Bigassfans 8' - 24' PowerfoilPlus User manual

8’ - 24’ POWERFOILPLUS™, POWERFOIL™, & WICKERBILL FANS
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Installation Checklist
Did a structural engineer approve the mounting structure? (See p. 11 for Big Ass Fans
approved mounting structures.)
Do you have the correct safety cable? Are you familiar with its use? (See p. 19 for
information on properly securing the safety cable.)
Will the fan be installed so that the blades are at least 10 ft (3.05 m) above the oor?
Will the fan be installed so that the blades have at least 2 ft (0.61 m) of clearance from
obstructions?
Will the fan be installed so that it is not subjected to high winds (such as from an
HVAC system) or near a large garage door? (The distance between the fan and the HVAC
equipment [or other air-moving equipment] should be no less than 2x the fan’s diameter when
measured from the center of the fan to the equipment.)
Will the distance between multiple fans be at least 2.5x the fans’ diameter when
measured from the centers of the fans.
If installing on an I-beam, is the upper yoke the correct size? (See p. 11 for more
information on installing the fan on an I-beam.)
If you ordered multiple fans, did you keep the parts of each fan together?
Some motors have the factory label, “This Unit Factory Wired for 460 VAC.” If you have
a 200-250V or 100-125V controller, did you rewire the motor for proper use? (See wiring
diagrams on pp. 50-51 for additional information.)
Do you have the correct power circuit for the fan controller? (See p. 28 for information
on selecting the correct circuit/fuse for the fan controller.)
Customer Service: 1-877-BIG-FANS
(International: 1-859-233-1271)

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8’ - 24’ POWERFOILPLUS™, POWERFOIL™, & WICKERBILL FANS
Installation Guide
8’ - 24’ PowerfoilPlus™, Powerfoil™,
& Wickerbill Fans
2425 Merchant Street
Lexington, KY 40511
1-877-BIG-FANS
www.bigassfans.com
May be covered by one or more
of the following United States Patents: 6,244,821;
6,589,016; 6,817,835; 6,939,108; 7,252,478; 7,284,960;
D607,988; D587, 799; 7,654,798; and other patents pending
Installation Guide:
301110- Nov. 2010
The C-UL-US mark from Underwriters
Laboratory applies only to Big Ass
Fans electrical control panels.
This product was manufactured in a plant
whose Management System is certied as
being in conformity with ISO 9001:2000.
3128438
Conforms to ANSI/UL STD 507
Certied to CAN/CSA C22.2 No.113
See p. 71.

8’ - 24’ POWERFOILPLUS™, POWERFOIL™, & WICKERBILL FANS
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IMPORTANT SAFETY INSTRUCTIONS
READ AND SAVE THESE INSTRUCTIONS
WARNING—TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:
a) Installation work and electrical wiring must be done by qualied person(s) in accordance with all applicable codes and
standards.
b) When cutting or drilling into a wall or ceiling, do not damage electrical wiring and other hidden utilities.
CAUTION: The installation of a Big Ass Fan must be in accordance with the requirements specied in this installation manual
and with any additional requirements set forth by the national electric code (NEC), ANSI/NFPA 70-1999, and all local codes.
Code compliance is ultimately YOUR responsibility!
WARNING: The fan controllers contain high voltage capacitors that take time to discharge after removal of mains supply.
Before working on the fan controller, ensure isolation of mains supply from line inputs at the fan controller’s disconnect (L1,
L2/N, L3). Wait 3 minutes for capacitors to discharge to safe voltage levels. Failure to do so may result in personal injury or
death. NOTE: Darkened display LEDs are not an indication of safe voltage levels.
CAUTION: Exercise caution and common sense when powering the fan. Do not connect the fan to a damaged or hazardous
power source. Do not attempt to resolve electrical malfunctions or failures on your own. Contact Big Ass Fans at 1-877-BIG-
FANS if you have any questions regarding the electrical installation of this fan.
Suitable for use with solid-state speed controls.
WARNING: To reduce the risk of re, electric shock, and injury to persons, Big Ass Fans must be installed with Big Ass
Fan supplied controllers that are marked (on their cartons) to indicate the suitability with this model. Other parts cannot be
substituted.
CAUTION: When service or replacement of a component in the fan requires the removal or disconnection of a safety device,
the safety device is to be reinstalled or remounted as previously installed.
WARNING: Risk of re, electric shock, or injury to persons during cleaning and user-maintenance! Disconnect the appliance
from the power supply before servicing.
WARNING—TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:
a) Use this unit only in the manner intended by the manufacturer. If you have questions, contact the manufacturer.
b) Before servicing or cleaning unit, switch power off at service panel and lock the service disconnecting means to prevent
power from being switched on accidentally. When the service disconnecting means cannot be locked, securely fasten a
prominent warning device, such as a tag, to the service panel.
CAUTION: Do not bend the blades when installing, adjusting, or cleaning the fan. Do not insert foreign objects between
rotating fan blades.
WARNING: Stay alert and use common sense when installing fans. Do not install fans if tired or under the inuence of drugs,
alcohol, or medication. A moment of inattention while installing fans may result in serious personal injury.
CAUTION: The installation of this fan requires the use of some power tools. Follow the safety procedures found in the owner’s
manual for each of these tools and do not use them for purposes other than those intended by the manufacturer.
CAUTION: The Big Ass Fans product warranty will not cover equipment damage or failure that is caused by improper
installation.

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8’ - 24’ POWERFOILPLUS™, POWERFOIL™, & WICKERBILL FANS
Contents
Introduction Thank You 1
About Big Ass Fans 1
About This Fan 2
What’s in the Box 3
Pre-Installation Parts Included 4
Tools Needed 5
Important Weights 5
Recommended Torque 5
Fan Diagram 6
Allen-Bradley Controller Diagram (Optional) 7
Preparing the Work Site 8
Understanding Airow Patterns 9
Mounting Method 1:
I-Beam
1. Attach Upper Yoke (to I-Beam) 11
Mounting Method 2:
Angle Irons
1. Select Proper Angle Irons 12
2. Pre-drill Angle Irons 13
3. Fasten Angle Irons Together (if span is longer than 8’) 13
4a. Fasten Single Angle Irons to Roof Structure Mounting Points 14
4b. Fasten Double Angle Irons to Roof Structure Mounting Points 15
5a. Attach Upper Yoke (to Angle Irons) 16
5b. Attach Motor Frame (to Angle Irons) 17
Hanging The Fan 1. Attach Extension Tube (to Upper Yoke) 18
2. Secure Safety Cable 19
3. Attach Lower Yoke (to Extension Tube) 20
4. Attach Motor Frame (to Lower Yoke) 20
Installing Guy Wires 1. Attach Eyebolt to Motor Frame 21
2. Attach Beam Clamp 21
3. Route Guy Wire Through Gripple 22
4. Install Three Remaining Guy Wires 22
Replacing Oil Plug Replace Oil Plug on Bonglioli Motors 23
Replace Oil Plug on Bonglioli Motors (24 ft Fans) 24
Replace Allen Head Plug on Baldor Motors 25
Installing Airfoils 1. Attach Winglets (Powerfoil, PowerfoilPlus) 26
2. Attach Airfoils to Hub 26
Electrical Installation Electrical Installation Safety 27
Electrical Installation Overview 27
Power Requirements for Big Ass Fan Controllers 28
Controller Dimensions 29
Mounting Controller 30
Controller Storage 30
Input Power Conditioning 30
Power Wiring Guidelines 31
Conduit/Piping Guidelines 32
Installation Techniques: Single Fan Controls 33
Installation Techniques: Multiple Fan Controls 34
Grounding 35
Standard Grounding for Powerex 4 Controller 36
Standard Grounding for Powerex 4M Controller 37
Shielded Motor Cable Grounding for Powerex 4 Controller 38
Shielded Motor Cable Grounding for Powerex 4M Controller 39
Multi-Fan Grounding for Powerex 4 Controller 40

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Electrical Installation RFI/EMI Grounding for Powerex 4 Controller 41
RFI/EMI Grounding for Powerex 4M Controller 42
Ungrounded Distribution Systems 43
Wiring: KBDA Controller (200-250V Single Phase) 44
Wiring: KBDA (200-250V & 400-480V 3 Phase) 45
Wiring: Powerex 4 Controller (100-125V Single Phase) 46
Wiring: Powerex 4 Controller (200-250V Single Phase) 47
Wiring: Powerex 4 Controller (200-250V 3 Phase) & (400-480V 3 Phase) 48
Wiring: Powerex 4 Controller (575-600V 3 Phase) 49
Wiring the Motor: Bonglioli Motor (100-125 & 200-250 Volts) 50
Wiring the Motor: Bonglioli Motor (400-480 Volts) 50
Wiring the Motor: Reliance/Baldor Motor (400-480 Volts) 51
Wiring the Motor: Reliance/Baldor Motor (200-250 Volts) 51
Start-up Procedures For KBDA Controllers 52
Short (<100 ft (30.5 m)) vs. Long (>75 ft (22.9)) Motor Lead Adjustment 53
Start-up Procedures For Allen-Bradley Controllers 55
Start-up Procedures For Multi-Fan Controllers 56
Additional Input Power
Considerations
Input Voltage Irregularities 58
Delta Secondary 58
Branch Circuit Protection 59
KBDA Controller Specications and Environmental Ratings 60
Allen-Bradley Controller Specications and Environmental Ratings 61
Baldor or Reliance - 3 Lead, Single Voltage Wye for 600V Installations 62
NORD - 3 Lead, Single Voltage Wye for 600V Installations 62
Operating the Fan Heating Season 63
Cooling Season 63
User Servicing Annual Preventive Maintenance 65
Troubleshooting General Troubleshooting 66
Troubleshooting KBDA Controllers 67
Troubleshooting Allen-Bradley Controllers 68
CE Compliant Instructions CE Compliant Instructions 71
Declaration of Conformity 72
Fan Mounting Height Requirements 73
Fan Airborne Noise Emissions 73
Electrical Installation 73
CE Compliant Grounding for Powerex 4 Controller 74
CE Compliant Grounding for Powerex 4M Controller 75
Warranty Big Ass Fans Warranty Policy 77
Warranty Claim Form Instructions 79
Acknowledgment & Return Instructions 80
Warranty Claim Form 81
Responsibility Agreement 82
Annual Maintenance
Checklist
Annual Maintenance Checklist 83
Big Ass Fan Certied
Installers
Check-In Procedure 85
Close-Out Procedure 86

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8’ - 24’ POWERFOILPLUS™, POWERFOIL™, & WICKERBILL FANS
Introduction
Thank You
Thank you and congratulations on your Big Ass Fan purchase! You now have an efcient and cost-effective way to stay cool in the
summer and warm in the winter. The sleek revolutionary design of our fans will look great in any commercial or industrial setting.
More importantly, you can rest assured that you have a product that is backed by extensive research, thorough testing, and quality
manufacturing.
If you have any questions or comments, contact us at 1-877-BIG-FANS or visit our Web site at www.BigAssFan.com.
Who We Are and What We Do
FOUNDED IN 1999, Lexington, KY-based Big Ass Fan Company is the preeminent designer and manufacturer of high volume/low
speed (HVLS) ceiling and vertical fans designed to improve facility and worker comfort in large commercial, industrial, agricultural, and
institutional buildings worldwide.

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8’ - 24’ POWERFOILPLUS™, POWERFOIL™, & WICKERBILL FANS
About this Fan
The specications of the fan depend on the size and model. The table below lists the specications for the Powerfoil™ model.
Specications (Powerfoil™)
Fan
Size Motor Max Amp Speed (At 60hz)
Air Displacement
(At Max Speed)
Airfoil
Length Weight1Suggested Distance From Ceiling2
8 ft
(2.4 m)
1 HP, 1750 RPM,
208/230/460V
3.8@208V, 3.4@230V,
1.7@460V 112 RPM 39,015 cfm (18,413 L/S)
40’’
(102 cm)
170 lbs
(77 kg) 3 ft (0.61 m)
10 ft
(3 m)
1 HP, 1750 RPM,
208/230/460V
3.8@208V, 3.4@230V,
1.7@460V 103 RPM 74,122 cfm (34,982 L/S)
52’’
(132 cm)
183 lbs
(83 kg) 3 ft (0.61 m)
12 ft
(3.6 m)
1 HP, 1750 RPM,
208/230/460V
3.8@208V, 3.4@230V,
1.7@460V 81 RPM 101,579 cfm (47,940 L/S)
64’’
(163 cm)
200 lbs
(91 kg) 3 ft (0.61 m)
14 ft
(4.3 m)
1.5 HP, 1725 RPM,
208/230/460V
5.3@208V, 5.0@230V,
2.5@460V 71 RPM 113,829 cfm (53,721 L/S)
76’’
(193 cm)
220 lbs
(100 kg) 4 ft (0.91 m)
16 ft
(4.9 m)
1.5 HP, 1725 RPM,
208/230/460V
5.3@208V, 5.0@230V,
2.5@460V 63 RPM 147,569 cfm (69,645 L/S)
88’’
(224 cm)
239 lbs
(108 kg) 4 ft (0.91 m)
18 ft
(5.5 m)
1.5 HP, 1725 RPM,
208/230/460V
5.3@208V, 5.0@230V,
2.5@460V 55 RPM 178,568 cfm (84,275 L/S)
100’’
(254 cm)
256 lbs
(116 kgs) 4 ft (0.91 m)
20 ft
(6.1 m)
1.5 HP, 1725 RPM,
208/230/460V
5.3@208V, 5.0@230V,
2.5@460V 47 RPM 223,572 cfm (105,515 L/S)
112’’
(284 cm)
290 lbs
(132 kg) 5 ft (1.22 m)
24 ft
(7.3 m)
2 HP, 1725 RPM,
208/230/460V
6.3@208V, 5.8@230V,
2.9@460V 42 RPM 337,774 cfm (159,412 L/S)
136’’
(345 cm)
328 lbs
(149 kg) 5 ft (1.22 m)
1. Weight includes weight of Powerfoil airfoils and motor hub, and does not include the weight of any extension tubes, mounting yokes, other
customized mounting hardware, or other airfoil styles. For more information, see “Important Weights” on p. 5.
2. Add additional 2 ft for PowerfoilPlus™ fans.
Motor
• 1 to 2 HP motor
• NEMA Design B
• 208/230/460 Volts AC
• 1725 RPM
• 60Hz, 3 Phase
• Insulation: Class F
• Rating: 40° C Ambient-Continuous
Reduction Gear
• Concentric Helical Gear Reducer
• Gear Hardened to 58-62 Rockwell C
• Precision nished for low noise and long service life
• Double seals keep oil in and contaminant out
• Lubricated for life with synthetic oil

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8’ - 24’ POWERFOILPLUS™, POWERFOIL™, & WICKERBILL FANS
(10) Airfoils
Airfoil Box
What’s in the Box
The fan is shipped in multiple boxes. The larger box contains the motor/hub assembly, upper yoke (with beam clips and spacers), lower
yoke, extension tube (if 3 ft or shorter) with attached safety cable, winglets (Powerfoil™ or PowerfoilPlus™ models only), control panel,
and mounting hardware. The smaller box contains the airfoils. If the extension tube is 4 ft or longer, it will also be shipped in a separate
box.
CAUTION: If you ordered multiple fans, be sure to keep the components of each fan together. The fans each have differently
rated components that are not interchangeable.
NOTE: Dashed lines indicate internal boxes. Drawings below are not to scale.
(2) Lower Yoke
(2) Beam Clip &
(2) Spacer Upper Yoke (10) Winglet2
Extension Tube3
& Safety Cable4
Main Box
Controller5 Motor & Hub
1. Airfoil retainers packed in bag with Installation Guide. Winglet hardware packed in winglet box. Guy wires (if ordered) are bagged
separately in main box.
2. Powerfoil™ or PowerfoilPlus™ models only.
3. Only included if ordered. If extension tube is 4 ft or longer, it will be shipped in a separate box.
4. Safety cable is attached to extension tube or packed separately if extension tube was not ordered.
5. Either the small (24D) or large (29) KBDA controller is included with the fan. Allen Bradley controller is optional.
(2) Hardware1
OL
JOG
REM
FWD REV STOP LOC/REM
PGM
Hz
AC MOTOR SPEED CONTROL
RUN
STOP RESET
JOG
LOC/REM
PROGRAM
DISPLAY
READ
ENTER
OL
JOG
REM
FWD REV STOP LOC/REM
PGM
Hz
AC MOTOR SPEED CONTROL
RUN
STOP RESET
JOG
LOC/REM
PROGRAM
DISPLAY
READ
ENTER

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8’ - 24’ POWERFOILPLUS™, POWERFOIL™, & WICKERBILL FANS
Mounting
(2) Beam Clip & (2)
Spacer
Upper Yoke (2) Lower Yoke
Motor & Hub Extension Tube, Safety Cable2, &
Shackle3
Hardware
Beam Clip Hardware
(4) 1/2-13 x 2” GR 8 Bolt
(8) 1/2” Flat Washer
(4) 1/2-13 Nylock Nut
Single Pivot Hardware
(2) 1/2-13 x 5” GR 8 Bolt
(4) 1/2” Flat Washer
(2) 1/2-13 Nylock Nut
Lower Yoke Hardware
(2) 1/2-13 x 5” GR 8 Bolt
(4) 1/2” Flat Washer
(2) 1/2-13 Nylock Nut
Motor Hub Hardware
(4) 1/2-13 x 1 3/4” GR 8 Bolt
(8) 1/2” Flat Washer
(4) 1/2-13 Nylock Nut
Winglet Hardware
(10) 10-24 x 1/2” Bolt
(10) 10-24 x 3/4” Barrel
Airfoil Hardware
(20) 5/16-18 x 2” GR 8 Bolt
(40) 5/16” Flat Washer
(20) 5/16-18 Nylock Nut
(4) Gripple/Eyebolt Hardware1
(1) Locking Carabiner
(1) 1/4” Beam Clip
(1) 1/4-20 x 1” Eyebolt
(1) 1/4-20 Hex Nut
(1) Gripple®
(1) Guy Wire
(2) Wire Rope Clip
Parts Included
NOTE: Drawings below are not to scale.
1. Guy wires are designed to constrain fan’s lateral movement and are only included in some fan packages. Big Ass Fans
recommends using guy wires if the if the fan’s extension tube is 4 ft or longer, if the fan is exposed to high winds, or if the fan is
close to any building xtures. Gripple/Eyebolt hardware is bagged separately from hardware boards.
2. Safety cable is attached to extension tube or packed separately if extension tube was not ordered.
3. Shackle included on hardware boards.
4. Powerfoil™ model only.
5. PowerfoilPlus™ model only.
Airfoils
(10) Airfoils
(10) Powerfoil™
Winglets4
(10) PowerfoilPlus™
Winglets5
(10) Airfoil Retainers

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8’ - 24’ POWERFOILPLUS™, POWERFOIL™, & WICKERBILL FANS
Recommended Torque
Application Thread Size Torque
Mounting Bolts 1/2-13’’ UNC 40 ft·lbf (54.2 N·m)
Airfoil Bolts 5/16-18’’ UNC 29 ft·lbf (39 N·m)
Important Weights
Part Weight Part Weight
Single Pivot
Mounting Kit (7/10) 32 lbs (14 kg) 8 ft Wickerbill foils 52 lbs (23 kg)
8 ft Standard foils 52 lbs (23 kg)
Single Pivot
Mounting Kit (10/15) 37 lbs (16 kg) 8 ft Powerfoil foils 62 lbs (28 kg)
10 ft Wickerbill foils 67 lbs (30 kg)
1 ft Extension 4 lbs (2 kg) 10 ft Standard foils 67 lbs (30 kg)
2 ft Extension 8 lbs (4 kg) 10 ft Powerfoil foils 80 lbs (36 kg)
3 ft Extension 13 lbs (6 kg) 12 ft Wickerbill foils 78 lbs (35 kg)
4 ft Extension 17 lbs (8 kg) 12 ft Standard foils 78 lbs (35 kg)
5 ft Extension 21 lbs (10 kg) 12 ft Powerfoil foils 94 lbs (42 kg)
6 ft Extension 25 lbs (11 kg) 14 ft Wickerbill foils 91 lbs (41 kg)
7 ft Extension 29 lbs (13 kg) 14 ft Standard foils 91 lbs (41 kg)
8 ft Extension 33 lbs (15 kg) 14 ft Powerfoil foils 110 lbs (49 kg)
9 ft Extension 37 lbs (17 kg) 16 ft Wickerbill foils 105 lbs (47 kg)
10 ft Extension 42 lbs (19 kg) 16 ft Standard foils 100 lbs (45 kg)
KBDA-24D Controller 6 lbs (2.7 kg) 16 ft Powerfoil foils 127 lbs (57 kg)
KBDA-29 Controller 11 lbs (5.9 kg) 18 ft Wickerbill foils 116 lbs (52 kg)
24 ft Wickerbill foils 160 lbs (72 kg)
24 ft Standard foils 150 lbs (68 kg)
24 ft Powerfoil foils 195 lbs (88 kg)
Tools Needed
Mechanical Installation Electrical Installation
Standard Wrench Set Phillips and Flat Head Screwdriver
Standard Socket Set with Ratchet 1/4” Nut Driver
Torque Wrench capable of 40 ft·lbf (54.2 N·m) 5/16” Nut Driver
Phillips and Flat Head Screwdriver Pair of #10 to #14AWG Crimpers
Standard and Metric Allen Wrench Set Pair of Medium Size Channel Locks
Multimeter

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8’ - 24’ POWERFOILPLUS™, POWERFOIL™, & WICKERBILL FANS
Fan Diagram
A. Safety Cable. A redundant safety feature that secures the fan to
the mounting structure.
B. Upper Yoke. Secures the fan to the mounting structure and allows
the fan to adjust its center of gravity.
C. Extension Tube. Extends the fan from the ceiling.
D. Lower Yoke. Connects motor & hub assembly to mounting
assembly.
E. Motor (see p. 2 for details)
F. Airfoil. Provides air movement. In the event of a collision, safety
retainers secure the airfoils to the fan hub.
G. Winglet. Improves the efciency of the fan by reducing drag.
Winglets are only included with Powerfoil™ and PowerfoilPlus™
models (PowerfoilPlus™ winglets not shown).

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Allen-Bradley Controller Diagram (Optional)
A. VFD. The Variable Frequency Drive (VFD) controls AC power to the motor.
B. Fuses. Protects the system from power surges and over-current.
C. Disconnect. Emergency disconnect for the fan controller.
D. Load Reactor (AB575 only)

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Preparing the Work Site
Mechanical Installation
• A 24 ft (7.3 m) Powerfoil fan (our largest model) weighs, at maximum, 415 lbs (188 kg). A scissor lift, or other suitable means for
lifting the weight of the fan, and up to two (2) 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
starting on p. 11. Do not mount the fan to single purlins, trusses, or bar joists. Consult a structural engineer for installation methods
not covered in this manual.
CAUTION: Mount fan only to an
angle iron or I-Beam. Angle Iron
I-Beam
• To reduce the risk of injury to persons, install the fan so that the blades are at least 10 ft (3.05 m) above the oor.
• The fan installation area must be free of obstructions such as lights, cables, sprinklers, or other building structure. The fan blades
should have at least 2 ft (0.61 m) of clearance from any obstructions.
• Do not install the fan where it will be continuously subjected to high winds, such as under a high velocity HVAC system. The
distance between the fan and the HVAC equipment (or other air-moving equipment) should be no less than 2x the fan’s diameter
when measured from the center of the fan to the equipment.
• The distance between multiple fans should be no less than 2.5x the fans’ diameter when measured from the centers of the fans.
• The mounting system must be able to withstand the torque forces generated by the fan. A 24 ft diameter fan generates nearly 300
ft·lbf (406.7 N·m) of torque during operation.
• Fans mounted on lightweight I-beams (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 a stiffening strut to a nearby beam.
• If the fan’s extension tube is 4 ft (1.2 m) or longer, the fan’s lateral movement must be secured using guy wires (see p. 21 for more
information). If the fan is close to any building xtures it is recommended to secure the fan with guy wires as a safety measure.
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 70-1999, and all local codes.
• Acceptable Unshielded Cable Types: Stranded THHN / THNW, rated for 600V & 158°F-194°F (75°-90°C) in metallic conduit.
• Acceptable Shielded Cable Types: RHH / RHW-2, rated for 600V & 158°F-194°F (75° to 90°C); Belden 29501 through 29507; RHH
/ RHW-2, tray rated for 600V & 158°F-194°F (75°-90°C); Shawex 2ACD / 3ACD or equivalent.
• MC cable (stranded or solid core) may not be used for fan output/motor input leads.
• The motor leads from the fan control to the fan cannot be greater than 400 ft (121.9 m).
• The fan must be visible from its controller unless a suitable means of disconnect is used at the motor.
• The output/motor leads cannot share the same conduit or piping as the AC power supply. AC supply feeds for one fan controller
can share the same conduit with AC supply feeds for one or more controllers.
• AC supply feeds for a fan controller and the output/motor leads for the same fan may not share a conduit.
• AC supply feeds for one fan controller may not share conduit with output/motor leads from one or more controllers/VFDs.
• All unused conductors that share a conduit with the AC supply feeds must be grounded on both ends.
• Controller output/motor input leads canot share a conduit with any other controller’s output/motor leads.
• Controller output/motor input leads cannot share a conduit with any other controller’s AC supply feed.

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Understanding Airow Patterns
Airow with Streamlined Obstruction
Obstructions on the oor tend to block the
horizontally moving air. Thin or streamlined
obstructions do not block much airow,
regardless of size. The air tends to ow
smoothly around these obstructions, losing little
momentum, and leaving only a small stagnant
area behind the obstruction.
Airow with Wide, Blunt Obstruction
A wide, blunt, or at-faced obstruction forces
the air to change direction, turning upward and
outward. There is a stagnant area behind these
obstructions that is wider and higher than the
obstructions themselves.
Airow in an Enclosed Area
The oor jet radiates outward until it reaches
the walls. The walls deect the jet upward. The
ceiling then turns the upward ow inward, back
toward the low pressure area above the fan
where it is pulled back toward the oor. This
creates a convection-like air current that gathers
momentum. Once this current is established,
the fan begins to move air outside of the current
as well and escalates the cooling effects of the
fan.
Airow in an Open Area
The airow moves from the fan toward the oor.
Once the airow hits the oor, it moves outward
in all directions. When airow is deected off of
the oor it is called a oor jet. The depth of this
oor jet varies depending on the size and speed
of the fan. A 20 ft (6 m) Big Ass Fan at standard
speed creates a oor jet 9 ft (2.7 m) deep.
Airow with Multiple Fans
Where there are multiple fans appropriately
spaced, the expanding jets of adjacent
fans meet to create a pressure zone. The
pressure zone acts like a wall, causing each
fan to behave more like a single enclosed
fan. Typically, a single fan’s performance will
increase when working in conjunction with other
fans.

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Understanding Airow Patterns (cont.)
Overhead View
Overhead View
Side View
PowerfoilPlus™
The PowerfoilPlus hybrid airfoil creates a jet of air that
ows outward from the fan at a 45° angle, ignoring oor
obstructions and delivering airow in a much broader
pattern. The airow generated from a 24 ft PowerfoilPlus fan
can effectively cool an area up to 168 ft away from the fan.
The same principles of airow apply to the PowerfoilPlus,
but, when planning fan placement, consider its much larger
coverage area as illustrated in the diagrams on the previous
page.
Tips
Below are some techniques that can make a dramatic difference in congested areas of your facility. You can treat air like water and
scoop, direct, and channel it right where you need it most. If you are using a PowerfoilPlus fan, you will notice that it delivers air from a
much higher angle, overcoming many of the obstacles outlined below.
• Make sure people are not hidden behind structures that block airow. This may seem obvious, but work areas are routinely blocked
by shelving, crates, and machinery.
• Position large obstructions so that their smallest prole is perpendicular to the direction of air movement. For example, a sheet
metal press brake might have ve times the frontal area if it is facing the airow rather than if it is turned sideways.
• Wherever possible, position welding curtains, partitions, sheet materials, etc., in a way that scoops air into the work area rather
than deects it away.
• Take advantage of the air moving near the oor by creating ground level openings in your work area. It is better to have a work
area blocked by materials stacked to the ceiling with an opening below than to have low stacks 3 ft (0.9 m) to 6 ft (1.8 m) high
sitting on the oor.

11
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8’ - 24’ POWERFOILPLUS™, POWERFOIL™, & WICKERBILL FANS
Mounting Method 1: I-Beam
Big Ass Fans can only be hung from an I-beam or angle irons. See the following page for angle iron
mounting instructions. Consult a structural engineer for installation methods not covered in this manual.
WARNING: WARNING: The fan should not be installed unless the structure on which the fan is to be mounted is of sound
construction, undamaged, and capable of supporting the loads of the fan and the method of attachment to the structure. A
structural engineer should verify that the structure is adequate prior to fan installation. Verifying the stability of the mounting
structure is the sole responsibility of the customer and/or end user, and Big Ass Fans hereby expressly disclaims any
liability arising therefrom, or arising from the use of any materials or hardware other than those supplied by Big Ass Fans or
otherwise specied in these installation instructions.
ATTENTION: The I-beam on which the fan will mount must be part of the existing building structure.
1. Attach Upper Yoke (to I-Beam)
Measure the ange width of the I-beam from which the fan will be hung. Consult the tables and diagram below to determine what size
upper yoke is included with your fan package. Select the upper yoke mounting holes that match the ange width of the I-beam.
CAUTION: Install the spacers only if the thickness of the I-beam ange exceeds 3/8” (1 cm). The mounting holes on the
spacer are closer to one side than the other. Make sure this side is facing the I-beam.
Secure the upper yoke to the I-beam with the Beam Clip Hardware as shown. Tighten the bolts to 40 ft·lbf (54.2 N·m) using a 3/4”
socket with torque wrench.
Proceed to “Hanging the Fan” (p. 18).
Beam Clip Hardware (BAF-Supplied):
a. (4) 1/2-13 x 2” GR 8 Bolt
b. (8) 1/2’’ Flat Washer
c. (4) 1/2-13 Nylock Nut
d. (2) Beam Clamp
e. (2) Spacer
Small Upper Yoke
13 1/4’’ (33.7 cm) x 9 5/8” (24.4 cm)
I-Beam
Flange Width
Upper Yoke
Mounting Holes
5” (12.7 cm) -
6 5/8” (16.8cm) inner holes
>6 5/8” (16.8 cm) -
8 1/4” (21 cm) middle holes
>8 1/4”(21 cm) -
9 7/8”(25 cm) outer holes
Large Upper Yoke
18’’ (45.7 cm) x 9 5/8” (24.4 cm)
I-Beam
Flange Width
Upper Yoke
Mounting Holes
9 7/8” (25 cm) -
11 3/8” (28.9 cm) inner holes
>11 3/8” (28.9 cm) -
13” (33 cm) middle holes
>13” (33 cm) -
14 5/8” (37.1 cm) outer holes
Upper Yoke
(top view)
outer hole
middle hole
inner hole
outer hole
middle hole
inner hole
Upper Yoke
(top view)
outer holes
inner holes
middle holes
Side View
b
a
c
b
e
d

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1. Select Proper Angle Irons
NOTE: Angle irons and angle iron hardware are not included with the fan.
CAUTION: Do not install the fan from a single purlin, truss, or bar joist.
CAUTION: Unsupported angle iron spans should not exceed 12 ft (3.7 m).
Follow the table below when selecting angle irons for fan installation.
Height
Width
Ø 9/16”
(1.4 cm)
Thickness:
1/4” (6 mm)
Angle Iron Side View
(see table for dimensions)
Thickness
Angle Iron Span
(between mounting points)
Minimum Angle Iron Dimensions
(W x H x T)
Number of Angle
Irons Needed
6 ft (1.8 m) or less 2.5” (6.4 cm) x 2.5” (6.4 cm) x .25” (0.6 cm) 2
over 6 ft (1.8 m)-8 ft (2.4 m) 3” (7.6 cm) x 3” (7.6 cm) x .25” (0.6 cm) 2
over 8 ft (2.4 m)-12 ft (3.7 m) 3” (7.6 cm) x 3” (7.6 cm) x .25” (0.6 cm) 4*
*2 pairs of angle irons. Pairs should be placed back to back and fastened in center (see step 2).
Mounting Method 2: Angle Irons
If you are installing the fan to an I-beam and have attached the upper yoke (p. 11), proceed to “Hanging the Fan”
(p. 18).
WARNING: The fan should not be installed unless the structure on which the fan is to be mounted is of sound construction,
undamaged, and capable of supporting the loads of the fan and the method of attachment to the structure. A structural
engineer should verify that the structure is adequate prior to fan installation. Verifying the stability of the mounting structure
is the sole responsibility of the customer and/or end user, and Big Ass Fans hereby expressly disclaims any liability arising
therefrom, or arising from the use of any materials or hardware other than those supplied by Big Ass Fans or otherwise
specied in these installation instructions.
WARNING: Never use beam clamps when mounting the fan to angle irons! Beam clamps are only intended for I-beam
installations.

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Mounting Method 2: Angle Irons (cont.)
3. Fasten Angle Irons Together (if span is longer than 8 ft)
If the angle iron span is 8 ft (2.4 m) or less,
proceed to step 4a on the following page.
If the angle iron span is longer than 8 ft (2.4 m), it is necessary to
use double angle irons.
Locate the center of the angle iron length. Drill Ø 9/16” (1.4 cm) hole
through the center of the vertical wall of the angle iron. Drill a total of
four (4) angle irons.
Place two drilled angle irons back to back. Fasten the angle irons
together with customer-supplied Grade 8 hardware.
Align the angle irons to each other and tighten the bolts to 40 ft·lbf
(54.2 N·m) using a 3/4” socket with torque wrench.
Repeat step for remaining two (2) angle irons.
Proceed to step 4b.
Grade 8 Hardware (Customer-supplied):
a. (2) 1/2-13 Bolt
b. (4) 1/2” Washers
c. (2) 1/2” Nut
Side View
ab bc
2. Pre-drill Angle Irons
Determine the mounting method that will be used for your fan. If the fan will be mounted with an extension tube, drill two Ø 9/16”(1.4
cm) holes exactly 5 3/8” (13.7 cm) apart in the centers of two (2) angle irons. If the motor frame will be mounted directly to the angle
irons, drill two Ø 9/16” (1.4 cm) holes exactly 5 1/2” (14 cm) apart in the centers of two angle irons.
Measure the distance between the mounting points of the roof structure that the angle irons will span. Measure the same distance on
the angle irons and drill Ø 9/16” (1.4 cm) holes through each end of the angle irons. Drill holes in two angle irons if span is 8 ft (2.4 m)
or less. Drill holes in four (4) angle irons if span is greater than 8 ft (2.4 m).

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4a. Fasten Single Angle Irons to Roof Structure Mounting Points
If installation requires double angle irons (i.e., span is greater than 8 ft [2.4 m]), proceed to step 4b.
CAUTION: Do not install the fan from a single purlin, truss, or bar joist.
CAUTION: The angle irons must be fastened to the roof structure at each end.
Fasten the angle irons to the roof structure mounting points at each end with customer-supplied Grade 8 hardware as shown.
ATTENTION: Do not tighten the hardware until the fan has been mounted to the angle irons.
Proceed to step 5.
Grade 8 Hardware (Customer-supplied):
a. (4) 1/2-13 Bolt
b. (8) 1/2” Washers
c. (4) 3” Square Washer (BAF-supplied; see diagram)
d. (4) 1/2” Nut
3”
(7.6 cm)
3”
(7.6 cm)
Ø 9/16”
(1.4 cm)
Thickness:
1/4” (6 mm)
Square Washer
b
a
c
b
d
Mounting Method 2: Angle Irons (cont.)