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WWW.BIGASSFANS.COM ©2010 DELTA T CORP. DBA BIG ASS FAN ALL RIGHTS RESERVED
8’ - 24’ POWERFOILPLUS™, POWERFOIL™, & WICKERBILL FANS
Electrical Installation
Electrical Installation Safety
WARNING: To reduce the risk of electric shock, wiring should be performed by a qualified electrician! Incorrect assembly can
cause electric shock or damage the motor and the controller! Hazard of electrical shock!
WARNING: The installation of a Big Ass Fan must be in accordance with the requirements specified 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 which 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 if
installed (L1, L2/N, L3). Wait three (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: An incorrectly installed controller can result in component damage or reduction in the fan’s life. Wiring or
application errors such as under-sizing the controller, incorrect or inadequate AC supply, or excessive ambient temperatures
may result in a malfunction of the fan system. Verify correct voltage, phase, and horsepower before beginning installation!
WARNING: 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.
CAUTION: For use with manufacturer supplied variable frequency drive only. Not for use with other speed control devices!
CAUTION: Shielded cable, if applicable, must be landed on motor’s ground terminal!
CAUTION: To avoid a short circuit, be very careful not to get metal chips in the control!
CAUTION: The Big Ass Fans product warranty will not cover equipment damage or failure that is caused by improper
installation.
Electrical Installation Overview
It is the sole responsibility of the installer to verify the operating voltage of the fan system prior to installation! It is also mandatory that
the installer verify that fan blades, motor hub assemblies, and fan controllers are matched properly at the time of installation, especially
where multiple fan systems will be installed.
The electrical installation section is intended for a professional electrician. If you are unfamiliar or uncomfortable with installing electrical
components, do not attempt to install the fan without an electrician. Serious personal injury or damage to the fan and other equipment
could result.
The guide provided here is a merely a recommendation of proper installation. Adhering to national and local electrical codes is your
responsibility.
The following sections of this chapter will outline how to prepare for the electrical installation, including the required cables and how
to properly route the cabling through conduit, how to properly ground the fan system, how to properly wire the fan controller, how to
properly wire the fan motor, and proper startup procedures.
Power Requirements for Big Ass Fans Controllers
CAUTION: It is the sole responsibility of the installer to verify the operating voltage of the fan system prior to installation! It is
also mandatory that the installer verify that fan blades, motor hub assemblies, and fan controllers are matched properly at the
time of installation, especially where multiple fan systems will be installed.
The power requirements for all Big Ass Fans controllers are listed in the chart on the following page. If multiple controls are connected
to one feeder circuit, the circuit required is the sum of the feeder circuit requirements listed on the chart. For example, if two MC, 230-3-
KB-1-2.0 controllers are connected to a single feeder circuit, that circuit needs to be rated for 30 Amps. This type of installation will also
require that each fan control be installed downstream of a dedicated over-current protection device.