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Electrical
Before connecting power to the heater, read and understand this entire section. Wiring diagrams are furnished with each fan by the factory, and are attached to the door of the unit.
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.
Electrical wiring must be done in accordance with local ordinances and the National Electric Code,
ANSI/NFPA70. Be sure the voltage and phase of the power supply and the wire amperage capacity conform to those listed on 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 heater. Lock and tag the disconnect switch or breaker to prevent accidental power-up.
2. A dedicated circuit should supply the unit ’s electrical disconnect with circuit protection, according to the
National Electric Code.
3. Make certain that the power source is compatible with the requirements of your equipment. The heater nameplate identifies the proper phase and voltage of the motor.
4. Units shipped with an optional remote panel have two electrical circuit drops. It is important to run the motor wires in a conduit separate from the remote control wiring. The DC wires from the unit temperature controller, located in the control drop, should be either in shielded cable or run in a separate conduit.
5. Before connecting the heater to the building power source, verify the power line wiring is de-energized.
6. Secure the power cables to prevent contact with sharp objects.
7. Do not kink the power cable and never allow the cable to come into contact with oil, grease, hot surfaces or chemicals.
8. Before powering up the heater, check the fan wheel for free rotation and make sure that the interior of the heater is free of loose debris or shipping materials.
9. If necessary, the original wire supplied with the heater may be replaced with type TW wire or the equivalent.
Copper Wire Ampacity
Wire Size AWG Maximum Amps
14 20
12
10
8
6
4
25
30
40
55
70
11
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