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Summary of Contents for Marley Aquatower 490A
- Page 1 ® Marley Aquatower Cooling Tower User Manual 01-1248D...
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Page 3: Table Of Contents
Contents Tower Installation ..................4 Piping to Tower ..................5 Mechanical Equipment Installation ............6 Motor Wiring ................... 9 Starting and Operating Instructions ............. 12 Maintenance Instructions ..............14 Cooling Tower Cleaning ............... 16 Blowdown ..................... 17 Seasonal Shutdown Instructions ............18 Troubleshooting .................. - Page 4 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 char- acteristics. 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...
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Page 5: 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 4940, 4950, and 4960 and reinstall the bolts to the cold water basin. -
Page 6: 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 1. 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 7 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. . Attach motor to motor base with four bolts, flat washers, lock wash- ers and nuts provided, see Figure 2.
- Page 8 Installation 7. 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.
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Page 9: Motor Wiring
Installation Motor Wiring Wire motor leads as shown on the motor nameplate matching the supply voltage. Do not deviate from the motor nameplate wiring. Either of following symbols may be shown on the motor nameplate – Δ, Δ Δ , , or . - Page 10 User Manual for that system. Most VFD problems can be avoided by purchasing the Marley drive system. If you are installing a VFD other than the Marley drive, please refer to that drives installation manual.
- Page 11 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.
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Page 12: 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 13 Operation 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. 7. Continue pump operation for about 15 minutes, after which it is rec- ommended that the water system be drained, flushed, and refilled.
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Page 14: 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 15: Maintenance Schedule
Maintenance Schedule Maintenance Service Monthly Semi-annually Seasonal Startup or Annually Inspect General Condition and Operation Observe Operation of: Mechanical–motor, fan and drive mechanism Makeup valve (if equipped) Inspect for unusual noise or vibration Inspect and Clean: Air inlet PVC drift eliminators Distribution basin, nozzles and collection basin Fan motor exterior Check:... -
Page 16: Cooling Tower Cleaning
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 17: Blowdown
Several methods are used to combat this, including Marley automatic basin heater system. Unless some means of freeze prevention is incorporated into your... -
Page 18: Seasonal Shutdown Instructions
At start of new operating season, make sure bearings are adequately lubricated before returning motor to service. Prolonged Shutdown If shutdown period is longer than seasonal, contact your Marley Sales Representative for additional information. Whenever you order parts or correspond with us about your tower,... -
Page 19: Troubleshooting
Troubleshooting Trouble Cause Remedy Unusual 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 20: Wiring Diagrams
Wiring Diagrams Capacitor Start Single Phase Motors, Reversible, Double Voltage T1-L1 T5-L2 Without Thermal Overload (Integral HP) High Voltage 1. Connect T1 and L1 and insulate. 2. Connect T2, T and T8 and insulate. . Connect T4, T5 and L2 and insulate. Low Voltage 1. - Page 21 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 22 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 LOW V HIGH V Voltage Tie Together (T1 T7 T6) (T2 T8 T4) (T3 T5 T9) High (T4 T7) (T5 T8) (T6 T9)
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Page 23: Parts List
4900 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 800 462 759 or check the internet at spxcooling.com "... - Page 24 Parts List 4900 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 25 Parts List 4900 Aquatower — 60 Cycle Motor Use this table to identify the Aquatower motor. Contact your local Marley sales representative for prices and availability, to place your order, or for help with identifying the correct motor. *Indicates standard motor for each model. Other motors shown are supplied for particular electrical supply characteristics. Check the...
- Page 26 Parts List 4900 Aquatower — 50 Cycle Motor Use this table to identify the Aquatower motor. Contact your local Marley sales representative for prices and availability, to place your order, or for help with identifying the correct motor.
- Page 28 Balcke Hamon Dry Cooling Marley 7401 W 129 Street // Overland Park, KS USA 66213 // +1 913 664 7400 // spxcooling@ct.spx.com // www.spxcooling.com In the interest of technological progress, all products are subject to design and/or material change without notice ©2007 SPX Cooling Technologies, Inc.
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