BGH GMV6 - Communication System Introduction

9
COMMUNICATION SYSTEM INTRODUCTION
GMV6 DC Inverter VRF system adopts CAN communication network, manual DIP switch and polarity to
distinguish communication cord is needless for IDU and just set function DIP for ODU.
9.1 Connection method of communication cord terminal
The connection of all communication is fixed by screws.
wiring screw
terminal board
9.2 Material and wiring method of communication cord
9.2.1 Communication material
If the unit is installed in a place with strong electromagnetic interference, the IDU and communication
cord of wired controller must use shielded wire, and the IDU and IDU (ODU) communication cord must
use shielded twisted-pair.
Model selection of IDU and wired controller communiction cord
.
Material type
Total length of
communication line
between indoor unit and
wired controller L (m)
Wire size (mm
2
)
Material
standard
Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤250 2×0.75~2×1.25
IEC 60227-
5:2007
1.Total length of communication line can't
exceed 250m.
2.The cord shall be Circular cord (the cores
shall be twisted together).
3.If unit is installed in places with intense
necessary to use shielded wire.
The connection of IDU and wired controller is as follow:
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