Electrical Wiring; General Check; Electrical Wiring Connection; Cable Specifications - Hitachi air Core 600 Installation & Maintenance Manual

7. Electrical Wiring

● Turn OFF the main power supply to the indoor and outdoor unit before electrical wiring work
or a periodical check is performed.
● Check to ensure that the indoor fan and the outdoor fan have stopped before electrical wiring work or
a periodical maintenance is performed.
● Protect the wires, drain pipe, electrical parts , etc. from rodents or other small animals. If left unprotected,
rodents may damage the wiring, causing injury or fie.
● Check the item below before turning ON the disconnect.
● Tighten screws according to the following torque.
M3.5: 1.2N·m
M5: 2.0～2.4N·m
● Wrap the accessory packing around the wires, and seal the wiring connection opening with the seal material
to protect the product from any condensate water or insects.
● Tightly secure the wires with the cord clamp inside the indoor unit.
● Secure the cable of the wired controller using the cord clamp inside the electrical box.

7.1 General Check

(1) Make sure that the field-selected electrical components(main power switches, circuit breakers, wires,
conduit connectors and wire terminals) have been properly selected according to the electrical data given
in "Cable Specifications".
(2) Check to ensure that the power supply voltage is within ±10% of the rated voltage.
(3) Check the capacity of the electrical wires. If the power source capacity is too low, the system cannot be
started due to the voltage drop.
(4) Check to ensure that the ground wire is connected.
(5) Power Source Main Switch Install a multi-pole main switch with a space of 3.5mm or more between each
phase.

7.2 Electrical Wiring Connection

The intermediate connection between the indoor unit and the air panel should be referred to in the Installation
Manual for Air Panel.
(1) Connect the power supply and ground wires to the terminals in the electrical box.
(2) Connect the wires between the indoor unit and the outdoor unit to the terminals in the electrical box.

7.3 Cable Specifications

Model
Power Supply
Capacity
18K 220-240V ~, 50Hz
25K/30K 220-240V ~, 50Hz
36K 220-240V ~, 50Hz
42K/48K/55K 380-415V 3N ~, 50Hz
Max. Running Current(A): REFER TO NAMEPLATE
ELB
Nominal Nominal Sensitive
Current Current
(A) (mA)
20 30
25 30
32 30
25 30
35
Installation and Maintenance
Power Source Transmitting
Cable Size Cable Size
IEC60335-1*1 IEC60335-1*1
2
3×2.5mm 4×1.5mm
2
3×2.5mm 4×1.5mm
2
3×2.5mm 4×1.5mm
2
5×2.5mm 4×1.5mm
Circuit
Breaker
(A)
2
20
2
25
2
32
2
25