9
en
5. Electrical work
5.5. Setting addresses (Fig. 5-6)
(Be sure to operate with the main power turned OFF.)
• There are 2 types of rotary switch setting available: setting addresses 1 to 9 and
over 10, and setting branch numbers.
1
How to set addresses
Example: If Address is “3”, remain SW12 (for over 10) at “0”, and match SW11
(for 1 to 9) with “3”.
2
How to set branch numbers SW14 (Series R2 only)
Match the indoor unit’s refrigerant pipe with the BC controller’s end connection
number.
Remain other than series R2 at “0”.
• The rotary switches are all set to “0” when shipped from the factory. These switches
can be used to set unit addresses and branch numbers at will.
• The determination of indoor unit addresses varies with the system at site. Set them
referring to the Data Book.
A
Controller board
• Rotary switches (SW11, SW12 and SW14) in the picture show “0”.
Fig. 5-6
A
SW21
ON
OFF
1
ON
OFF
1
1
1
1
4
0
6
0
6
SW22
SW1
SW2
SW3
BRANCH
No.
10s
DIGIT
1s
DIGIT
SW14 SW12 SW11
5.4. Connecting remote controller, indoor and outdoor
transmission cables (Fig. 5-5)
• Connect indoor unit TB5 and outdoor unit TB3. (Non-polarized 2-wire)
The “S” on indoor unit TB5 is a shielding wire connection. For specifications about
the connecting cables, refer to the outdoor unit installation manual.
• Install a remote controller following the manual supplied with the remote controller.
• Connect the remote controller’s transmission cable within 10 m using a 0.75 mm
2
core cable. If the distance is more than 10 m, use a 1.25 mm
2
junction cable.
1
MA Remote controller
• Connect the “1” and “2” on indoor unit TB15 to a MA remote controller. (Non-polarized
2-wire)
• DC 9 to 13 V between 1 and 2 (MA remote controller)
2
M-NET Remote controller
• Connect the “M1” and “M2” on indoor unit TB5 to a M-NET remote controller. (Non-
polarized 2-wire)
• DC 24 to 30 V between M1 and M2 (M-NET remote controller)
3
Wireless remote controller (When installing wireless signal receiver)
• Connect the wire of wireless signal receiver (9-pole cable) to CN90 of indoor con
-
troller board.
• When more than two units are run under group control using wireless remote
controller, connect TB15 each with the same number.
• To change Pair No. setting, refer to installation manual attached to wireless remote
controller. (In initial setting of indoor unit and wireless remote controller, Pair No.
is 0.)
A
Terminal block for indoor transmission cable
B
Terminal block for outdoor transmission cable (M1(A), M2(B),
(S))
C
Remote controller
D
wireless signal receiver
E
wireless remote controller
Fig. 5-5
TB5
TB15 TB5
TB15
S
M1M2
S
M1M2
TB3
M1M2
2
1
2
1
TB5
TB5
S
M1M2
S
M1M2
TB3
M1M2
1
B
A
A
B
A
A
C
C
C
C
2
3
B
A
E
D
5.3. Types of control cables
1. Wiring transmission cables
Types of transmission cable
Shielding wire CVVS or CPEVS
Cable diameter
More than 1.25 mm²
Length
Less than 200 m
2. M-NET Remote control cables
Types of remote control cable Shielding wire MVVS
Cable diameter
0.5 to 1.25 mm²
Length
Add any portion in excess of 10 m to within the
longest allowable transmission cable length 200 m
3. MA Remote control cables
Types of remote control cable
2-core cable (unshielded)
Cable diameter
0.3 to 1.25 mm²
Length
Less than 200 m
Pair No.
Pair No.
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