Toshiba MMU-AP0072H2UL Engineering Data Book page 35

4
Wiring Design
Restriction of control wiring
Be sure to keep the rule of below tables about size and length of control wiring.
Central
control
U1 U2
U3 U4
Header
unit
U3 U4
Outdoor unit
U1 U2 U5 U6
L1
U1 U2
Indoor unit
A B
Remote control
Table-1 Control wiring between indoor and outdoor units (L1, L2, L3), Central control wiring (L4)
Wiring
Type
Size/Length
(*1): Total length of control wiring length for all refrigerant circuits (L1 + L2 + L3 + L4)
Table-2 Control wiring between outdoor units (L5)
Wiring
Type
Size/Length
Table-3 Remote control wiring (L6, L7)
Wire
Size
Length
Header
Follower
unit
unit
U3 U4 U3 U4
U1 U2 U5 U6 U1 U2 U5 U6
L5
L 2
U1 U2 U1 U2
A B A B
Table-3
Remote control
2-core
Shielded cable
AWG16: Up to 3280 ft (1000 m) AWG14: Up to 6560 ft (2000 m) (*1)
2-core
Shielded wire
AWG16 to AWG14/Up to 330 ft (100 m) (L5)
2-core
AWG20 to AWG14
• Up to 1640 ft (500 m) (L6 + L7)
• Up 1310 ft (400 m) in case of wireless remote control in group control.
• Up to 660 ft (200 m) total length of control wiring between indoor units (L6)
Table-1
L4
U1 U2 U1 U2
A B A B
34
Header Follower
unit unit
U3 U4
U1 U2 U5 U6 U1 U2 U5 U6
Table-1
Table-2
L 3
U1 U2 U1 U2
A B A B
L7
L6
Remote control
U3 U4
U1 U2
A B