En-14
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 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.
Unit : in (mm)
< Left view >
Ø 1-3/4 (43.7)
Ø 7/8 (22.2)
Ø 1-3/8 (34.5)
Ø 1-15/16 (50)
< Front view >
Ø 1-15/16 (50)
Ø 1-3/8 (34.5)
Ø 7/8 (22.2)
Ø 1-3/4 (43.7)
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 and specifi cation of the cable. 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.
• Select the power cable type and size in accordance with relevant local and national
regulations.
• Make sure the specifi cations for local wiring power cable and branch wiring are in
compliance with local code.
• Select the correct cable type and size according to the country or region’s regula-
tions.
• Use copper conductors only.
• Max. wire length: Set a length so that the voltage drop is less than 2%. Increase the
wire diameter when the wire length is longer.
(1) Selecting power supply cable and breaker when connecting single outdoor unit.
Refer to the table for the breaker specifi cations of each installation condition.
Model MCA MAX. CKT. BKR GFEB
AOUA72TLBV
41 A 50 A
100 mA
0.1 sec or less
AOUA96TLBV
AOUA120TLBV 50 A 60 A
MCA: Minimum Circuit Amp.
MAX. CKT. BKR: Maximum Circuit Breaker
• Select the appropriate breaker of the described specifi cation according to the
national or regional standards.
• Select the breaker that enough load current can pass through it.
Fig. In case of connected outdoor unit
GOOD
Breaker2
Breaker1
Transmission cable
Remote controller cable
Breaker1
Breaker2
208/230V 3Φ 60Hz
208/230V 1Φ 60Hz
Outdoor unit
power supply cable
RB unit
power supply
cable
Indoor unit
power supply
cable
208/230V 1Φ 60Hz
Breaker 1: Ground Fault Equipment Breaker (GFEB)
Breaker 2: Maximum Circuit Breaker (MAX. CKT. BKR)
(2) Selecting main breaker and main power supply cable when connecting multiple
outdoor units
Fig. In case of connected 3 outdoor unit
GOOD
Breaker2
Outdoor unit power supply cable
208/230V
3Φ 60Hz
Breaker1
Breaker 1:
Ground Fault Equipment
Breaker (GFEB)
Breaker 2:
Maximum Circuit Breaker
(MAX. CKT. BKR)
(3) Example of bad breaker wiring
PROHIBITED
208/230V
3Φ 60Hz
Outdoor unit
Power supply cable
PROHIBITED: crossover
power supply wiring prohibited
Breaker
PROHIBITED: install a
breaker for each outdoor unit
Breaker1
Breaker2
Breaker 1:
Ground Fault Equipment
Breaker (GFEB)
Breaker 2:
Maximum Circuit Breaker
(MAX. CKT. BKR)
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
9378945159-04_IM.indb 149378945159-04_IM.indb 14 2015/12/1 10:50:562015/12/1 10:50:56
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