Marley Aquatower User Manual Download Page 24

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uk_Z0504653_E

ISSUED 8/2018

In the interest of technological progress, all products are subject to design
and/or material change without notice.

SPX COOLING TECHNOLOGIES UK LTD

3 KNIGHTSBRIDGE PARK

WORCESTER WR4 9FA UK
44 1905 750 270

ct.fap.emea

@spx.com

spxcooling.com

Aquatower

U S E R MAN UAL

Summary of Contents for Aquatower

Page 1: ...Aquatower cooling tower INSTALLATION OPERATION MAINTENANCE READ AND UNDERSTAND THIS MANUAL PRIOR TO OPERATING OR SERVICING THIS PRODUCT user manual uk_Z0504653_E ISSUED 8 2018 ...

Page 2: ...ooling Tower Inspection and Maintenance 17 Seasonal Shutdown Instructions 18 Troubleshooting 20 Wiring Diagrams 21 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 Indicates presence of a hazard which can cause severe personal injury death or substantial pr...

Page 3: ...n shall be the responsibil ity 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 The equipment shall be warranted in accordance with the applicable SPX Cooling Technologies Certification of Limited Warranty If you have questions about the operation and or maintenance of t...

Page 4: ...tion Use a duct from the tower air discharge to the outside You may also want to install an inlet air duct Do not allow the total pressure loss through ducts to exceed 25 Pa To minimize pressure losses Use 20 oversize ducts Avoid sharp turns or abrupt changes in size Keep duct length to a minimum Screened or louvered openings should have a net free area at least 20 greater than the tower discharge...

Page 5: ... Outlet Heat Load Indoor Storage Tank Pump Make Up Line Inlet Gravity Line from Outlet Overflow and Drain to Sewer Figure 2 Piping to Tower Summer Only Operation 1 Use large enough piping to minimize friction loss 2 Connect float valve to makeup water supply Install the threaded valve stem and float located in the loose parts package 3 Install a valved blowdown line at some point in the system pre...

Page 6: ... flow 4 Install makeup water bleed off overflow and drain lines on tank 5 Insulate and heat water lines exposed to freezing temperatures Mechanical Equipment Installation Aquatowers with factory installed controls ship with the motor sheave belt and belt guard factory installed Remove shipping stiffener plate and hardware at the adjustable end of the motor support plate and proceed to Motor Electr...

Page 7: ... motor shaft to prevent shaft corro sion and to ease sheave installation and removal 5 Install motor sheave and align it with fan sheave Motor support brackets are slotted to assist in alignment See Figure 3 A plumb line will be helpful in aligning sheaves See Figure 4 6 Remove the fan guard and fan cylinder splice plate steel tower only at the top of the fan cylinder Install the belt over the fan...

Page 8: ...id over tensioning Too much tension reduces bearing and belt life Check the tension on new belts after 8 to 12 hours of operation 8 Install the belt guard as shown in Figure 3 for a steel tower or Figure 5 for a fiberglass tower 9 Install fan cylinder splice plate steel tower and fan guard 10 Check bearing housing oil cup level Fill to the proper level with SAE 30 ISO 100 weight oil 3 8 x 1 1 2 BO...

Page 9: ...tor User Manual Z0239042 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 Overload protection for motors must be part of the control system Figure 6 shows one possible control scheme Other various wiring diagrams appear on pages 19 through 22 Note installation L1 L2 L3 M M M STOP START M M ...

Page 10: ... Fill the circulating system with water The cold water basin should be filled with water until level is at the rim of the overflow The water conditions during the initial tower operation are crucial in pre venting premature corrosion of galvanized steel white rust For at least the first eight weeks of operation pH should be controlled between 6 5 and 8 0 with hardness and alkalinity levels between...

Page 11: ...de residual for the specific biocide for a sufficient period of time residual and time will vary with the biocide to bring the system under good biological control or Treat the system with sodium hypochlorite to a level of 4 to 5 mg L free chlorine residual at a pH of 7 0 to 7 6 The chlorine residual must be held at 4 to 5 mg L for six hours measurable with standard com mercial water test kits If ...

Page 12: ...equipped with a two speed motor you will enjoy greater op portunityfortemperaturecontrol Whenthewatertemperaturebecomestoo cold switching the fan to half speed will cause the cold water temperature to rise stabilizing at a temperature a few degrees higher than before With a further reduction in water temperature the fan may be cycled alternately from half speed to off Do not start the motor more t...

Page 13: ...g water temperature to drop below a mini mum allowable level say 2 C to 5 C If such low temperature operation is necessary or beneficial to your process establish the minimum allowable level as follows During the coldest days of the first winter of operation observe whether any ice is forming on the louver face particularly near the bottom part of the louver face If hard ice is present on the louv...

Page 14: ...iods during subfreezing weather can cause severe damage to fans and fan cylinders Ice can accumulate inside fan cylinders at fan blade plane of rotation and fan blade tips will eventually strike this ring of ice damaging the fan blades or cylinder Ice can also accumulate on fan blades and be thrown off damaging fan cylinder or blades Allow a minimum of 10 minute delay between reverse operation and...

Page 15: ...otor Lubricate the motor according to the motor manufacturer s supplied instruc tions Sealed bearing motors do not require lubrication maintenance Refer to motor nameplate to determine if grease type and amount are specified Remove any oil dust or scale deposits from the motor which can cause ex cessive insulation temperatures Refer to Marley Fan Motor User Manual Z0239042 for additional main tena...

Page 16: ...work from a relatively constant level of concentra tions Thisstabilizationofcontaminantconcentrationsisusuallyaccomplished by blowdown which is the constant discharge of a portion of the circulating water to waste As a rule acceptable levels on which to base a treatment schedule are in the range of 2 4 concentrations The following table gives approximate blowdown rates percent of total water flow ...

Page 17: ...ior to startup See Tower Startup section of this manual Cooling towers must be cleaned and disinfected regularly in accordance with local public health services and recommendations Workers performing decontamination procedures must wear personal protective equipment PPE as directed by their facility safety officer Cooling towers must be visually inspected regularly to assess signs of bacterial gro...

Page 18: ...tem is to be shut down for an extended period of time it is recommended that the entire system cooling tower system piping heat exchangers etc be drained Leave the basin drain open During shutdown follow recommendations in the Cooling Tower Inspection and Maintenance section of this manual before attempting repairs Apply protective coating as required to all metal parts Pay particular attention to...

Page 19: ... windings and lubricate bearing surfaces Refer to Marley Fan Motor User Manual Z0239042 At start of new operating season make sure bearings are adequately lubri cated before returning motor to service Does not apply to motors with sealed bearings Prolonged Shutdown If shutdown period is longer than seasonal contact your Marley Sales Rep resentative for additional information Whenever you order par...

Page 20: ...e to proper lubricant See motor manufacturer s instructions One phase open Stop motor and attempt to start it Motor will not start if single phased Check wiring controls and motor Poor ventilation Clean motor and check ventilation openings Allow ample ventilation around motor Winding fault Check with Ohmmeter Bent motor shaft Straighten or replace shaft Insufficient grease Remove plugs and regreas...

Page 21: ... T2 T3 and T8 and insulate 3 Connect T4 T5 and L2 and insulate Low Voltage 1 Connect T2 T3 T8 and L1 and insulate 2 Connect T2 T4 T5 and L2 and insulate With Thermal Overload Fractional hp High Voltage 1 Insulate P2 2 Connect T2 T3 and L8 and insulate 3 Connect T4 T5 and L2 and insulate 4 Connect P1 and L1 and insulate P1 L1 T2 T3 T4 T8 T5 L2 T2 T1 L1 T2 T3 T4 T8 T5 L2 T2 T2 T3 T4 T8 T5 L2 P1 L1 ...

Page 22: ...e T6 Red T3 Orange P1 No Color Assigned T4 Yellow P2 Brown To reverse rotation interchange leads T5 and T8 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 1 Three Wire Single Voltage Motors Le...

Page 23: ...ngle Winding Consequent Pole Variable Torque Motor Leads are marked 1 2 3 4 5 and 6 or T1 T2 T3 T4 T5 or T6 T4 T1 T6 T2 T5 T3 T4 LOW SPEED T5 T6 T1 T2 T3 T1 T2 T3 T6 T4 T5 L1 L2 L3 L1 L2 L3 HIGH SPEED NAMEPLATE Voltage L1 L2 L3 Tie Together Low T1 T7 T2 T8 T3 T9 T4 T5 T6 High T1 T2 T3 T4 T7 T5 T8 T6 T9 Voltage L1 L2 L3 Tie Together Low T1 T7 T6 T2 T8 T4 T3 T5 T9 High T1 T2 T3 T4 T7 T5 T8 T6 T9 Spe...

Page 24: ...TS RESERVED In the interest of technological progress all products are subject to design and or material change without notice SPX COOLING TECHNOLOGIES UK LTD 3 KNIGHTSBRIDGE PARK WORCESTER WR4 9FA UK 44 1905 750 270 ct fap emea spx com spxcooling com Aquatower US E R MAN UAL ...

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