Greenheck Fan Greenheck Centrifugal Inline Fans SQ/BSQ - Manual (Page 8)

8
Options and Accessories
Aluminum Construction
Aluminum construction is available for all direct drive
sizes 60-160 and belt drive sizes 70-300. Some
drive frame components may still be of galvanized
construction to maintain structural integrity.
Speed Controllers
Available for use with
shaded pole and permanent
split capacitor (PSC) motors
on model SQ fans. They
provide an economical
means of system balancing
with direct drive fans.
Inlet and Outlet Guards
Inlet and outlet guards provide protection for non-
ducted applications. Guards are fabricated of welded
wire on a galvanized steel frame. They are easily
removed for maintenance and inspection.
Belt Drive Motor Cover and Belt Guard
For belt driven fans, combination motor cover
and belt guards constructed of galvanized steel
are available for protection of motors, drives and
personnel. Standard on units specified with UL.
Direct Drive Motor Cover
Formed, galvanized steel motor covers are available
to isolate direct drive motors from the airstream.
When motor covers are furnished, vents to the
exterior of the fan are provided to ensure sufficient
motor cooling.
Backdraft Dampers
Gravity or motorized
parallel blade dampers
(model WD-330) are
available for duct
mounting. These
dampers feature sturdy
galvanized frames,
aluminum blades with
vinyl blade seals, and
a balanced design for
minimal resistance to
airflow.
Control Dampers
Square, opposed blade volume control dampers
(model VCD) are available for duct mounting. These
dampers feature sturdy galvanized frames, and
steel blades with optional blade and jamb seals.
A balanced design results in minimal resistance to
airflow.
Coatings
Wide variety of coatings
and colors are available.
Decorative coatings
are available in sixteen
standard colors.
Protective coatings are
available in a choice of
five electrostatic applied
powders providing an
available selection for
most environments.
All Greenheck coatings
and resistance charts can be found in our
Performance Coatings for Commercial & Industrial
Fans brochure.
Inlet Vane Dampers
Variable inlet vane dampers (model IVDE) are
available for models SQ and BSQ sizes 140-420
and are factory-assembled to the fan. They can be
specified for either manual or automatic operation
(controls furnished by others). These dampers are
constructed of heavy-gauge steel and feature uniform
blade movement for positive control. Companion inlet
rings for round duct connections are also available.
Insulated Housing
For noise reduction and condensation control, the
interior of the fan housing can be lined with a 1-inch
fiberglass duct liner. The optional motor cover can
also be insulated.
The table depicts the radiated sound reduction that
can be obtained in each octave band for the insulated
housing and motor cover together.
Wiring Pigtail
Allows direct hook-up to the power supply eliminating
field wiring at the fan.
Approximate Radiated Sound Attenuation (dB)
Octave Band 1 2 3 4 5 6 7 8
Sizes 60 - 130 -2 -7 -4 -4 -6 -13 -13 -9
Sizes 140 - 420 -3 -2 -5 -4 -5 -5 -7 -8