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6.2. Selecting circuit breaker and wiring
CAUTION
Be sure to install a breaker of the specified capacity.
Regulation of cables and breaker differs from each locality, refer in accordance with
local rules.
Breaker and wiring specifications
Breaker
capacity
[A]
Earth leak-
age breaker
[mA]
Power supply cable
Transmission cable
*
Conductor size
[mm²]
Conductor size
[mm²]
Max. length
[m]
30
30
6
2.5
50
Selected sample: Select the correct cable type and size according to the country or
•
region’s regulations.
Max. wire length: Set a length so that the voltage drop is less than 2%. Increase the
•
wire diameter when the wire length is long.
Select the appropriate breaker of the described specification according to the national
•
or regional standards.
Select the breaker that enough load current can pass through it.
•
Before starting work check that power is not being supplied to all poles of the indoor
•
unit and outdoor unit.
Install all electrical works in accordance to standard.
•
Install the disconnect device with a contact gap of at least 3mm in all poles nearby
•
the units. (Both indoor unit and outdoor unit)
Wiring size must comply with the applicable local and national code.
•
6.3. Knock out holes for wiring
CAUTION
Be careful not to deform or scratch the panel while opening the knock out holes.
When cables are routed from the unit, a protection sleeve for the conduits can be
inserted at the knock out hole.
If you do not use a wire conduit, be sure to protect the wires to prevent the edge of the
knock out hole from cutting the wires.
It is recommended to apply anti-rust paint to the edge of the knock out hole.
Knock out holes are provided for wiring. (Fig. A)
•
Knock out holes are provided 2 each in the same size in front, lateral and rear sides.
•
Fig. A
Installation method of One-touch bush
Please fix the One-touch bush (accessory) as shown below. (Fig. B)
Fig. B
(Pipe cover rear)
(Pipe cover front)
Front connection
Lateral connection
Rear connection
One-touch cable bush
(Accessories)
One-touch cable bush
(Accessories)
One-touch cable bush
(Accessories)
Note : Please ensure that the power cable and interconnecting cables are not installed
through the same cable bush hole opening. They must be installed into the two
separate hole openings to prevent damage to the cable.
6.4. Wiring method
6.4.1. Connection diagrams
Power supply
Outdoor unit
side terminal
Indoor unit
side terminal
Power line
EARTH
EARTH
6.4.2. Connection cable preparation
Keep the earth wire longer than the other wires.
•
Earth wire
30 mm
Power supply cable or
Transmission cable
35 mm
6.4.3. Wiring procedure
(1) Remove the service panel, the terminal cover and connect the wires to the terminal
in accordance with the terminal nameplate. (Fig. A, Fig. B)
Fig. A
Terminal cover
Direction of the service
panel removal
Terminal blocks
Service panel
(2) After connecting the wires, use cable clips to secure the wires. (Fig. B)
Connect the wires without applying excessive tension.
•
Fig. B
1
INDOOR UNIT
POWER
2 3 L N
G
G
1 2 3 L N
Terminal nameplate
Please remove the excess.
Power supply cable
Terminal blocks
Binder
(Accessory)
Binder
(Accessory)
Connection cable
(indoor unit and
outdoor unit
connection cable)
INDOOR UNIT
POWER
Binder
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