GMV DC Air Handler
5
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
Fig.3.3.1
Material type
Total length of
communication line
between indoor unit and
wired controller L
Numbers × size
Remarks
Light/Ordinary
polyvinyl
chloride
sheathed cord.
L≤250m
(L≤820
-1/4ft.)
2×AWG18~2×AWG16
1. Total length of communication line
can't exceed 250m (820-1/4ft.).
2. The cord shall be Circular cord (the
cores 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.
3.3.2 Select communication line for indoor unit and outdoor unit
Fig.3.3.2
Summary of Contents for GMV-ND09A/B-T
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