Electrical Wiring; Wiring Procedures; Wiring Work - Hitachi airCore 700 Installation & Maintenance Manual

6. Electrical Wiring

6.1 Wiring Procedures

(1) Read and understand well "1. Safety Summary" in this manual prior to commencing wiring
connections.
(2) The electrical wiring work must be performed by licensed electricians. If not, it may cause an electric
shock or a fire.
(3) Install a high-sensitive high speed ELB (Earth Leakage Breaker) when the rated sensitive current is
less than 30mA (The motion time should be within 0.1 second) in the power supply. If it is not used,
it will cause an electric shock or a fire.
(4) Ensure that the power supply is switched off prior to opening the Zone Interface Box cover.
(5) Take care, and do not pinch electrical wires when assembling the Zone Interface Box cover. It may
cause an electrical shock or fire.
(6) Make sure the field-selected electrical components (breaker, cables and wire terminals) have been
properly selected. Make sure that the components comply with NEC (National Electrical Code).
(7) Check to ensure that all earth wires are properly grounded.
(8) Check to ensure that the power supply voltage is within ±10% of the rated voltage.
(9) Check to ensure that each zone damper motor input power is not more than 4VA.
(10) If the power supply cable is damaged in any way, it must be replaced by a licensed electrician prior
to turning the power on.

6.2 Wiring Work

6.2.1 Field Cable Sizes
Model Power Supply
AC 230V±10%/
GC-AZKP
50Hz/1Ph
NOTES:
•
The Zone Interface Box shall use the same power supply as the indoor unit.
•
Please follow the local codes and regulations when selecting field wires. Use the conductor
identified by the color combination yellow/green for the ground wire.
•
The selected power cables shall not be lighter than the neoprene sheathed cable No. 57 specified
by IEC60245-1. The power cables should be copper cables.
•
Use a shielded cable for the communication circuit and properly ground the shield layer.
•
When using an Insulated Ring Terminal, M4 crimping terminal should be used. When a ring
terminal is not used, curve the wire into the shape as shown in the figure below and connect it to
tighten the washer uniformly. The screws at the terminal block should be handled according to
the tightening torque as shown in the table "Tightening Torque for Terminals".
Maximum
Running ELB
Current
As per indoor
0.25A installation
requirement
15
INSTALLATION & MAINTENANCE MANUAL
Power Cable
Communication Wire for
Specification
Wired Remote Controller
(L,N, )
2
0.75mm
and Thermostat
2
0.75mm