Mitsubishi PUHY-EP250 - Grouped Operation of Units in Separate Refrigerant Circuits

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[2-7 Example System with an MA Remote Controller ]
GBHWE12050
2-7-3 Grouped Operation of Units in Separate Refrigerant Circuits
(1) Sample control wiring
(2) Cautions
1) ME remote controller and MA remote controller can not
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. It is not possible to connect a
pair of PAR-31MAA.
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 transmission booster is required in a system to which
more than 32 indoor units (26 units if one or more indoor
units of the 200 model or above is connected) are con-
nected.
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
2
[AWG16] or larger)
L11+L12 200m [656ft]
L21+L22 200m [656ft]
2) Transmission line for centralized control
L21+L31 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)
L12(L11)+L31+L22(L21) 500m [1640ft]
IC
TB5
S
TB
15
1 2
01
IC
TB5
S
TB
15
1 2
03
A B
MA
A B
MA
LC
TB5
S
07
IC
TB5
S
1 2
TB
15
IC
TB5
S
TB
15
1 2 1 2
04 02
IC
TB5 TB15
S
05
A B
MA
IC
TB5
S
TB
15
1 2
06
A B
MA
Group
Group
Group
Group
M1 M2 M1 M2 M1 M2 M1 M2
M1 M2 M1 M2
M1 M2
m2
m3
m1
m4
Interlock operation with
the ventilation unit
L12
L22
L11
L21
OC
TB3
TB7
S
51
To be connected
To be left
unconnected
To be left
unconnected
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
L31
Leave the male
connector on
CN41 as it is.
SW5-1 OFF
Leave the male
connector on
CN41 as it is.
SW5-1 OFF
Leave the male
connector on
CN41 as it is.
SW5-1 OFF
Leave the male
connector on
CN41 as it is.
SW5-1 OFF
Leave the male
connector on
CN41 as it is.
SW5-1 OFF
SW5-1 OFF
Move the male connector
from CN41 to CN40.
To be left
unconnected
To be left
unconnected
To be left
unconnected
m5