Wiring Between Indoor And Outdoor Units - Toshiba MMD-AP0074BH2UL Installation Manual

Power supply wire
Recommended wire diameter and wire length for power supply wire.
Power supply wiring
▼ Electric characteristics
Model Power Supply
MMD-AP0074BH2UL
MMD-AP0094BH2UL
MMD-AP0124BH2UL
MMD-AP0154BH2UL
MMD-AP0184BH2UL
MMD-AP0214BH2UL 208 / 230 V-1-60 Hz
MMD-AP0244BH2UL
MMD-AP0304BH2UL
MMD-AP0364BH2UL
MMD-AP0424BH2UL
MMD-AP0484BH2UL
Control wire
Control wiring between indoor units, and outdoor unit (2-core
shielded wire)
Remote control wiring
2-core with non-polarity wire is used for wiring of the remote control wiring and group remote controls wiring.
Remote control wiring, remote control inter-unit wiring
Total wire length of remote control wiring and remote control
inter-unit wiring = L + L1 + L2 + ... Ln
Total wire length of remote control inter-unit wiring = L1 + L2 + ... Ln
Indoor unit Indoor unit
Remote
L
control
L1
wiring
Remote
Remote control inter-unit wiring
control
NOTE
• Use copper supply wire.
• Use UL wire rated 600 V for the power supply.
• Use UL wire rated 300 V for the remote control wires and control wires.
21-EN
Wire size: 2  AWG12
Up to 164'1" (50 m)
Ground 1  AWG12 or thicker
MCA : Minimum Circuit Amps
MOCP : Maximum Overcurrent Protection (Amps)
Voltage Range (V) MCA
Min Max (A)
1.0
1.0
1.0
1.2
1.2
187 253 1.8
1.8
1.8
2.3
2.8
2.8
(Up to 3280'10" (1000 m)) AWG16
Wire size
(Up to 6561'8" (2000 m)) AWG14
Wire size: AWG20
In case of wired type only Up to 1640'5" (500 m)
In case of wireless type included Up to 1312'4" (400 m)
Up to 656'2" (200 m)
Indoor unit Indoor unit
L2 Ln
(Max. 8 units)
– 11 –
CAUTION
The remote control wire (Communication line) and AC208 / 230 V wires cannot be parallel to contact each other and
cannot be stored in the same conduits. If doing so, a trouble may be caused on the control system due to noise or other
factor.
 Wiring between indoor and outdoor units
MOCP
(A)
NOTE
15
An outdoor unit connected with control wiring between indoor and outdoor units wire becomes automatically the header
15
unit.
15
15
▼ Wiring example
15
15
15
Outdoor Power supply
15
15
Circuit breaker
15
15
Header outdoor unit
Ground
L1 L2 L3 N
terminal
Indoor unit
Ground
L1L2
Disconnect
switch per NEC
Indoor
power
supply
Circuit
208 /
230-1-60 breaker
Outdoor Power supply
Circuit breaker
Follower outdoor unit
Ground
U1U2U3U4 U5U6 L1 L2 L3 N U1U2U3U4 U5U6
terminal
Control wiring between outdoor units
Control wiring between indoor and outdoor units
Control wiring between indoor units
Indoor unit Indoor unit
Ground Ground
U1U2 A B L1L2 U1U2 A B L1L2 U1U2
Disconnect
Disconnect
A B A B
switch per switch per
NEC NEC
Remote Remote
control control
Indoor unit
Ground
A B L1L2 U1U2 A B
Disconnect
A B
switch per
NEC
Remote
control
Group control
22-EN