Belt Drive Specifications
Duct mounted supply, exhaust, or return fans shall be of the centrifugal, belt driven, inline type. The fan housing shall be of the square design constructed of heavy gauge galvanized steel or aluminum and shall include square duct mounting collars.
Fan construction shall include two removable access panels located perpendicular to the motor mounting panel. The access panels must be of sufficient size to permit easy access to all interior components.
The fan wheel shall be centrifugal backward inclined, constructed of aluminum, and shall include a wheel cone carefully matched to the inlet cone for precise running tolerances. Wheels shall be statically and dynamically balanced.
Motors shall be
enclosure. Motors and drives shall be mounted out of the airstream. Motors shall be readily accessible for maintenance.
Precision ground and polished fan shafts shall be mounted in permanently sealed, lubricated pillow block ball bearings. Bearings shall be selected for a minimum L10 life in excess of 100,000 hours (L50 average life in excess of 500,000 hours) at maximum cataloged operating speed.
Drives shall be sized for a minimum of 150 percent of driven horsepower.
Pulleys shall be of the fully machined cast iron type, keyed, and securely attached to the wheel and motor shafts.
Motor pulleys shall be adjustable for final system balancing. A
All fans shall bear the AMCA Certified Ratings Seal for both sound and air performance.
Each fan shall bear a permanently affixed manufacturer’s nameplate containing the model number and individual serial number for future identification.
Fans shall be model BSQ as manufactured by Greenheck Fan Corporation of Schofield, Wisconsin, USA.
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