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8. Electrical work
Supply power (1-phase) separately to branch box and outdoor
unit
Circuit breaker
~
Outdoor unit
Circuit breaker
L
~
B1
N
B2
M1
M2
Supply power (1-phase) separately to branch box and outdoor
unit
When installing the unit in a regular house. (Refer to Note 8)
Circuit breaker
~
E
Outdoor unit
Circuit breaker
L
~
B1
N
B2
M1
M2
10
M-NET Branch BOX #1
(5-branches type)
Indoor unit
(C)
TB3A
(A)
TB2B
S1
S1
L
S2
S2
N
S3
S3
TB3B
(C)
S1
S1
TB5
S2
S2
M1
S3
S3
M2
S
(C)
TB3C
(B)
S1
S1
indoor
S2
S2
unit C
S3
S3
(C)
TB3
S1
S1
indoor
S2
S2
unit D
S3
S3
(C)
TB3
S1
S1
S2
S2
S3
S3
(C)
(A)
TB3A
TB2B
S1
S1
L
S2
S2
N
S3
S3
(C)
TB3B
TB5
S1
S1
M1
S2
S2
M2
S3
S3
S
(C)
TB3C
(B)
S1
S1
indoor
S2
S2
unit C
S3
S3
Indoor unit
M-NET Branch BOX #2
(3-branches type)
M-NET Branch BOX #1
(5-branches type)
Indoor unit
Reactor Box
(C)
(A)
(Optional parts)
TB3A
(A)
TB2B
S1
S1
L
L
L
S2
S2
N
N
N
S3
S3
TB3B
(C)
S1
S1
TB5
S2
S2
M1
S3
S3
M2
S
(C)
TB3C
(B)
S1
S1
indoor
S2
S2
unit C
S3
S3
(C)
TB3
D
S1
S1
indoor
S2
S2
unit D
S3
S3
(C)
TB3 E
S1
S1
S2
S2
S3
S3
Reactor Box
(A)
(C)
(Optional parts)
(A)
TB3A
TB2B
S1
S1
L
L
L
S2
S2
N
N
N
S3
S3
(C)
TB3B
TB5
S1
S1
M1
S2
S2
S3
S3
M2
S
(C)
TB3C
(B)
S1
S1
indoor
S2
S2
unit C
S3
S3
Indoor unit
M-NET Branch BOX #2
(3-branches type)
8.2. External wiring procedure (Fig. 8-8)
Power supply (1-phase) from Outdoor unit
* Refer to installation manual of the outdoor unit
Outdoor unit
Circuit breaker
L
~
N
indoor
unit A
indoor
unit B
indoor
unit E
indoor
unit A
indoor
unit B
Power supply (3-phase) from Outdoor unit
When installing the unit in a regular house. (Refer to Note 8)
* Refer to installation manual of the outdoor unit
Outdoor unit
Circuit breaker
L1
L2
~
L3
indoor
unit A
N
indoor
unit B
indoor
unit E
indoor
unit A
indoor
unit B
Fig. 8-8
M-NET Branch BOX #1
(5-branches type)
TB3A
TB2B
(A)
L
B1
N
B2
TB3B
TB5
M1
M1
M2
M2
S
TB3C
(B)
TB3D
TB3E
(A)
TB3A
TB2B
L
N
TB3B
TB5
M1
M2
S
TB3C
(B)
M-NET Branch BOX #2
(3-branches type)
M-NET Branch BOX #1
(5-branches type)
Reactor Box
(Optional parts)
TB3A
TB2B
(A)
(A)
L
B1
L
L
N
B2
N
N
TB3B
TB5
M1
M1
M2
M2
S
TB3C
(B)
TB3D
TB3E
(A)
TB3A
TB2B
L
N
TB3B
TB5
M1
M2
S
TB3C
(B)
M-NET Branch BOX #2
(3-branches type)
Indoor unit
(C)
S1
S1
indoor
S2
S2
unit A
S3
S3
(C)
S1
S1
indoor
S2
S2
unit B
S3
S3
(C)
S1
S1
indoor
S2
S2
unit C
S3
S3
(C)
S1
S1
indoor
S2
S2
unit D
S3
S3
(C)
S1
S1
indoor
S2
S2
unit E
S3
S3
(C)
S1
S1
indoor
S2
S2
unit A
S3
S3
(C)
S1
S1
indoor
S2
S2
unit B
S3
S3
(C)
S1
S1
indoor
S2
S2
unit C
S3
S3
Indoor unit
Indoor unit
(C)
S1
S1
indoor
S2
S2
unit A
S3
S3
(C)
S1
S1
indoor
S2
S2
unit B
S3
S3
(C)
S1
S1
indoor
S2
S2
unit C
S3
S3
(C)
S1
S1
indoor
S2
S2
unit D
S3
S3
(C)
S1
S1
indoor
S2
S2
unit E
S3
S3
(C)
S1
S1
indoor
S2
S2
unit A
S3
S3
(C)
S1
S1
indoor
S2
S2
unit B
S3
S3
(C)
S1
S1
indoor
S2
S2
unit C
S3
S3
Indoor unit
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