Gree GMV-V72W/A-F Owner's Manual page 36

For example, two wired controllers control multiple IDUs and the graphic of connection between IDU
and wired controller is:
(2)Select communication wire between ODU and IDU
Material Type
between IDU Unit and IDU
Light/Ordinary
polyvinyl chloride
sheathed cord.
NOTE：All of the selected communication wire must be consistent with local laws and regulations.
4.7.3.2 Connection mode of communication
(1) All communication wires of Ultra Heat GMV must be connected in series rather than in star.
Total Length L(m) of
Communication Cable
(ODU ) Unit m(feet)
L≤1000(3280-5/6)
Fig.35
Wire size
1. If the wire diameter is enlarged to 2
×AWG16, the total communication length can
reach 1500m (4921-1/4feet).
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.36
32
Ultra Heat GMV Multi VRF
Remarks