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ELECTRICAL WIRING
WARNING
• Electrical construction should be made with specific mains circuit by qualified personnel according to the installation
instructions. Electric shock and fire may result if the capacity of power supply is not sufficient.
• During wiring layout; specified cables should be used as the mains line in accordance with local and national codes.
Connecting and fastening should be performed reliably to avoid external force on cables. Improper connection or
fasteners may lead to personal injury or fire.
• The equipment must be properly grounded per local and national codes. Unreliable grounding may cause electric shocks.
Do not connect ground lines to gas pipes, water pipes, lightning rods or telephone lines.
ATTENTION
• Only copper conductors can be used. Breakers for current leakage must be provided, or electric shock may occur.
• The wiring of the mains line is of Y type. The power plug L should be connected to the live wire and plug N connected
to null wire while should be connected to the ground wire. For the type with auxiliary electrically heating function, the
live wire and the null wire should not be misconnected, or the surface of electrical heating body will be electrified. If the
power line is damaged, replace it by the professional personnel of the manufacturer or service center.
• The power line of connection kits should be arranged according to the installation instruction of connection kits.
• After connected to the terminal tier, the tubing should be curved into be a U-type elbow and fastened with the
pressing clip.
• The machine can't be powered on before electrical operation. Maintenance should be done while the power is shut down.
• Seal the thread hole with heat insulating materials to avoid condensation.
• Signal line and power line are separately independent, which can't share one line. [Note: the power line, signal line are
provided by users. Parameters for power lines are shown as below: 3×(1.0-1.5) mm2; parameters for signal line:
2×(0.75-1.25)mm2( shielded line)]
• Connection kits and outdoor units should be connected to the power source separately. All connection kits must share
one single electrical source, but its capacity and specifications should be calculated. Indoor & outdoor units should be
equipped with the power leakage breaker and the overflow breaker.
• Connection kit can be installed in multiple, named as unit A, unit B.... Pay attention to the marks on the terminal block
when connecting the outdoor unit with the indoor unit. Refer to wiring example as described in 5-2 while ensuring
correct connection. In addition, the operation will be abnormal when the wiring and the tubing between indoor and
outdoor machine sets are installed in different refrigerant systems.
• Energization is not to be done before it's confirmed that the connection kit have completely installed and that the
outdoor and indoor installation is completed.
The wiring for the power line and signal line of connection kit
• Power cable and communication wire must be fixed firmly.
• Each connection kit must be grounded well.
• Shielded layer of communication wires must be connected together and be grounded at single point.
• Communication wire total length cannot exceed 3280ft.
31-5000593 Rev. 0
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