Marley Ultra Quiet Cooling Tower Fan user manual
Contents
1. eX WHERE IDEAS MEET INDUSTRY Marleu Ultra Quiet Fan DESIGNED FOR INDUCED DRAFT COOLING TOWER APPLICATIONS M2012 1165 ISSUED 8 2012 READ AND UNDERSTAND THIS MANUAL PRIOR TO OPERATING OR SERVICING THIS PRODUCT gt Marley A Warning safety and handling considerations Safety Because of the potential for property damage and or danger to person s it is critical to follow the proper selection installation and operating procedures Exposed rotating devices are potentially dangerous and can cause injury or death They must be guarded in compliance with OSHA ANSI and all other local standards for the specific application All personnel must follow applicable work safety standards such as Lockout Tagout procedures while working in or around power transmission devices Handling Considerations 1 Marley Ultra Quiet Fans are designed and manufactured to be very durable They can provide years of service if handled properly 2 Minor aesthetic imperfections such as surface abrasions or scuffs may be present from manufacturing or handling and will not affect performance Heavy concentrated impacts may cause gouges penetration or dents in the blades If any damage is observed the fan should not be placed into service Only SPX Cooling Technologies Inc Engineering is authorized to evaluate any issues exceeding the above description of minor aesthetic imperfections 3 The entire fan assembly should be inspected2. periodically or after any changes to the drive system components fan components Fan Hub Fan Blade Direction of Rotation 3 Trailing a Edge Leading Edge Figure 1 Typical Fan Assembly Order No Trial Pitch Angle Final Pitch Angle Speed rpm Contract hp fan assembly instructions The following instructions apply to installations having straight bores or Note tapered output shafts without split taper bushings It is convenient to preassemble the fan prior to installation on the driving shaft Marley Ultra Quiet fans are statically balanced as a complete assembly However the fan may be shipped unassembled To ensure proper re assembly blades and hubs are match marked 1 Select a large open area corresponding to the fan diameter 2 Position the fan hub in the center of the work area with the hub taper down See Figure 1 Proper installation with particular attention to tightening nuts to Note the specified torque is essential to maintain the design integrity of these units 3 Install one blade with the trailing edge curved up Clean any dirt or grease from the rod end and the surfaces of the resilient mounts Align the rod end hole with the holes in the resilient mounts and insert the blade mounting bolt first through the resilient mount with the recess to accept the bolt head then through the rod end hole See Figure 2 below Screw the bolt into the second resilient mount light
3. are subject to design and or material change without notice ISSUED 8 2012 M2012 1165 COPYRIGHT O 2012 SPX Corporation Marleu Ultra Quiet Fan DESIGNED FOR INDUCED DRAFT COOLING TOWER APPLICATIONS
4. en loosen the clamp nut so that the rod end can be rotated in the hub tube One complete revolution will increase or decrease the radius of the fan by 079 2mm Take care that the clevis is returned to the exact factory set angle unless it is intended that the blade loading be changed as discussed in the previous section A match mark may be made at a point on the threads and the tube before turning to assure that exactly one revolution is made Tighten the clamp nut to 200 ft Ibs 271 N m Maximum adjustment possible is about 0 75 19mm radially 1 1 2 on diameter At least 1 1 2 38mm of rod end threads must remain in the tube rod end threads must fully engage tube threads Repeat adjustment for all fan blades so that the tip clearance is within the listed range Fan Diameter ft A 5 3 8 10mm 5 1 2 3 8 10mm 6 3 8 10mm 7 7 16 11mm 9 1 2 13mm 10 5 8 16mm 11 5 8 16mm 12 11 16 17mm A 1 8 3mm Fan Cylinder N Fan Blade 11 12 fan maintenance and service Maintenance Preventative maintenance will prolong useful life and assure continued trouble free operation After the first week and subsequently at six month intervals Torque all hardware to specifications referenced in this manual e Visually inspect the fan for airborne debris damage contact with fan cylinder segments and corrosive attack Correct any situations determined detrimental to fan operation e Remove any accum
5. f air through the center of the fan to maximize the fan s efficiency See Figure 5 on following page 1 Locate the air seal installation hardware in the plastic bag taped to one of the hub tubes 2 Install the air seal studs on the appropriate side of the hub tube air seal may be installed on either side of hub Finger tighten 3 Place one resilient washer on each stud as shown in Figure 6 on following page 4 Place the air seal onto the studs and install the remaining hardware following the sequence shown in the drawings Do not lubricate this end of the studs 5 Note that the diameter ofthe resilient washers before they are compressed is slightly less than the diameter of the aluminum washer Tighten each nut until the resilient washer s diameter is the same as the aluminum washer Do not over tighten Over tightness exists when the resilient washer has expanded in diameter larger than the diameter of the aluminum washer fan installation instructions continued Air Seal Disc Figure 5 Assembled Ultra Quiet Fan Aluminum Nut Bos Aluminum Washer Resilient Washer NT Air Seal Disc L Resilient Washer In m Bi Air Seal Stud Figure 6 Air Seal and Hardware Items A Caution Figure 7 Pitch Measurement Location 10 adjust blade angle if required Hubs are shipped from the factory with the rod end set for the blade angle indicated by the design performance A change in blade angle is s
6. haft 5 Raise the fan assembly above the shaft and slowly lower the hub onto the shaft with the keyways aligned Make certain the key does not slide down during installation 6 Tighten 2 set screws to 30 ft lb 41 N m over key Fan Retention Bolt IL Retention Washer Hub shown without blade spokes for simplicity Set Screws Key Fan Shaft fan installation instructions continued 7 Install the hub retention cap screw with lock washer Torque hub retention cap screw to 50 ft lb 68 N m If the standard hub retention cap screw is too short locate longer cap screw in the Fan Retention Hardware Kit along with new retention washer 8 After installing the fan manually rotate it while moving the blade tips up and down to be sure they clear the ring or throat at all points When a blade is held in alignment with the blade tube that is straight outward from the hub it should clear the fan ring by a distance adequate to provide for any relative motion between the fan wheel and the ring Excess clearance between the blade tips and the ring however should be avoided to prevent backflow which seriously reduces fan efficiency If clearance is excessive the diameter may be adjusted at this time See adjust diameter section on page 11 9 Install air seal per instructions below Air Seal Installation The air seal disc is a thin sheet metal disc The installation of this disc is required to prevent the back flow o
7. imated sine wave Instruments capable of measuring a squared Off wave form accurately should be used for measuring power in this situation Do not start the motor more than four to five times per hour each low speed start and each high speed start count as one start 13 parts list Dwg Description No 1 16MM ALUMINUM NUT 2 ALUM FLAT WASHER 3 5 8 RESILIENT WASHER 4 16MM AIR SEAL STUD 5 ALUMINUM BLADE BOLT 9 14 FAN DIA 5 ALUMINUM BLADE BOLT 5 8 FAN DIA 6 CLEVIS CLAMP BOLT 9 14 FAN DIA 6 CLEVIS CLAMP BOLT 5 8 FAN DIA 7 SS FLAT WASHER 9 14 FAN DIA 7 SS FLAT WASHER 5 8 FAN DIA 8 CLEVIS CLAMP NUT 9 14 FAN DIA 8 CLEVIS CLAMP NUT 5 8 FAN DIA 9 MAG ROD END 9 14 FAN DIA 9 MAG ROD END 5 8 FAN DIA 10 MAG CLEVIS CLAMP 9 14 FAN DIA 10 MAG CLEVIS CLAMP 5 8 FAN DIA 11 GRDR 2000 SHAFT ADAPTOR 11 GRDR 2200 SHAFT ADAPTOR 11 GRDR 2400 SHAFT ADAPTOR 11 GRDR 3000 SHAFT ADAPTOR 12 1 5 SS SHOULDER BOLT 6 13 SS SET SCREW 2 9 14 FAN DIA 14 SS SET SCREW 2 5 8 FAN DIA When ordering parts always provide the cooling tower serial number and when possible the fan serial number from a decal located on the fan hub WHERE IDEAS MEET INDUSTRY SPX COOLING TECHNOLOGIES INC 7401 W 129 ST OVERLAND PARK KANSAS USA P 913 664 7400 F 913 664 7439 spxcooling spx com spxcooling com In the interest of technological progress all products
8. ly A 3 4 drive torque wrench with a short extension may be used The blade mounting bolt is supplied from the factory with grease on the threads and conical face Do NOT clean the grease from the bolt gt Resilient Mount Mounting Bolt Figure 2 Blade Installation Rod End 4 Complete the installation of one blade by holding it so thatthe blade extends straight out from the hub tube Holding the blade in this position tighten the bolt using a torque wrench set to 200 ft Ib 271 N m making sure the rod end and the resilient mounts seat m fan assembly instructions continued Figure 3 Completed Blade Connection 5 Install the rest of the blades so that they are identical with the first blade See Figure 3 above for completed blade connection Torque all bolts to 200 ft Ibs 271 N m If blades are installed properly they will return to their undisturbed position if the tips are pressed in the axial direction with moderate force 10 to 20 Ib Figure 4 Hub to Shaft Assembly fan installation instructions refer to Figure 4 1 Be sure motor is locked out 2 Clean the hub bore and driving shaft extension for the full length of the key 3 Insert the key in the keyway The top of the key must be below the top of the shaft by not more than 1 8 3mm The key is a tight fit across the width and must never be altered 4 After cleaning apply a coat of anti seize compound to the engagement portion of the s
9. ometimes necessary however to adjust to actual site conditions Failure to adjust the blade angle when required may result in blade overload To adjust loosen the clamp nut Just enough to allow the blade to be turned Place an inclinometer on the flat surface of the root section as shown below in Figure 7 Turn the blade until the desired angle is achieved Make a permanent record of the final angle selected and take care that all blades on the fan are set at the same angle A typical adjustment may be 3 The fan is designed to consume the horsepower stated on the Fan Specification Sheet Too great an increase in blade angle can cause serious blade overload which will stall the blades In this condition the fan will actually deliver less air and blade life may be shortened The maximum recommended blade angle is 30 Retighten the clamp nut to 200 ft Ibs 271 N m Recheck each blade angle after tightening Clamp Nut Heavy dotted line indicates location for measuring blade angle Table 1 Blade Tip Clearance Figure 8 Blade Tip Clearance adjust diameter if required At times it may be necessary to adjust the fan diameter to suit a particular fan cylinder ring The tip clearance of the blades should be in the range of the fan diameter as listed in Table 1 below Use Figure 8 for reference If the tip clearance is found to be outside of this range the fan diameter can be adjusted First remove the fan blade Th
10. ulated scale or dirt Clear blade drain holes at fan tip Service Proper identification of your fan is necessary to ensure you receive correct replacement parts The Marley cooling tower serial number can be used to determine the fan and any components installed and maintained as original equipment on a Marley cooling tower Please provide the Marley sales representative the necessary information when ordering replacement fans or components Replacement of individual fan blades may require rebalancing the entire fan If rebalancing is desired contact the Marley sales representative in your area motor load The corrected horsepower should be close to but not exceed the contract horsepower specified by SPX Cooling Technologies Inc Determine corrected horsepower using the following equation Actual volts and amperage must be obtained with the fan running and the specified rate of water flowing over the tower after the motor and drive system have reached operating temperature approximately 30 minutes of operation VOLTS x AMPS x DENSITYD C VOLTSy x AMPSy x DENSITY PN HPc Corrected Horsepower VOLTSN Nameplate Volts VOLTS Actual Volts AMPSN Nameplate Amperage AMPSA Actual Amperage HPN Nameplate Horsepower DENSITYA Actual Air Density DENSITYp Design Air Density Measurements taken on motors operating with Variable Frequency Note Drive controls may read up to 15 high from errors in measuring the approx
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