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BC Controller
(sub)
Hex. unit
BC Controller
(main)
52 ~ 100
5
Auxiliary
units
BS
OS
BC
00
Use the address that equals the
sum of the smallest indoor unit ad-
dress out of all the indoor units that
are connected to the sub BC con-
troller and 50.
Outdoor unit a1
a. Indoor/outdoor transmission line
Connection of shielded wire:
b. Centralized control transmission line
c. M-NET remote controller wiring
The same as 1. (3)
For 2-remote controller operation:
The same as 1. (1)
Connection of shielded wire:
The same as 1. (4)
The same as 1. (4)
For a 2-remote-controller operation, connect each of the terminals M1 and M2 of the IC terminal block to the two
RC terminal blocks respectively.
Indoor unit group operation
To operate IC’s as a group, connect the M1, M2 terminals of the terminal block on the main IC in the group with
the RC terminal block (with non-polar two wires)
❉
M-NET remote controller can be connected at any point on the indoor/outdoor transmission line.
❉
To run a group operation of indoor units that have different functions, select the unit with the greatest number
of functions as the main unit.
The same as 1. (4)
For indoor unit group operation:
d. LOSSNAY connection
M-NET remote controller wiring
Connect each of the M1 and M2 terminals of TB5 (indoor/outdoor transmission line terminal block) on the IC to
the terminals on the M-NET remote controller.
e. Switch setting
Address setting is required as follows.
1
Indoor unit
2
LOSSNAY
3
M-NET
remote
controller
4
Outdoor unit
Main unit
Sub unit
Main unit
Sub unit
IC
OC
LC
RC
RC
01 ~ 50
01 ~ 50
51 ~ 100
101 ~ 150
151 ~ 200
Order
Unit or controller
Address
Setting method
Caution
Factory
setting range
setting
00
00
101
00
Starting with the number main unit
a1, assign a sequential
number to each of the rest of the
indoor units.
After all indoor units have received
an address, use any remaining
number and assign it to the Lossnay
unit. units.
The smallest indoor unit address in
the same refrigerant 50
The address of the main unit in the
same group +100
The address of the main unit in the
same group +150
• Assign the smallest address within
the group to the indoor unit to
become the main unit.
• Assign a larger address to the
indoor unit that is connected to the
R2-type sub BC controller than the
one assigned to the indoor unit
connected to the main BC
controller.
• If applicable, set the sub BC con-
trollers in an R2 system in the fol-
lowing order:
(1) Indoor unit to be connected to
the main BC controller
(2) Indoor unit to be connected to
No.1 sub BC controller
(3) Indoor unit to be connected to
No.2 sub BC controller
Set the address so that (1) < (2) < (3)
• Make the initial setting of the
indoor unit group setting with
the system controller
(MELANS).
• Branch numbers must be set
for a system with R2.
• The Lossnay address must not
overlap with the indoor unit
address.
• 100’s digit does not need to be
set.
• Set the address to “ 00 ” when
setting it to “ 200 ”.
• Set the address to “ 50 ” when
setting it to “ 100 ”.
Wiring method
•
Address setting method
• To set the address to “100,” set
it to “50”.
• If the address of the heat ex-
changer unit or main BC con-
troller overlaps with the ad-
dress of the outdoor unit or the
sub BC controller, use an un-
used address within the set-
ting range.
• The use of a sub BC controller
requires a main BC controller.
