Select Communication Line For Indoor Unit And Outdoor Unit - Lennox VRF VEHD019N432U Installation & Operation Instructions

Total length of
communication wire between
Wire type
indoor unit and wired
controller (m/feet)
Light/Ordinary
polyvinyl
chloride
sheathed L≤250(850)
cord. (60227
IEC 52/60227
IEC 53)

3.3.2 Select communication line for indoor unit and outdoor unit

Total length of
communication wire
Wire type
between indoor unit and
indoor unit(outdoor unit)
(communicatio
n line for indoor
unit)
Light/Ordinary
L≤1000(3280)
polyvinyl
chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
(communicatio
n line for
outdoor unit)
Light/Ordinary
L≤1000(3280)
polyvinyl
chloride
sheathed cord.
(60245 IEC 57)
Fig 3.3.1
Wire diameter
(
mm
2×0.75~2×1.25
(2×18~2×16)
Fig 3.3.2
Wire diameter
(
mm
(m/feet)
L≤1000(3280)
≥2×0.75(2×18)
High ESP Fan Coil Indoor Unit
Wire standard
2 /AWG)
1. Total length of
communication cable can't
exceed 250m (850feet).
2. The cord shall be Circular
cord (the cores shall be
IEC
twisted together).
60227-5:2007
3. If unit is installed in places
with intense magnetic field or
strong interference, it is
necessary to use shielded
wire.
Wire standard
2 /AWG)
IEC 60227-5
IEC 60245-1
6
Remark
Remark
1. If the wire diameter is
enlarged to 18AWG, the total
communication cable length
can reach 1500m (4920 feet).
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.