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My ventilator isn't moving as much air as I anticipated. Why?
Belt-Drive Centrifugal Downblast Exhaust Ventilators
a) The system resistance could be too high. Check system for proper operation of backdraft or control dampers or obstruction in duct work. b) The wheel may be running backwards. Correct rotation. c) You may have a damper that is closed. Inspect and repair damper. d) The wheel speed may be too slow. Check that drive combination is correct, adjust VP pulleys to less turns open. e) The duct sections may be loose fitting permitting air loss. Check for secure connection where duct sections are joined. If necessary, use duct tape at seams for sealed closure.
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Why is my exhaust ventilator not working?
Belt-Drive Centrifugal Downblast Exhaust Ventilators
a) You may have a blown fuse or breaker. Replace or repair. b) Motor may be defective. Replace or repair. c) Ventilator may 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 belts may be broken. Replace belts. f) The electricity may be turned off. Contact local power company.
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Why is my motor overloading and shutting off?
Belt-Drive Centrifugal Downblast Exhaust Ventilators
a) The wheel RPM may be too high. Check that the drives are correct, increase turns open on VP pulley. b) Your motor may have a shorted motor winding. Replace motor. c) The wheel 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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Why is my ventilator so noisy?
Belt-Drive Centrifugal Downblast Exhaust Ventilators
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 wheel may be improperly aligned and rubbing. Center wheel on inlet. 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) There may be foreign objects in wheel or housing. Remove, check for damage or unbalance. i) The wheel may be out of balance caused by excessive dirt and grease buildup. Clean wheel to remove buildup or replace if necessary. j) Your ventilator base may not be securely anchored. Secure your ventilator properly. k) The motor hood may be loose and rattling. Tighten acorn nuts to secure motor hood.
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