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Cassette Unit
Electrical Wiring
Wiring Precautions
1. Before obtaining access to terminals, all supply circuits must be disconnected.
2. Improperly installed and grounded field wiring poses fire and electrocution hazards. For
high voltage connections, flexible electrical conduit is recommended whenever vibration
transmission may create a noise problem within the structure. To avoid these hazards, you
MUST follow requirements for field wiring installation and grounding as described in the
National Electrical Codes (NEC) and your local/state electrical codes. All field wiring MUST
be performed by qualified personnel. Failure to follow these requirements could result in
death or serious injury.
1. Before turning on, verify that the voltage is within the 187~252 V range (for single phase
units).
2. Always use a grounded terminal and install a dedicated receptacle to supply power to the
air conditioner. For high voltage connections, flexible electrical conduit is recommended
whenever vibration transmission may create a noise problem within the structure.
3. Use a dedicated breaker and receptacle matched to the capacity of the air conditioner.
4. Indoor units MUST be wired in PARALLEL. Wiring the indoor units in series will result in a
communication error and the system will not operate.
Electrical Cable Connection
Model
4MXC8512B
4MXC8518B
208/230V-60Hz, 1 phase
4MXC8524B
Electrical Notes:
Power Supply
WARNING
Wiring between indoor unit
and outdoor unit
AWG 14 x 4 Stranded
22
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