Toshiba MCY-MAP0401HT2D Installations-Handbuch Seite 27

Design of control wiring
• Connect each wire for controlling as shown below.
Central remote controller (Option)
U1 U2
U3 U4
(Open)
[Outdoor unit]
U1 U2 U3 U4
[Indoor unit]
U1 U2
PMV Kit
(Option)
Indoor control
P.C. board
CN82
• Wire specification, quantity, size of crossover wiring and remote controller wiring
Name
Control wiring
(indoor-indoor / indoor-outdoor / outdoor-
indoor 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)
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(Open)
Relay
To other
connector
refrigerant
system
Relay connector
(At shipment from factory : No connection)
Control wiring between indoor and outdoor units
Control wiring between indoor units
U1 U2
Q'ty
Up to 500m
2 cores
2 cores 0.5 to 2.0mm²
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U1 U2 U3 U4
For control For wiring of
wiring between central control
indoor and system
outdoor
Shield earth screw
Connection of shield wire must be connected
(Connected to all connecting sections in each Indoor unit)
U1 U2
Size
Up to 1000m
1.25mm²
—
24
Cable clamp
Control wiring between indoor
and outdoor units
U1 U2
Specification
1000 to 2000m
2.0mm² Shield wire
— —
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