BGH GMV6 Technical Sales Manual page 129

Model selection of ODU and IDU communication cord.
Total Length L (m) of
Communication Cable
Material Type
between Indoor Unit and
Indoor (Outdoor) Unit
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
9.2.2 Communication connection method
The connection of IDU and ODU communication cord must adopt series connection, not starred
connection; the terminal side IDU of IDU and ODU communication cord must be connected with the
matched resistance (placed in the package bag of ODU), the IDU of energy recovery ventilation is not
suggested to be set as the master indooe unit.
Wire size (mm
L≤1000 ≥2×0.75
GMV6 DC Inverter VRF Units
2
) Material Standard
IEC 60227-5:2007
Technical Sales Guide
Remarks
1.If the wire diameter is
2
enlarged to 2 × 1 mm , the total
communication line length can
reach 1500 m.
2.The cord shall be Circular
cord (the cores shall be twisted
together).
3.If unit is installed in places with
interference, it is necessary to
use shielded wire.
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