3 Electrical and control settings
Unit electrical wiring and connection
SMGB0137 rev.0 - 05/2021
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3.1.11 DX-Interface electrical wiring
• Connect the electrical wires between the indoor unit and the outdoor unit, as shown in the next diagram.
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Follow the local codes and regulations when performing the electrical wiring.
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Use shielded wires for intermediate wiring to protect the units from noise obstacle at length of less than 300 m and
size in compliance with local codes.
• In the event that a conduit tube for field-wiring is not used, fix rubber bushes to the panel with adhesive.
• All the field wiring and equipment must comply with local and international codes.
• When a cable gland is not used, it must be sealed properly in order to ensure the correct control box sealing.
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C A U T I O N
Pay attention to the connection of the operating line. Incorrect connection may cause PCB failure.
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N O T E
Packing gland diameter specification: 6.0 mm (min) to 12.0 mm (max). If needed, install additional tube insulation or wind with insulation
tape around the wire to make the wire thicker.
Control box terminal board
Terminal board 1
Terminal board 2
(*)
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N O T E
(*) Packing gland for thermistor installation.
