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[2-7 Example System with an MA Remote Controller ]
2-7-3
Grouped Operation of Units in Separate Refrigerant Circuits
(1) Sample control wiring
Leave the male
connector on
CN41 as it is.
SW5-1 OFF
OS
52
TB3
M1 M2
TB7
M1 M2
S
Leave the male
connector on
CN41 as it is.
SW5-1 OFF
OS
56
TB3
M1 M2
TB7
M1 M2
S
(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) 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 par-
allel. (Observe the maximum number of connectable indoor
units that are listed in the specifications for each outdoor
unit.)
When the P200 and P250 models are
not included in the connected indoor
units
When the P200 and P250 models are
included in the connected indoor units
The left table shows the number of transmission boost-
HWE1314A
L11
Move the male connector
from CN41 to CN40.
SW5-1 OFF
OC
BC
51
53
TB3
TB02
M1 M2
M1 M2
S
TB7
M1 M2
S
To be left
unconnected
To be connected
L21
Leave the male
connector on
CN41 as it is.
SW5-1 OFF
OC
BC
55
57
TB3
TB02
M1 M2
M1 M2
S
TB7
M1 M2
S
To be left
To be left
unconnected
unconnected
Number of transmission boost-
er (sold separately) required
1 unit
2 units
27 - 50 units
21 - 39 units
40 - 50 units
L12
Group
Group
IC
01
03
TB5
TB15
TB5
S
S
M1 M2
1 2
M1 M2
A1 B2
MA
L22
Group
IC
02
TB5
TB5
TB15
M1 M2
S
1 2
M1 M2
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.
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]
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
(1.25mm
L12(L11)+L31+L22(L21) 500m [1640ft]
-
- 38 -
Interlock operation with
the ventilation unit
Group
IC
IC
06
TB15
TB5
TB15
TB5
1 2
M1 M2
S
1 2
M1 M2
A1 B2
A1 B2
MA
MA
IC
IC
04
05
TB15
TB5
TB15
M1 M2
S
S
1 2
1 2
A1 B2
MA
m5
2
[AWG16] or larger)
2
[AWG16] or larger)
LC
07
S
GB
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