SECTION 15730

LIQUID COOLERS

PART 1 GENERAL

SECTION INCLUDES

Liquid cooler.

Controls.

Ladder and handrails.

Circulating pump.

Sound attenuators.

Discharge hood.

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 15785 - Computer Room Air Conditioning Units.

Section 15952 - Controls and Instrumentation.

Section 15990 - Testing, Adjusting, and Balancing.

Section 16180 - Equipment Wiring Systems.

Section 16622 - Packaged Engine Generator Set.

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 E84 - Surface Burning Characteristics of Building Materials.

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

CTI (Cooling Tower Institute) 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 certificate under provisions of Section [01400] [01405] that [products] [_____] meet or exceed [specified requirements.] [____________________.]

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.]

Include cleaning methods and cleaning materials recommended.

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 [liquid cooler package] [fan drive.] [motor.] [pan, casing and cooler coil.] [labor.] [and] [materials.] [only.]

EXTRA MATERIALS

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

Provide one set of matched fan belts, [twelve] [_____] spray nozzles, one spare gasket for each access door, one valve seat for each make-up valve, one strainer screen, one float, one pump seal, and one set of pump gaskets, 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] [indoor] use, factory assembled, sectional, counterflow, vertical discharge, blow thru design, with fan assemblies built into pan and casing.

Provide [_____] liquid coolers 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, and with pump circulating [_____] gpm ([_____] L/sec) with [_____] hp ([_____] kW] motor. Design to operate against [_____] inch wg ([_____] Pa) external static pressure with [_____] motors at [_____] hp ([_____] W).

COMPONENTS

Pan and Casing: Galvanized steel, [12 gage (2.5 mm)] [14 gage (1.8 mm)] for casing and 8 gage (4.0 mm) for reinforcing angles and channels with access doors at both ends of cooler to air plenum, lift out steel strainer, bleed line (from pump discharge) with valve [, inlet and outlet silencers] [, discharge hood with access doors ] [, duct flanges on inlet and outlet.]

Cooler Coil: Steel tubing, air tested under water to 350 psig (2420 kPa), sloped to ensure drainage, encased in steel framework. [Provide cleanable [header] [tube] unit with removable cover plates on header to access tubular coil.]

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 expectancy at 30,000 hours, with extended grease fittings.

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

V-Belt Drive: Cast iron or steel sheaves, dynamically balanced, keyed. Variable and adjustable pitch sheave for motors 15 hp (11.2 kW) and under, selected so required rpm is obtained with sheaves set at mid-position. Fixed sheave for 20 hp (15kW) and over, matched belts. Drive rated minimum 1.5 times nameplate rating of motor.

Fan Guard: Removable, welded steel rod and wire guard.

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 flame spread rating of [5] [10] to ASTM E-84.

Drift Eliminators: Two or three pass formed steel, minimum 24 gage (0.6 mm), to limit drift loss 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 washer head fasteners.]

Finish of steel components: G210 hot dipped galvanized

steel with zinc chromatized aluminum paint.

Pump: Close coupled, bronze fitted, centrifugal pump with mechanical seal, mounted on piping [controlled by pan mounted immersion thermostat set at [140 degrees F (60 degrees C)] [180 degrees F (82 degrees C)].]

Pump motor: [Single] [Two] speed [(1800/900 rpm)] open drip proof mounted on pump body. [Refer to Section 15170.]

ACCESSORIES

Electric Immersion Heaters: In pan suitable to maintain temperature of water in basin at 42 degrees F (5 degrees when outside temperature is 0 degrees F (-17 degrees C) and wind velocity is 15 mph (25 kph); immersion thermostat and float control to operate heaters on low temperature when pan is filled.

Electric Temperature Controller: In pan, set at [140 degrees F (60 degrees C)] [180 degrees F (82 degrees C)]; with sensor to cycle fans.

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

Capacity Control: Consists of scroll damper and modulating electronic damper motor controlled by temperature controller; sensor in pan set at [140 degrees F (60 degrees C).] [180 degrees F (82 degrees C).]

FACTORY FINISHING

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

PART 3 EXECUTION

EXAMINATION

Verify that openings are ready to receive work.

Verify field measurements are as shown on Drawings.

Verify that required utilities are available, in proper location, and ready to use.

Beginning of installation means installer accepts existing conditions.

INSTALLATION

Install in accordance with manufacturer's instructions.

Install cooler on structural steel beams as instructed by manufacturer.

Install cooler on vibration isolators. Refer to Section 15242.

Connect cooler water piping with flanged connections to cooler. Refer to Section 15510.

Connect make-up water piping with flanged or union connections to cooler. Pitch to cooler. Pipe drain, overflow drain, and bleed line to nearest floor drain. Refer to Section 15410.

INTERFACE WITH OTHER PRODUCTS

Ensure capacities are adequate for [Computer Room Air Conditioning Units.] [Packaged Engine Generator Set.] Refer to [Section 15785.] [Section 16622.]

MANUFACTURER'S FIELD SERVICES

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

Inspect cooler after installation and submit report prior to start-up, verifying installation is in accordance with specifications and manufacturer's recommendations.

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

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

ADJUSTING

Adjust work under provisions of Section [01650.] [01660.]

Adjust water level float valves and float controls for proper operating level.

Adjust bleed valve for proportion of circulated water.

Adjust temperature controls and verify operation.

DEMONSTRATION

Provide systems demonstration under provisions of Section [01670.] [_____.]

Provide operation test to demonstrate operation in accordance with specified requirements. Refer to Section 15990.

SCHEDULE

Drawing_Code LC-1 LC-2 LC-3	Location

Manufacturer

Model Number

Cooler Section

Cooler Liquid

Cooling Capacity

Liquid Flow Rate

Entering Liquid Temperature

Leaving Liquid Temperature

Evaporative Section

Entering Air WB Temperature

External Static Pressure

Number of Fan Motors

Fan Motor Size

Pump Flow Rate

Pump Motor Size

Pan Heaters No. and Type

END OF SECTION