Electrical Wiring; General Check - Hitachi EXV-serie Installations- Und Betriebshandbuch

ELECTRICAL WIRING

8 ELECTRICAL WIRING

8.1 GENERAL CHECK

1 Ensure that the field-supplied electrical components (mains
power switches, circuit breakers, wires, connectors and wire
terminals) have been properly selected according to the
electrical data indicated. Make sure that they comply with
national and regional electrical codes.
2 Check to ensure that the power supply voltage is within +/-
10% of the rated voltage.
3 Check to ensure that the power supply has an impedance
low enough to guarantee that the starting voltage is at least
85% of the rated voltage.
4 Check to ensure that the ground wire is connected.
5 Connect a fuse of specified capacity.
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D A N G E R
Check to ensure that screws for terminal block are tightly fastened.
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C A U T I O N
• Protect the wires, drain pipe and electrical parts from rats or other
small animals. If not protected, rats may damage unprotected parts,
and in the worst case scenario a fire could break out.
8.2 ELECTRICAL WIRING BETWEEN DX-INTERFACE AND INDOOR AND OUTDOOR UNIT
• 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 300m 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.
13 PMML0293A rev.2 - 08/2016
• Wrap the accessory packing around the wires, and plug the wiring
connection hole with the sealing material to protect the product from
any condensed water and insects.
• Tightly secure the wires with the cord clamp inside the indoor unit.
• Lead the wires through the knockout hole in the side cover when
using conduit.
• Electrical wiring must comply with national and local codes.
• Check that the ground wire is securely connected.
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D A N G E R
• Do not connect or adjust any wiring or connections unless the main
power switch is OFF.
• Check that the earth wire is securely connected, tagged and locked in
accordance with national and local codes.
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N O T E
Please refer to Outdoor and connected device installation manual.
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C A U T I O N
All the field wiring and electrical components must comply with local
codes.
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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.