Electrical Wiring; General Information - Hitachi AirCore 700 Operation Installation Maintenance Manual

6. Electrical Wiring

6. Electrical Wiring

6.1 General Information

DANGER
!
•
Turn OFF the main power switch to the indoor unit and the outdoor unit and wait for more than 10
minutes 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 check is performed.
•
Protect the wires, drain pipe, electrical parts, etc. from rats or other small animals. If not protected,
rats may gnaw at unprotected parts and at the worst, a fire will occur.
•
The ground wire must be longer than the current-carrying conductor when installing the power cord.
•
Using the air conditioner power terminal to transfer the power cord is strictly prohibited. A power
distribution box can be used to expand the power distribution on the indoor unit.
•
A switch that can ensure all-pole disconnection should be installed between the power supply and air
conditioning unit, and the contact spacing of this switch should be no less than 3mm.
CAUTION
!
•
Use the ELB(Electric Leakage Breaker) which is above medium reaction speed (residual-current circuit
breaker, action time of 0.1s or less). Otherwise, it may lead to electric shock or fire.
•
Use twisted shielded pair cable or shield pair cable for transmission cables between the indoor and
the outdoor units, and connect the shielded part to the earth screw in the electrical box of the indoor
unit as shown below.
•
Wrap the field-supplied insulation around the wires, and plug the wiring connection hole 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.
•
Lead the wires through the knockout hole in the side cover when using conduit.
•
Secure the cable of the remote control switch using the cord clamp inside the electrical box.
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. Make sure that the components
follow local codes and regulations.
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. Select the wire sizes according to the European Standard IEC 60335-1. Use the wires which are not
lighter than the ordinary tough rubber sheathed flexible cord (code designation H05RR-F) or ordinary
polychloroprene sheathed flexible cord (code designation H05RN-F) when get power from outside.
Model
PCI-2.0UFA1NQ
PCI-2.5UFA1NQ
PCI-3.0UFA1NQ
PCI-4.0UFA1NQ
PCI-5.0UFA1NQ
PCI-6.0UFA1NQ
PCI-6.5UFA1NQ
Current(A)
i<6
6<i≤10
10<i≤16
16≤i≤25
In the case that current exceeds 63A, do not connect cables in series.
*1
5. Check to ensure that the ground wire is connected.
Field Minimum Wire Sizes for Power Source
Maximum Current
Power Source
(A)
0.39
0.39
0.48
220-240V
0.83
~50Hz
1.03
1.03
1.18
2
Wire Size (mm
2.5
2.5
2.5
4
Power Cord Size
IEC 60335-1
2.5mm
) Current(A)
25<i≤32
32<i≤40
40<i≤63
63<i
-17-
Transmitting Cable Size
IEC 60335-1
2
0.75mm
Wire Size (mm
6
10
16
*1
2
2
)