14
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)
Wire Size
(Up to
3280’10”(1000m)) AWG16
(Up to
6561’8” (2000m)) AWG14
Central control line wiring (2-core shield wire)
Wire Size
(Up to
3280’10” (1000m)) AWG16
(Up to
6561’8” (2000m)) AWG14
▼
VRF Remote controller wiring (A/B)
2-core with non-polarity wire is used for wiring of the remote controller wiring.
Remote control wiring.
Wire size: AWG20
Total wire length of remote control wiring
Up to
1640’5” (500m)
▼
PMV (Pulse motor wiring (6 wire)
PMV wiring.
Wire size: AWG20 to 22
CAUTION
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
Terminal block
Remote control
unit
Remote control wire
(Field supply)