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Total length of communication
wire between Mode Exchange
Type of wire
indoor/outdoor unit L(m)
Light/Ordinary
polyvinyl chloride
sheathed cord
(60227 IEC
52/60227 IEC 53)
3.4 Wiring Requirement
Power cord size and capacity of air switch.
Model
NCHS2D
NCHS4D
NCHS8D
NOTES!
① Above circuit breaker and power cord specification are selected according to the max power
(max current).
② Specification of power cord is based on the working condition where ambient temperature is
40°C and multi-core copper cable (working temperature is 90°C, e.g. power cable with YJV
cross-linked copper, insulated PE and PVC sheath) is lying on the surface of slot. If working
condition changes, please adjust the specification according to national standard.
③ Specification of circuit breaker is based on the working condition where ambient temperature
of circuit breaker is 40°C. If working condition changes, please adjust the specification
according to national standard.
④ When installating the cut-off device next to the unit, the min space between every two levels of
cut-off device should be 3mm (for indoor unit and outdoor unit).
Box and another
L≤1000
Power
220-240V ~50/60Hz
220-240V ~50/60Hz
220-240V ~50/60Hz
Wire
Material
diameter
standard
(mm
)
2
IEC
≥2×0.75
60227-5:2007
Capacity of
air switch
area for earthing
(A)
6
6
6
8
GMV6 HR Mode Exchange Box
Remarks
1. If the wire diameter is enlarged to
2×1mm
, the total communication length
2
can reach 1500m.
2. The cord shall be circular cord (the
cores shall be twisted together).
Communication wire can be longer if
wire diameter is 2×1mm
length cannot exceed 1500m.
3. If unit is installed in places with
intense magnetic field or strong
interference, it's necessary to use
shielded wire.
Min sectional
Min sectional
area for power
wire (mm
2
)
1.0
1.0
1.0
. But the total
2
cord(mm
2
)
1.0
1.0
1.0
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