SPX Marley NCWD User Manual
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SPX Marley NCWD User Manual

Cooling tower
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u s e r m a n u a l
®
NC
WD cooling tower
I N STA 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.
Z0 3 3 1 674 _ E
I S S U E D 0 4 /2 0 1 9

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Summary of Contents for SPX Marley NCWD

  • Page 1 u s e r m a n u a l ® WD cooling tower I N STA 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.

  • 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. Tower Location ......................4 Tower Shipment......................5 Receiving Tower ......................5 Hoisting Tower ......................5...
  • Page 3 Any such deviation, change or modification shall be the responsibility of the party or parties making such deviation, change or modification. SPX Cooling Technologies, Inc. expressly disclaims all liability for any such deviation, change or modification.

  • Page 4: Tower Location

    Those are only some of the safety issues that may arise in the design process. SPX strongly recommends that you consult a safety engi- neer to be sure that all safety considerations have been addressed. Several options are available that may assist you in addressing some of these personnel safety concerns, including: —...

  • Page 5: Tower Shipment

    receiving and hoisting Tower Shipment Unless otherwise specified, NCWD towers ship by truck (on flat bed trailers), which lets you receive, hoist, and install the tower in one continuous operation. Single-cell towers ship on one truck. Multicell towers, depending on their size, may require more than one truck.

  • Page 6: Tower Installation

    installation Tower Installation These installation instructions are intended to help you prepare Note before your tower arrives. If discrepancies exist between these instructions and those shipped with the tower, the instructions shipped with the tower will govern. 1. Prior to placement of the tower, confirm that the supporting platform is level, and that the anchor bolt holes are correctly located in accordance with Marley drawings.
  • Page 7 installation 8. Repeat steps 4 through 7 for any remaining cells. 9. Attach your cold water supply piping to the cold water basin outlet connec- tion in accordance with drawing instructions, utilizing gaskets provided. Do not support your pipe from the tower or outlet connection—sup- Caution port it externally.
  • Page 8 Marley drawings, do not support your pipe from the tower or inlet connection—support it externally. 12. Wire motor in accordance with wiring diagram. For maintenance/safety purposes, SPX recommends a lockout Warning type disconnect switch for all mechanical equipment. In addition...
  • Page 9 installation When using a two-speed starter: • Motor rotation must be the same at slow speed and high speed. • Single winding motor requires a starter with a shorting contactor. • Two-winding motor requires a starter with out a shorting contactor. •...
  • Page 10 VFD drive system. The length of this warranty avoidance will be contingent on properly installing the VFD system and repairing any damage that may have occurred during its operation. SPX Cool- ing Technologies does not assume responsibility for any technical support or damages for problems associate with non-Marley brand VFD systems.
  • Page 11 installation Improper installation of the fan cylinder and fan guard will destroy Warning the structural integrity of the fan guard. Failure of the fan guard could allow operating or maintenance personnel to fall into the rotating fan. 3. Spin the fan manually to assure that all fan blades properly clear the inside of the fan cylinder.

  • Page 12: Tower Startup

    operation Tower Startup 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 13 operation 6. Completely open all hot water valves. Start your pump(s) and observe sys- tem operation. Since the water system external to the tower will have been filled only to the level achieved in the cold water basin, a certain amount of “pump-down”...

  • Page 14: Tower Operation

    operation If the cooling tower has been in operation and then shut down for a du- ration of time and not drained, perform one of the two previous biocidal treatment programs directly to the cooling water storage vessel (cooling tower sump, drain down tank, etc.) without circulating stagnant water over the cooling tower fill/coil or operating the cooling tower fan.
  • Page 15 operation 4. Water valve position For maximum cooling, open the water valve leading to the hot water distribution basin and close the water valve leading to the plume abatement coil. In plume abated mode/winter operation, fully open the water valve leading to the plume abatement coil and completely close the water valve leading to the hot water distribution basin.

  • Page 16: Freezing Weather Operation

    operation Do not start the motor more than four to five times per hour (each Note low speed start and each high speed start count as one start). If your tower consists of two or more cells, cycling of motors may be shared between cells, increasing your steps of operation accordingly.
  • Page 17 operation If the minimum allowable cold water temperature is established Caution at or near minimum heat load, it should be safe for all operating conditions. Having established the minimum allowable cold water temperature, maintain- ing that temperature can be accomplished by fan manipulation, as outlined in Item 4 under Tower Operation.

  • Page 18: Water Quality And Blowdown

    Several methods are used to combat this, including automatic basin heater systems available from Marley. The plume abatement coils on the Marley NCWD tower are equipped with continuous drain down piping located in the lower corner of the coil oppo- site the water inlet.
  • Page 19 operation Circulating water with a pH between 6.5 and 8; a chloride content (as NaCl) below 500 ppm; a sulfate content (SO4) below 250 ppm; total alkalinity (as CaCO ) below 500 ppm; calcium hardness (as CaCO ) above 50 ppm; a maximum inlet water temperature not to exceed 125°F;...

  • Page 20: Cooling Tower Inspection And Maintenance

    maintenance In order to achieve water quality which is acceptable to the cooling tower (as well as the remainder of your circulating water system), the selected water treatment company must work from a relatively constant level of concentra- tions. This stabilization of contaminant concentrations is usually accomplished by blowdown, which is the constant discharge of a portion of the circulating water to waste.

  • Page 21: Schedule Of Tower Maintenance

    maintenance tower, the water management plan and maintenance procedures must be in place and regularly practiced. In addition, the following steps are recommended: Do NOT attempt any service unless the fan motor is locked out. • Consult a knowledgeable water treatment professional to clean and treat your cooling tower.
  • Page 22 maintenance The purchaser or owner is responsible for providing a safe method Warning for entering or exiting the access door. Use of the fan deck ladder to enter or exit the access doors may result in a fall. Included with this instruction packet are separate Manuals on each major operating component of the tower, and it is recommended that you read them thoroughly.
  • Page 23 maintenance Check for any buildup of silt on the floor of the cold water basin. Mentally make note of the amount, if any, so future inspections will enable you to determine the rate at which it is forming. Semi-Annually Check Geareducer oil level. Shut down the unit and allow 5 minutes for the oil level to stabilize.

  • Page 24: Motor Relubrication Instructions

    maintenance Motor Lubrication Instructions: Motor located outside plenum option. Not required for motors with sealed bearings. Open and lock out disconnect switch to make certain motor cannot Warning be started. Steel Side Casing Motor Grease Fill Plug Attachment Screw Guard Grease Relief Plug 1.

  • Page 25: Prolonged Shutdown

    maintenance Following each year’s shutdown and cleaning, inspect the tower’s metal surfaces for evidence of the need to apply a protective coating. Do not mis- interpret grime—and transient rust from the piping system—as a need to have the tower painted. If relatively bright metal can be exposed by cleaning, con- sider that the galvanizing has remained effective.
  • Page 26 Be sure to mention your tower serial number (from the tower nameplate) when ordering parts. Periodic maintenance You may wish to contract with SPX for regularly scheduled visits—for the purpose of inspecting and reporting your tower’s condition—to make recommendations intended to prevent emergencies— and to perform maintenance considered outside the norm.

  • Page 27: 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 28: Troubleshooting

    troubleshooting Trouble Cause Remedy Check power at starter. Correct any bad connections between the control apparatus and the motor. Power not available at motor Check starter contacts and control circuit. Reset overloads, close terminals contacts, reset tripped switches or replace failed control switches. If power is not on all leads at starter, make sure overload and short circuit devices are in proper condition.
  • Page 29 troubleshooting Trouble Cause Remedy If new, see if noise disappears after one week of operation. Drain, flush Geareducer bearings and refill Geareducer oil. See Geareducer User Manual. If still noisy, replace. Geareducer noise Correct tooth engagement. Replace badly worn gears. Replace gears Gears with broken or damaged teeth Tighten all bolts and cap screws on all mechanical equipment and...

  • Page 30: Additional Information

    Marley sales representative before proceeding. In addition to these specific documents, SPX publishes numerous technical reports including more detailed information on a variety of cooling tower op- eration and service topics. Your Marley sales representative will be happy to give you copies of these reports at no charge.
  • Page 32 SPX COOLING TECHNOLOGIES, INC. 7401 WEST 129 STREET Z0331674_E ISSUED 04/2019 OVERLAND PARK, KS 66213 USA ©2010-2019 SPX COOLING TECHNOLOGIES, INC ALL RIGHTS RESERVED 913 664 7400 | spxcooling@spx.com In the interest of technological progress, all products are subject to design spxcooling.com...

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