Electrical – FloAire DMUA User Manual
Page 16
16
Copper Wire Ampacity
Wire Size AWG
Maximum Amps
14
20
12
25
10
30
8
40
6
55
4
70
Electrical
Before connecting power to the fan, read and
understand this entire section of this document. As-built
wiring diagrams are available with each fan by the
factory.
Electrical wiring and connections should be done in
accordance with local ordnances and the National
Electric Code, ANSI/NFPA70. Be sure the voltage and
phase of the power supply and the wire amperage
capacity is in accordance with the motor nameplate. For
additional safety information refer to AMCA publication
410-96, Recommended Safety Practices for Users and
Installers of Industrial and Commercial Fans.
1. Always disconnect power before working on or near
a fan. Lock and tag the disconnect switch or breaker
to prevent accidental power up.
2. A disconnect switch is shipped with every fan. The
switch is located on the exterior of up-blast fans and in
the interior of down-blast fans. On down-blast direct
drive fans, the disconnect function is built into the speed controller.
3. A dedicated branch circuit should supply the motor circuit with short circuit protection according to
the National Electric Code. This dedicated branch should be run to the junction box mentioned
above and connected as shown in a f
ollowing illustration labeled “Fan to Building Wiring
Connection”.
4. Make certain that the power source is compatible with the requirements of your equipment. The
fan nameplate identifies the proper phase and voltage of the motor.
5. Before connecting fan to building power source, verify power line wiring is de-energized.
6. Secure the power cable to prevent contact with sharp objects.
7. Do not kink power cable and never allow the cable to come in contact with oil, grease, hot
surfaces or chemicals.
8. Before powering up fan check fan wheel for free rotation and make sure that the interior of the fan
is free of loose debris or shipping materials.
9. If any of the original wire supplied with the fan must be replaced, it must be replaced with type
TW wire or equivalent.
IMPORTANT: FANS WITH HINGE KITS REQUIRE ENOUGH SLACK IN THE
WIRING TO THE FAN TO ALLOW FAN TO TILT BACK TO THE OPEN POSITION.
ELECTRICIAN MUST CHECK THIS AND ACCOUNT FOR THE RANGE OF MOTION
OF THE FAN.
WARNING!!
Disconnect
power
before
installing or servicing fan. High
voltage
electrical
input
is
needed for this equipment. This
work should be performed by a
qualified electrician.