FloAire Modular Packaged Unit - Manual (Page 8)

8
Copper Wire Ampacity
Wire Size AWG Maximum Amps
14 15
12 20
10 30
8 50
6 65
4 85
1. Always disconnect power before working on or near
this unit. Lock and tag the disconnect switch or breaker
to prevent accidental power up.
2. This unit contains 2 or 3 disconnect switches and
multiple wiring connections. 1 disconnect is for the mua
blower. The second disconnect is used for units with 2
condensers. A third disconnect is added for units with 3
condensers. An electrical drop containing the motor
power wiring and a separate
drop containing condenser
power is shipped with every
fan. The electrical drops
should be brought through
one of the conduit openings
located in the base of the unit,
run through the curb and
connected to a junction box
inside the building.
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
following illustration labeled “Fan to Building Wiring Connection”.
4. 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. 3 phase condensers
have circuit boards that protect the compressor from running backwards. The board (located
under the condenser wiring panel) will produce a fault light if the 3 phase input needs to be
reversed to that condenser.
5. Units shipped with an optional remote panel have three electrical circuit drops. It is important to
run the motor wires in a separate conduit from the remote control wiring. The DC wires from the
unit temperature controller, located in the control drop, should either be shielded cable or be run
in a separate conduit.
6. Before connecting unit to the building power source, verify power line wiring is de-energized.
7. Secure the power cables to prevent contact with sharp objects.
8. Do not kink power cable and never allow the cable to come in contact with oil, grease, hot
surfaces or chemicals.
9. Before powering up the heater, check fan wheel for free rotation and make sure that the interior of
the heater is free of loose debris or shipping materials.
10. If any of the original wire supplied with the heater must be replaced, it must be replaced with type
THHN wire or equivalent.