Dx-Interface Electrical Wiring - Hitachi RCI-1.0FSN3 Service Manual

4 Electrical wiring
C A U T I O N
If the power cables are to be connected in series, check that the current is below 50 A.
Follow the steps below to connect the power cables to the power terminals in the electrical box:
1 Where necessary, loosen the screws on the power terminals in the electrical box.
2 Connect the power cables to the power terminals in the electrical box.
3 Tighten the screws on the power terminals in the electrical box.
4 Check that the power cables are correctly secured.
Follow the steps below to connect the earth wire to the earth terminal in the electrical box:
1 Where necessary, loosen the screw on the earthing terminal in the electrical box.
2 Connect the shielded part of the earth wire to the earth terminal.
3 Tighten the screw on the earth terminal in the electrical box.
4 Check that the shielded part of the earthing cables are correctly secured.
Firmly secure the cables using a tie inside the electrical box.
Cover the cables and the hole using a sealant to protect them from condensation and insects.
Test runs
C A U T I O N
• Be careful during the test runs, as some of the safety functions remain disabled: the units operate for two
hours without switching off via the thermostat. The three-minute compressor protection is not enabled during
the test.
• Secure the rubber bushes to the panel using adhesive when the outdoor unit ducts are not used.
• The compressor remains at a standstill during forced stoppage.

4.1.11 DX-Interface electrical wiring

• Connect the electrical wires between the indoor unit and the outdoor unit, as shown in the next diagram.
• Follow the local codes and regulations when performing the electrical wiring.
• 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.
C A U T I O N
Pay attention to the connection of the operating line. Incorrect connection may cause PCB failure.
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.
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SMGB0077 rev.0 - 01/2013
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