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My fan isn't moving as much air as it should. What do I do?
Belt-Drive Sidewall Propeller Fans
a) Check to make sure the belt is positioned properly. If belt is slipping, adjust tension and match belt to pulley. b) Verify that the damper is open. c) Check that the drive combination is correct.
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Why is my fan moving more air than I anticipated?
Belt-Drive Sidewall Propeller Fans
You may have miscalculated your system's static pressure. Check calculation and adjust pulleys to more turns open.
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Why is my fan not working?
Belt-Drive Sidewall Propeller Fans
a) There may be a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Fan my be incorrectly wired. Shut power OFF and check wiring for proper connections. d) The pulleys may be out of alignment or loose. Check alignment and tighten. e) The electricity may be turned off. Contact local power company.
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Why is my fan so noisy?
Belt-Drive Sidewall Propeller Fans
a) The bearings may be loose or defective. Tighten or replace bearings. b) There may be foreign material inside your bearings. Replace bearings. c) The motor pulley and/or fan pulley is not tightened on the shaft. Check alignment and tighten setscrews and/or bushings. d) The propeller may be loose. Tighten set screws or taper bushing screws. e) The belt tension may be too loose or too tight. Adjust belt tension. f) Belts may be worn, oily or dirty. Clean or replace belts. g) The pulleys may not be aligned correctly. Re-align pulleys. h) The propeller may be crooked or damaged. Replace propeller. i) The fan may not be securely anchored to the wall. Secure properly. j) The fan shaft may be bent. Replace shaft and propeller. k) The fan propeller may be out of balance. Replace propeller.
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Why is my fan supplying air rather than exhausting? Or vice versa?
Belt-Drive Sidewall Propeller Fans
a) The propeller rotation may be reversed. Reverse motor rotation by rewiring the motor. b) The fan may have the incorrect propeller. Verify pitch of prop is correctly positioned for the application.
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Why is my motor overloading and shutting off?
Belt-Drive Sidewall Propeller Fans
a) The propeller RPM may be too high. Check that the drives are correct, increase turns open on VP pulley. b) The motor may have a shorted motor winding. Replace motor. c) The propeller may be rotating in the wrong direction. Check that motor is wired correctly. d) The power source may be over/under line voltage. Contact your local power company. e) The belt may be slipping. Tighten belt, match belt to pulley.
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