Mitsubishi Electric PUHY-RP-Y(S)JM-B Data Book page 207

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