Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble,
install, operate or maintain the product described. Protect yourself and others by observing all safety
information. Failure to comply with instructions could result in personal injury and/or property damage!
1
Downblast Centrifugal Roof Exhaust Fans
Model G
Direct Drive
Model G is a direct drive downblast
centrifugal exhaust fan. These fans
are specifically designed for roof
mounted applications exhausting
relatively clean air. Performance
capabilities range up to 4,300 cfm
(7,305 m
3
/hr)
and up to 1 in. wg
(249 Pa)
of static pressure. The
maximum continuous operating
temperature is 180°F
(82ºC)
.
G models are available in 27 sizes
with nominal wheel diameter
ranging from 8 to 24 inches
(203 to 610 mm)
(060 - 243 unit sizes). Each fan shall
bear a permanently affixed manufacturer’s engraved
metal nameplate containing the model number and
individual serial number. All fans are UL/cUL Listed
Standard 705.
General Safety Information
Only qualified personnel should install this fan.
Personnel should have a clear understanding of these
instructions and should be aware of general safety
precautions. Improper installation can result in electric
shock, possible injury due to coming in contact with
moving parts, as well as other potential hazards. Other
considerations may be required if high winds or seismic
activity are present. If more information is needed,
contact a licensed professional engineer before moving
forward.
1. Follow all local electrical and safety codes, as
well as the National Electrical Code (NEC) and the
National Fire Protection Agency (NFPA), where
applicable. Follow the Canadian Electrical Code
(CEC) in Canada.
2. The rotation of the wheel is critical. It must be free
to rotate without striking or rubbing any stationary
objects.
3. Motor must be securely and adequately grounded.
4. Do not spin fan wheel faster than max cataloged
fan RPM. Adjustments to fan speed significantly
affects motor load. If the fan RPM is changed, the
motor current should be checked to make sure it is
not exceeding the motor nameplate amps.
5. Do not allow the power cable to kink or come in
contact with oil, grease, hot surfaces or chemicals.
Replace cord immediately if damaged.
6. Verify that the power source is compatible with the
equipment.
7. Never open access doors to a duct while the fan is
running.
Model GB
Belt Drive
GB model fans are belt drive
downblast centrifugal exhaust fans.
These fans are specifically designed
for roof mounted applications
exhausting relatively clean air.
Performance capabilities range
up to 44,700 cfm
(75,950 m
3
/hr)
and up to 2.5 in. wg
(623 Pa)
of
static pressure. The maximum
continuous operating temperature
is 180°F
(82ºC)
. GB models are
available in twenty sizes with
nominal wheel diameters ranging
from 11 to 54 inches
(279 to 1372 mm)
(071-540
unit sizes). Each fan shall bear a permanently affixed
manufacturer’s nameplate containing the model
number and individual serial number. All fans are
UL/cUL Listed Standard 705.
DANGER
Always disconnect, lock and tag power source before
installing or servicing. Failure to disconnect power
source can result in fire, shock or serious injury.
CAUTION
When servicing the fan, motor may be hot enough
to cause pain or injury. Allow motor to cool before
servicing.
CAUTION
Precaution should be taken in explosive atmospheres.
®
®
Document #471558
Model G and GB
