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6.3. Selecting power supply cable and breaker
Regulation of cable size and circuit breaker differs from each locality, please refer in
accordance with local rules.
Refer to the table for the wiring and breaker specifications of each installation condition.
Breaker (Time delay fuse
or circuit capacity)
MODEL
Fuse capac-
Leakage
ity (A)
current
AJ*040LCLDH
32
30mA
AJ*045LCLDH
32
0.1sec or
less
AJ*054LCLDH
32
• These values are recommended data.
• Specification: Use conformed cord with Type 60245 IEC66
• Max. cable length: Set a length so that the voltage drop is less than 2%. Increase the
cable diameter when the cable length is long.
In case of connected outdoor unit
Transmission cable
230 V 1ø 50 Hz
Breaker
Outdoor unit
Power supply cable
6.4. Transmission line
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 coat-
ing 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.
GOOD
1 wire
2 pcs at one side
2 wires
Shorted at edge
6.4.1 Transmission wiring specifi cations
Follow the specifications below for the transmission cable.
Use
Size
22AWG LEVEL 4 (NEMA)
Transmission cable
0.33 mm²
non-polar 2 core, twisted pair
solid core diameter 0.65 mm
Twisted pair with shielded type.
Use the shielded wire specified and always ground it both ends.
CAUTION
Outdoor unit power supply cable
Recommended cable size
2
(mm
)
Limited wir-
ing length
Earth
Power cable
(ground)
cable
6
4
6
4
6
4
230 V 1ø 50 Hz
Indoor unit
Power supply
cable
Breaker
CAUTION
PROHIBITED
Wires twisted
Shorted at root
Cable type
Remarks
LONWORKS ®
compatible cable
6.4.2 Wiring rules
(1) Total length of transmission cable
Total transmission line length: MAX 3,600 m
EF + EG + GH + HJ + HK + KL < 3,600 m (Fig. 2)
In the following cases, Signal Amplifier is required.
1)
When the total length of the transmission line exceeded 500 m.
AB + BC + BD > 500 m (Fig. 1)
2)
When the total number of units* is over 64.
3)
Transmission line length between each unit* ≥ 400 m
(2) Length of transmission cable between 1 network segment (NS)
EF + EG + GH + HJ + HK ≤ 500 m (Fig. 2)
KL ≤ 400 m (Fig. 2)
Unit* means indoor unit, outdoor unit, Touch panel controller and System controller, Signal
(m)
amplifier, Single split adaptor, Network convertor etc.
Fig. 1
18
Terminal resistor
18
18
Outdoor unit
Indoor unit
When AB + BC + BD > 500 m
: Signal amplifier is required.
Fig. 2
Outdoor unit
Terminal resistor
Transmission line
Signal amplifier
Terminal resistor
6.4.3 Enabling/Disabling automatic address setting
You can enable/disable automatic address setting for the indoor unit and the signal ampli-
fier.
To enable automatic address setting for the indoor unit, connect the indoor unit to outdoor
units under the same refrigerant system.
Example: Disable Automatic Address setting
Refrigerant
system 1
Refrigerant
system 2
Refrigerant
system 3
Example: Enable Automatic Address setting
Refrigerant
system 1
Refrigerant
system 2
Refrigerant
system 3
Transmission line
Touch panel
controller
NOTES:
NS 1
Do not use loop wiring. This
Indoor unit
may lead to parts damage and
erroneous operation.
Touch
panel
controller
NS 2
System
controller
Transmission line
Transmission line
Transmission line
Transmission line
Transmission line
Transmission line
System
controller
En-8
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