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[ II Restrictions ]
41- 41 -
HWE09080 GB
8. Group operation of units in a system with multiple heat source units <PQRY>
(1) Sample control wiring
(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 heat source units
with each other.
4) Replacement of male power jumper connector (CN41)
must be performed only on one of the heat source units.
5) Provide grounding to S terminal on the terminal block for
transmission line for centralized control (TB7) on only
one of the heat source 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
heat source unit.)
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-heat source transmission line
Maximum distance (1.25mm
2
[AWG16] or larger)
L11+L12 200m [656ft]
L21+L22 200m [656ft]
2) Transmission line for centralized control
L31+L21 200m [656ft]
3) MA remote controller wiring
Same as [5] 6.
4) Maximum line distance via heat source unit
(1.25mm
2
[AWG16] or larger)
L12+L31+L22 500m [1640ft]
L11+L31+L21 500m [1640ft]
IC
TB5
S
TB
15
12
01
IC
TB5
S
TB
15
12
03
A1 B2
MA
A1 B2
MA
LC
TB5
S
07
IC
TB5
S
12
TB
15
IC
TB5
S
TB
15
12 12
0402
IC
TB5 TB15
S
05
A1 B2
MA
Group
IC
TB5
S
TB
15
12
06
A1 B2
MA
GroupGroup
Group
To be left
unconnected
m2
m3
Interlock operation with
the ventilation unit
L12
L22
L11
L21
OC
Move the male connector
from CN41 to CN40.
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
TB3
TB7
S
51
OS
TB3
TB7
M1 M2
M1 M2
M1 M2
M1 M2
M1 M2
M1M2 M1M2
M1M2
M1M2
M1M2
M1M2
M1M2
M1 M2M1 M2
M1 M2
M1 M2
M1 M2
S
52
OC
TB3
TB7
S
55
OS
TB3
TB7
S
56
L31
To be left
unconnected
S
S
BC
TB02
53
BC
TB02
57
To be left
unconnected
To be connected
Number of transmission boost-
er (sold separately) required
1 unit 2 units
When the P72 and P96 mod-
els are not included in the con-
nected indoor units
27 - 50 units -
When the P72 or P96 model is
included in the connected in-
door units
21 - 39 units 40 - 50 units