Greenheck Fan SQ - Manual (Page 6)

6
Options and Accessories
ALUMINUM CONSTRUCTION
Aluminum construction is available for all direct
drive sizes 60-160 and belt drive sizes 70-300.
SPEED CONTROLLERS
Available for use with shaded pole and permanent
split capacitor (PSC)
open motors on model
SQ fans. They provide
an economical means of
system balancing with
direct drive fans.
INLET AND DISCHARGE GUARDS
Inlet and discharge 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.
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.
GRAVITY DAMPERS
Gravity or motorized parallel blade dampers (model
WD-330) are available
for duct mounting. These
dampers feature sturdy
galvanized frames with
prepunched mounting
holes, aluminum blades
with felt edges, 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 with
prepunched mounting holes, steel blades with vinyl
seals, and flexible metal 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 the performance coatings catalog.
INLET VANE
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
with controls furnished by others. These dampers
are constructed of heavy gauge painted 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
fiberglass duct liner (1/2 and 1 in. being standard).
The optional motor cover can also be insulated.
The table depicts the dB 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 dB Sound Attenuation
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