| Furnish and install EVAPCO Model(s) LRT _______ Counterflow, Blow-Through Cooling Tower with single side air entry to cool ______ GPM (liters/sec) of water from ____°F (ºC) to ____°F (ºC) with a ____°F (ºC) entering wet bulb temperature. Unit height shall not exceed _____feet (meters). The tower(s) shall operate against _____ w.g. external static pressure. Cooling tower(s) shall be fully assembled with all moving parts factory mounted and aligned.
Cold Water Basin
The complete cold water shall be constructed of Type 304 stainless steel for long life and durability. Standard cold water basin accessories shall include Type 304 stainless steel overflow, drain, anti-vortexing hood, strainers and brass make-up valve with unsinkable, foam filled plastic float. A circular access door shall be located above the basin to allow easy access to the pan interior. The outlet shall be Type 304 stainless steel grooved for a mechanical coupling and beveled for welding or a threaded connection.
Casing and Fan Section
The casing and fan section shall be constructed of G-235 (Z600-Europe) galvanized steel for long life and durability. Fan section shall include fans, motors and drives. The entire drive system (including fans, motors, sheaves and belts) shall be located in the dry entering air stream.
Centrifugal Fans and Drives
The complete drive system, including the fan housing, electric motor, belts, bearings and drives shall be completely enclosed by a protective housing which covers the drive system and provides sound reduction. Fans shall be forwardly curved centrifugal type of hot-dip galvanized construction. The fans shall be factory installed, statically and dynamically balanced for vibration free operation. The fans shall be mounted on either a solid steel shaft. The fan shaft shall be supported by heavy-duty, self aligning ball bearings with cast iron housings and lubrication fittings for maintenance. The fan drive shall be V-Belt type adjustable from outside the unit, with taper lock sheaves designed for 150% of the motor nameplate horsepower. Drives are to be mounted and aligned at the factory. A belt adjustment device shall be provided as standard.
Fan Motor
Fan motor(s) shall be _____Horsepower T.E.F.C. design with 1.15 service factor and suitable for outdoor installation on _____volts, ______hertz, and _____ phase electrical service. Motor(s) shall be mounted on an adjustable base.
Fill Section*
The cooling tower fill shall be PVC (Polyvinyl Chloride) of cross-fluted design for optimum heat transfer and efficiency. The cross-fluted sheets shall be bonded together for strength and durability. The fill shall have special drainage tips to allow high water loading and low pressure drop. The fill section shall be easily removed from the cooling tower casing section. The PVC fill shall be self-extinguishing for fire resistance with a flame spread rating of 5 per ASTM E84-81a. It shall also be resistant to rot, decay or biological attack. The fill shall be able to withstand a water temperature of 130º (54,4ºC)
* The LRT uses the patented EVAPAK® fill (U.S. Patent No. 5,124,087) which is designed to induce highly turbulent mixing of the air and water for superior heat transfer.
The LRT Water Distribution System
The spray header and branches shall be constructed of Schedule 40 PVC (Polyvinyl Chloride) pipe for corrosion resistance and shall have a steel connection which is either beveled for weld/grooved for a mechanical coupling or threaded to attach the external piping. The water shall be distributed over the fill by precision molded threaded ABS spray nozzles with large 3/8 by 1 inch (9,5 mm by 25,4 mm) orifice openings and integral sludge ring to prevent clogging. The internal tower water distribution system piping shall be removable for cleaning and have threaded end caps to allow debris to be removed.
Eliminators
The eliminators shall be constructed of inert polyvinyl chloride (PVC) that has been specially treated to resist UV degradation. Assembled in easily handled sections, the eliminators shall incorporate three changes in air direction to assure removal of entrained moisture from the discharge air stream. The drift rate shall not exceed 0.001% of the recirculated water rate.
Finish
The complete cold water basin shall be constructed of Type 304 stainless steel for maximum corrosion protection. The casing and fan section shall be constructed of G-235 (Z600-Europe) heavy gauge mill hot-dip galvanized steel. During fabrication, all panel edges shall be coated with a 95% pure zinc compound. Coated finishes shall not be acceptable.
Mechanical Equipment Warranty
The motor and drive system shall carry a 5 year warranty from the date of shipment, against defects in materials and workmanship including the fan(s), bearings, sheaves, shafts, fan motor(s) and mechanical equipment supports.
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