Toshiba MMU-UP YHP-E Series Installation Manual page 17

<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 (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)
y 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
<Other than U series>
Outdoor unit
(SMMS-i)
(SMMS-e)
(MiNi SMMS)
etc.
<U series>*
Indoor unit
<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.
31-EN
1.25 mm² (Up to 1000 m)
Wire size :
2.0 mm² (Up to 2000 m)
Wire size : 1.25 to 2.0 mm² (Up to 100 m)
[Communication line]
(L1 + L2 + L3) = Up to 2000 m
L4 = Up to 100 m
„ Wire connection
REQUIREMENT
y Be sure to connect the wires matching the terminal numbers. Incorrect connection causes a trouble.
y Be sure to pass the wires through the bushing of wiring connection port of the indoor unit.
y Keep a margin (Approx. 100 mm) on a wire to hang down the electrical control box at servicing, etc.
y The low-voltage circuit is provided for the remote controller. (Do not connect the high-voltage circuit)
y Make a loop on the wire for margin of the length so that the electrical control box can be taken out during
servicing.
1. Remove the cover of the electrical control box by taking off the mounting screw and pushing the hooking
section. (The cover of the electrical control box remains hanged to the hinge.)
2. Connect the power supply wire and remote controller wire to the terminal block of the electrical control box.
3. Tighten the screws of the terminal block, and fix the wires with cord clamp attached to the electrical control box.
(Do not apply tension to the connecting section of the terminal block.)
4. Mount the cover of the electrical control box without pinching wires.
(Mount the cover after wiring on the ceiling panel.)
Louver connector
(CN510:White)
Hinge
R S
(L) (N)
Earth wire
Power supply wire
– 16 –
Indoor / Outdoor inter-unit
Cord clamp
wire / Remote controller
terminal block
Uv(U1) Uv(U2) A B
L N
Power supply terminal block
Side D (Space: 8.5 mm)
Screw
Side C (Space: 4 mm)
* Cable clamp can be attached on left side.
Wire
Specification
type
Cabtyre 3-core stranded
cable wire 2.5 mm²
Cabtyre 4-core stranded
cable wire 1.5 mm²
Cable clamping
position
Side D
Side C
32-EN