ultra quiet fan - SPX Cooling Technologies
Contents
1. SET SCREWS KEY FAN SHAFT Figure 4 installation 7 Install the hub retention bolt with the lock washer and torque to 68 N m If the standard hub retention bolt is too short locate a longer one in the fan retention hardware kit 8 After installing the fan manually rotate it while moving the blade tips up and down to be sure they clear the cylinder ring or throat at all points When a blade is held in alignment with the blade tube i e straight outward from the hub it should clear the fan cylinder by a distance adequate to provide for any relative motion between the fan and the cylinder Excess clearance between the blade tips and the cylinder should be avoided to prevent backflow which seriously reduces fan efficiency Correct blade tip clearance dimensions are shown in Table 1 on page 11 9 Install the air seal Air Seal Installation The air seal is a thin sheet metal disc that is required to prevent the back flow of air through the center of the fan to maximize the fan s efficiency See Figure 5 1 Locate the air seal installation hardware 2 Install the air seal studs on the hub tube finger tighten 3 Place one resilient washer on each stud as shown in Figure 6 4 Place the air seal onto the studs and install the remaining hardware following the sequence shown Do not lubricate the studs 5 Note that the diameter of the resilient washers before they are compressed is slightly less than the diam2. TIP CLEARANCI 3mm FAN CYLINDER FAN BLADE RING maintenance Maintenance Preventative maintenance will prolong useful life and assure continued trouble free operation After the first week and subsequently at six month intervals Check all hardware torque to specifications referenced in this manual Visually inspect the fan for airborne debris damage contact with fan cylinder segments and corrosive attack Correct any situations determined detrimental to the fan operation Remove any accumulated scale or dirt Clear the blade drain holes at the 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 Note motor load The corrected fan motor kW should be close to but not exceed the contract kW specified by SPX Cooling Technologies Determine corrected kW 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
3. and drive system have reached operating temperature approximately 30 minutes of operation VOLTS x AMPS x DENSITYp C VOLTS x AMPS x DENSITY YN kWc Corrected Kilowatt VOLTSN Nameplate Volts VOLTS Actual Volts AMPSN Nameplate Amperage AMPSA Actual Amperage HPN Nameplate Kilowatt DENSITY Actual Air Density DENSITYp Design Air Density Measurements taken on motors operating with Variable Frequency Drive controls may read up to 15 high from errors in measuring the approximated 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 parts list A i 1 15 10 10 11 11 11 11 12 13 14 ALUMINUM NUT ALUMINUM FLAT WASHER RESILIENT WASHER AIR SEAL STUD ALUMINUM BLADE BOLT 2 7 3 6 FAN DIA ALUMINUM BLADE BOLT 1 5 2 4 FAN DIA CLEVIS CLAMP BOLT 2 7 4 3 FAN DIA CLEVIS CLAMP BOLT 1 5 2 4 FAN DIA FLAT WASHER 2 7 4 3 FAN DIAMETER FLAT WASHER 1 5 2 4 FAN DIAMETER CLEVIS CLAMP NUT 2 7 4 3 FAN DIAMETER CLEVIS CLAMP NUT 1 5 2 4 FAN DIAMETER ROD END 2 7 4 3 FAN DIAMETER ROD END 1 5 8 FAN DIAMETER CLEVIS CLAMP 2 7 4 3 FAN DIAMETER CLEVIS CLAMP 1 5 2 4 FAN DIAMETER GEAREDUCER 2000 SHAFT ADAPTOR GEAREDUCER 2200 SHAFT ADAPTOR GEAREDUCER 2400 SHAFT ADAP
4. TOR GEAREDUCER 3000 SHAFT ADAPTOR 1 5 SHOULDER BOLT 6 SET SCREW 2 2 7 4 3 FAN DIAMETER SS SET SCREW 2 1 5 2 4 FAN DIAMETER When ordering parts always provide the cooling tower serial number and if possible the fan serial number located on the fan hub ultra quiet fan USER MANUAL SPX COOLING TECHNOLOGIES UK LTD 3 KNIGHTBRIDGE PARK WAINWRIGHT ROAD WORCESTR WR4 OFA UK P 44 1905 750 270 F 44 1905 750 299 info uk spx com In the interest of technological progress all products are subject to design and or material change without notice ISSUED 03 2015 uk_Z0414808 rev A COPYRIGHT 2015 SPX Corporation
5. ce Do not remove the grease from the bolt ail RESILIENT MOUNT MOUNTING BOLT 4 Complete the installation by holding the blade so that it extends straight out from the hub tube While holding the blade in this position tighten the bolt to 200 ft lb 271 N m making sure the rod end and the resilient mounts seat Ia assembly Figure 3 5 Install the other blades See Figure 3 for completed blade connection All bolts should be tightened to 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 5 to 10 kg installation 1 Be sure the fan motor is locked out 2 Clean the hub bore and drive fan 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 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 shaft 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 two set screws to 41 N m over key 7 Installation is applicable to the fan being installed on a gear drive Note or belt drive fan shaft FAN RETENTION BOLT RETENTION LOCK waster HUB SHOWN WITHOUT BLADES
6. components FAN HUB FAN BLADE DIRECTION OF i j ROTATION i TRAILING 7 EDGE LEADIN EDGE Figure 1 Order No Trial Pitch Angle Final Pitch Angle Speed rpm Contract hp Note Note Figure 2 assembly The following instructions apply to installations having straightbores or tapered output shafts without split taper bushings It is convenient to preassemble the fan prior to installation Ultra Quiet fans are statically balanced as a complete assembly and shipped unassembled To ensure proper reassembly 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 assembly with particular attention to tightening hardware to the specified torque is essential to maintain the design integrity of the fan 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 Screw the bolt into the second resilient mount lightly A drive torque wrench with a short extension may be useful The blade mounting bolt is supplied from the factory with grease on the threads and conical fa
7. eter of the aluminum washer Tighten each nut until the resilient washer s diameter is the same as the aluminum washer Do not over tighten installation AIR SEAL DISC Figure 5 ALUMINUM NUT ALUMINUM WASHER RESILIENT WASHER BEE AIR SEAL DISC RESILIENT WASHER AIR SEAL STUD HUB TUBE E Figure 6 A Caution Figure 7 blade pitch adjustment Hubs are shipped from the factory with the rod end set for the blade angle pitch required for design performance A change in blade angle is sometimes necessary 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 blade as shown in Figure 7 Turn the blade until the desired angle is achieved Make a permanent record of the final angle selected and make sure that all blades 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 stallthe blades In this condition the fan will actually deliver less air and blade life may be compromised The maximum recommended blade angle is 30 Retighten the clamp nut to 136 N m for fan diameters 2 44m and smaller or 271 N m for fan diameters 2 74m and larger Recheck blade angles after ti
8. ghtening FLAT SURFACE OF THE BLADE CLAMP NUT HEAVY DOTTED LINE INDICATES LOCATION FOR MEASURING THE BLADE ANGLE Table 1 Figure 8 blade tip clearance adjustment It may be necessary to adjust the fan diameter to suit a particular fan cylinder ring See Figure 8 The tip clearance of the blades should be in the range of the fan diameter listed in Table 1 If the tip clearance is found to be outside of this range the fan diameter can be adjusted First remove the fan blade and 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 2mm Take care that the clevis is returned to the exact factory set angle unless it is intended that the blade pitch 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 136 N m for fan diameters 2 44m and smaller or 271 N m for fan diameters 2 74m and larger Maximum adjustment possible is about 19mm radially 88mm on diameter At least 38mm of rod end threads must remain in the tube rod end threads must fully engage tube threads Repeat for all fan blades so that the tip clearance is within the listed range Fan Diameter Blade Tip Clearance 1 52m 10mm 1 71m 10mm 1 83m 10mm 2 13m 11mm 2 74m 13mm 3 05m 16mm 3 35m 16mm 3 66m 17mm gt BLADE
9. ultra quiet fan INSTALLATION OPERATION MAINTENANCE uk_Z0414808 revA ISSUED 03 2015 READ AND UNDERSTAND THIS MANUAL PRIOR TO OPERATING OR SERVICING THIS PRODUCT gt Marley 4 Warning safety and handling Safety Because of the potential for property damage and or danger to personnel 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 and 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 inspected periodically or after any changes to the drive system components
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