SPX MARLEY NX User Manual Download Page 2

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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.

Overview ...........................................................................................................  3
Safety .................................................................................................................  3
Tower Shipment...............................................................................................  4
Receiving Tower ..............................................................................................  4
Tower Location ................................................................................................  4
Tower Installation.............................................................................................  5
Motor Wiring ....................................................................................................  6
Mechanical Equipment ..................................................................................  6
Tower Startup ..................................................................................................  7
Tower Operation ..............................................................................................  9
Water Quality and Blowdown ......................................................................  12
Tower Maintenance.........................................................................................  13
Schedule of Tower Maintenance .................................................................  18
Seasonal Shutdown Instructions ................................................................  19 
Prolonged Shutdown .....................................................................................  20
Additional Services .........................................................................................  20
Troubleshooting ...............................................................................................  22

The following defined terms are used throughout this manual to bring attention 
to the presence of hazards of various risk levels, or to important information 
concerning the life of the product.

Note

Indicates presence of a hazard which can cause severe personal 
injury, death or substantial property damage if ignored.

Indicates presence of a hazard which will or can cause personal 
injury or property damage if ignored.

Indicates special instructions on installation, operation or maintenance 
which are important but not related to personal injury hazards.

 

Warning

 

Caution

Note

Summary of Contents for MARLEY NX

Page 1: ...NX cooling tower INSTALLATION OPERATION MAINTENANCE sea_Z1049225_C ISSUED 8 2018 READ AND UNDERSTAND THIS MANUAL PRIOR TO OPERATING OR SERVICING THIS PRODUCT user manual...

Page 2: ...aintenance 18 Seasonal Shutdown Instructions 19 Prolonged Shutdown 20 Additional Services 20 Troubleshooting 22 The following defined terms are used throughout this manual to bring attention to the pr...

Page 3: ...cool ing tower and you don t find the answers in this manual please contact your Marley sales representative When writing for information or when ordering parts pleaseincludetheserialnumbershownonthe...

Page 4: ...stic tote in the cold water basin This information should be kept for future reference and maintenance purposes Tower Location Space available around the tower should be as generous as possible to pro...

Page 5: ...g the item number is the same Ensure the fan blade pitch correct Fan blades and hub of one fan cannot be exchanged each other 4 Using gaskets by others connect piping to the tower sump NX1010 NX1015 6...

Page 6: ...and will decrease motor life Changing the operational fan speed from the factory settings could cause the fan to operate in an unstable region which may result in damage to the equipment and possible...

Page 7: ...rmal operation Tower Startup Microorganisms including Legionella bacteria can exist in premise plumbing including cooling towers The development of an effective watermanagementplan WMP andimplementati...

Page 8: ...ith uniform depth from basin to basin Fix valves in this position when depth is correct 8 Continuepumpoperationforabout15minutesafterwhichitisrecommended the water system be drained flushed and refill...

Page 9: ...also cause an increase in the incoming hot water temperature Use care to prevent the hot water from exceeding 44 C in order to prevent damage to the tower components 4 Airflow Rate Reducing airflow t...

Page 10: ...face particularly near the bottom of the louver face If hard ice is present on the louvers an appropriate elevation in the allowable cold water temperature is mandatory If the coldest pos sible water...

Page 11: ...lades and be thrown off damaging fan cylinder or blades Allow a minimum of 10 minute delay between reverse operation and forward opera tion during subfreezing weather to permit ice to dissipate from f...

Page 12: ...ain significant chlorides or hydrogen sulfide H2S Many proprietary chemicals exist for control of scale corrosion and biological growth and should be used prudently Also combinations of chemicals may...

Page 13: ...e cold water basin of the cooling tower Water velocities are lowest at that point which results in inadequate mixing Cooling Tower Inspection and Maintenance Microorganisms including Legionella bacter...

Page 14: ...help identifying the sales representative in your area visit spxcooling com replocator References ashrae org Search ASHRAE Standard 188 and ASHRAE Guideline 12 cdc gov Search Water Management Program...

Page 15: ...ght nuts Ideal tension is the lowest tension at which the belt will not slip under peak load conditions Check tension frequently during the first 24 48 hours of run in operation Over tensioning shorte...

Page 16: ...ation of the motor fan shaft bearing and fan Become familiar with the normal operating temperature of the motor as well as the sight and sound of all components as a whole Monthly Weekly at startup In...

Page 17: ...ed in the Assembly Manual Check the belt tension and condition Annually Lubricate motor according to the manufacturer s instructions Fan motors with sealed bearings do not require lubrication maintena...

Page 18: ...y 3 months Check and tighten support fasteners x Check shaft sheave and belt alignment x Check belt tension and condition x x Check sheave bushing fastener torque x Fan Check and tighten blade and hub...

Page 19: ...ch up should be all that is required To the extent that the galvanizing zinc coating still exists paint will not adhere to it readily Contact the manufacturer of the coating you intend to use for inst...

Page 20: ...hey can normally be shipped within 48 hours by air freight if necessary However you would obviously benefit from anticipating your need in advance thus avoiding the cost of special handling Be sure to...

Page 21: ...documents contain important information relating to safe installation and operation of the cooling tower If installation details are not covered in the NX Field Installation Manual a separate install...

Page 22: ...ts of all three lines Correct if required Air gap not uniform Check and correct bracket fits or bearing Rotor unbalance Rebalance Cooling fan hitting end belt guard Reinstall or replace fan Motor runs...

Page 23: ...dy with Marley representative Design wet bulb temperature was too low May have to increase cooling tower size Discuss remedy with Marley representative Actual process load greater than design May have...

Page 24: ...ogical progress all products are subject to design and or material change without notice SPX COOLING TECHNOLOGIES MALAYS IA Sdn Bhd UNIT 505 BLOCK B PHILEO DAMANSARA 2 NO 15 JALAN 16 11 OFF JALAN DAMA...

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