Toshiba MMD-UP0071SPH-UL Installation Manual page 16

<In the case of combining with outdoor units other than U series outdoor unit>
Control wiring between indoor units, and outdoor unit
(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
<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.
29-EN
(L2, L3)
AWG16 (Up to 3280'10" (1000 m))
Wire size:
AWG14 (Up to 6561'8" (2000 m))
AWG16
Wire size: to (Up to 328'1" (100 m))
AWG14
[Communication line]
(L1 + L2 + L3) = Up to 6561'8" (2000 m)
L4 = Up to 328'1" (100 m)
U3 U4 U3 U4
U3
U1 U1 U2 U5 U6 U1 U2 U5 U6
U1 U2 U1 U2
U4 U4
Uv Uv
A B A B A B
U6 U6 U6
– 15 –
 Power supply wire
• Recommended wire diameter and wire length for power supply wire.
Power supply wiring
▼Electric characteristics
Model
MMD-UP0071SPH-UL
MMD-UP0091SPH-UL
MMD-UP0121SPH-UL
MMD-UP0151SPH-UL
MMD-UP0181SPH-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
Remote
control
wiring
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 CAUTION
U1 U2
U4
Uv
The remote control wire (Communication line) and AC208 / 230 V wires cannot be parallel to contact each other and
A B cannot be stored in the same conduits. If doing so, a trouble may be caused on the control system due to noise or other
U6
factor.
Wire size: 2 × AWG12
Ground
Voltage Range (V)
Power Supply
Min
208/230 V-1-60 Hz 187
Wire size: AWG20 to AWG14
In case of wired type only
In case of wireless type included
Indoor unit Indoor unit Indoor unit
L
L1 L2
Remote
Remote control inter-unit wiring
control
Up to 164'1" (50 m)
1 × AWG12 or thicker
MCA: Minimum Circuit Amps
MOCP: Maximum Overcurrent Protection (Amps)
MCA MOCP
Max (A) (A)
0.9 15
1.0 15
253 1.0 15
1.0 15
1.2 15
Up to 1640'5" (500 m)
Up to 1312'4" (400 m)
Up to 656'2" (200 m)
Indoor unit
Ln
(Max. 8 units)
30-EN