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GMV6 DC Inverter VRF Units Technical Sales Guide
(2) Selection of communication line between outdoor unit and indoor unit.
Material Type
Total Length L (m) of
Communication Cable
between Indoor Unit and
Indoor (Outdoor) Unit
Wire size (mm
2
) Material Standard Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤1000 ≥2×0.75 IEC 60227-5:2007
1.If the wire diameter is
enlarged to 2 × 1 mm
2
, 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
intense magnetic eld or strong
interference, it is necessary to
use shielded wire.
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.
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