Greenheck Fan Greenheck Centrifugal Inline Fans SQ/BSQ - Manual (Page 46)

46
Direct Drive Specifications
Model SQ
Duct mounted
supply, exhaust
or return fans
shall be of the
centrifugal, direct
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 permanently lubricated and carefully
matched to the fan loads. Motors shall be readily
accessible for maintenance.
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.
All fans 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 SQ as manufactured by
Greenheck Fan Corporation of Schofield,
Wisconsin, USA.
Vari-Green ® Motor
Motor to be an electronic
commutation (EC) motor
specifically designed for
fan applications. AC
induction type motors
are not acceptable. Examples of
unacceptable motors are: Shaded Pole, Permanent
Split Capacitor (PSC), Split Phase, Capacitor Start
and 3 phase induction type motors. Motors shall be
permanently lubricated with heavy-duty ball bearings
to match the fan load and prewired to the specific
voltage and phase. Internal motor circuitry shall
convert AC power supplied to the fan to DC power to
operate the motor. Motor shall be speed controllable
down to 20% of full speed (80% turndown). Speed
shall be controlled by either a potentiometer dial
mounted on the motor or by a 0-10 VDC signal. Motor
shall be a minimum of 85% efficient at all speeds.
Vari-Green ® Controls
Constant Pressure
Greenheck’s Constant Pressure system shall be a
complete package designed to regulate fan speed
based on demand while maintaining a constant
static pressure. System shall include fan with Vari-
Green Motor, Vari-Green Constant Pressure control,
transformer, and pressure tap. Vari-Green Constant
Pressure control shall have the transducer integrated
with a touch button control panel. Control shall have a
run mode and a program mode preventing unwanted
changes when in run mode. Transformer shall be
factory-supplied to provide power to the Vari-Green
Constant Pressure controller. System shall include
a self-sealing aluminum pressure tube with ¼-inch
connection. Fan shall be centrifugal direct drive type
in upblast, downblast, or inline configuration with
controllable EC Vari-Green motor.
Remote Dial
Remote dial shall be a Vari-Green control specifically
designed to provide 0-10 volt DC signal to
Greenheck’s Vari-Green Motor.
2-Speed
2-Speed control shall be a Vari-Green Control
specifically designed to allow the Vari-Green Motor
to operate at two distinct speeds. 2-Speed control
shall include two dials that may be set at any
point between 0 and 10 volts DC and an integral
transformer capable of reducing 115/230 volt AC
power to 24 volt AC power.
LEED information
Greenheck became one of the first manufacturers
in the Air Movement and Control industry to join
the LEED/green movement when they joined the
United States Green Building Council (USGBC) in
2005. Greenheck has been actively researching
qualification requirements for our products to
meet LEED credits and prerequisites.
The Vari-Green ® motor significantly
helps qualification efforts for the
Energy and Atmosphere credits
and prerequisites; specifically credit one,
Optimize Energy Performance and prerequisite
two, Minimum Energy Performance.