Gree GMV-224WM/G-X Owner's Manual page 48

GMV DC Inverter VRF
3.9.2 Communication Material Selection
NOTE!
If the air conditioning unit is installed in a place with strong electromagnetic interference, the
communication line between the indoor unit and the wired controller must adopts shielded wires; the
communication line between indoor units (between indoor unit and outdoor unit) must use the shielded
twisted pairs.
(1) Selection of communication line between indoor unit and wired controller.
Wire type
Light / ordinary PVC
sheathed twisted copper
core cord
Shielded light/ordinary PVC
sheathed twisted copper
core cord
The connection between the indoor unit and the wired controller is shown as below:
(2) Selection of communication line between outdoor unit and indoor unit.
Length of communication wire
Wire type
another indoor/outdoor unit(m)
Light / ordinary PVC
sheathed twisted
copper core cord
Shielded
light/ordinary PVC
sheathed twisted
copper core cord
Total length of
communication
wire between Wire diameter
indoor unit and
wired controller
L(m)
L≤250 2×0.75~2×1.25
L≤250 2×0.75~2×1.25
between indoor unit and
L≤1000
L≤1000
Wire standard
(mm )
2
IEC 60227-5:2007
IEC 60227-5:2007
Fig.3.9.2
Wire
diameter Wire standard
(mm )
2
≥2×0.75 IEC 60227-5:2007
≥2×0.75 IEC 60227-5:2007
44
Remark
The length of
communication line can't
exceed 250m.
When the installation
environment of the unit is in
strong magnetic or strong
interference, the shielded
wires shall be used.
Remark
If the wire diameter is
increased to 2×1mm , the
2
length of communication
line can't be increased,
while the length of the
communication line can't be
more than 1500m.
When the installation
environment of the unit is in
strong magnetic or strong
interference, the shielded
wires shall be used.