Bigassfans Basic 6 User manual

INSTALLATION
GUIDE
For help, call 1 (877) BIG-FANS
or visit www.bigassfans.com
Basic 6®

12’–24’ BASIC 6®
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Installation Checklist
Did a structural engineer approve the mounting structure? See page 7 for Big Ass Fans approved
mounting structures.
Do you have the correct safety cable? Are you familiar with its use? See page 18 for information
on properly securing the safety cable.
Will the fan be installed so that the airfoils are at least 10 ft (3.05 m) above the oor?
Will the fan be installed so that the airfoils 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)? If the fan is mounted at the same level or higher than the diffuser, the
winglets must be at a distance that is at least 1x the measure of the fan’s diameter. If the fan is mounted
at the same height or below the diffuser, the winglets must be at a distance that is at least 2x the
measure of the fan’s diameter.
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 page 10 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 are labeled, “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?
Do you have the correct power circuit for the fan controller? See page 2 for information on
selecting the correct circuit/fuse for the fan controller.
Customer Service: 1-877-BIG-FANS
(International: [phone])

12’–24’ BASIC 6®
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12’–24’ BASIC 6®
Installation Guide
12’–24’ Basic 6®
Installation Guide:
Apr. 2015
Rev. P
Basic 6 and the Basic 6 logo are trademarks of Delta T Corporation, registered in the United States and/or other countries. All other trademarks used herein are the properties of their
respective owners. No part of this document may be reproduced or translated into a different language without the prior written consent of Big Ass Fans. The information contained in this
document is subject to change without notice. For the most up-to-date information, see the online Basic 6 Installation Guide at www.bigassfans.com.
www.bigasssolutions.com/patents
This product was manufactured in a plant whose Management
System is certied as being in conformity with ISO 9001:2008. Conforms to ANSI/UL STD 507: Electric Fans
Certied to CAN/CSA C22.2 No.113: Fans & Ventilators
Contact Information
Manufacturing
2425 Merchant Street
Lexington, KY 40511
1-877-BIG-FANS
www.bigassfans.com
Customer Service
2348 Innovation Drive
Lexington, KY 40511
1-877-BIG-FANS
Intl.: [phone]
www.bigassfans.com
Warranty Returns
800 Winchester Road
Lexington, KY 40505
1-877-BIG-FANS
www.bigassfans.com
Australia Ofce
Unit 22, 1029 Manly Road
Tingalpa QLD 4173, Australia
[phone]
www.bigassfans.com/au

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ii
IMPORTANT SAFETY INSTRUCTIONS
READ AND SAVE THESE INSTRUCTIONS
TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:
WARNING: Installation work and electrical wiring must be done by qualied person(s) in accordance with all applicable codes
and standards.
WARNING: 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 70-2011, 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. 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 if you have any
questions regarding the electrical installation of this fan.
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: Use this unit only in the manner intended by the manufacturer. If you have questions, contact the manufacturer.
WARNING: 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 airfoils when installing, adjusting, or cleaning the fan. Do not insert foreign objects between
rotating airfoils.
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 caused by improper installation.
Leave this installation guide with the owner of the fan after installation is complete.
WARNING: This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of
the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the
appliance.
ATTENTION: If installing the fan in the United States, the fan must be installed per the following National Fire Protection
Association (NFPA) guidelines:
• The fan must be centered approximately between four adjacent sprinklers.
• The vertical distance from the fan to the sprinkler deector must be at least 3 ft (91.4 cm).
• The fan must be interlocked to shut down immediately upon receiving a waterow signal from the alarm system.

12’–24’ BASIC 6®
Mounting Reference Guide
The following is intended as a reference guide for Basic 6®fan mounting methods. See the referenced pages for complete fan installation and operating instructions. Consult a structural engineer to determine which mounting method best suits your building structure.
Bar Joists
See page 10 for mounting instructions.
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See page 12 for mounting instructions.
I-Beam Z-Purlins
See complete instructions included with the Z-Purlin Installation Kit.
See complete instructions included with the Compound Angle Mount Installation Kit.
Solid Beam
See complete instructions included with the L-Bracket Installation Kit.
I-Beam (Angled)

Notes

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12’–24’ BASIC 6®
Contents
Introduction Safety Instructions ii
Mounting Reference Guide iii
Thank You 1
About Big Ass Fans 1
Pre-Installation About this Fan 2
What’s in the Box 3
Parts Included 4
Tools Needed 5
Understanding Roof Pitch 5
Fan Diagram 6
Preparing the Work Site 7
Understanding Airow Patterns 8
Mounting Structure:
I-Beam
1. Measure I-Beam Width 10
2. Attach Upper Yoke (to I-Beam) 11
Mounting Structure:
Bar Joists
1. Select Proper Angle Irons 12
2. Pre-drill Angle Irons 13
3. Fasten Angle Irons Together (if span is longer than 8 ft) 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 Main Fan Unit (to Angle Irons) 17
Hanging the Fan 1. Attach Extension Tube (to Upper Yoke) 18
2. Secure Safety Cable 18
3. Attach Lower Yoke (to Extension Tube) 19
4. Attach Main Fan Unit (to Lower Yoke) 19
5. Conrm Orientation 19
Installing Guy Wires 1. Attach Locking Carabiners to Main Fan Unit 20
2. Attach Beam Clamp 20
3. Route Guy Wire through Gripple®21
4. Install Remaining Guy Wires 21
Installing Airfoils 1. Attach Winglets to Airfoils 22
2. Attach Airfoils to Hub 22
Electrical Installation Electrical Installation Safety 23
Electrical Installation Overview 24
Controller Storage 24
Power Requirements for Fan Controllers 24
Mounting the Wall Controller 24
Input Power Conditioning 25
Conduit and Piping Guidelines 25
Power Wiring Guidelines 26
Grounding 27
Installing the Electronic Programming Module (EPM) 28
Wiring: ESFR (Early Suppression Fast Response) 29
Wiring: 100–125V/200–250V Single-Phase Fan Controllers 30
Wiring: 200–250V Three-Phase Fan Controllers 31
Wiring: 400–480V & 575–600V Three-Phase Fan Controllers 32
Daisy Chaining 33
Wiring the Motor: 9 Lead, Dual Voltage, Wye Motor Congurations 34
Operating the Fan Controller 35

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Additional Input Power
Considerations
Input Voltage Irregularities 36
Delta Secondary 36
Branch Circuit Protection 37
Operating the Fan Heating Season 38
Cooling Season 38
Preventive Maintenance Annual Preventive Maintenance 39
General Preventive Maintenance 39
Annual Maintenance Checklist 41
Troubleshooting Cutting the Extension Tube 43
General Troubleshooting 43
Troubleshooting the Fan Controller 44
Warranty Return
Instructions
Acknowledgment & Return Instructions 47
Warranty Claim Form Instructions 48
Warranty Claim Form 49
Responsibility Agreement 50
Big Ass Fan Certied
Installers
Check-In Procedure 51
Close-Out Procedure 53

12’–24’ BASIC 6®
1
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12’–24’ BASIC 6®
Introduction
Thank you and congratulations on your purchase of a Big Ass Fan, an efcient and cost-effective way to stay cool in the summer and
warm in the winter. The revolutionary design of our fans combines the best of both form and function to bring power performance
and a sleek look to any setting. More importantly, you have purchased a product that is backed by extensive research, thorough
testing, and quality manufacturing. We’re ready to answer any questions or comments at 1-877-BIG-FANS or visit our Web site at
www.bigassfans.com.
Who we are and what we do
Big Ass Fans has been the preeminent manufacturer of large-diameter, low-speed fans since 1999. With a worldwide presence and
located in beautiful Lexington, KY, we research, design, and manufacture the most effective air movement solutions on the market.
Our never-ending commitment to quality and innovation keeps us at the leading edge of a burgeoning industry. With an eye to helping
customers satisfy their needs, and a strong sense of corporate responsibility to the community, Big Ass Fans has redened the way
business is done.

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2
About this fan
The specications of the fan depend on the size and model.
Technical specications
Fan
size Motor size Gear ratio
Controller
rating
Minimum required
supply circuit size
Nominal
output
voltage, 3Φ*
Maximum full load
current
Power
consumption Max RPM Airfoil length
Suggested
distance
from ceiling
12 ft
(3.6 m)
1.0 hp
(0.75 kW) 15.8 1.0 hp (0.75 kW)
20 A @ 100–125 V, 1 Φ
15 A @ 200–250 V, 1 Φ
10 A @ 200–250 V, 3 Φ
10 A @ 400–480 V, 3 Φ
10 A @ 575–600 V, 3 Φ
240 V
240 V
240 V
480 V
600 V
11.0 A
5.5 A
3.2 A
1.6 A
1.3 A
600 W 111 RPM 64’’
(163 cm) 5 ft (1.5 m)
14 ft
(4.3 m)
1.0 hp
(0.75 kW) 15.8 1.0 hp (0.75 kW)
20 A @ 100–125 V, 1 Φ
15 A @ 200–250 V, 1 Φ
10 A @ 200–250 V, 3 Φ
10 A @ 400–480 V, 3 Φ
10 A @ 575–600 V, 3 Φ
240 V
240 V
240 V
480 V
600 V
11.0 A
5.5 A
3.2 A
1.6 A
1.3 A
660 W 94 RPM 76”
(193 cm) 5 ft (1.5 m)
16 ft
(4.9 m)
1.5 hp
(1.1 kW) 20.0 1.5 hp (1.1 kW)
25 A @ 200–250 V, 1 Φ
15 A @ 200–250 V, 3 Φ
10 A @ 400–480 V, 3 Φ
10 A @ 575–600 V, 3 Φ
240 V
240 V
480 V
600 V
9.8 A
4.9 A
2.4 A
1.9 A
830 W 87 RPM 88’’
(224 cm) 6 ft (1.8 m)
18 ft
(5.5 m)
1.5 hp
(1.1 kW) 20.0 1.5 hp (1.1 kW)
25 A @ 200–250 V, 1 Φ
15 A @ 200–250 V, 3 Φ
10 A @ 400–480 V, 3 Φ
10 A @ 575–600 V, 3 Φ
240 V
240 V
480 V
600 V
9.8 A
4.9 A
2.4 A
1.9 A
1180 W 85 RPM 100”
(254 cm) 6 ft (1.8 m)
20 ft
(6.1 m)
2.0 hp
(1.5 kW) 25.1 2.0 hp (1.5 kW)
25 A @ 200–250 V, 1 Φ
15 A @ 200–250 V, 3 Φ
10 A @ 400–480 V, 3 Φ
10 A @ 575–600 V, 3 Φ
240 V
240 V
480 V
600 V
12.4 A
6.2 A
3.2 A
2.6 A
1130 W 69 RPM 112’’
(284 cm) 7 ft (2.1 m)
24 ft
(7.3 m)
2.0 hp
(1.5 kW) 28.3 2.0 hp (1.5 kW)
25 A @ 200–250 V, 1 Φ
15 A @ 200–250 V, 3 Φ
10 A @ 400–480 V, 3 Φ
10 A @ 575–600 V, 3 Φ
240 V
240 V
480 V
600 V
12.4 A
6.2 A
3.2 A
2.6 A
1400 W 61 RPM 136’’
(345 cm) 7 ft (2.1 m)
* Output voltage will not exceed Input voltage, with the exception of 120 V models. All controllers produce 3 Φ output power, regardless of input phase.
Motor
• 1 to 2 hp motor
• NEMA Design B
• 208/230/460 Volts AC
• 1725 RPM
• 60 Hz, 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 contaminants out
• Lubricated for life with synthetic oil
Pre-Installation

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12’–24’ BASIC 6®
(6) Airfoils
Airfoil Box
What’s in the box
The fan is shipped in multiple boxes. The large box contains the main fan unit, upper yoke (with beam clips and spacers), lower yoke,
extension tube (if 3 ft or shorter) with attached safety cable, winglets, 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.
Note: Dashed lines indicate internal boxes. Drawings below are not to scale.
(2) Lower Yoke
(2) Beam Clip &
(2) Spacer Upper Yoke1
(6) Winglet
Extension Tube4
& Safety Cable5
Main Box
Controller Main Fan Unit
1. The upper yoke may differ from the illustration. Conrm you have the appropriate upper yoke for your roof pitch (page 5).
2. This installation guide is also packaged in the box with the hardware and airfoil retainers. If your order includes yokes and an extension tube, square
washers will also be packaged in this box. Square washers are needed only if you are mounting the fan to angle irons. The number of square
washers needed depends on the number of angle irons that will be used. Winglet hardware is packed in the winglet box. Guy wires (if ordered) are
bagged separately in the main box.
3. Fire relay not shown.
4. The extension tube is only included if ordered. If extension tube is 4 ft or longer, it will be shipped in a separate box.
5. Safety cable is attached to extension tube or packed separately if extension tube was not ordered.
Pre-Installation (cont.)
(1) EPM &
Fire Relay3
(2) Hardware & (6) Airfoil Retainers2
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.

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Mounting
(2) Beam Clip & (2)
Spacer
Upper Yoke3(2) Lower Yoke
Main Fan Unit Extension Tube, Safety Cable4, &
Shackle5
Hardware1
Upper Yoke Hardware
(4) 1/2-13 x 2” GR 8 Bolt
(8) 1/2” Flat Washer
(4) 1/2-13 Nylock Nut
Extension Tube Hardware
(2) 1/2-13 x 4-1/2” GR 8 Bolt
(4) 1/2” Flat Washer
(2) 1/2-13 Nylock Nut
Lower Yoke Hardware
(2) 1/2-13 x 4-1/2” GR 8 Bolt
(4) 1/2” Flat Washer
(2) 1/2-13 Nylock Nut
Main Fan Unit 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
(6) 10-24 x 1/2” Bolt
(6) 10-24 x 3/4” Barrel
Airfoil Hardware
(12) 5/16-18 x 2” GR 8 Bolt
(24) 5/16” Flat Washer
(12) 5/16-18 Nylock Nut
Guy Wire Hardware2
(8) Locking Carabiner
(4) 1/4” Beam Clip
(4) 1/4-20 x 1” Eyebolt
(4) 1/4-20 Hex Nut
(4) Gripple®
(4) Guy Wire
(8) Wire Rope Clip
Parts included
Note: The drawings below are not to scale. Note: No hardware substitutions are acceptable.
1. If your order includes yokes and an extension tube, square washers will be included in your
hardware. Square washers are needed only if you are mounting the fan to angle irons. The
number of square washers needed depends on the number of angle irons that will be used.
2. 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 similar conditions, or if the fan is close to any building
xtures. Guy Wire Hardware is bagged separately from hardware boards.
3. The upper yoke may differ from the illustration. Conrm you have the appropriate upper yoke for
your roof pitch (page 5).
4. Safety cable is attached to extension tube or packed separately if extension tube was not ordered.
5. Shackle included on hardware boards.
6. Fire Relay not shown. If multiple fans are to be installed, ensure to install the exact EPM included
in the fan’s packaging. EPMs are not interchangeable!
Airfoils
(6) Airfoils
(6) Powerfoil®
Winglets
(6) Airfoil Retainers
Pre-Installation (cont.)
Electrical
Wall Controller EPM & Fire Relay6

12’–24’ BASIC 6®
5
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12’–24’ BASIC 6®
Tools needed
Big Ass Fans recommends gathering the following tools prior to beginning installation.
Mechanical installation Electrical installation
Standard wrench set Phillips and at head screwdriver
Standard socket set and ratchet 1/4” nut driver
Torque wrench capable of 40 ft·lb (54.2 N·m) 5/16” nut driver
Phillips and at head screwdriver Pair of #10 to #14 AWG strippers
Standard allen wrench set Pair of medium channel locks
Multimeter
Pre-Installation (cont.)
Understanding roof pitch
To ensure the fan is properly mounted, the fan must always hang plumb to the ground and the yoke must be installed using the bolt
holes at the widest locations possible. To accommodate building structures on which the standard upper yoke does not allow the fan to
properly orient itself, the 90-Degree Offset mount should be purchased.
The example below shows one situation in which the 90-Degree Offset mount must be used so that the fan hangs plumb to the ground
and the widest stance for the upper yoke is ensured. If you are uncertain of your roof pitch or do not have the correct mount to properly
hang your fan, consult a structural engineer or contact Big Ass Fans Customer Service.
90-Degree Offset MountStandard Upper Yoke
Before beginning installation, conrm that you have the appropriate mount for your roof pitch.

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6
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. Note: The upper yoke may
differ from the illustration below.
C. Extension Tube. Extends the fan from the ceiling.
D. Lower Yoke. Connects main fan unit to the extension tube.
E. Motor. See page 2 for technical specications.
F. Hub. Secures the airfoils to the gearbox.
G. Airfoil. Provides air movement. The unique, patented design provides efciency and effective air movement.
H. Winglet. Improves the efciency of the fan.
Pre-Installation (cont.)
F
H
E
C
D
B
A
G

12’–24’ BASIC 6®
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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.

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8
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, which deect the jet upward. After it hits
the ceiling, the upward ow is directed inward
to the low pressure area above the fan where
it is then pulled down 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, escalating its cooling effects.
Airow in an open area
The airow moves from the fan toward the oor.
Once airow hits the oor, it moves outward in
all directions. The deection of air off the oor is
called a “oor jet.”
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 like a single enclosed fan. Typically,
a single fan’s performance will increase when
working in conjunction with other fans.
Pre-Installation (cont.)
Overhead View
Overhead View
Side View
Overhead View
Side View

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12’–24’ BASIC 6®
Pre-Installation (cont.)
Airow tips
Below are some techniques that make a dramatic difference in congested areas of your facility. Treat air like water, and scoop, direct,
and channel it to where it is needed most.
• Make sure people are not hidden behind structures that would 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les are 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., to scoop air into the work area rather than deect it.
• 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.

12’–24’ BASIC 6®
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10 Mounting Structure: I-Beam
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 its method of mounting. 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.
CAUTION: It is not recommended to mount a Big Ass Fan to a fabricated I-beam. Do not direct mount the fan to an I-beam.
The I-beam on which the fan will mount must be part of the existing building structure.
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 edge than the other. Make sure this edge of the spacer is facing the I-beam.
CAUTION: Before beginning installation, conrm that you have the appropriate mount for your roof pitch.
WARNING: Ensure there are no persons below the fan unit during installation!
1. Measure I-beam width
Measure the ange width of the I-beam from which the fan will be hung. Select the upper yoke mounting holes that match the ange
width of the I-beam.
Small Upper Yoke
13-3/4’’ x 10” (349 mm x 258 mm)
I-beam
ange width
Upper yoke
mounting holes
5” (127 mm) to
6-5/8” (168 mm) Inner holes
>6-5/8” (168 mm) to
8-1/4” (210 mm) Middle holes
>8-1/4”(210 mm) to
9-7/8”(250 mm) Outer holes
Large Upper Yoke
18-1/2’’ x 10” (470 mm x 258 mm)
I-beam
ange width
Upper yoke
mounting holes
9-7/8” (250 mm) to
11-3/8” (289 mm) Inner holes
>11-3/8” (289 mm) to
13” (330 mm) Middle holes
>13” (330 mm) to
14-5/8” (371 mm) Outer holes
outer holes
middle holes
inner holes
Upper Yoke
(top view)
Big Ass Fans can only be hung from an I-beam or bar joists. See page 12 for bar joist mounting instructions. Consult a
structural engineer for installation methods not covered in this manual.

12’–24’ BASIC 6®
11
WWW.BIGASSFANS.COM ©2012 DELTA T CORP. ALL RIGHTS RESERVED
12’–24’ BASIC 6®
Mounting Structure: I-Beam (cont.)
2. Attach upper yoke (to I-beam)
Secure the upper yoke to the I-beam with the Beam Clip Hardware as shown.
Note: Spacers are only used if the beam ange exceeds 3/8” (1 cm).
Tighten the bolts to 40 ft·lb (54.2 N·m) using a torque wrench and 3/4” socket.
Upper Yoke 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 Clip
e. (2) Spacer
Proceed to “Hanging the Fan” (page 18).
b
a
c
b
e
d
Side View

12’–24’ BASIC 6®
WWW.BIGASSFANS.COM ©2012 DELTA T CORP. ALL RIGHTS RESERVED
12
1. Select proper angle irons
Follow the table below when selecting angle irons for fan installation. Note: Angle irons and angle iron hardware are not included with
the fan.
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 0.25” (0.6 cm) 2
6 ft (1.8 m) to 8 ft (2.4 m) 3” (7.6 cm) x 3” (7.6 cm) x 0.25” (0.6 cm) 2
8 ft (2.4 m) to 12 ft (3.7 m) 3” (7.6 cm) x 3” (7.6 cm) x 0.25” (0.6 cm) 4*
*Two pairs of angle irons. Pairs should be placed back to back and fastened in center (see step 3).
Mounting Structure: Bar Joists
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 its method of mounting. 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 clips when mounting fans to angle irons! Beam clips are intended for I-beam installations.
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).
CAUTION: The angle irons must be fastened to the roof structure at each end.
Angle Iron Side View
(see table for dimensions)
Width
Height Thickness
6’ (1.8m) or less
over 6’ (1.8m) – 8’ (2.4 m)
over 8’ (2.4 m) – 12’ (3.7 m)
Big Ass Fans can only be hung from an I-beam or bar joists. See page 10 for I-beam mounting instructions. Consult a
structural engineer for installation methods not covered in this manual.