BIG ASS FANS 2025 Installation Manual page 27

C. Attach airfoils to main fan unit
Attach the six airfoil retainers using the Airfoil Hardware. Moving clockwise around the fan hub, position the airfoil
retainers end over end as shown. Hole A of the retainer should be positioned over top of Hole B. Do not tighten
the bolts until all airfoil retainers have been attached!
Tighten the bolts along the outer 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:
a. (12) M8 x 18 mm Socket Head Cap Screw
b. (12) 8 mm Belleville Washer
Belleville Washer Airfoil Retainer
Hole A
Hole B
b
21
WWW.BIGASSSOLUTIONS.COM © 2015 DELTA T CORP. ALL RIGHTS RESERVED.