Toshiba MMW-UP0271LQ-E Installation Manual page 28

<In the case of combining with outdoor units of Super Modular Multi System u series (SMMS-u)>
Follow the wiring specifications in the table below even when units other than U series are mixed in the indoor units
and remote controllers to be connected.
Uv line and Uc line (L2, L3, L4)
(2-core shield wire, non-polarity)
Uh line (L1)
(2-core shield wire, non-polarity)
U (v, h, c)
• line means of control wiring.
Uv
line: Between indoor and outdoor units.
Uh
line: Central control line.
Uc
line: Between outdoor and outdoor units.
Uv Uc
• line and line are independent from another refrigerant line. Total length of
in each refrigerant line is up to 1000 m.
REQUIREMENT
For connection of Uv line / Uc line or Uh 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
<U series>
U3 U4
U4
Uh
Outdoor unit
Uv
(SMMS-u)
U1 U2 U5 U6
U2
<U series>*
U1 U2
U4
Indoor unit
Uv
<U series>*
Remote controller
*Even if the indoor units, the remote controllers, 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.
53-EN
Wire size: 1.0 to 1.5 mm²
1.0 to 1.5 mm²
Wire size:
2.0 mm²
Uv
and
[Uh line]
L1 = Up to 2000 m
[Uv and Uc line]
L2 = Up to 1000 m
(L3 + L4) = Up to 1000 m
U3 U4 U3 U4
U3
Uh Uh
Uc Uv Uc Uv Uc
U1 U2 U5 U6 U1 U2 U5 U6
U1
U1 U2 U1 U2
U4 U4
Uv Uv
A B A B A B
U6 U6 U6
– 27 –
<In the case of combining with outdoor units other than Super Modular Multi System u series (SMMS-u)>
Control wiring between indoor units, and outdoor unit
(2-core shield wire, non-polarity)
Central control line wiring (L1)
(Up to 1000 m)
(2-core shield wire, non-polarity)
(Up to 1000 m)
Control wiring between outdoor units (L4)
(2-core shield wire, non-polarity)
(Up to 2000 m)
• 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
Uc (L3 + L4)
lines
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>*
Central control device
<Other than U series>
U1 U2
U4
Uv
A B
U6
<U series>*
Remote controller
*Even if the indoor units, the remote controllers, 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.
(L2, L3)
Wire size:
Wire size:
Uh
U3 U4
U3 U4
U3 U4 U3 U4
U4 U3
Outdoor unit
(SMMS-i)
U1 U2 U1 U2
U2 U5 U6 U1
(SMMS-e)
(MiNi SMMS)
etc.
<U series>*
U1 U2 U1 U2
U4 U4
Indoor unit
Uv Uv
A B
U6
1.25 mm² (Up to 1000 m)
2.0 mm² (Up to 2000 m)
1.25 to 2.0 mm² (Up to 100 m)
[Communication line]
(L1 + L2 + L3) = Up to 2000 m
L4 = Up to 100 m
U3 U4
U1 U2
U5 U6 U5 U6
U1 U2 U1 U2
U4 U4
Uv Uv
A B A B A B
U6 U6 U6
54-EN