Carrier TOSHIBA MML-UP0071H-UL Installation Manual page 11

<In the case of combining with outdoor units other than U series outdoor unit>
Control wiring between indoor units, and outdoor unit
(L2, L3)
(2-core shield wire, non-polarity)
Central control line wiring (L1)
(2-core shield wire, non-polarity)
Control wiring between outdoor units (L4)
(2-core shield wire, non-polarity)
• The length of the communication line (L1 + L2 + L3) means the total length of the inter-unit wire length between
indoor and outdoor units added with the central control system wire length.
REQUIREMENT
For connection of between indoor and outdoor units line / between outdoor and outdoor units line or central control
line, wire each line using wires with the same type and size. If different wire types and size are mixed and used in
a system, communication trouble is caused.
<U series>*
Uh
Central control device
U3 U4
U3 U4
<Other than U series>
U3 U4
U4
Outdoor unit
U1 U2
U2 U5 U6
<U series>*
U1 U2
U4
Indoor unit
Uv
A
<U series>*
Remote control
*Even if the indoor units, the remote controls, and the central control device are models
other than U series, their system diagrams for the wiring specifications are the same as the
system diagram above.
19-EN
(Up to 3280'10" (1000 m))
AWG16
Wire size:
AWG14
(Up to 6561'8" (2000 m))
Wire size: AWG16 to AWG14 (Up to 328'1" (100 m))
[Communication line]
(L1 + L2 + L3) = Up to 6561'8" (2000 m)
L4 = Up to 328'1" (100 m)
U3 U4 U3 U4
U3
U1 U2 U1 U2
U1 U5 U6 U5 U6
U1 U2 U1 U2 U1 U2
U4 U4
Uv Uv Uv
B A B A B
U6 U6 U6
 Power supply wire
Recommended wire diameter and wire length for power supply wire.
Power supply wiring
▼Electric characteristics
Model
MML-UP0071H-UL
MML-UP0091H-UL
MML-UP0121H-UL
MML-UP0151H-UL
MML-UP0181H-UL
MML-UP0241H-UL
 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
Remote
L
control
wiring
Remote
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.
CAUTION
U4
Do not put the remote control wires and power supply wires (AC208 / 230 V) in the same conduit. Doing so may cause
A B
U6
trouble in the control system due to noise or other factors.
– 10 –
Wire size: 2 × AWG12
Ground 1 × AWG12 or thicker
MOCP : Maximum Overcurrent Protection (Amps)
Voltage Range (V)
Power Supply
Min Max
208 / 230 V-1-60 Hz 187 253
Wire size: AWG20
In case of wired type only
In case of wireless type included
Indoor unit Indoor unit
L1 L2 Ln
(Max. 8 units)
Remote control inter-unit wiring
Up to 164'1" (50 m)
MCA : Minimum Circuit Amps
MCA MOCP
(A) (A)
0.4 15
0.4 15
0.6 15
0.6 15
0.7 15
0.7 15
Up to 1640'5" (500 m)
Up to 1312'4" (400 m)
Up to 656'2" (200 m)
Indoor unit
EN
20-EN