Marley Aquatower 490A, User Manual

Page 1: ... V iÊNÊ Ê ÀÞÊ ÊNÊ À iÞ Ê iV ià Marley Aquatower Cooling Tower User Manual 01 1248D ...

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Page 3: ...ortant information concerning the life of the product 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 Indicatesspecialinstructionsoninstallation operationormaintenance which are important but not related to personal injury hazard...

Page 4: ...te so there is free air flow to and from the tower Allow clearance on all sides for maintenance Indoor Installation 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 0 10 inches H2 O To minimize pressure losses Use 20 oversize ducts Avoid sharp turns or abrupt changes in size Keep duct ...

Page 5: ...inimize 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 preferably in the hot water line near the top of the tower so that water will flow through the line whenever the pump is operating Blowdown is the continuous removal of a small amount of water du...

Page 6: ...ion should be used for gravity 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 Aquatowerswithfactory installedcontrolsshipwiththemotor sheave belt andbeltguardfactory installed Removeshippingstiffenerplate and hardware at the adjustable end of the motor support plate and procee...

Page 7: ... motor shaft to prevent shaft corrosion 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 2 A plumb line will be helpful in aligning sheaves See Figure 3 6 Remove the fan guard and fan cylinder splice plate Series 4900 only at the top of the fan cylinder Install the belt over the fan ...

Page 8: ...ide will have a slightbow Ifpossible useacommerciallyavailabletensionmeasuring device Avoid 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 2 9 Install fan cylinder splice plate and fan guard 10 Check bearing housing oil cup level Fill to the proper level with SAE 30 ISO 100 w...

Page 9: ... cause fuses breakers or O L s to operate and will decrease motor life 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 All two speed starters must have a 20 second time delay relay when switching from high speed to low spee...

Page 10: ...it from these advantages it is important that the drive be installed correctly MarleysuppliesVFDandVFDcontrolsspecificallydesignedforourcooling products If you have purchased a Marley VFD and or controls package please follow the instructions in the 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 d...

Page 11: ...tional 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 4 shows one possible control scheme Other various wir ing diagrams appear on pages 20 thru 22 Installation L1 L2 L3 M M M STOP START M M OL 2 WIRE CONTROL IF USED NOTE L3 IS USED ON 3 PHASE MOTOR ONLY MOTOR Figure 4 Note ...

Page 12: ...d 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 100 and 300 ppm expressed as CaCO3 If tower is equipped with a standard side suction connection vent any accumulated air from the top of the suction hood by removing one or both tap screws provided at that location Replace these tap screws when ...

Page 13: ...be held at 4 to 5 mg L ppm for six hours measurable with standard commercial water test kits 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 circulat ing stagnant water over the cooling tower fil...

Page 14: ...es as appropriate for protection against edges of thin gage material Motor Lubricate the motor according to the motor manufacturer s supplied in structions Remove any oil dust or scale deposits from the motor which can cause excessive insulation temperatures RefertoElectricMotorsonCoolingTowers Manual92 1475 foradditional maintenance and lubrication information Fan Shaft Bearing Housing Check bear...

Page 15: ...eave and belt alignment x Check belt tension and condition x x Check sheave bushing fastener torque x Fan Check and tighten blade and hub fasteners x Check fan blade pitch and tip clearance x Check fan cylinder for loose fasteners x Motor Lubricate grease as required R Check mounting bolts for tightness x Operate at least 3 hours a month 3 hours a month 3 hours a month Basin Heater if equipped Che...

Page 16: ...perating Instructions on page 12 A visual inspection should take place at least once a week during the operating season Inspect for bacterial growth and general operation conditions Bacterial growth should be reported to your water treatment expert for immediate attention At a minimum cooling towers should be cleaned and disinfected with biocides twice a year Systems with biofoul ing or positive c...

Page 17: ...eve those concentrations at various cooling ranges Maintenance Note Blowdown Rate Cooling Two Four Range F Concentrations Concentrations 10 0 7 0 17 15 1 1 0 30 20 1 5 0 43 Range is the difference between hot water temperature entering the tower and cold water temperature leaving the tower When water treatment chemicals are added they should not be in troduced into the circulating water system via...

Page 18: ...line and fill line and oil cup Fan guard will have to be removed to change oil Each month check the oil level at the oil cup Electric Motor Clean and lubricate motor at close of each operating season Refer to motor manufacturer s recommendations Do not start motor before determining that there will be no interfer ence with free rotation of the fan drive The motor should be run for three hours at l...

Page 19: ...lugs and regrease bearings Limit cumulative starting time to a total of 30 seconds each hour Flush bearings and relubricate Replace bearings Tighten all bolts and cap screws on all mechanical equipment and supports Replace bearings Replace shaft Make sure fan and motor are straight and properly aligned Check belt for proper tension Disconnect load Remove sheave tape key in keyway and operate motor...

Page 20: ... L1 and insulate 2 Connect 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 ...

Page 21: ... Black T2 White 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 Vol...

Page 22: ...ingle Winding Consequent Pole Variable Torque Mo tor Leads are marked 1 2 3 4 5 and 6 or T1 T2 T3 T4 T5 or 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 Spee...

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Page 24: ... 2 7 5 5 7 0 2 7 5 5 7 0 2 7 5 5 7 0 2 7 t a o l F c i t s a l P 0 8 6 0 2 7 0 8 6 0 2 7 0 8 6 0 2 7 0 8 6 0 2 7 0 8 6 0 2 7 0 8 6 0 2 7 r e b m u N l e d o M A 4 9 4 B 4 9 4 C 4 9 4 A 5 9 4 B 5 9 4 A 6 9 4 B 6 9 4 8 2 1 A 2 4 3 2 6 1 2 4 3 2 6 1 2 6 3 1 A 2 3 7 6 4 2 D 6 3 1 B 0 4 5 9 1 D 0 4 5 9 1 D 0 4 1 B 2 4 4 3 2 3 B 4 4 3 2 3 B e v a e h S r o t o M 5 0 2 6 6 2 4 6 6 4 2 D 4 9 5 9 1 D 6 4 2...

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Page 26: ...h 3 2 2 7 0 3 2 r e b m u N l e d o M A 4 9 4 B 4 9 4 C 4 9 4 A 5 9 4 B 5 9 4 A 6 9 4 B 6 9 4 e l c y C 0 5 r o t o M m a r F T 2 8 1 m p r 0 0 5 1 0 8 3 0 2 2 0 5 3 p h 2 4 7 9 3 2 2 e m a r F T 2 8 1 m p r 0 0 5 1 0 8 3 0 2 2 0 5 3 p h 3 2 2 7 0 3 2 e m a r F T 3 1 2 m p r 0 0 5 1 0 8 3 0 2 2 0 5 3 p h 5 6 5 0 3 3 2 6 5 0 3 3 2 7 O 6 5 e m a r F T 5 1 2 m p r 0 0 5 1 0 8 3 0 2 2 0 5 3 p h 5 7 2 ...

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Page 28: ... 664 7400 spxcooling ct spx com www spxcooling com In the interest of technological progress all products are subject to design and or material change without notice 2007 SPX Cooling Technologies Inc Printed in USA Balcke Hamon Dry Cooling Marley Cooling Technologies ...