Bigassfans Basic 6 - Preparing the work site

12’–24’ BASIC 6
®
7
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12’–24’ BASIC 6
®
Preparing the work site
Before beginning installation, review the mechanical and electrical installation guidelines below.
Mechanical installation
• A 24-ft (7.3-m) Basic 6
®
fan (largest model) with a 1-ft extension tube weighs, at maximum, 241 lbs (109 kg). A suitable means for
lifting the weight of the fan, such as a scissor lift, and at least two installation personnel will be required.
• Big Ass Fans can only be hung from an I-beam or angle irons. For specic requirements, see the Mechanical Installation section
in this guide. Do not mount the fan to single purlins, trusses, or bar joists. Consult a structural engineer for installation methods not
covered in this manual.
• The mounting structure must be able to withstand the torque forces generated by the fan. A 24-ft fan generates nearly 300 ft·lb
(406.7 N·m) of torque during operation.
• Fans mounted on fabricated I-beams, which are common in steel buildings, could cause the beam to ex and the fan to move
signicantly during operation. If this exing causes a clearance problem we suggest installing I-Beam Stabilizer kit.
• If the fan’s extension tube is 4 ft (1.2 m) or longer or if the mounting structure requires it, the fan’s lateral movement must be secured
using guy wires. If the fan is close to any building xtures it is recommended to secure the fan with guy wires as a safety measure.
• Adhere to the safety requirements in the table below when selecting the fan location.
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. See the table on page 2 for recommended minimum ceiling
clearances.
Blade height ≥10 ft above the floor
HVAC equipment
≥1x fan diameter if at same level or 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 installation
• To reduce the risk of electric shock, wiring should be performed by a qualied electrician! Incorrect assembly can cause electric
shock or damage the motor and the controller!
• The installation of a Big Ass Fan must be in accordance with the National Electrical Code, ANSI/NFPA 70-2011, and all local codes.
• Refer to the Electrical Installation section in this manual for acceptable cable types, conduit, and other electrical requirements.
• Controller output/motor input leads cannot share a conduit with any other controller’s AC supply feed.
• If you are installing an onboard variable frequency drive (VFD), route the power wiring to the location where the fan will be mounted.
Pre-Installation (cont.)
I-Beam Angle Iron
HVAC
Diffuser
≥1x fan’s diameter (24 ft)
24-ft diameter
24-ft diameter
HVAC
Diffuser
≥2x fan’s diameter (48 ft)
The fan is located at or above
the HVAC discharge or intake.
The fan is located below the
HVAC discharge or intake.