BIG ASS FANS Isis, Installation Manual

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7
Isis
®
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Preparing the work site
When surveying the work site, keep the following mechanical and electrical guidelines in mind.
Mechanical
• A suitable means for lifting the weight of the fan, such as a scissor lift, and at least two installation personnel will be required.
• If hanging the fan from an angle iron, the minimum dimensions of the angle iron must be 2-1/2’’ × 2-1/2’’ × 1/4’’ (6.4 cm × 6.4 cm ×
0.6 cm) and it cannot be longer than 12 ft (3.6 m). It must be secured to the structure. Do not mount the fan to a single purlin, truss,
or bar joist. Consult a structural engineer for installation methods not covered in this manual.
• To reduce the risk of injury to persons, install the fan so that the airfoils are at least 10 ft (3.05 m) above the floor.
• If mounting the fan in the vicinity of an infrared/radiant heater, it is recommended that the fan be mounted outside of the clearances
recommended by the manufacturer of the heater and at a height equal to or above the shielding on the heating element with the
controller on the opposite side of the heater. If mounting the fan below the heater shielding, all fan elements must be outside of
the clearances recommended by the heater manufacturer and the VFD must be remotely mounted. The installation manual for the
specific model of heater will typically provide the minimum clearance to combustibles (MCC).
• Ensure the mounting location will not expose the fan to direct contact with water unless the fan is labeled, “Suitable for use in wet
locations.”
• Adhere to the safety requirements in the table below when selecting where to mount the fan.
Safety requirement Minimum distances
Clearance
≥2 ft from all fan parts. The fan installation area must be free of obstructions such as lights, cables,
sprinklers, or other building structure.
Blade height ≥10 ft above the floor
HVAC equipment ≥1x fan diameter if above diffuser. ≥2x fan diameter if below diffuser. Refer to the illustration below.
Fan spacing 2.5x fan diameter, center-to-center
Radiant/IR heaters See the manufacturer’s requirements for the minimum clearance to combustibles.
Electrical
• Identify the existing wiring to determine which wiring application is needed to install the fan.
• If installing the fan on a typical lighting circuit with one basic light switch in which the critical red conductor or “traveler” is absent, you
will need to purchase the Limited Access Controller. Please discuss this option with your Big Ass Fans representative.
The fan should only be installed according to the instructions described in this manual. Consult a structural engineer
for installation methods not covered in this manual. For optional mounting methods, refer to the installation instructions
included with the fan parts.
Pre-Installation (cont.)
HVAC
Diffuser
HVAC
Diffuser
If the fan is mounted at the same level
or higher than a diffuser, the winglets
must be at a distance that is at least 1x
the measure of the fan’s diameter.
≥1x fan’s diameter
(8 ft)
≥2x fan’s diameter
(16 ft)
8-ft diameter
8-ft diameter
If the fan is mounted below a diffuser,
the winglets must be at a distance that
is at least 2x the measure of the fan’s
diameter.