SECTION 15716

EJECTOR COOLING TOWER

PART 1 GENERAL

SECTION INCLUDES

Cooling Tower.

Accessories.

RELATED SECTIONS

Section 15242 - Vibration Isolation

Section 15510 - Hydronic Piping.

Section 15520 - Steam and Steam Condensate 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 15990 - Testing, Adjusting and Balancing.

Section 16180 - Equipment Wiring Systems.

REFERENCES

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

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

ASME PTC-23 - Atmospheric Water-Cooling Equipment.

ASTM A90 - Weight of Coating on Zinc-Coated (Galvanized) Iron or Steel Articles.

ASTM A525 - General Requirements for Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process.

ASTM A527 - Steel Sheet, Zinc-Coated (Galvanized) by Hot-Dip Process, Lock Forming Quality.

PERFORMANCE REQUIREMENTS

This unit is part of a system which includes pumps (Section 15540) and a [reciprocating] [centrifugal] [absorption] water chiller Section [15681] [15684] [15686]. When alternate equipment is selected, adjust performance of system components as required.

SUBMITTALS

Submit under provisions of Section [01300.] [_____.]

Shop Drawings: Indicate suggested structural steel supports including dimensions, sizes, and locations for mounting bolt holes.

Product Data: Provide data on rated capacities, dimensions, weights and point loadings, accessories, required clearances, electrical requirements and wiring diagrams, location and size of field connections, schematic indicating capacity controls, sound power levels.

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.

Manufacturer's Installation Instructions: Indicate rigging and installation instructions.

OPERATION AND MAINTENANCE DATA

Submit under provisions of Section [01700.] [_____.]

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

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing the products specified in this Section with minimum [three] [_____] years [documented] experience.

DELIVERY, STORAGE, AND HANDLING

Deliver, store, protect and handle products under provisions of Section [01600.] [_____.]

Factory assemble entire unit. Comply with manufacturer's installation instructions for rigging, unloading, and transporting units.

WARRANTY

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

Warranty: Include coverage for [entire cooling tower.] [__________.]

EXTRA MATERIALS

Furnish under provisions of Section [01700.] [_____.]

Provide the following:

[ten] [___] spray nozzles

[one] [___] spare gasket for each access door

[one] [___] valve seat for each make-up or control valve

[one] [___] water distribution strainer screen and gasket

[one] [___] float valve

PART 2 PRODUCTS

MANUFACTURERS

[_______________________________] Product [_________.]

[_______________________________] Product [_________.]

[_______________________________] Product [_________.]

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

MANUFACTURED UNITS

Description: Outdoor use, factory assembled, sectional, parallel flow, blow thru design, with air introduced into and through tower by water injection process.

Performance:

Capacity Cool [___] gpm ([___] L/sec) of water from [___] degrees F ([___] degrees C) to [___] degrees F ([___] degrees C).

Entering air WB temperature: [___] degrees F ([___] degrees C).

Pumping Head: [___] ft ([___] kPa).

Sound Power Level: [___] db.

Overall Size: [___] inches ([___] mm) length, [___] inches ([___] mm) depth, [___] inches ([___] mm) height.

Empty Weight: [___] lb ([___] kg).

Operating Weight: [___] lb ([___] kg).

Model: [______________] manufactured by [_______________.]

COMPONENTS

Water Distribution System: Hot-dip galvanized steel spray tree with ASTM A90, [G90] [G150] coating, composed of header with built-in strainer, branches with provision for clean-out, and brass spray nozzles; accessible from front of unit for inspection and servicing.

Pan Section [ASTM A525] or [ASTM A527] hot-dip galvanized steel, with ASTM A90, [G90] [G150] coating, finished inside and out with zinc chromatized aluminum paint, depressed center sump and connection for clean out and draining, anti-vortexing device and easily removable hot-dip galvanized steel strainer screens.

Casing Section: [ASTM A525] or [ASTM A527] hot-dip galvanized steel, with ASTM A90, [G90] [G150] coating, finished inside and out with zinc chromatized aluminum paint, and large [diameter, circular] access doors.

Inlet Air Stablizers: Insure smooth, non-turbulent, eddy-free flow of air into unit, regardless of wind direction; removable in sections.

Eliminators: 20 mils (0.5 mm) thick[.] [poly-vinyl chloride (PVC).]

Discharge Louvers: Hot-dip galvanized steel finished with zinc chromatized aluminum paint, to direct leaving air stream up.

Strainer System: Double filtration system consisting of:

Pan Sump: Large area, removable, hot-dip galvanized steel strainer screens with perforated openings.

Water Distribution Header: Large area, removable, hot-dip galvanized steel cylindrical strainer with perforations smaller than spray nozzle orifices and blow-down connection at bottom of header/strainer assembly.

Corrosion Protection: Steel components hot-dip galvanized with cut edges or other exposed surfaces coated with zinc rich compound. Apply final coating of zinc chromatized aluminum paint after assembly.

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

Hardware: Nuts, bolts, and washers shall be galvanized steel. Nuts, bolts, and washers 0.25 inch (7 mm) and larger, and nails shall be stainless steel. [Assemble with phenolic epoxy coated, cadmium plated washerhead fasteners.]

ACCESSORIES

Electric Immersion Heaters: Factory installed in pan with capacity to maintain temperature of water in pan at 40 degrees F (4.5 degrees C) when outside temperature is [0] [___] degrees F ([minus 17] [___] degrees C) [and wind velocity is 15 mph (25 kph),] with immersion thermostat and low water level control.

****** [OR] ******

Steam Heaters: Galvanized steel pipe coil, factory installed in pan with capacity to maintain temperature of water in pan at 40 degrees F (4.5 degrees C) when outside temperature is [0] [___] degrees F ([minus 17] [___] degrees C)[.] [and wind velocity is 15 mph (25 kph).]

Electric Water Level Control: Magnetic type float switch in moisture proof housing, controlling solenoid valve [for [___] gpm ([___] L/sec) water flow with [___] ft [___] kPa) pressure drop] with watertight housing, located in make-up line.

Pressure Gages: Factory mounted, four and one-half inch (115 mm) diameter dials with range of 0 to 100 psig (690 kPa), with brass shut-off valves mounted on water inlet connection and spray header assembly.

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 in vibration isolators. Refer to Section 15242.

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

Connect water make-up piping with flanged or union connections to tower. Pitch to tower. Provide valved bypass and hose bibb inside tower. [Provide water meter on make-up piping to tower.]

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

Connect electric controls, solenoid valves, [immersion heaters,] and float switches to power source. Refer to [Section 15952.] [Section 16180.]

Connect steam heater to steam and steam condensate piping systems. Refer to Section 15520.

FIELD QUALITY CONTROL

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

Test under actual operating conditions [to CTI ATC-105] and verify specified performance. [Refer to Section 15990.]

MANUFACTURER'S FIELD SERVICES

Prepare and start systems under provisions of Section [01400.] [_____.]

Inspect tower 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 tower.

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

ADJUSTING

Adjust Work under provisions of Section [01700.] [_____.]

Adjust water level control to recommended operating level.

Adjust bleed valve to [recommended volume.] [[___] percent fraction of circulating water.]

Adjust temperature controls and verify operation.

SCHEDULES

Drawing_Code	CT-1	CT-1	CT-1

Location

Manufacturer

Model Number

Cooling Capacity

Water Flow Rate

Water Spray Pressure

Entering Water Temp

Entering Air WB Temp

Electric Heater Capacity

Steam Heater

Pressure

Capacity

Overall Size

Length

Width

Height

Operating Weight

END OF SECTION