Greenheck Fan Hooded Propeller Roof Fans User's Manual
Contents
1. the supply wiring must be properly fused and conform to local and national electrical codes If the electrical supply is to be routed to the fan from the interior of the building it should pass through the conduit hole in the fan panel The supply wires are then connected to an optional safety disconnect switch if supplied or wired directly to the motor PRESTARTING CHECKS Check all fasteners and set screws for tightness This is especially important for bearing set screws The propeller should rotate freely and not rub on the fan panel venturi Rotation direction of the propeller should be checked by momentarily turning the unit on Rotation should be in the same direction as the rotation decal affixed to the unit or as shown in Fig 2 For 3 phase installations fan rotation can be reversed by m simply interchanging any two of the three electrical leads For single phase Airflow Airflow J installations follow the wiring diagram located on the motor Rotation Rotation _m _m FOR BELT DRIVE FANS The adjustable motor pulley is preset at the factory for the specified fan RPM Fan speed can be increased by closing or decreased by opening the adjustable pulley Two or three groove variable pitch pulleys must be adjusted an equal number of turns open Any increase in fan speed represents a substantial increase in horsepower Fig 2 required from the motor Always check motor load amperage and compare to name plate rating2. 671 4 403 4 124x123 60 621 2 72 8212 29 53 24 70 41 1136x135 72 741 Filtered Supply Belt Drive Sizes Only 20 72 Saye Standard Tall Damper Roof Size Base Base Base WxL Size as sa es gt 1 Sa oT e a S a a EREZA 29 11 461 281 4 66x63 24 261 2 ao tn o TC 36 4614 22 391 2 171 2 563 4 34 94x87 36 381 2 42 524 24 421 2 181 2 593 4 353 4 93x99 42 441 2 48 584 24 431 2 191 2 60 363 4 112x111 48 501 2 54 64 4 261 2 49 221 2 661 4 393 4 124x123 54 561 2 60 70 261 2 50 23V2 671 4 403 4 136 x 135 60 6212 72 8212 29 53 24 70 41 4 136x147 72 74 Access to the motor compartment On fan sizes 18 to 48 Remove two fasteners shown in fig 1 Carefully swing the hood 180 degrees and let it rest on the roof If desired the entire hood may be removed by removing the two additional fasteners on the opposite side of the fan Use caution when handling the hood in strong winds On fan sizes 36 to 60 access to the motor compartment can also be made by either Removing birdscreen or filters and standing under the hood of large fans Removing one interlocking hood end section of Fasteners smaller units ELECTRICAL CONNECTIONS Before electrical connections are made the supply voltage phase and ampere capacity must be checked for compatibility with the fan motor In addition
3. READ AND SAVE THESE INSTRUCTIONS Part 455305 GREENHECK Hooded Propeller Roof Fans a BOX 410 ee Belt Drive and Direct Drive Installation Operating and Maintenance Manual Upon receiving the unit check for any damage and report it immediately to the shipper Also assure all accessory items are accounted for To minimize installation time most fans are shipped completely assembled Due to shipping size limitations hoods for larger fans will be shipped in sections For these fans the hood and fan components can be transported to the roof location separately Hood assembly should begin after the fan is attached to the roof curb Hood assembly instructions are included with the hood components Care must be taken not to bend or distort the fan panel or drive components during installation All dimensions given in inches Exhaust Supply Direct Drive Sizes 18 54 Belt Drive Sizes 20 72 Standard Tall Damper Roof Base Base WxL Size Opg za Beal Sq oe 40 4 2714 48x51 18 20 Panera eee oe ee ee 34 4 18 29 11 46 28 66x63 24 261 401 4 61 4 40a 20 34 14 51 31 4 75x75 30 32 461 a 22 391 2 171 2 563 4 34 4 88x87 36 381 2 581 4 24 431 2 191 2 603 4 363 4 93x111 48 50 18 20 3 24 42 em 54 64 4 261 2 49 2212 661 4 393 4 112x111 54 561 2 60 70 261 2 50 23V2
4. ching the motor to the motor plate must be loosened in order to adjust the belt It is very important that the drive pulleys remain in proper alignment after adjustments are made Misalignment of pulleys will result in premature WRONG CORRECT belt wear noise vibration and power loss See Fig 4 Fia 4 ig BEARINGS For belt drive fans only Bearings are the most critical moving part of the fan and should be inspected at periodic intervals Locking collars and set screws in addition to fasteners attaching the bearings to the bearing plate must be checked for tightness In a clean environment and temperatures above 32 F below 200 F fan shaft bearings with grease fittings should be lubricated semi annually using a high quality lithium based grease If unusual environmental conditions exist temperatures below 32 F above 200 F moisture or contaminants more frequent lubrication is required With the unit running add grease very slowly with a manual grease gun until a slight bead of grease forms at the seal Be careful not to unseat the seal by over lubricating or using excessive pressure Bearings without grease fittings are lubricated for life FASTENERS AND SET SCREWS Any fan vibration has a tendency to loosen mechanical fasteners A periodic inspection should include checking all fasteners and set screws for tightness Particular attention should be paid to set screws attaching the propeller to the shaft and the shaft to the bea
5. crews and fasteners for tightness Check for worn bearing Correct propeller imbalance Check for loose dampers guards or ductwork Defective Motor Replace motor Motor load amperage must be checked and compared to nameplate rating to avoid serious damage to motor when speed is increased Reduced airflow Excessive Noise 1 Fan Panel 1 Fan Panel 2 Propeller 2 Propeller 3 Drive Frame Channel 2 3 Drive Frame Channel 2 4 Motor Plate 4 Motor Plate 5 Motor 5 Motor 6 Motor Pulley 7 Shaft Pulley 8 Fan Shaft 9 Bearings 2 10 Belt 11 Bearing Plate Level 3 fans only not shown IOM RB 10 95
6. ess to the damper is made by removing one end birdscreen or filter and working on the damper from above SEE WARNING ON PAGE 2 FILTER MAINTENANCE FILTERED SUPPLY FANS Aluminum mesh filters should be cleaned on a regular basis for optimum fan efficiency The frequency of cleaning depends upon the cleanliness of the incoming air m an To remove filters on fan sizes 24 to 30 first remove the hood as shown in fig 1 The filters can then be pulled from the slide out racks shown in photo On fan sizes 36 to 60 access panels on the end panels are provided which allow the filters to be removed without removing the hood Filters should be washed with a mild detergent in warm water After the filters are dry an adhesive spray available at most filter distributors may be applied to increase filter efficiency Sliding filter out of filter rack TROUBLESHOOTING C rom O ows O commeomwe acmon OO System resistance is too high Check backdraft dampers for proper operation Remove obstructions in ductwork Clean dirty filters Check for adequate supply air for exhaust fans or exhaust air for supply fans Bearings Tighten bearing collars and set screws Lubricate bearings Replace defective bearings V Belt drive Tighten pulleys on motor and fan shaft Adjust belt tension Align pulleys Replace worn belts or pulleys See Routine Maintenance Excessive vibration Remove dirt build up from propeller Check all set s
7. rings Loose bearing set screws will lead to premature failure of the fan shaft LUBRICATION Refer to the paragraph on bearings for bearing lubrication Many fractional horsepower motors installed on the smaller fans are lubricated for life and require no further attention Motors equipped with oil holes should be oiled in accordance with the manufacturer s instructions printed on the motor Use a high grade SAE 20 machine oil and use caution not to over lubricate Motors supplied with grease fittings should be greased according to directions printed on the motor REMOVAL OF DUST AND DIRT Dirt clogs cooling openings on the motor housing contaminates bearing lubricant and collects on propeller blades causing severe imbalance if left unchecked The exterior surface of the motor fan panel and entire propeller should be thoroughly cleaned periodically Use caution and do not allow water or solvents to enter the motor or bearings Under no circumstances should motors or bearings be sprayed with steam or water DAMPER INSPECTION AND SERVICE If an optional tall base with damper is supplied access to the optional dampers and actuators is provided by a removable door Simply release the two cam latches and slide the damper out for inspection cleaning or service For fan sizes 24 through 36 supplied without a tall base the entire unit must be lifted off the roof curb for access to the damper For fan sizes 42 through 72 suppled without a tall base acc
8. when changing fan speed ROUTINE MAINTENANCE WARNING DISCONNECT AND SECURE TO THE OFF POSITION ALL ELECTRICAL POWER TO THE FAN PRIOR TO INSPECTION OR SERVICING FAILURE TO COMPLY WITH THIS SAFETY PRECAUTION COULD RESULT IN SERIOUS INJURY OR DEATH Once the fan has been put into operation a periodic maintenance program should be set up to preserve the reliability and performance of the fan Items to be included in this program are BELTS Detiection Bet Span e BEARINGS e FASTENERS e SET SCREWS e LUBRICATION e REMOVAL OF DUST DIRT lt Belt Span gt Fig 3 BELTS Premature belt failures are frequently caused by improper belt tension either too tight or too loose or misaligned pulleys The proper tension for operating a V belt is the lowest tension at which the belts will not slip at peak load conditions For initial tensioning the proper belt deflection half way between pulley centers is 1 64 for each inch of belt span For example if the belt span is 64 inches the belt deflection should be one inch using moderate thumb pressure at midpoint of the drive Fig 3 Check belt tension two times during the first 24 hours of operation and WRONG WRONG periodically thereafter To adjust belt tension simply loosen four fasteners two on each side of the motor plate and slide the motor plate away from the fan shaft until proper belt tension is attained On some fans fasteners atta
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