Lennox VEOA042N432U, Installation & Operation Instructions

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Multi Variable Air Conditioners Fresh Air Series Indoor Unit
7
3.3 Requirements for Communication Line
NOTE! 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
lineCable between
IDU unit and wired
controller
L (m/ft.)
Wire size
(mm 2 /AWG)
Material
standard
Remarks
Light/Ordinary
polyvinyl
chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤250(820-1/5)
2×0.75~2×1.25
(2×AWG18~
2×AWG16)
IEC 60227-5
1
）
The cord shall be Circular cord
(the cores shall be twisted
together).
2
）
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 indoor unit (outdoor unit)
Fig 3.3.2
Material Type
Total Length L(m) of
Communication Cable
between IDU Unit and
IDU (ODU ) Unit
L(m/ft.)
Wire size
(mm
2
/AWG)
Material
Standard
Remarks
Light/Ordinary
polyvinyl
chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤1000(3280-5/6)
≥2×0.75
(≥2×AWG18) IEC 60227-5
1
）
If the wire diameter is enlarged
to 2×1mm
2
(2×AWG16,), the
total communication line length
can reach 1500 m (4921-1/4ft.).
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.