Hitachi RAS-4FSNME1 Instruction Manual page 24

ELECTRICAL WIRING
11.2 CONNECTION OF THE POWER SUPPLY CIRCUITS
Supply the power sources to each outdoor unit and indoor unit respectively. Power source wiring is fundamentally according to this
method (as example).
11.2.1 Power source wiring

Heat pump system
Power source from the outdoor unit to the indoor unit
4
1
2
3
6
1 ELB (Earth leakage breaker)
CB (Circuit breaker)
2
3 S (Main switch)
Outdoor unit
4
4
1
5
2
3
1
2
3
1 ELB (Earth leakage breaker)
2 CB (Circuit breaker)
3 S (Main switch)
4 Outdoor unit
5 Operation wiring (O.U
6 Distribution box (field-supplied)
24 PMML0532 rev.1 - 12/2020
5
7
6
8
8
5 Operation wiring (O.U
~
Indoor unit
6
7 Remote control wire (I.U)
Remote control (I.U)
8
10
4
6
7 7
8
9
I.U )
~
Independent power source of outdoor unit and indoor unit
1
2
3
7
1 ELB (Earth leakage breaker)
I.U )
2 CB (Circuit breaker)
3 S (Main switch)
Outdoor unit
4
5 Operation wiring (O.U

Heat recovery system
10
4
4
6 6
7
8
8
9
9
11
7 Indoor unit
8 Remote control wire (I.U)
9 Remote control (I.U)
10 CH-Box single
11 Indoor unit system number 0
12 Indoor unit system number 1
4
5
6
1
2
3
7
8
9
6 Distribution box (field-supplied)
7 Indoor unit
8 Remote control wire (I.U)
Remote control (I.U)
9
I.U )
~
10
7 7
8
9
6
7
8
9
8
9
12
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