27
4
Wiring design
4-5-2. Restriction of control wiring
Keep the rule of below tables about size and length of Control wiring.
Table-1
Control wiring between indoor and outdoor units (L1, L2, L3), Central control wiring (L4)
(*1): Total of control wiring length for all refrigerant circuits (L1 + L2 + L3 + L4)
Table-2
Control wiring between outdoor units (L5) (Other system)
Table-3
Remote controller wiring (L6, L7)
4-5-3. Group control through a remote controller
Group control of multiple indoor units (8 units) through a single remote controller
Wiring
2-core, non-polarity
Type
Shield wire
Size/Length
*1
1.25 mm
2
: Up to 1000 m
2.0 mm
2
: Up to 2000 m
Wiring
2-core, non-polarity
Type
Shield wire
Size/Length
1.25 mm
2
to 2.0 mm
2
Up to 100 m (L5)
Wire
2-core
Size
0.5 mm
2
to 2.0 mm
2
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
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
Header
unit
Follower
unit
Other system
Central
controller
Outdoor
unit
Indoor
unit
Table-1
Table-2
Table-1
Remote controller
Remote controller
Remote controller
U1 U2
A B
Table-3
This system
B
A
B
A
B
A
B
A
B
A
B
A
(A.B)
Remote controller
Indoor unit No.1
No.2
No.3
No.4
No.7
No.8
