WIRING
Make sure that the fan is wired properly and the motor is running in the proper direction. Damage caused to
motors by improper wiring will not be covered in the warranty. Wiring diagrams for most of the motors supplied on
our fans are located on page in this manual. There should also be a wiring diagram on each motor plate. If you do
not have the proper diagram, please contact the factory with the motor brand and model number and we will send
a copy of the diagram to you.
PRE-OPERATION INSPECTION
With the fan mounted in operating position:
1. Lock out electrical power to prevent accidental fan operation.
2. Recheck tightness of foundation bolts, wheel setscrews, motor mounting bolts, bearing bolts and setscrews,
coupling setscrews, access door bolts, etc. Tighten to proper torque values if necessary. NOTE: Fan hub
setscrews should be tightened when vertically below the shaft.
3. Rotate wheel manually to make sure it runs freely without binding or striking the inlet or housing. If the wheel
strikes the housing, the wheel may have to be moved on the shaft.
4. Check bearing alignment and make certain they are properly locked to the shaft and lubricated if applicable.
5. If fan is belt driven, check sheave alignment. Improper sheave alignment is one of the most frequent causes
of excessive fan vibration. Check belt tension. Belt tension is the usual cause of shortened belt bearing life.
6. If equipped with inlet vanes and/or dampers, check for correct linkage operation. Make sure that the operator
opens and closes these control devices to the proper position.
7. If this product was furnished with a motor mounted by the factory, refer to and observe the motor
manufacturer's instructions attached to the fan before removing the electrical lockout of the power source.
START UP
Check the correct direction of rotation by "hitting" the ON button and then the OFF button. Correct the rotation if
necessary and the unit can be put into service. Keep a close watch for any unusual vibration, noise, etc.
If you observe any unusual vibration or noise, stop and lockout the unit and recheck all items in the preoperation
inspection check list above before requesting assistance from our factor representative.
After 24 hours of satisfactory operation, shut down the equipment and check all foundation bolts and setscrews
for looseness, tightening where required.
SOME CAUSES OF VIBRATION
1. Bearings: Misaligned or worned loose bolts or setscrews.
2. Motor: Misaligned or unbalanced, worn bearings, loose bolts or setscrews.
3. Bent shaft: Equipment dropped during shipment or installation.
4. Coupling: Misaligned
5. Loose foundation mounting bolts.
6. Wheel: Loose setscrews, material accumulation or wear and erosion causing imbalance.
7. Fan inlet or outlet volume control devices completely closed off.
8. External source of transmitted vibration.
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CAR-MON PRODUCTS, INC.
1225 Davis Road, Elgin, IL 60123 Phone (847) 695-9000
Web Site: www.car-mon.com e-mail: [email protected]
