– 15 –
Design of control wiring
1. All control wiring is 2-core and non-polarity wire.
2. Ensure use of shielded wiring in the following cases to prevent noise issues.
• Indoor-indoor / outdoor-indoor control wiring, Central control wiring.
NOTE
*1: Total of control wiring length for all refrigerant circuits ( L1 + L2 + L3 + L4 )
Table 3 Remote controller wiring (L6, L7)
▼
Group Control through a Remote Controller
Group control of multiple indoor units (8 units) through a single remote controller
Table 1 Control wiring between indoor and
outdoor units (L1, L2, L3),
Central control wiring (L4)
Table 2 Control wiring between outdoor
units (L5) (SMMS series)
Wire
2-core
Size
0.5 mm² to 2.0 mm²
Length
• Up to 500 m ( L6 + L7 )
• Up to 400 m with of wireless remote controller in group control.
• Up to 200 m total length of control wiring between indoor units ( L6 )
U3 U4
U1 U2
U1
U3
U2
U4
U1 U2
A B
U3 U4
U1 U2
U1 U2
A B
U1 U2
A B
U1 U2
A B
U1 U2
A B
U1 U2
A B
MINI-SMMS
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
L6
L7
L7
L4
3
L
2
L
Central control
device
SMMS
(Super modular multi system)
[Outdoor unit]
[Indoor unit]
Remote controller
Remote controller
Remote controller
Header
unit
Follower
unit
Table-3
Table-1
Table-2
Table-1
Wiring
2-core, non-polarity
Type
Shield wire
Size
Length *1
1.25 mm² : Up to 1000 m
2.0 mm² : Up to 2000 m
Wiring
2-core, non-polarity
Type
Shield wire
Size
Length
1.25 mm² to 2.0 mm²
Up to 100 m (L5)
A B
A B
A B
A B
A B
A B
(A, B)
Indoor unit No.1
Remote
controller
No.2
No.3
No.4
No.7
No.8
• Connect each wire for controlling as shown below.
• Wire specification, quantity, size of crossover wiring and remote controller wiring
1. The crossover wiring and central control wiring use 2-core non-polarity transmission wires. Use 2-core shield
wires to prevent noise trouble. In this case, close (connect) the end of shield wires, and perform the functional
grounding for the end of the shield wires which are connected to both indoor and outdoor units.
For the shield wires which are connected between the central remote controller and the outdoor unit, perform
the functional grounding at only one end of central control wiring.
2. Use 2-core and non-polarity wire for remote controller. (A, B terminals)
Use 2-core and non-polarity wire for wiring of group control. (A, B terminals)
Name
Q’ty
Size
Specification
Up to 500 m
Up to 1000 m 1000 to 2000 m
Control wiring
(indoor-indoor / indoor-outdoor / outdoor-indoor
control wiring, central control wiring)
2 cores
1.25 mm²
2.0 mm²
Shield wire
Remote controller wiring
2 cores
0.5 to 2.0 mm²
—
—
—
U2
U1
U3
U4
CN82
U1
U3
U2
U4
U3 U4
U2
U1
U2
U1
U2
U1
U2
U1
U2
U1
(Open)
PMV Kit
(Option)
[Outdoor unit]
[Indoor unit]
Central remote controller (Option)
Shield earth screw
(Open)
To other
refrigerant
system
Relay
connector
For control
wiring between
indoor and
outdoor
Control wiring between indoor
and outdoor units
Cable clamp
Relay connector
(Factory default : No connection)
Control wiring between indoor and outdoor units
Control wiring between indoor units
Connection of shield wire must be connected
(Connected to all connecting sections in each Indoor unit)
Indoor control
P.C. board
For wiring of
central control
system
29-EN
30-EN
