Design Of Control Wiring - Toshiba MiNi-SMMS Installation Manual

4
ELECTRIC WIRING

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.
Central control
device
U1 U2
U3 U4
U3 U4
Outdoor unit
U1 U2
L1
U1 U2
Indoor unit
A B
Remote controller
Table-1 Control wiring between indoor and
outdoor units (L1, L2, L3),
Central control wiring (L4)
Wiring 2-core, non-polarity
Type Shield wire
Size 1.25 mm² : Up to 1000 m
Length ∗ ∗ ∗ ∗ ∗ 1
2.0 mm² : Up to 2000 m
Note ∗1 : Total of control wiring length for all refrigerant circuits ( L1 + L2 + L3 + L4 )
Table-3 Remote controller wiring (L6, L7)
Wire 2-core
Size 0.5 mm² to 2.0 mm²
• Up to 500 m ( L6 + L7 )
Length • Up to 400m with of wireless remote controller in group control.
• Up to 200m total length of control wiring between indoor units ( L6 )
• Group Control through a Remote Controller
Group control of multiple indoor units (8 units) through a single remote controller
Indoor unit No.1
A B
(A, B)
Remote
controller
Mini-SMMS
U3 U4
U1 U2
L2
U1 U2 U1 U2
A B A B
Table-3
Remote controller
No.2 No.3
A B A B
Table-1
L4
U1 U2 U1 U2 U1 U2
A B A B
L7
L6
Table-2 Control wiring between outdoor
units (L5) (S-MMS)
Wiring
Type
Size
Length
No.4
A B
23
S-MMS
(Super modular multi system)
Header
unit
U3 U4
U1 U2 U5 U6
Table-1
L3
U1 U2 U1 U2
A B A B
L7
Remote controller
2-core, non-polarity
Shield wire
1.25 mm² to 2.0 mm²
Up to 100 m (L5)
No.7 No.8
A B A B
Follower
unit
U3 U4
U1 U2 U5 U6
Table-2
L5
U1 U2
A B A B
L6