Download Installation Manual

 Specifications for communication wiring
Be sure to keep the rule of below tables about size and length of communication wiring.
Central
control
controller
◆ Design of communication wiring
Super modular multi system
U1 U2
U3 U4
Summary of communication wiring
Outdoor unit
Header unit
Header
unit
Outdoor unit
Follower unit
Header Follower
unit
unit
U3 U4
U3 U4
U3 U4
U3 U4
U3 U4
U3 U4
U1 U2 U5 U6
U1 U2 U5 U6
U1 U2 U5 U6
U1 U2 U5 U6
U1 U2 U5 U6
U1 U2 U5 U6
L5
Table-1
Table-2
U1 U2 U3 U4 U5 U6
L2
U1 U2
U3 U4
Indoor unit
Control wiring between outdoor units (Shield wire)
U1 U2
U1 U2
A B
Central control wiring (Shield wire)
U1 U2
A B
A B
L3
U1 U2
U1 U2
A B
U1 U2
A B
Table-3
U1 U2
A B
L7
Control wiring between indoor and outdoor units (Shield wire)
Remote controller
Control wiring between indoor units (Shield wire)
Flow selector unit
Flow selector unit
Flow selector unit
Flow selector unit
CN02
CN02
CN02
CN02
CN81
CN81
CN81
CN81
U1 U2 A B
Indoor unit
U1 U2 A B
Indoor unit
Table-1
Remote controller
U1 U2
A B
L6
Remote controller
U1 U2 A B
Indoor unit
U1 U2 A B
A B
Remote controller
Remote controller
(Group control)
2-core, non-polarity
Shield wire
Size / Length
1.25 mm2: Up to 1000 m / 2.0 mm2: Up to 2000 m (*1)
(*1): Total length of Communication wiring length for all refrigerant circuits (L1 + L2 + L3 + L4)
Indoor unit
A B
Communication wiring between indoor and outdoor units (L1, L2, L3), Central control wiring
(L4)
Type
Table-2
A B
A B
Remote controller
Wiring
Wiring
• Communication wiring and central control wiring use 2-core non-polarity wires.
Use 2-core shield wires to prevent noise trouble.
• Connecting the closed end terminal of shield wire.
(Connected to all connecting sections in each unit)
• Use 2-core non-polarity wire for remote controller. (A, B terminals)
Use 2-core non-polarity wire for wiring of group control. (A, B terminals)
• Control wire and power line wire between Flow selector unit and indoor unit are the accessory parts of Flow
selector unit. (Wire length : 6m)
If the length between indoor unit and Flow selector unit exceeds 5m, connect by using the Connection cable kit
sold separately (RBC-CBK15FE).
39-EN
Follower
unit
Header
unit
Follower
unit
U3 U4
L1
U1 U2 U3 U4 U5 U6
Follower
unit
U1 U2 U5 U6
Outdoor unit
Central remote
device (option)
Table-1
L4
2-core, non-polarity
Type
Shield wire
Size / Length
1.25 mm2 to 2.0 mm2 / Up to 100 m (L5)
Table-3
Wire
– 20 –
Communication wiring between outdoor units (L5)
Remote controller wiring (L6, L7)
2-core, non-polarity
Size
0.5 mm2 to 2.0 mm2
Length
• Up to 500 m (L6 + L7)
• Up 400 m in case of wireless remote controller in group control.
• Up to 200 m total length of communication wiring between indoor units (L6)
40-EN