Mitsubishi Electric PURY-P120TJMU-A, Service Handbook, Page: 43 / 411

- 34 -
[
II
Restrictions ]
GB HWE0913A
4. A system in which a system controller is connected to the transmission line for centralized control and which is pow-
ered from an outdoor unit
(1) Sample control wiring
(2) Cautions
1) ME remote controller and MA remote controller cannot both be con-
nected to the same group of indoor units.
2) No more than 2 MA remote controllers can be connected to a group
of indoor units.
3) Do not connect the terminal blocks (TB5) on the indoor units that are
connected to different outdoor units with each other.
4) Replacement of male power jumper connector (CN41) must be per-
formed only on one of the outdoor units.
5) Short-circuit the shield terminal (S terminal) and the earth terminal (
) on the terminal block for transmission line for centralized control
(TB7) on the outdoor unit whose power jumper connector is mated
with CN40.
6) When the number of the connected indoor units is as shown in the
table below, one or more transmission boosters (sold separately)
are required.
To connect two transmission boosters, connect them in parallel.
(Observe the maximum number of connectable indoor units that are
listed in the specifications for each outdoor unit.)
Œ
The left table shows the number of transmission boosters
that is required by the system with three BC controllers. For
each BC controller that is subtracted from the above-men-
tioned system, two additional indoor units can be connected.
7) When a power supply unit is connected to the transmission
line for centralized control, leave the power jumper connec-
tor on CN41 as it is (factory setting).
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Same as [5] 3.
2) Transmission line for centralized control
L31+L32(L21) 200m [656ft]
3) MA remote controller wiring
Same as [5] 1.
4) Maximum line distance via outdoor unit
(1.25mm
2
[AWG16] or larger)
L32+L31+L12(L11) 500m [1640ft]
L32+L22(L21) 500m [1640ft]
L12(L11)+L31+L22(L21) 500m[1640ft]
IC
TB5
S
TB15
1 2
01
IC
TB5
S
TB15
1 2
02
A
1 B
2
MA
A
1 B
2
MA
LC
TB5
S
07
IC
TB5
S 1 2
TB15
IC
TB5
S
TB15
1 2
05 04
LC
TB5
S
08
IC
TB5
S
TB15
1 2
03
A
1 B
2
MA
IC
TB5
S
TB15
1 2
06
A
1 B
2
MA
A
1 B
2
MA
m3
L31
System controller
A B S
Note1
L32
OC
To be connected
m2
m1
Note1 When only the LM adapter is connected,
leave SW2-1 to OFF (as it is).
Note2 LM adapters require the power supply
capacity of single-phase AC 208 - 230V.
TB3
TB7
S
51
OS
TB3
TB7
M1 M2 M1 M2
M1 M2 M1 M2
M1 M2 M1 M2 M1 M2 M1 M2 M1 M2
M1 M2 M1 M2 M1 M2 M1 M2
M1 M2 M1 M2 M1 M2
M1 M2 M1 M2
S
52
OC
TB3
TB7
S
55
OS
TB3
TB7
S
56
Group
Group
Group
Group Group
Interlock operation with
the ventilation unit
Move the male connector
from CN41 to CN40.
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
To be left
unconnected
To be left
unconnected
To be left
unconnected
S
BC
TB02
53
S
BC
TB02
57
L22
L21
L12
L11
Number of transmission booster
(sold separately) required
1 unit 2 units
When the P72 and P96 models are
not included in the connected in-
door units
27 - 50 units -
When the P72 and P96 models are
included in the connected indoor
units
21 - 39 units 40 - 50 units