En-13
6. 3. Knockout hole
CAUTION
Seal the wiring route hole with putty (fi eld supply) 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 hole, remove the burr on the edges to prevent snapping
of 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.
< Left view >
< Front view >
(Unit: mm)
Ø 50
Ø 34.5
Ø 43.7
Ø 22.2
Ø 50
Ø 34.5
Ø 43.7
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, specifi cation 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
accordance with local rules.
Refer to the table for the wiring and breaker specifi cations of each installation condition
.
(1) Selecting power supply cable and breaker when connecting 1 outdoor unit
Model
Breaker (Time delay fuse or circuit capacity)
Fuse capacity (A) Leakage current
AJ
072LALBH 20
100mA
0.1sec or less
AJ
090LALBH 25
AJ
108LALBH 25
AJ
126LALBH 40
AJ
144LALBH 40
AJ
162LALBH 40
Model
Outdoor unit power supply cable
Power supply
cable (mm
2
)
Ground wire (mm
2
)
Critical wiring
length (m)
AJ
072LALBH 6 6 62
AJ
090LALBH 6 6 62
AJ
108LALBH 6 6 62
AJ
126LALBH 10 10 64
AJ
144LALBH 10 10 64
AJ
162LALBH 10 10 64
1) These values are recommended data.
2) Specifi cation: Use conformed cord with Type 60245 IEC66
3) 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.
Fig. In case of connected outdoor unit
GOOD
Transmission cable
Remote controller cable
Breaker
400 V 3ø 50 Hz
Breaker
230 V 1ø 50 Hz
Outdoor unit
Power supply cable
Indoor unit
Power supply cable
(2) Selecting main breaker and main power supply cable when connecting multiple
outdoor units
Main breaker: Main breaker ≥ Total Sub breaker
(Refer to the table in item (1) for the
sub breaker capacity)
Fig. In case of connected 3 outdoor unit
GOOD
Sub
breaker
Outdoor unit power supply cable
400 V 3ø
50 Hz
Main
breaker
(3) Example of bad breaker wiring
PROHIBITED
400 V 3ø
50 Hz
Outdoor unit
Power supply cable
PROHIBITED: crossover
power supply wiring prohibited
Breaker
PROHIBITED: install a
breaker for each outdoor unit
6. 5. Transmission line
CAUTION
• Caution when wiring cable
When stripping off the coating of lead wire, always use the exclusive tool such as
a wire stripper. If there is no exclusive tool available necessarily, carefully strip the
coating by a cutter etc. so that the conductive wire is not damaged.
If it is damaged, it may lead to an open circuit and a communication error.
• Pay attention to the following points while attaching wires on the terminal board.
Do not attach 2 wires on one side.
Do not twist wires.
Do not cross the wires.
Do not shorted at edge at root.
PROHIBITED
GOOD
PROHIBITED
PROHIBITED PROHIBITED
GOOD
2pcs at one side
Shorted at edge
Wires twisted
Shorted at root
1 wire
2 wires
6. 5. 1. Transmission wiring specifi cations
Follow the specifi cations below for the transmission cable.
Use Size Wire type Remarks
Transmission
cable
0.33mm
2
22AWG LEVEL 4 (NEMA)
non-polar 2core, twisted pair
solid core diameter 0.65mm
LONWORKS
®
com-
patible cable
9378945180-02_IM.indb 139378945180-02_IM.indb 13 2014/11/10 19:39:572014/11/10 19:39:57
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