Magic Aire HCA Series, Installation, Operation And Maintenance Manual

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035-000049-001 Page 9 HCA IOM 1.1 8-28-2017
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 heat-
ers.
Failure to follow these warnings could lead to per-
sonal injury or death.
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.
INSTALLATION-ELECTRICAL
INSTALLATION-ELECTRICAL
Typical wiring diagrams are shown on the fol-
lowing pages FOR REFERENCE. Always re-
fer to the wiring diagram on the air handling unit
for actual wiring.
Connect electrical service to unit. Refer to unit
wiring diagram
. NOTE: CHECK MOTOR RAT-
ING PLATE FOR CORRECT LINE VOLTAGE.
For power supply connection, route field power
wiring to Motor Start/Stop Station (MSS) dis-
connect switch (if provided) or motor leads in
the junction box (j-box).
Refer to nameplate FLA, maximum overcurrent
protection 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 overcurrent protection.
NOTE : Motor provided has internal thermal
overload protection. Units ordered Factory
Electric Heat include fan relay or contactor and
disconnect switch located inside the electric
heat control box.