Toshiba MMU-AP0091H Installation Manual page 88

Design of control wiring
Power supply
Single phase
220-240V 50Hz
220V~60Hz
Earth
[Central remote controller] (Option)
TCB-SC642TLE (For Line 64)
• Wire specification, quantity, size of crossover wiring and remote controller wiring
Name
Crossover wiring
(indoor-indoor / indoor-outdoor / outdoor-outdoor
control wiring, central control wiring)
Remote controller wiring
(1) The crossover wiring and central control wiring use 2-core non-polarity transmission wires. Use 2-core
shield wires to prevent noise trouble. In this case, close (connect) the end of shield wires, and perform the
functional grounding for the end of the shield wires which are connected to both indoor and outdoor units.
For the shield wires which are connected between the central remote controller and the outdoor unit,
perform the functional grounding at only one end of central control wiring.
(2) Use 2-core and non-polarity wire for remote controller. (A, B terminals)
Use 2-core and non-polarity wire for wiring of group control. (A, B terminals)
(Open)
Transmission wire for control
between outdoor units
Transmission wire for control
between outdoor unit and
indoor unit
Q'ty
2 cores
2 cores
Connection of shield wire must be connected
(Connected to all connecting sections in each outdoor unit)
Connection of shield wire must be connected
(Connected to all connecting sections in each indoor unit)
Size
Up to 500m Up to 1000m 1000 to 2000m
2
1.25mm
0.5 to 2.0mm 2 —
88
Wired
remote controller
Specification
2
2.0mm Shield wire
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