System With A Connection Of System Controller To Centralized Control Transmission Line - Mitsubishi Electric HP120TNU-A Service Handbook

[2-7 Example System with an MA Remote Controller ]
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
Leave the male
connector on
CN41 as it is.
SW5-1 OFF
OS
52
TB3
M1M2
TB7
M1M2
S
To be left
unconnected
Leave the male
connector on
CN41 as it is.
SW5-1 OFF
OS
56
TB3
M1M2
TB7
M1M2
S
To be left
unconnected
(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 (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 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.)
When the P72 and P96 models are
not included in the connected indoor
units
When the P72 and P96 models are
included in the connected indoor
units
HWE18220_GB
L11
Move the male connector
from CN41 to CN40.
SW5-1 OFF
Group
OC BC
51 53
TB3 TB02
M1M2 S
M1M2 M1M2
TB7
M1M2 S
To be connected
L21
Leave the male
connector on
CN41 as it is.
Group
SW5-1 OFF
OC BC
55 57
TB3 TB02
M1M2 M1M2 S
M1M2
TB7
To be left
M1M2
S
unconnected
Note1
System controller
A B S
Number of transmission booster
(sold separately) required
1 unit 2 units
27 - 50 units -
21 - 39 units 40 - 50 units
Interlock operation with
the ventilation unit
L12
Group Group
IC IC
01 02
TB5 TB15 TB5 TB15
S 1 2 M1M2 S 1 2
A B A B
1 2 1 2
MA MA
L22
Group
IC IC
04 05
TB5 TB5 TB15 TB5
TB15
S 1 2 M1M2 S 1 2 M1M2
A B
1 2
MA
m3
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.
The left table shows the number of transmission boosters that is re-
quired by the system with three BC controllers. For each BC control-
ler added or subtracted, subtract or add two indoor units.
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
2
(1.25mm [AWG16] or larger)
L32+L31+L12(L11)
L32+L22(L21) 1000 m [3280ft] (500 m [1640ft])
L12(L11)+L31+L22(L21)
*1 If a given system includes one or more unit or remote controller
that does not support the maximum allowable cable distance of
1000 m [3280 ft], the maximum allowable cable distance in the
system will be 500 m [1640 ft]. Refer to the latest catalog for in-
formation on which units and remote controllers support the max-
imum allowable cable distance of 1000 m [3280 ft].
LC
IC
03 07
TB5 TB15 TB5
M1M2 S 1 2 M1M2 S
A B
1 2
MA
LC
IC
06 08
TB15 TB5
M1M2 S
S 1 2
A B
1 2
MA
*1
1000 m [3280ft] (500 m [1640ft])
*1
1000 m [3280ft] (500 m [1640ft])
chapter 2 -
*1
19