Toshiba MMD-AP0071SH-C Service Manual page 43

8
ELECTRIC WORK
Power supply cord and communication wires specifications
Power supply cord and communication wires are procured locally.
For the power supply specifications, follow to the table below. If capacity is little, it is dangerous because overheat or
seizure may be caused.
For specifications of the power capacity of the outdoor unit and the power supply wires, refer to the Installation
Manual attached to the outdoor unit.
Indoor unit power supply
• For the power supply of the indoor unit, prepare the exclusive power supply separated from that of the outdoor unit.
• Arrange the power supply, earth leakage breaker, and main switch of the indoor unit connected to the same
outdoor unit so that they are commonly used.
• Power supply cord specification : Cable 3-core 2.5mm², in conformity with Design 60245 IEC 57.
Power supply
Power supply switch/Earth leakage breaker or power supply wiring/fuse rating for
indoor units should be selected by the accummulated total current values of the indoor units.
Power supply
Power supply wiring
Control wiring, Central controller wiring
• 2-core with polarity wires are used for the Control wiring between indoor unit and outdoor unit and Central
controller wiring.
• To prevent noise trouble, use 2-core shield wire.
• The length of the communication line means the total length of the inter-unit wire length between indoor and
outdoor units added with the central control system wire length.
Control wiring between indoor unit and
outdoor unit (2-core shield wire)
Communication line
Central control line wiring
(2-core shield wire)
Remote controller wiring
• 2-core with non-polarity wire is used for wiring of the remote controller wiring and group remote controllers wiring.
Remote controller wiring, remote
Twist wire: 0.5mm
controller inter-unit wiring
Total wire length of remote controller
In case of wired type only
wiring and remote controller inter-unit
In case of wireless type included
wiring = L + L1 + L2 + ... Ln
Total wire length of remote controller inter-unit wiring = L1 + L2 + ... Ln
Indoor unit Indoor unit
Remote
controller
L1
wiring
Remote
Remote controller inter-unit wiring
controller
220V, 50Hz
Below 20m Twist wire : 2.0 mm²
Below 50m Twist wire : 3.5 mm²
(Up to 1000m) Twist wire : 1.25 mm²
Wire size
(Up to 2000m) Twist wire : 2.00
(Up to 1000m) Twist wire : 1.25 mm²
Wire size
(Up to 2000m) Twist wire : 2.00
CAUTION
2 to 2.0mm 2 × 2
The remote controller wire
(Communication line) and
AC220V wires cannot be parallel
to contact each other and cannot
Up to 500m
be stored in the same conduits.
Up to 400m
If doing so, a trouble may be
caused on the control system due
Up to 200m
to noise, etc.
Indoor unit Indoor unit
L2 Ln
(Max. 8 units)
Cable connection
• Be sure to pass the wire through the wire connection port of the indoor unit.
• Keep a margin (Approx. 100mm) on a wire to hang down the electric parts box at servicing, etc.
• The low-voltage circuit is provided for the remote controller.
• Before remove the electric parts cover, remove the cover plate.
• Remove the cover of the electric parts box by taking off the mounting screws (2 positions) and pushing the
hooking section. (The cover of the electric parts box remains hanged to the hinge.)
• Tighten the screws of the terminal block, and fix the wires with cord clamp attached to the electric parts box.
(Do not apply tension to the connecting section of the terminal block.)
• Be sure to set a loop for the connecting wire of the storing part of the indoor unit electric parts; otherwise the
electric parts box cannot be drawn out in service time.
• Mount the cover of the electric parts box without pinching wires.
mm²
Power supply cord
mm²
Cable cramp
R S
(L) (N)
Earth line
Power supply cord
REQUIREMENT
Control wire
Remote controller wire
Electric parts box cover
Cover plate