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8. ELECTRIC WIRING WORK
• Electric wiring work must be conducted by electrician authorized by power companies. (Only licensed elec-
trician can conduct electric work and earth connections.)
• All wiring must be performed by an authorized electrician.
• A circuit breaker capable of shutting down power supply to the entire system must be installed.
• Be sure to install an earth leakage circuit breaker to the outdoor unit.
(This installation of an earth leakage circuit breaker is mandatory for the prevention of electric shocks and
fire disasters.)
• Make sure that 220-240V is specified wiring between the indoor and outdoor units and between indoor
units.
• Do not turn on the power supply (of the indoor unit) until all the installation work is completed.
• Be sure to ground the air conditioner.
• Refer to the installation manual attached to the outdoor unit for the size of power supply electric wire con-
nected to the outdoor unit, the capacity of the circuit breaker and switch, and wiring instructions.
• Do not connect the earth wire to gas pipes, plumbing pipes, lightning rods, or telephone earth wires.
• Gas pipes: might cause explosions or fire if gas leaks.
• Plumbing: no earth effect if hard vinyl piping is used.
• Telephone earth wires or lightning rods: might cause abnormally high electric potential in the earth dur-
ing lighting storms.
• For electric wiring work, refer to also "WIRING DIAGRAM" attached to the unit body.
• Never connect the power supply wire to the terminal block for remote controller wire, or otherwise the entire
system may be damaged.
• For remote controller wiring details, refer to the installation manual attached to the remote controller.
• Do not touch the printed circuit board ASSY during the wiring work. Otherwise, it may cause damage.
• Specifications for field wire
Refer to the installation manual attached to the outdoor unit regarding the detail of standard accessories for
the outdoor unit.
The remote control cord should be procured locally. Refer to the Table 4 when preparing one.
Wiring specifications are shown on the condition that the wiring has a voltage drop of 2%.
Table 4
Wiring the units
Remote controller cord
*This will be the total extended length in the system when doing group control.
NOTE
1. Shows only in case of protected pipes. Use H07RN-F in case of no protection.
2. Vinyl cord with sheath or cable (Insulated thickness : 1mm or more)
Connection of wiring between units, earth wire and for the remote controller cord (Refer to Fig. 28)
• Wiring the units and earth wire
Remove the control box lid and connect wires of matching number to
the terminal block for wiring the units (4 P) inside. And connect the
earth wire to the earth terminal. In doing this, pull the wires inside
through the hole and fix the wires securely with the included clamp
(4).
• Remote controller cords
Remove the control box lid and pull the wires inside through the hole
and connect to the terminal block for remote controller. (no polarity)
Securely fix the remote controller cord with the included clamp (4).
18
Wire
H05VV – U4G (NOTE 1)
Vinyl cord with sheath or cable NOTE 2 (2 wire)
2
Size (mm
)
2.5
0.75 – 1.25
Max. 500 m *
Outdoor unit
Indoor unit
(Terminal block)
(Terminal block)
Match both numbers.
How to connect the connection pipe
Length
–
English
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