Gree GMV-72WM/B-U Owner's Manual page 35

4.7.3 Selection and connection mode of GMV5 communication material
4.7.3.1Select communication material
If air conditioners are installed at places where there's strong electromagnetic
interference, the communication wire of IDU and wired controller must use shielded wire and the
communication wire between IDU and IDU/ODU must use shielded twisted pair.
(1) Select communication wire between IDU and wired controller
communication line between
Material type
IDU unit and wired controller
Light/Ordinary
polyvinyl chloride
sheathed cord.
Graphic of connection between IDU and wired controller
(2) Select communication wire between ODU and IDU
Total Length L(m(inch)) of
Communication Cable
Material Type
between IDU Unit and IDU
Light/Ordinary
polyvinyl chloride
sheathed cord.
Total length of
L m(inch)
L≤250(820-1/4)
(ODU ) Unit
L≤1000(3280-7/8)
Wire size
1. Total length of communication line can't
exceed 250m(820-1/4inch).
2. The cord shall be Circular cord (the cores
2×AWG18~
shall be twisted together).
2×AWG16
3. If unit is installed in places with intense
magnetic field or strong interference, it is
necessary to use shielded wire.
Fig.4.7.2
Wire size
1. If the wire diameter is enlarged to 2 ×AWG16,
the total communication length can reach
1500m(4921-1/4inch).
2. The cord shall be Circular cord (the cores
≥2×AWG18
shall be twisted together).
3. If unit is installed in places with intense
magnetic field or strong interference, it is
necessary to use shielded wire.
Fig.4.7.3
31
GMV DC Inverter VRF
Remarks
Remarks