____] year warranty under provisions of Section [01700.] [01740.]

Warranty: Include coverage for [cooling tower package.] [fan drive.] [motor.] [labor.] [and] [materials.] [only.]

EXTRA MATERIALS

Submit maintenance materials under provisions of Section [01700.] [01750.]

Provide one set of matched fan belts, three spray nozzles for each cell, one spare gasket for each access door, one valve seat for each make-up or control valve under provisions of Section [01700.] [01750.]

PART 2 PRODUCTS

MANUFACTURERS

[__________________________________] Product [__________.]

[__________________________________] Product [__________.]

[__________________________________] Product [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

MANUFACTURED UNITS

Provide units for outdoor use, factory assembled, sectional, counterflow, vertical discharge, blow thru design, with fan assemblies built into pan and casing.

Provide [_____] cooling towers having capacity to cool [_____] gpm ([_____] L/sec) of water from [_____] degrees F ([_____] degrees C) to [_____] degrees F ([_____] degrees C), with [_____] degrees F ([______] degrees C) entering air WB temperature. Design to operate against [_____] inch wg ([_____] Pa) external static pressure with [_____] motors at [_____] hp ([_____] W).

COMPONENTS

Pan and Casing: Galvanized steel, [12 gage (_____mm)] [14 gage (_____mm)] for casing and 8 gage (_____mm) for reinforcing angles and channels with access doors at both ends of tower to air plenum.

Fans: [Multi blade, cast aluminum, axial type] [Forward curved centrifugal type mounted on steel shaft], with belt drive, bearings with ANSI/AFBMA 9 or ANSI/AFBMA 11 L-10 life at 30,000 hours, with extended grease fittings.

Motor: [Single] [Two] speed [(1800/900 rpm)] mounted on adjustable steel base. [Refer to Section 15170.]

Belt Drive: Designed for minimum 150 percent motor nameplate power.

Fan Guard: Welded steel rod and wire guard, hot dipped galvanized after fabrication.

Distribution Section: [Polyvinyl chloride] [Galvanized steel] piping header and branches with [ABS] plastic spray nozzles.

Fill: Wave formed sheets of polyvinyl chloride plastic, self extinguishing with ASTM E-84 flame spread rating of [5] [10].

Drift Eliminators: Two or three pass hot dipped galvanized steel , drift loss limited to [0.7] [0.2] percent of total water circulated.

Float Valves: Brass or bronze [balanced piston type] make-up valve with plastic or copper float.

Hardware: Galvanized steel nuts, bolts, and washers, stainless steel 0.25 inch (7 mm) nuts, bolts, washers, and nails[.] [; assemble with phenolic epoxy coated, cadmium plated washerhead fasteners.]

Finish of steel components: G210 hot dipped galvanized steel with zinc chromatized aluminum paint.

ACCESSORIES

Electric Immersion Heaters: In pan suitable to maintain temperature of water in pan at 42 degrees F (5 degrees C) when outside temperature is 0 degrees F (-17 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.

Electric Temperature Controller: In pan; with sensor to cycle fans.

Time Delay Relay: Limits fan motor starts to not more than six per hour.

Capacity Control: For stable operation down to 10 percent of rated cooling at specified wet bulb temperature.

Capacity Control with Scroll Damper and Modulating Electronic Damper Motor: controlled by temperature controller, sensor in pan.

PART 3 EXECUTION

INSTALLATION

Install in accordance with manufacturer's instructions.

Install tower on structural steel beams as instructed by manufacturer.

Elevate tower to maintain maximum positive suction head on

condenser water pump.

Install tower on vibration isolators. Refer to Section 15242.

Connect condenser water piping with flanged connections to tower. Pitch condenser water supply to tower and condenser water suction away from tower. Refer to Section 15510.

Connect make-up water piping with flanged or union connections to tower. Pitch to tower . Refer to Section 15410.

Connect overflow, bleed, and drain, to [floor drain.] [storm sewer.] [__________.]

FIELD QUALITY CONTROL

Field [inspection and] testing will be performed under provisions of Section [01400.] [01410.]

Test under actual operating conditions [to CTI ATC-105] and verify specified performance.

MANUFACTURER'S FIELD SERVICES

Prepare and start systems under provisions of Section [01600.] [01650.]

Inspect tower after installation and submit report prior to start-up, verifying installation is in accordance with specifications and manufacturers recommendations.

Supervise rigging, hoisting, and installation; include [_____] eight hour days per tower.

Allow [_____] eight hour days per tower for start-up and instruction of Owners operating personnel.

SCHEDULE

Drawing_Code CT-1 CT-2 CT-3	Location

Manufacturer

Model Number

Cooling Capacity

Water Flow Rate

Entering Water Temperature

Leaving Water Temperature

Entering Air WB Temperature

External Static Pressure

Number of Fan Motors

Motor Size

Heaters No. and Type

END OF SECTION