Mitsubishi Electric PUHY-HP120TNU-A, Service Handbook, Page: 45 / 324

[2-7 Example System with an MA Remote Controller ]
HWE18240_GB 18
- chapter 2
2 Restrictions
2-7-4 System with a Connection of System Controller to Centralized Control
Transmission Line
(1) Sample control wiring
An example of a system in which a system controller is connected to the transmission cable for the centralized control system
and the power is supplied from the outdoor unit
(2) Cautions
1) ME remote controller and MA remote controller cannot both be
connected 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
performed only on one of the outdoor units (not required if power
to the transmission line for centralized control is supplied from a
controller with a power supply function, such as GB-50ADA).
5) Short-circuit the shield terminal (S terminal) and the earth termi-
nal ( ) on the terminal block for transmission line for central-
ized control (TB7) on the outdoor unit whose power jumper
connector is mated with CN40.
6) A transmission booster is required in a system to which more
than 32 indoor units (26 units if one or more indoor units of the
72 model or above is connected) are connected.
Œ
Refer to the DATABOOK for further information about how
many booster units are required for a given system.
7) When a power supply unit is connected to the transmission line
for centralized control, leave the power jumper connector on
CN41 as it is (factory setting).
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Same as 2-7-3
2) Transmission line for centralized control
L31+L32(L21) 200m [656ft]
3) MA remote controller wiring
Same as 2-7-1
4) Maximum line distance via outdoor unit
(1.25mm
2
[AWG16] or larger)
L32+L31+L12(L11) 1000 m [3280ft] (500 m [1640ft])
*1
L32+L22(L21) 1000 m [3280ft] (500 m [1640ft])
*1
L12(L11)+L31+L22(L21) 1000 m [3280ft] (500 m [1640ft])
*1
*1 If a given system includes one or more unit or remote control-
ler that does not support the maximum allowable cable dis-
tance of 1,000 m [3280 ft], the maximum allowable cable
distance in the system will be 500 m [1640 ft]. Refer to the lat-
est catalog for information on which units and remote control-
lers support the maximum allowable cable distance of 1,000
m [3280 ft].
IC
TB5
S
TB15
1 2
01
IC
TB5
S
TB15
1 2
02
A B
MA
A B
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 B
MA
IC
TB5
S
TB15
1 2
06
A B
MA
A B
MA
M1 M2 M1 M2 M1 M2 M1 M2
M1 M2 M1 M2 M1 M2 M1 M2
L12 L11
L22 L21
m3
L31
A B S
L32
Note1
System controller
OC
TB3
TB7
S
51
To be connected
To be left
unconnected
To be left
unconnected
m2
m1
OS1
TB3
TB7
S
52
OS2
TB3
TB7
M1 M2 M1 M2 M1 M2
M1 M2 M1 M2 M1 M2 S
53
OC
TB3
TB7
S
54
OS1
TB3
TB7
S
55
OS2
TB3
TB7
M1 M2 M1 M2 M1 M2
M1 M2 M1 M2 M1 M2 S
56
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
SW5-1 OFF ON
Group Group Group
Group Group
Interlock operation with
the ventilation unit
Note1 When only the LM adapter is connected,
leave SW5-1 to OFF (as it is).
Note2 LM adapters require the power supply
capacity of single-phase AC 220/240V.
To be left
unconnected
To be left
unconnected
To be left
unconnected
Move the male connector
from CN41 to CN40.