System With A Connection Of System Controller To Indoor-Outdoor Transmission Line - Mitsubishi Electric R410A Service Handbook

[2-7 Example System with an MA Remote Controller ]
2-7-5 System with a Connection of System Controller to Indoor-Outdoor
Transmission Line
(1) Sample control wiring
Leave the male
Leave the male
connector on
connector on
CN41 as it is.
CN41 as it is.
SW5-1 OFF ON
SW5-1 OFF ON
OS2
53
TB3
M1 M2
TB7
M1 M2 S
To be left
unconnected
Leave the male
Leave the male
connector on
connector on
CN41 as it is.
CN41 as it is.
SW5-1 OFF ON
SW5-1 OFF ON
OS2
56
TB3
M1 M2
TB7
M1 M2 S
To be left
unconnected
(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.
5) Provide grounding to S terminal on the terminal block for
transmission line for centralized control (TB7) on only
one of the outdoor units.
6) A maximum of 3 system controllers can be connected to
the indoor-outdoor transmission line, with the exception
that only one G(B)-50A may be connected.
7) When the total number of indoor units exceeds 26, it may
not be possible to connect a system controller on the in-
door-outdoor transmission line.
In a system to which more than 18 indoor units including
one or more indoor units of 72 model or above are con-
nected, there may be cases in which the system control-
HWE14080
L11
Move the male connector
from CN41 to CN40.
SW5-1 OFF ON
Group
OS1 OC
52 51
TB3 TB3 TB5
M1 M2 M1 M2 M1 M2
TB7 TB7
M1 M2 S M1 M2 S
To be left
unconnected
To be connected
L21
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
Group
OS1 OC
55 54
TB3 TB3
TB5
M1 M2 M1 M2
M1 M2
TB7 TB7
M1 M2 S M1 M2
S
To be left
unconnected
To be left
unconnected
System controller
A B S
Interlock operation with
the ventilation unit
L12
Group
IC IC
01 02
TB15 TB5 TB15
S 1 2 M1 M2 S 1 2
A B A B
MA MA
L22
Group
IC IC
04 05
TB5 TB15
TB15
S 1 2 M1 M2 S 1 2
A B
MA
m3
Note1
Note1 LM adapters cannot be connected to the
indoor-outdoor transmission line.
ler cannot be connected to the indoor-outdoor
transmission line.
Refer to the DATABOOK for further information about
how many booster units are required for a given system.
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Maximum distance (1.25mm
L11+L12 200m [656ft]
L21+L22 200m [656ft]
L25 200m [656ft]
2) Transmission line for centralized control
L31+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)
L25+L31+L12(L11) 500m [1640ft]
L12(L11)+L31+L22(L21) 500m [1640ft]
- 38 -
Group
LC
IC
03 07
TB5 TB15 TB5
M1 M2 S 1 2 M1 M2 S
A B
MA
LC
IC
08
06
TB5 TB15 TB5
M1 M2 S 1 2 M1 M2 S
A B
MA
2
[AWG16] or larger)
GB