Requirements For Communication Line - Gree GMV-ND09A/A-T(U) Owner's Manual

ventilation directly to outside.
This ventilation is necessary to avoid the danger of CO poisoning which can occur if a carbon
monoxide producing device continues to operate in the enclosed area. Carbon monoxide emission
can be (re)circulated throughout the building if the furnace or air handler is operating in any mode.
CO can cause serious illness including permanent brain damage or death.

3.3 Requirements for Communication Line

If the unit is installed in the place with strong electromagnetic interference, shielded
wire must be applied on the communication wire between indoor unit and wired controller. Twisted
pair line with shielding function must be applied on the communication wire between indoor unit and
indoor unit (outdoor unit).
3.3.1 Select communication line for indoor unit and wired controller
communication wire
Wire type
between indoor unit
and wired controller
Light/Ordinary
polyvinyl chloride
sheathed cord.
(UL60335-2011)
Total length of
Wire size
L≤250m
2×AWG18~
(L≤820-1/5ft.)
2×AWG16
Fig.3.3.1
Wire
standard
1. Total length of communication cable can't
exceed 250m (820-1/5ft.).
2. The cord shall be Circular cord (the cores
UL60335-
shall be twisted together).
2011
3. If unit is installed in places with intense
magnetic field or strong interference, it is
necessary to use shielded wire.
6
GMV DC Air Handler
Remarks