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Summary of Contents for SPX Cooling Technologies Marley NC alpha
- Page 1 u s e r m a n u a l alpha 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.
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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. Overview ........................3 Tower Location ......................4 Tower Shipment......................5 Receiving Tower ......................5... -
Page 3: Overview
The location and orientation of the cooling tower can affect the safety of those responsible for installing, operating or maintaining the tower. However, since SPX Cooling Technologies does not determine the location or orientation of the tower, we cannot be responsible for addressing those safety issues that are affected by the tower’s location or orientation. -
Page 4: Tower Location
overview • The need to avoid exposing maintenance personnel to the poten- tially unsafe environment inside the tower. 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. -
Page 5: Tower Shipment
receiving and hoisting Tower Shipment Unless otherwise specified, NC 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 before Note 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 Repeat steps 2 and 3 for 2nd top section on NC8411 and NC8412 models. 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 installation Fasteners and components provided by others that are to be attached Note to the tower must be compatible with the cooling tower materials—i.e. fasteners in a stainless steel cold water basin must be stainless steel. Except for the horizontal components of top-mounted piping, and as Caution prescribed on Marley drawings, do not support your pipe from the tower or inlet connection—support it externally.
- Page 9 installation Motor Wiring Wire motor leads as shown on the motor nameplate matching the supply volt- age. 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.
- Page 10 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 Cooling Technologies does not assume responsibility for any technical support or dam- ages for problems associate with non-Marley brand VFD systems.
- Page 11 installation Mechanical Equipment Always shut off electrical power to the tower fan motor prior to Warning performing 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.
- Page 12 installation 4. Momentarily bump (energize) the motor and observe rotation of the fan. The fan should rotate in a counterclockwise direction when viewed from below. If rotation is backwards, shut off the fan and reverse two of the three primary leads supplying power to the motor.
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Page 13: 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 14 operation 5. Completely open all hot water flow control valves. Start your pump(s) and observe system 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”...
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Page 15: Tower Operation
operation If the cooling tower has been in operation and then shut down for a duration 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 or operating the cooling tower fan. - Page 16 operation 4. Air flow rate: Reducing air flow through the tower causes the cold water temperature to rise. This is the approved method by which to control leaving water temperature. If your tower is equipped with a single-speed motor, the motor may be shut off when the water temperature becomes too cold.
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Page 17: Freezing Weather Operation
operation Freezing Weather Operation During operation in subfreezing weather, the opportunity exists for ice to form in the colder regions of the tower. Your primary concern is to prevent the formation of destructive ice on the cooling tower fill. Your understand- ing of cold weather operation will be enhanced if you read Technical Report H-003 “Operating Cooling Towers in Freezing Weather”, augmented by the following guidelines:... - Page 18 If the water bypass is directly into the tower’s cold water basin, its design must be approved by SPX Cooling Technologies Engineering. Intermittent Freezing Weather Operation: If periods of shutdown (nights, weekends, etc.) occur during freezing weather, measures must be taken to prevent the water in the cold water basin—and all...
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Page 19: Water Quality And Blowdown
operation Water Quality and Blowdown Maintaining Water Quality: The steel used in NC towers has been galvanized with a heavy zinc coating averaging 2.0 mils in thickness. The NC stainless steel option is even more corrosion resistant than galvanized steel in certain environments. Other ma- terials used (PVC fill, drift eliminators, and louvers, aluminum fans, cast iron Geareducer, etc.) are selected to offer maximum service life in a “normal”... - Page 20 operation Blowdown: A cooling tower cools water by continuously causing a portion of it to evaporate. Although the water lost by evaporation is replenished by the makeup system, it exits the tower as pure water—leaving behind its burden of dissolved solids to concentrate in the remaining water.
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Page 21: Cooling Tower Inspection And Maintenance
maintenance Cooling Tower Inspection and Maintenance 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 22 maintenance Belt Tensioning: The belt tension is adjusted by loosening the 8 bolts that secure the motor mount frame to the belt drive frame, then loosen the retaining nuts on the two threaded rods and turn the threaded rods to apply proper tension. Apply the same quantity of turns to each threaded rod to insure that the tensioning frame remains parallel to the mechanical support beams.
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Page 23: Schedule Of Tower Maintenance
maintenance Bushing Fastener · t f · N ƒ Torque Values ₄ ⁄ ¹ ₄ ⁄ ¹ ₄ ⁄ ¹ ⁵ ₆ ₁ ⁄ ₈ ⁄ ³ ₂ ⁄ ¹ ⁹ ₆ ₁ ⁄ Schedule of Tower Maintenance: Some maintenance procedures may require maintenance personnel to enter the tower. - Page 24 maintenance Monthly (Weekly at start up) Observe, touch, and listen to the tower. Become accustomed to its normal appearance, sound, and level of vibration. Abnormal aspects relating to the rotating equipment should be considered reason to shut down the tower until the problem can be located and corrected. Observe operation of the motor, coupling (or drive shaft), Geareducer and fan.
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Page 25: Motor Relubrication Instructions
maintenance Motor Lubrication Instructions of this manual for towers equipped with the motor outside the plenum area. Fan motors with sealed bearings do not require lubrication maintenance. If the motor has sealed bearings, additional lubrication is not re- Note quired. Refer to the motor nameplate to determine if grease type and amount are specified. -
Page 26: Seasonal Shutdown Instructions
maintenance 3. Insert grease fittings in grease fill openings and add grease until grease is forced out through relief openings. 4. Replace fill plugs and operate mechanical equipment 30 minutes to one hour to purge excess grease at grease relief opening. 5. -
Page 27: Prolonged Shutdown
If shutdown period is longer than seasonal, contact your Marley sales repre- sentative for additional information. SPX Cooling Technologies’ Services Our interest in your NC cooling tower does not end with the sale. Having conceived, designed, and manufactured the most reliable and longest-lasting cooling tower on the market, we want to make sure that you gain the maximum possible benefit from its purchase. -
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 Check transformer and setting of taps. Use higher voltage on Voltage too low at motor transformer terminals or reduce loads. Increase wire size or reduce terminals because of line drop Motor does not come up to inertia.
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Page 30: 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 31: Additional Information
Tower rebuilding SPX Cooling Technologies routinely rebuilds and upgrades cooling towers of all materials and manufacture. If your tower ever reaches the limit of its service life, we recommend that you investigate the cost of rebuilding before you routinely order a new replacement tower. - Page 32 7401 WEST 129 STREET Z0331804_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 and/or material change without notice.
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