6 720 862 437 (2016/10)
RDCI Series – All DC Inverter Outdoor Units
20 | ELECTRIC WIRING
8.6 Electric wiring of indoor/outdoor units
CAUTION
■ Install a separate power supply for indoor unit and outdoor unit.
■ An all-pole disconnection device which has at least 3 mm separation
distance in all poles and a residual current device (RCD) shall be
incorporated into the fixed wiring in accordance with national wiring
regulations.
■ All indoor units must be connected to the same electrical power
supply incorporating a leak protector and must be able to be isolated
off one switch. Each indoor unit must also have an electrical
isolation as per the national wiring regulations.
■ 3 Core shielded cable must be used for communication wires.
8-6-1 Outdoor unit power wiring
■ With power facilities
■ Indoor power supply
CAUTION
■ Ensure the correct communication wires are with the correct
system.
■ Electrical power supply and communication cables must be installed
in separate containment. (Current capacity of power supply: less
than 10A--300mm, less than 50A--500mm.)
■ When connecting multiple outdoor units, ensure the address
settings have been done prior to powering on.
8.7 Signal wire of indoor/outdoor units
■ Communication wiring must be 3 core shielded cables and must be
> 0.75mm in size. Communication cables are polarity sensitive.
8.8 Example for power wire connection
Fig. 8-4
Leakage
protector
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Branch box
GND
GND
GND
GND
Leakage
protector
Outdoor unit
power supply
380-415V 3N~ 50Hz
Manual
switch
Manual
switch
Fig. 8-5
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
Branch box
GND
GND
GND
GND
GND
GND
Leakage
protector
Power facilities 1
(with leakage protector)
Power facilities 12
(with leakage protector)
Manual
switch
1
9
2
10
3
11
4
12
5
13
6
14
7
15
8
16
Fig. 8-6
Indoor power
Leakage protector
Manual switch Branch box Indoor unit
(P Q E)
P
Q
P
Q
P
Q
P
Q
P
Q
(P Q E)
(H1 H2 E) (H1 H2 E) (H1 H2 E)
(H1 H2 E)
Fig. 8-7
Outdoor unit
(master unit)
Outdoor unit
(slave unit)
Outdoor unit
(slave unit)
Outdoor unit
(slave unit)
Signal wire between outdoor units
SBOX
(open)
(open)
(open)
(open)
resistor
resistor
resistorresistor
resistor
(open)
group control
The indoor unit where the communication wire ends (last leg), should have a
resister (suppled) fitted between port P and port Q
Signal wire for indoor/
outdoor units
SBOX SBOX SBOX
Shielded layers must terminate to
ground.
L2 L3 NL1 P Q EEH2H1
L N EQP
L2 L3 NL1 P Q EEH2H1 L2 L3 NL1 P Q EEH2H1
C D EBA L N E C D EBA L N E C D EBAQP QP
L2 L3 NL1
C D EBA C D EBA C D EBA
L N EQP
EQP
L2
L3
N
L1
Outdoor unit (master unit)
Indoor unit
Signal wire between indoor/outdoor units
Branch Box Branch Box Branch Box Branch Box
Wire controller Wire controller Wire controller
Signal wire between outdoor units
Signal wire between indoor unit and wire controller
Power wire between indoor units
Indoor unit Indoor unit
Outdoor unit (slave unit) Outdoor unit (slave unit)
Power(380-415V 3N~ 50Hz)
SBOX
Fig. 8-8
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