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Mitsubishi Electric PURY-P72 Service Handbook page 39

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[ II Restrictions ]
3. Group operation of units in a system with multiple outdoor units
(1) Sample control wiring
L11
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
OS
52
TB3
M1 M2
TB7
M1 M2
S
Not
Connect
L21
Leave the male
Leave the male
connector on
connector on
CN41 as it is.
CN41 as it is.
SW2-1 OFF
SW2-1 OFF
OS
56
TB3
M1 M2
TB7
M1 M2
S
Not
Connect
(2) Cautions
1) M-NET 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.
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) 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 mod-
els are not included in the
connected indoor units
When the P72 and P96 mod-
els are included in the con-
nected indoor units
HWE0803A
CN41 CN40 Replace
Group
SW2-1 OFF
OC
BC
51
53
TB5
TB3
TB02
M1 M2
M1 M2
M1 M2
S
TB7
M1 M2
S
Connect
OC
BC
55
57
TB5
TB3
TB02
M1 M2
M1 M2
M1 M2
S
TB7
M1 M2
S
Not
Connect
Number of transmission
booster (sold separately) re-
quired
1 unit
2 units
27 - 50 units
-
21 - 39 units
40 - 50 units
L12
Group
IC
IC
01
03
TB15
TB5
TB15
S
M1 M2
S
1 2
1 2
A1 B2
A1 B2
MA
MA
L22
Group
IC
IC
02
04
TB5
TB15
TB15
S
1 2
M1 M2
S
1 2
A1 B2
MA
The left table shows the number of transmission boost-
ers that is required by the system with three BC control-
lers. For each BC controller that is subtracted from the
above-mentioned system, two additional indoor units
can be connected.
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Maximum distance (1.25mm
L11+L12 200m [656ft]
L21+L22 200m [656ft]
2) Transmission line for centralized control
Maximum line distance via outdoor unit
2
(1.25mm
[AWG16] or larger)
L12+L31+L22 500m [1640ft]
L11+L31+L21 500m [1640ft]
3) MA remote controller wiring
Same as [5] 1.
- 30 -
Interlock operation with
the ventilation unit
Group
LC
IC
06
07
TB5
TB15
TB5
M1 M2
S
M1 M2
S
1 2
A1 B2
MA
IC
05
TB5
TB15
M1 M2
S
1 2
2
[AWG16] or larger)
GB
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