Toshiba TCB-IFDA1GUL Installation Manual page 15

Control wiring, Central control wiring
 2-core with polarity wires are used for the Control wiring between indoor and outdoor unit and Central control 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.
▼ VRF Communication Line (U1/U2)
VRF Control wiring between Dx-Controller and
outdoor unit (2-core shield wire)
Central control line wiring (2-core shield wire)
▼VRF Remote controller wiring (A/B)
 2-core with non-polarity wire is used for wiring of the remote controller wiring.
Remote control wiring.
Total wire length of remote control wiring
▼ PMV (Pulse motor wiring (6 wire)
PMV wiring.
The remote control wire (communication line) and AC208/230V wires cannot be parallel to contact each other and cannot be
stored in the same conduits. If doing so, a trouble may be caused on the control system due to noise, etc.
■Remote control wiring
 As the remote control wire has non-polarity, there is no problem if connections to Dx-Controller terminal blocks A and B are
reversed.
▼ Wiring diagram
Terminal block for
Remote controller wiring of
Dx-Controller
Remote control wire
(Field supply)
(Up to 3280'10"(1000m)) AWG16
Wire Size
(Up to 6561'8" (2000m)) AWG14
(Up to 3280'10" (1000m)) AWG16
Wire Size
(Up to 6561'8" (2000m)) AWG14
Wire size: AWG20
Up to 1640'5" (500m)
Wire size: AWG20 to 22
CAUTION
Terminal block
14
Remote control
unit