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10.3. Electrical wiring
10.3.1 Wiring method
■ 2-branch merging
Transmission
OUT/RB
Power
IN/U
supply
L N
Breaker
L N
Power supply
Transmission
230V 1Φ 50Hz
Indoor unit
■ 4-branch merging
Transmission
OUT/RB
Power
supply
IN/U
L N
Breaker
L N
Power supply
Transmission
230V 1Φ 50Hz
Indoor unit
■ When merging 2 branches
(1) Connect the transmission cable according to the table information.
(2) Set up the DIP switch S300 according to the table information.
• Only the types of branch combinations that are listed in the table can be merged.
(For example, branches B and C cannot be merged with each other).
Branches that
PC board
can be merged
Branches A and B *1
For
Branches C and D *2
branches
Branches A and B
A-D
Branches C and D
Branches E and F *1
For
Branches G and H *2
branches
Branches E and F
E-H
Branches G and H
Branches I and J *1
For
Branches K and L *2
branches
I-L
Branches I and J
Branches K and L
En-13
Outdoor unit
RB unit
IN/U
IN/U
IN/U
Transmission
Indoor unit
Outdoor unit
RB unit
IN/U
IN/U
IN/U
DIP Switch S300 "CON-
Cable-
CURRENT OUTPUT"
connecting
terminal
1 [4-3]
2 [3-2]
3 [2-1]
block
OFF
OFF
ON
For branch B
ON
OFF
OFF
For branch D
For branch B
*3
ON
OFF
ON
For branch D
OFF
OFF
ON
For branch F
ON
OFF
OFF
For branch H
For branch F
*3
ON
OFF
ON
For branch H
OFF
OFF
ON
For branch J
ON
OFF
OFF
For branch L
For branch J
ON
OFF
ON
*3
For branch L
*1) Connection type 1
Branch
Branch
D or H or L
C or G or K
Indoor unit
Indoor unit
*2) Connection type 2
Branch
Branch
D or H or L
C or G or K
Indoor unit
*3) Connection type 3
Branch
Branch
D or H or L
C or G or K
Indoor unit
Example) To merge branches A and B or branches C and D
■ When merging 4 branches:
(1) Connect the transmission cable according to the table information.
(2) Set up the DIP S300 according to the table information.
• Only the types of branch combinations that are listed in the table can be merged.
(For example, branches B, C, D and E cannot be merged together).
Branches that
PC board
can be merged
For
branches
Branches A to D
A to D
For
branches
Branches E to H
E to H
For
branches
Branches I to L
I to L
Example) To merge branches A, B, C and D together
RB unit
Branch
Branch
B or F or J
A or E or I
Indoor unit
RB unit
Branch
Branch
B or F or J
A or E or I
Indoor unit
Indoor unit
RB unit
Branch
Branch
B or F or J
A or E or I
Indoor unit
DIP switch S300
DIP switch
S300
Cable tie
When branches A and B are
merged, use the branch B terminal.
(Do not connect to the branch A
terminal).
Cable tie
When branches C and D are
merged, use the branch D terminal.
(Do not connect to the branch C
terminal).
DIP Switch S300 "CON-
Cable-
CURRENT OUTPUT"
connecting
terminal
1 [4-3]
2 [3-2]
3 [2-1]
block
ON
ON
ON
For branch D
ON
ON
ON
For branch H
ON
ON
ON
For branch L
DIP switch S300
DIP switch
S300
Cable tie
When branches A, B, C and D are
merged, use the branch D terminal.
(Do not use the terminals for A, B
and C).
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