En-12
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(Unit: mm)(Unit: mm)
Length of the grommet edging Mounting the grommet edging
Grommet edging
(accessories)
Knockout hole
Knockout hole
diameter (mm)
Dimension L
(mm)
Ø 50 147
Ø 43.7 130
Ø 34.5 100
Ø 22.2 60
Ø 50
Ø 50
Ø 34.5
Ø 34.5
Ø 43.7
Ø 43.7
Ø 22.2
Ø 22.2
6.4. Selecting power supply cable and breaker
CAUTION
Obtain the distribution network operator's agreement about the power capacity of the
power supply system, specification of the cable and the harmonic current, and etc.
when you connect the outdoor unit with the power supply.
Regulation of wire size and circuit breaker differs from each locality, please refer in ac-
cordance with local rules.
Refer to the table for the wiring and breaker specifications of each installation condition.
(1) Selecting power supply cable and breaker when connecting 1 outdoor unit
Model
Breaker (Time delay fuse
or circuit capacity)
Outdoor unit power supply cable
Recommended cable size
(mm²)
Limited wir-
ing length
(m)
Fuse capac-
ity (A)
Leakage
current
Power cable
Earth
(ground)
cable
AJ*072LALDH
20
100 mA
0.1 sec or
less
6662
AJ*090LALDH
25 6 6 62
AJ*108LALDH
25 6 6 62
AJ*126LALDH
40 10 10 64
AJ*144LALDH
40 10 10 64
These values are recommended data.
• Specification: Use conformed cord with Type 60245 IEC66
• 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.
In case of connected outdoor unit
3N~ 400V 50Hz
230V ~ 50Hz
GOOD
Transmission cable
Remote controller cable
Breaker
Breaker
Outdoor unit
Power supply cable
Indoor unit
Power supply cable
(2) Selecting main breaker and main power supply cable when connecting multiple
outdoor units
In case of connected 3 outdoor unit
3N~ 400V
50Hz
GOOD
Sub
breaker
Outdoor unit power supply cable
Main
breaker
Main breaker: Main breaker ≥ Total Sub breaker
(Refer to the table in item (1) for the sub breaker
capacity)
3N~ 400V
50Hz
PROHIBITED
Outdoor unit power supply cable
PROHIBITED: crossover power
supply wiring prohibited
Breaker
PROHIBITED: install a breaker for
each outdoor unit
6.2. Wiring method
6.2.1 Connection diagrams
The wiring example for outdoor units and indoor units is shown in the figure.
*1
*2*2*2
*1*1
Power supply
3N~ 400V 50Hz
230V ~ 50Hz
3N~ 400V 50Hz
230V ~ 50Hz
3N~ 400V 50Hz
230V ~ 50Hz
Outdoor unit 1
(Primary)
Power supplyPower supplyPower supply
Indoor unitIndoor unitIndoor unit
TransmissionTransmission
Transmission
Transmission Transmission Transmission
Outdoor unit 2
(Subordinate 1)
Outdoor unit 3
(Subordinate 2)
Breaker
Breaker Breaker
Power supply Power supply
Power supply Power supply Power supply
Remote control
Remote control
Remote control
Power supplyPower supplyPower supply
Remote
controller
(2-wire)
Remote
controller
(2-wire)
Remote
controller
(3-wire)
To other refrigerant
circuit outdoor unit
Breaker Breaker Breaker
*1: The number of power supply terminals is different depending on the indoor unit
model. For the wiring, refer to the indoor unit installation manual.
*2: Earth (Ground) the remote controller if it has an earth (ground) cable.
• There are two types of remote controller: the 2-wire type and the 3-wire type. For details,
see the relevant remote controller installation manual. (When connecting the 2-wire type
remote controller, Y3 is not used.)
6.3. Knockout hole
CAUTION
Seal the wiring route hole with putty (Locally purchased) such that there are no gaps.
Small insects or animals that are trapped in the outdoor unit may cause a short circuit in the
electrical component box.
Be careful not to deform or scratch the panel while opening the knockout holes.
After opening the knockout holes, remove burr on the edges, and attach the conduit or
grommet edging (accessories) to prevent damaging the cables.
It is recommended to apply rust proof paint on the edges to prevent rust.
Electric wires can be connected from the front or from the left.
(Knockout holes are prepared so that wiring can be made from 2 different directions.)
Use the knockout holes on the front and the left separately when necessary.
9378945708-02_IM_L9.indb 129378945708-02_IM_L9.indb 12 2022/1/20 15:34:372022/1/20 15:34:37
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