A6 - Part Number Description and Quantity.pdf

Part Number/Description and Quantity

This requirement is to purchase the following:

Line No.

Part Number

Description

Quantity

1 NC8402KAN Factory assembled 2-cell crossflow cooling tower (Tower specifications listed below.)

Brand: Marley

Marley cooling tower specifications:

Performance Conditions:

Per 2-cell tower: 688 gpm, 96.0°F Hot Water, 85.0°F Cold Water, 80.0°F Entering WB Motor Data:

NEMA 5 HP 1 speed / 1 wind 3 phase / 60 Hz / 230/460V 1.15sf / TEFC

1200 RPM

Premium Efficiency Inverter duty nameplated 60 Hz/120V Space Heater Site Voltage: 480 Tower Dimensions:

Each cell: (without options) Length: 8’-4 ¾” Width: 14’-2” Height: 10’-3” Per 2-cell tower: (with options) Length: 25’-2 7/16” Width: 14’-2” Height: 15’-7 5/16” Weights:

Per Cell:

Shipping: 7,14 lb Operating: 12,445 lb Per 2-cell tower:

Shipping: 14,027 lb Operating: 24,889 lb Base Tower Construction / Equipment:

Stainless Steel casing, structure, collection basin, distribution basin, fan guard, and fan cylinder extension Low Sound fan with aluminum blades Marley designed Geareducer® with 5-year warranty.

Motor mounted outside the moist air stream.

15 mil PVC film fill with integral louvers and drift eliminators designed and manufactured by Marley.

Published sound data is independently verified by a CTI licensed test agency CTI certification per STD-201 12 in. fan cylinder extension Collection Basin Connections and Accessories:

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

All threds are to American Standard Pipe Taper Thread.

(2) 10 in. diameter depressed side sump outlets with trash screens 6 in. diameter hole and bolt circle for equalization, Cell to Cell

(2) 4 in. diameter Bottom inlet Bypass connections sized for 100% of design flow 4 in. diameter combination drain and overflow in each cell 4 in. additional drain with plug in each cell

(2) 1 in. water make-up float valves 9 kW per cell 480/3 volt/phase electric immersion heater for freeze protection of the collection basin during cold weather shutdown INDEECO basin heater control system with control panel/cell and heater elements Heater system disconnect switch Factory installed basin sweeper piping, 20 PSI Standard Distribution Basin Inlet and Accessories:

(2) 6 in. diameter top inlet connections per cell.

(2) 6 in. horizontal flow control valves per cell.

Variable flow nozzles.

Maintenance & Maintenance Access Features:

Tower is designed in accordance with OSHA safety standards.

External lube line with dipstick Low oil level switch, Marley Ultrasonic DC sensor + AC interface relay box, with 25 ft sensor cord.

Convenient access to the collection basin and plenum area provided via a large access door located on each end wall.

(2) Access door platforms Stainless Steel (per SS Grade) plenum walkway in each cell

(2) Cased face ladders Ladders extended 72 in. below base of tower Easy fitting ladder safety cage(s) Self-closing safety gates included at the top of the access ladders One davit with hand winch per tower.

Electrical System Requirements:

The following information is provided as guidance for electrical system design criteria to power each cell of the equipment in this tower based on site voltage listed in Mechanical Data above.

Description (See Mechanical Data above for sizes)

Amperage at Site Voltage (defined above)

Fan Motor 1 1 @ 7.6 Fan Motor 2 N/A Spray Pump N/A Basin Heater 10.8 Auxiliary Load 6

Total Ful Load Amps FLA 24.4 Main Circuit Breaker MCB 35 Maximum Over Current Protection

MOCP

Full Load Amps (FLA) is the full load current at the rated voltage that the fan motor(s) and pump motor(s) will draw to produce rated output horsepower (HP). Values shown for motor full load amps are from NEC table 430.250. Included in this calculation are the amps necessary for optional basin heaters and some auxiliary load for control circuitry.

Full Load Amps per cell = Sum of Fan motor Amps + Sum of Pump motor Amps (when supplied) + Basin Heater Amps (when supplied) + Auxiliary Load (6)

The main circuit breaker (MCB) is an electrical switch designed to protect an electrical circuit from damage caused by overcurrent/overload or short circuit. The MCB value shown above is derived using appropriate overload factors, assuming the full load amps cited are being supported, based on many years of electrical control panel experience on heat rejection equipment. This will be the MCB size incorporated into the tower control panel if provided by Marley.

When provided, the Marley control panel includes an integrated overcurrent device therefore; sizing a remote MOCP type of device is not required to protect the control panel, but it may be sized considering any other installation factors required by code to protect the cable feeding the panel.

Control Systems:

(1) IMI 685A Mechanical sw, DPDT, manual reset + 30’ cord vibration cutoff switch per cell

(1) Field installed VFD ACH580 MCB E-Clipse by-pass Indoor NEMA 12 control panel per cell RTD temperature sensor for VFD standalone operation NEMA 1 VFD output filter.