Marley Aquatower 490 User Manual

Cooling tower

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Marley Aquatower
®
Cooling Tower
User Manual 01-1248E

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Summary of Contents for Marley Aquatower 490

  • Page 1 Marley Aquatower ® Cooling Tower User Manual 01-1248E...
  • Page 2: Table Of Contents

    Contents This Manual contains vital information for the proper installation and operation of your cooling tower. Carefully read the manual before installation or operation of the tower and follow all instructions. Save this manual for future reference. Tower Installation......................3 Piping to Tower ......................4 Mechanical Equipment Installation .................5 Motor Electrical Connections ...................8 Starting and Operating Instructions ...............9...
  • Page 3 Installation Receiving Inspection The motor and miscellaneous parts ship with the tower. Check motor nameplate to be sure that power supply and motor have the same characteristics. Inspect the entire shipment for any damage that may have occurred in transit. Tower Location The cooling tower must be located at such distance and direction to Warning...
  • Page 4: Tower Installation

    Installation Tower Installation Install tower in a level position on a stable foundation. Anchor tower to the foundation through holes at base of tower, using four ⁄ ” diameter bolts (not supplied). Remove strapping and brackets from the louver face on models 494—496 and reinstall the bolts to the cold water basin.
  • Page 5: Mechanical Equipment Installation

    Installation Piping to Tower (Year–Round Operation) 1. If your tower must operate during freezing weather, it is recommended that the tower be installed for gravity flow operation. See Figure 2. 2. Provide an indoor open type storage tank with a capacity that will contain all water that will drain into the tank from the system during shutdown.
  • Page 6 Installation 2. Make sure the fan is tightly secured to the bearing housing shaft and that it rotates freely. Make sure the bearing housing is secured to its support. 3. Attach motor to motor base with four bolts, flat washers, lock washers and nuts provided, see Figure 3.
  • Page 7 Installation Use the adjusting bolts on the motor support to adjust belt tension. A correctly tensioned belt does not slip when the fan is running—and the “tight” side is straight between sheaves. The “slack” side will have a slight bow. If possible, use a commercially available tension measuring device. Avoid over-tensioning.
  • Page 8: Motor Electrical Connections

    Installation Motor Electrical Connections If Aquatower is equipped with Marley Control System, refer to Control Note System Manual for wiring instructions. Connect motor to power supply in accordance with the national Electric Code and local requirements. Failure to wire the motor correctly will void its warranty.
  • Page 9: Starting And Operating Instructions

    Operation Starting and Operating Instructions Among other sources, outbreaks of Legionnaires’ Disease have Warning reportedly been traced to cooling towers. Maintenance and water treatment procedures that prevent amplification and dissemination of Legionella and other airborne bacteria should be formulated and implemented BEFORE systems are operated and continued regularly thereafter to avoid the risk of sickness or death.
  • Page 10 Operation Hot water temperatures exceeding 125°F could damage PVC fill. Note 5. Make sure blowdown line is discharging water. 6. Depth of water in hot water basin should be uniform. If the basin overflows, reduce the flow rate. Do not pump more water than design capacity. Continue pump operation for about 15 minutes, after which it is recom- mended that the water system be drained, flushed, and refilled.
  • Page 11: Fan Cycling Limits

    Operation 9. Check fan for free rotation and check oil level in bearing housing as required (see maintenance instructions). Start motor and check direc- tion of rotation. Fan must rotate clockwise when viewed from the fan discharge side. If the rotation is incorrect, change any two of the three motor leads.
  • Page 12: Maintenance Instructions

    Maintenance Maintenance Instructions Always make certain that mechanical equipment is inoperable during Warning periods of maintenance—or during any situation of possible endan- germent to personnel. If your electrical system contains a disconnect switch, lock it out until the period of exposure to injury is over. The top of the tower is not a working surface.
  • Page 13 Maintenance Cooling Tower Cleaning Any evaporative-type cooling tower must be thoroughly cleaned on Warning a regular basis to minimize the growth of bacteria, including Legio- nella Pneumophila, to avoid the risk of sickness or death. Service personnel must wear proper personal protective equipment during decontamination.
  • Page 14: Blowdown

    Several methods are used to combat this, including automatic basin heater systems available from Marley. Unless some means of freeze prevention is incorporated into your...
  • Page 15: Seasonal Shutdown Instructions

    At start of new operating season, make sure bearings are adequately lubri- cated before returning motor to service. Prolonged Shutdown If shutdown period is longer than seasonal, contact your Marley Sales Rep- resentative for additional information. Whenever you order parts, or correspond with us about your tower,...
  • Page 16: Troubleshooting

    Troubleshooting Trouble Cause Remedy Unusal motor noise Motor running single-phase Stop motor and attempt to start it. Motor will not start if single- phased. Check wiring, controls and motor. Motor leads connected incorrectly Check motor connections against wiring diagram on motor. Bad bearings Check lubrication.
  • Page 17: Wiring Diagrams

    Wiring Diagrams Capacitor Start Single Phase Motors, Reversible, Double Voltage T1-L1 T1-L1 T5-L2 T5-L2 Without Thermal Overload (Integral HP) High Voltage 1. Connect T1 and L1 and insulate. 2. Connect T2, T3 and T8 and insulate. 3. Connect T4, T5 and L2 and insulate. Low Voltage 1.
  • Page 18 Three Phase Motors There are two basic ways of wiring a three phase motor, Wye and Delta. The following show the terminal connections that could be used in Marley motors. numbers could be stamped on insulation or cloth, plastic or metal bands around each lead.
  • Page 19 Wiring Diagrams NAMEPLATE LOW V HIGH V Voltage Tie Together T1 T7 T2 T8 T3 T9 T4 T5 T6 High (T4 T7) (T5 T8) (T6 T9) NAMEPLATE DELTA T8 T5 LOW V HIGH V Voltage Tie Together (T1 T7 T6) (T2 T8 T4) (T3 T5 T9) High (T4 T7) (T5 T8) (T6 T9) 3.
  • Page 20: Parts List

    490 Aquatower — 60 Cycle Motor Application Contact your local Marley sales representative for prices and availability, to place your order, or for help with identifying parts. To find you local Marley sales representative call 913 664 7400 or visit us online at spxcooling.com.
  • Page 21 Parts List 490 Aquatower — 50 Cycle Motor Application " 4 " 6 " 2 " 4 " 6 " 2 " 4 c i t " 8 " 4 " 6 " 8 " 4 " 6 " 4 c i t * Motor sheave part number shown is for a standard motor frame application.
  • Page 22 Parts List 490 Aquatower — 60 and 50 Cycle Motor Use this table to identify the Aquatower motor. Contact your local Marley sales representative for prices and avail- ability, to place your order, or for help with identifying the correct motor.
  • Page 23 Parts List 490 Aquatower — 60 Cycle Motor Application Use this table to identify the Aquatower motor. Contact your local Marley sales representative for prices and avail- ability, to place your order, or for help with identifying the correct motor.
  • Page 24 spxcooling.com 7401 WEST 129 STREET OVERLAND PARK, KANSAS 66213 UNITED STATES 913 664 7400 spxcooling@spx.com In the interest of technological progress, all products are subject to design and/or material change without notice. ©2009 SPX Cooling Technologies, Inc. | Printed in USA M01-1248E...

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