Gree Ultra Heat GMV Multi VRF Series User Manual

Ultra Heat GMV Multi VRF_Heat Recovery Serial
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(4) Communication between IDU and wired controller.
(5) Connection between IDU and light board receiver.
(6) Communication between different refrigeration systems.
(7) Graphics of general communication connection.
Fig.35
4.7.2 Communication mode of Ultra Heat GMV Multi VRF units
CAN bus is taken for communication between IDU and ODU and communication among IDUS.
4.7.3 Selection and connection mode of communication line
4.7.3.1 Select communication material
NOTICE! 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
Material type
Total length of communication
line between IDU unit and wired
controller L m(feet)
Wire size
Remarks

Gree Ultra Heat GMV Multi VRF Series Specifications

General

Brand	Gree
Model	Ultra Heat GMV Multi VRF Series
Category	Air Conditioner
Language	English