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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!
Model RDD
Direct Drive
Model RDD is a direct drive downblast
centrifugal exhaust fan. These fans are
specifically designed for roof mounted
applications exhausting relatively clean
air. Fans are UL/cUL Listed 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.
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.
Roof Mounted Downblast Fans
Model RDB
Belt Drive
RDB
downblast centrifugal exhaust fans.
These fans are specifically designed for
roof mounted applications exhausting
relatively clean air. Fans are UL/cUL
Listed 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.
NOM WARNING
This product is not intended to be used by persons
(including children) whose physical, sensory or mental
capabilities are reduced, or with lack of experience or
knowledge unless such persons are supervised or trained to
operate the device.
Children must be supervised to ensure they do not use this
equipment as a toy.
IMPORTANT
If the power cord is damaged, it must be replaced by the
manufacturer, its authorized service agent or by qualified
personnel in order to avoid hazard.
Document 479715
Model RDD Direct Drive
Model RDB Belt Drive
model
fans
are
belt
Roof Mounted Downblast Fans
drive
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