Greenheck Fan Greenheck Centrifugal Inline Fans SQ/BSQ - Manual (Page 47)

47
Duct mounted supply, exhaust or return fans shall
be of the centrifugal, belt driven, inline type. The fan
housing shall be of a 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 heavy-duty ball bearing type carefully
matched to the fan load and furnished at the specified
voltage, phase, and 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 L
10
life in excess of 100,000 hours
(L
50
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 NEMA-1 disconnect switch shall be provided as
standard, except with explosion resistant motors,
where disconnects are optional. Factory wiring shall
be provided from motor to the handy box.
Fan shall bear the AMCA Certified Ratings Seal for
Sound and Air Performance.
Fan shall bear a permanently affixed manufacturer’s
nameplate containing the model number and
individual serial number for future identification.
Fan shall be model BSQ as manufactured by
Greenheck Fan Corporation of Schofield,
Wisconsin, USA.
Belt Drive Specifications
Model BSQ