Installation Guide
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Hardware
Fan hardware for hanging the fan and airfoils is provided on hardware boards. Verify you have all of the following
required hardware before beginning the installation process. If you are missing any piece required for installation,
contact Big Ass Fans Customer Service. Note: No hardware substitutions are acceptable.
Mounting Hardware Board
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Upper Mount Hardware
• (4) 1/2-13 x 2” GR 8 Bolts
• (8) 1/2” Flat Washers
• (4) 1/2-13 Nylock Nuts
Safety Cable Shackle
Extension Tube Hardware
• (2) 1/2-13 x 4-1/2” GR 8 Bolts
• (4) 1/2” Flat Washers
• (2) 1/2-13 Nylock Nuts
Lower Yoke Hardware
• (2) 1/2-13 x 4-1/2” GR 8 Bolts
• (4) 1/2” Flat Washers
• (2) 1/2-13 Nylock Nuts
Main Fan Unit, Airfoil, & Winglet Hardware Boards
Main Fan Unit Hardware
• (4) 1/2-13 x 1-3/4” GR 8 Bolts
• (8) 1/2” Flat Washers
• (4) 1/2-13 Nylock Nuts
Airfoil Hardware
• (12) 5/16-18 x 2” GR 8 Bolts
• (24) 5/16” Flat Washers
• (12) 5/16-18 Nylock Nuts
Winglet Hardware
• (6) 10-24 x 1/2” Bolts
• (6) 10-24 x 3/4” Barrels
1. Square washers are included and are only used if you are mounting the fan to angle irons. The number of square washers used depends on the number of angle irons used.
Parts
Check that the fan boxes have all the parts before beginning installation. If you ordered multiple fans, be sure
to keep the components of each fan together. The fans each have dierently rated components that are not
interchangeable. Note: Illustrations are not to scale.
(2) Beam Clip
(2) Spacer
Upper Mount Lower Yoke Variable Frequency
Drive (VFD)
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Fire Relay
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(6) Airfoils (6) Winglets (6) Airfoil Retainers
Main Fan Unit
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1. The VFD includes a 10-ft (3 m) pre-attached AC supply cord. An Electronic
Programming Module (EPM) is installed in the VFD.
2. The fire relay is required for fans that will be installed in buildings that have
a fire sprinkler system. See the Wiring Diagrams & Electrical Guidelines
section for fire relay wiring details.
3. The fan includes a pre-attached motor cord.
4. The safety cable is attached to the extension tube.
Extension Tube & Safety Cable
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