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Specifications for communication wiring
◆
Design of communication wiring
Summary of communication 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).
U1 U2 U3 U4 U5 U6
U1 U2 U3 U4 U5 U6
U1 U2
U3 U4
U1 U2 A B
U1 U2 A B
U1 U2 A B
U1 U2 A B
A B
A B
A B
CN02
CN81
CN02
CN81
CN02
CN81
CN02
CN81
Central remote
device (option)
Outdoor unit
Header unit
Outdoor unit
Follower unit
Control wiring between outdoor units (Shield wire)
Central control wiring (Shield wire)
Control wiring between indoor and outdoor units (Shield wire)
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Remote controller
Remote controller
Remote controller
(Group control)
Control wiring between indoor units (Shield wire)
Flow selector unit
Flow selector unit
Flow selector unit
Flow selector unit
Be sure to keep the rule of below tables about size and length of communication wiring.
(*1): Total length of Communication wiring length for all refrigerant circuits (L1 + L2 + L3 + L4)
Table-1
Communication wiring between indoor and outdoor units (L1, L2, L3), Central control wiring
(L4)
Wiring
2-core, non-polarity
Type
Shield wire
Size / Length
1.25 mm
2
: Up to 1000 m / 2.0 mm
2
: Up to 2000 m (*1)
Table-2
Communication wiring between outdoor units (L5)
Wiring
2-core, non-polarity
Type
Shield wire
Size / Length
1.25 mm
2
to 2.0 mm
2
/ Up to 100 m (L5)
Table-3
Remote controller wiring (L6, L7)
Wire
2-core, non-polarity
Size
0.5 mm
2
to 2.0 mm
2
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)
U3 U4
U1 U2
U1
U3
U2
U4
U5 U6
U1 U2
A B
U3 U4
U1 U2 U5 U6
U1 U2
A B
U1 U2
A B
U1 U2
A B
U1 U2
A B
U3 U4
U1 U2 U5 U6
U3 U4
U1 U2 U5 U6
U3 U4
U1 U2 U5 U6
U3 U4
U1 U2 U5 U6
U1 U2
A B
U1 U2
A B
U1 U2
A B
U3 U4
U1 U2 U5 U6
L1
L5
L6
L7
L4
L2
L3
Header
unit
Header
unit
Follower
unit
Follower
unit
Follower
unit
Header
unit
Follower
unit
Super modular multi system
Central
control
controller
Outdoor unit
Indoor unit
Table-1
Table-2
Table-1
Remote controller
Remote controller
Remote controller
Table-3
39-EN
40-EN
Summary of Contents for MMY-MAP0804FT8-E
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