2. M-NET control
SYSTEM DESIGN
204
Table A
Determining the reusability of the transmission line
Reusability of Transmission line
Is the 2-core cable used?
Checking the transmission cable
Refer to Table A.
Is the farthest transmission
line of indoor/outdoor unit
less than 120m? *1
Fix the ground fault current.
Less than 200m
More than 0.5mm
2
Less than 130m
More than 0.3mm
2
Wiring diameter
Chart A. Centralized transmission line applicable diameter
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
Is the shielded wiring used?
YES
NO
YES
NO
YES
NO
NO
YES
YES
NO
Is there a ground fault
current?
Is the farthest
transmission line less
than 200m?
Farthest transmission line of
centralized controller must be less
than 200m.
Check the number of indoor units,
farthest length of transmission line
and read the applicable diameter
from the diagram B.
Handle the wiring that are not used
as shown in figure A.
Farthest transmission line of
centralized controller must be less
than 500m.
Check the farthest transmission line
length of centralized controller and
read the applicable diameter.
Is the farthest transmission
line of centralized controller
less than 500m?
Is the diameter of the
transmission line more than
1.25mm
2
?
Is the diameter of the current
wiring thicker than the diameter
read from diagram B?
Change the wiring to shielded wiring
with more than 1.25mm
2
.
Is the diameter of
centralized transmission line
more than 1.25mm
2
?
Change the centralized transmission
line diameter to more than 1.25mm
2
.
Length between power
supply unit to outdoor unit
and system controller
Shielded wiring should be connected
to the terminal at the power supply
unit side (outdoor unit).
Is the diameter of the current
wiring thicker than the
diameter read from chart A?
Is the system single
refrigerant system?
Existing transmission line can
be reused.
Please contact your local distributor
for more information.
*1: When the remote controller cable (ME remote controller and system remote
controller) exceeds 10m, use cables with the same specification as
transmission cables (indoor/outdoor and centralized controller).
shielded wire
Figure A. Non-using wiring
Side:
Close to power supply unit
(Outdoor unit, Power supply unit)
Non using wiring on the power supply side (Outdoor unit, Power supply
unit) should be connected to the shield terminal. The non-using wiring on
the opposite side should be open and insulated.
Non-shielded wire
A
B
S
A
B
S
A
B
S
A
B
S
Type of cable
Cable size
Remarks
Sheathed 2-core cable (unshielded)
CVV
2
Shielding wire (2-core)
CVVS, CPEVS or MVVS
Transmission cables
ME Remote controller cables
CVVS, MVVS : PVC insulated PVC jacketed shielded control cable
CPEVS :
Connected with simple remote controller.
PE insulated PVC jacketed shielded communication cable
CVV : PV insulated PVC sheathed control cable
—
Max length : 200m [656ft]
(L
i
)
MA Remote controller cables
When 10m [32ft] is exceeded, use cables with
the same specification as transmission cables.
More than 1.25 [AWG16]
2
0.3 1.25 [AWG22 16]
(0.75 1.25 [AWG18 16])
2
2
0.3 1.25 [AWG22 16]
(0.75 1.25 [AWG18 16])
Содержание PUHY-RP-Y(S)JM-B
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