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Power supply wire
Recommended wire diameter and wire length for power supply wire.
Power supply wiring
▼ Electric characteristics
Model
Power Supply
MML-AP0074BH2UL
MML-AP0094BH2UL
MML-AP0124BH2UL
208 / 230 V-1-60 Hz
MML-AP0154BH2UL
MML-AP0184BH2UL
MML-AP0244BH2UL
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.
15-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)
0.4
0.4
0.4
187
253
0.7
0.7
0.7
(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)
CAUTION
Do not put the remote control wires and power supply wires (AC208 / 230 V) in the same conduit. Doing so may cause
trouble in the control system due to noise or other factors.
Wiring between indoor and outdoor units
MOCP
NOTE
(A)
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
Circuit breaker
Header outdoor unit
Ground
L1 L2 L3 N
terminal
Indoor unit
Ground
L1L2
Disconnect
switch per NEC
Indoor
power
supply
Circuit
208 /
breaker
230-1-60
– 8 –
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
EN
16-EN
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