Attach Airfoils (To Main Fan Unit) - BIG ASS FANS Isis Guide D'installation

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3. Attach airfoils (to main fan unit)

After the fan is completely assembled and securely hanging from the mounting structure, peel off the protective
plastic from the bottom of the hub.
WARNING: Disconnect power to fan before installing airfoils.
Attach the eight (8) airfoil retainers using the Airfoil Hardware. Moving clockwise around the fan hub, position the airfoil retainers as
shown. Hole A of the retainer should be positioned over top of Hole B. Do not tighten bolts until all airfoil retainers have been
attached!
Tighten the bolts along the outside perimeter to 29 ft·lb (39.3 N·m) using a torque wrench with a 6 mm Allen head socket. After the
outer perimeter bolts are torqued, tighten the bolts along the inner perimeter to 29 ft·lb (39.3 N·m).
Airfoil Hardware (BAF-Supplied):
a. (16) M8 x 18 mm Socket Head Cap Screw
b. (16) 8 mm Belleville Washer
Installing Airfoils (cont.)
If the hardware is stainless steel (outdoor fans only), do
not use power tools!
Belleville Washer
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Hole A
Hole B
b