Summary of Contents for Marley NC fiberglass
- Page 1 u s e r m a n u a l ® fiberglass cooling tower I N S TA L L AT I O N - O P E R AT I O N - M A I N T E N A N C E READ AND UNDERSTAND THIS MANUAL PRIOR TO OPERATING OR SERVICING THIS PRODUCT.
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Page 2: Table Of Contents
contents This manual contains vital information for the proper installation and Note 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. Page Tower Shipment....................Receiving Tower .................... -
Page 3: Tower Shipment
NC Fiberglass towers ship by truck unassembled. Responsibility for the condition of the tower upon its arrival belongs to the shipper—as does the coordination of multiple shipments, if required. Refer to the NC Fiberglass Assembly Manual for instructions. Receiving Tower Prior to assembly, inspect the shipment for evidence of damage in transit. -
Page 4: Tower Location
Tower Assembly Your Marley sales engineer is able to provide for the tower assembly by Marley’s construction division or through a qualified subcontractor. Our subcontrac- tors provide safe, efficient assembly which complies with all requirements for warranty protection of your tower by SPX Cooling Technologies. -
Page 5: Motor Wiring
Do not deviate from the motor nameplate wiring. Internal space heaters may be present, depending upon the motor manufac- turer. For space heater operation and wiring refer to the Marley “Fan Motor” User Manual Z0239042. Either of following symbols may be shown on the motor nameplate –... -
Page 6: Mechanical Equipment
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 7 installation Mechanical Equipment Always shut off electrical power to the tower fan motor prior to performing Warning any maintenance on the tower. Any electrical switches should be locked out and tagged out to prevent others from turning the power back on. 1.
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Page 8: Tower Startup
operation Tower Start-Up Microorganisms including Legionella bacteria can exist in premise Warning plumbing including cooling towers. The development of an effective water management plan (WMP) and implementation of maintenance procedures are essential to prevent the presence, dissemination and amplification of Legionella bacteria and other waterborne contami- nants throughout premise plumbing. - Page 9 operation 6. Continue pump operation for about 15 minutes, after which it is rec- ommended that the water system be drained, flushed, and refilled in order to clean the system. 7. While operating the pump(s) and prior to operating the cooling tower fan, execute one of the two alternative biocidal treatment programs described in the following: •...
- Page 10 operation Tower Operation General: The cold water temperature obtained from an operating cooling tower will vary with the following influences: 1. Heat Load With the fan in full operation, if the heat load increases, the cold water temperature will rise. If the heat load reduces, the cold water temperature will reduce.
- Page 11 Your primary concern is to prevent the formation of destructive ice on the cooling tower fill. Your understanding of cold weather operation will be enhanced if you read Marley Technical Report H-003 , “Operating Cooling Towers in Freezing Weather, ” augmented by the following guidelines.
- Page 12 operation 1. Do not allow the tower’s leaving water temperature to drop below a minimum allowable level (2.5° to 5°C) established as follows: During the coldest days of the first season of operation, observe whether any ice is forming on the louver face, particularly near the bottom of the louver face.
- Page 13 Several methods are used to combat this. Consult your Marley sales representative for more information. Unless some means of freeze prevention is incorporated into your...
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Page 14: Tower Maintenance
Water Treatment and Blowdown Maintaining Water Quality: The materials used in an NC Fiberglass tower are selected to offer long, corrosion-free service in a “normal” cooling tower environment, defined as follows: • Circulating water with a pH between 6.5 and 8; a chloride content (as NaCl) below 500 mg/L;... - Page 15 maintenance n i l 3°C 6°C 8°C 11°C 14°C e i l t f i Range = Difference between hot water temperature coming to tower and cold water temperature leaving tower. EXAMPLE: 159.1 m /hr circulating rate, 10°C cooling range. To main- tain 4 concentrations, the required blowdown is 0.458% or .00458 times 159.1 m /hr, which is 0.7 m...
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Page 16: Schedule Of Tower Maintenance
Legionella, follow the water management plan for your facility, perform regularly scheduled cooling tower inspections and maintenance, and enlist the services of water treatment professionals. For additional technical support, contact your Marley sales represen- tative. For help identifying the sales representative in your area, visit spxcooling.com/replocator. - Page 17 maintenance Belt Tensioning: The belts are adjusted by tensioning bolts which adjust the motor base. Check tension frequently during the first 24-48 hours of run-in operation. To properly adjust the belt tension, position the fan motor so that moderate pressure on the belt midway between the sheaves will produce a 13mm deflection.
- Page 18 If equipped, check Geareducer oil level. Shut down the unit and allow 5 min- utes for the oil level to stabilize. Add oil if required. If equipped, Geareducer models used on NC Fiberglass cooling Note towers are designed for 5-year oil change intervals. To maintain five- year change intervals, use only oil designed specifically for these Geareducers.
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Page 19: Seasonal Shutdown Instructions
The motor should be operated for three hours at least once a month. This serves to dry out windings and lubricate bearing surfaces. Refer to Marley “Fan Motor” User Manual Z0239042 for additional information. -
Page 20: 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 21: Additional Services
Additional Services Our interest in your NC Fiberglass cooling tower does not end with the sale. We want to make sure that you gain the maximum possible benefit from its purchase. Therefore, the following services are available which are intended to assure... -
Page 22: Troubleshooting
Too frequent starting or speed Set on/off or speed change set-points farther apart. Consider installing changes a Marley VFD for fine temperature control. Deterioration of grease or foreign Flush bearings and relubricate. Does not apply to motors with sealed material in grease bearings. - Page 23 Discuss remedy with Marley representative. Design wet-bulb temperature May have to increase tower size. Discuss remedy with Marley was too low representative. Cold-water temperature too Actual process load greater May have to increase tower size.
- Page 24 NC Fiberglass U S E R M A N UA L SPX COOLING TECHNOLOGIES UK LTD 3 KNIGHTSBRIDGE PARK uk_Z0702489_D ISSUED 8/2018 WORCESTER WR4 9FA UK © 2009-2018 SPX COOLING TECHNOLOGIES, INC ALL RIGHTS RESERVED 44 1905 750 270 @spx.com ct.fap.emea...
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