Magic Aire HHA Series, Installation, Operation And Maintenance Manual

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035-000029-001 Page 8 HHA IOM 1.4 10/11/2021
Typical wiring diagrams are shown on the following
pages FOR REFERENCE. Always refer to the wir-
ing diagram on the air handling unit for actual wiring.
Connect electrical service to unit. Refer to unit wiring
diagram
. NOTE: CHECK MOTOR RATING PLATE
FOR CORRECT LINE VOLTAGE. For power supply
connection, route field power wiring to field-provided
and installed disconnect switch and from switch to
junction box on unit. Unit is internally wired from
junction box to VFD.
Refer to nameplate FLA, maximum overcurrent pro-
tection device (MOPD) and minimum circuit ampacity
(MCA). Also refer to wiring diagram affixed to unit to
make control and power wiring connections.
NOTE : Installer is responsible for power wiring and
branch circuit over current protection.
All field-installed wiring, including the electrical
ground, MUST comply with the National Electri-
cal Code (NEC) as well as applicable local
codes. In addition, all field wiring must conform
to the Class II temperature limitations described
in the NEC.
Refer to factory wiring diagrams installed in the
unit.
CAUTION
Use only copper conductors for field
-installed electrical wiring. Unit ter-
minals are not designed to accept
other types of conductors.
DANGER
WARNING: Hazardous voltage. Only qualified
personnel must install the electrical service. Dis-
connect and Lock Out all incoming power sources
before connecting to electrical service.
WARNING: This appliance must be permanently
grounded in accordance with the National Electrical
Code and local code requirements.
WARNING : For use with copper conductors only.
DANGER
VFD Energy Stored!
Dangerous voltage is present when input power is
connected. After disconnecting power supply
wait
at least 5 minutes before performing any mainte-
nance.
INSTALLATION-ELECTRICAL
DANGER
NEVER enter an enclosed fan cabinet or reach
into a unit while the fan is running.
LOCK OPEN AND TAG the fan motor power dis-
connect switch before working on a fan. Take
fuses with you and note removal on tag. Electric
shock can cause personal injury or death.
LOCK OPEN AND TAG the electric heat coil
power disconnect switch before working on or
near heaters.
TURN OFF POWER to UVC lights before servic-
ing or repairing.
Failure to follow these warnings could lead to
personal injury or death.
Electrical Installation
WARNING
To avoid possible injury or death due to electrical
shock, open the power supply disconnect switch
and secure it in an open position during installation.