Hitachi 3HRNM1Q, Installation & Maintenance Manual

Page: 25 / 36

6.2 Electrical Wiring Connection
(1) Connect the power supply wires to the
terminal board in the electrical control box
of both outdoor unit and indoor unit. And
connect the earth wire to the electrical
control box of outdoor unit.
In addition, connect the earth wire to earth
screw in the electrical control box of indoor
unit. Refer to Fig. 6.2-Fig.6.5
(2) Connect the wires between the outdoor
and indoor units to terminals 1 and 2 on the
terminal board.
If power supply wiring is connected to 1
and 2 of terminal board (TB1), printed
circuit board will be damaged.
CORRECT( 1N~ )
INCORRECT
Remote
Control
Switch
(Option)
Remote
Control
Switch
(Option)
ELB for
Outdoor Unit
ELB for
Indoor Unit ELB for
Indoor Unit
Remote
Control
Switch
(Option)
Remote
Control
Switch
(Option)
ELB for
Outdoor Unit
ELB for
Indoor Unit
ELB for
Indoor Unit
Indoor Unit Indoor Unit
Outdoor Unit
Indoor Unit Indoor Unit
Outdoor Unit
Do not connect the Power Source Line to the terminal 1 and 2.
These terminals are for the Control Line.
If connected, the printed circuit board will be damaged.
(3) Do not wire in front of the fixing screw of
the service panel. Otherwise, the screw can not
be removed.
NOTES:
2. Total wiring length for remote control switch
can be extended up to 500m.
If total wiring length less than 30m, it is
possible to use the normal wiring (0.3mm
2
)
except shielded twist pair.
INCORRECT
CORRECT( 3N~ )
Outdoor Unit Indoor Unit Indoor Unit
ELB for ELB for ELB for
(Option) (Option)
Remote Remote
Outdoor Unit Indoor Unit Indoor Unit
Mp Mp
E E L1 L2 L3(N) 1 2 L1 L2 N 1 2 A B L1 L2 N 1 2 A B
Outdoor Unit Indoor Unit Indoor Unit
ELB for ELB for ELB for
(Option) (Option)
Control Control
Remote Remote
Outdoor Unit Indoor Unit Indoor Unit
Mp Mp
E L1 L2 L3(N) 1 2 L1 L2 N 1 2 A B L1 L2 N 1 2 A B
In Case of 3 Phases 4 Wires Type
The power source has to be applied from L1 line
and N line. If applied from L1-L2, L1-L3, the
electrical parts will be damaged to outdoor unit
and indoor unit.
Fig. 6.1 Connector of Transformer of Outdoor Unit
PCN2 CN11
23V
CN2
CN1
TF1
Connector
0V
1 2
PCB1
1 2
(4) In case that the power source is 240V,
change CN1 (connector) to CN2 of
transformer in the electrical control box as
shown in Fig. 6.1.
source wiring of each terminal board:
AC220-240V between the indoor unit and
the outdoor unit coincide correctly. If not,
some component will be damaged.
(5) Connect the electrical wires between the
indoor unit and the outdoor unit, as shown
in Fig. 6.2, Fig. 6.3,Fig. 6.4 and Fig.6.5.
Check to ensure that the terminal for power
(6) Use shielded twist pair for
control between outdoor unit and indoor
unit, control wiring between indoor units,
1. In case of total wiring length at intermediate
wiring between outdoor unit and indoor unit
and between indoor units is less than 100m, it
is possible to use the normal wiring (more than
0.75mm
2 ) except shielded twist pair.
18
Connect the wires between the outdoor
and indoor units to terminals 1 and 2 on
the terminal board.
Control Control
Switch Switch
FUSE
Switch
FUSE
Switch
220-240V~/50HZ
220V~/60HZ
380-415V 3N ~/50HZ
380V 3N~/60HZ
220-240V~/50HZ
220V~/60HZ
220-240V~/50HZ
220V~/60HZ
220-240V~/50HZ
220V~/60HZ
220-240V~/50HZ
220V~/60HZ
220-240V~/50HZ
220V~/60HZ
220-240V~/50HZ
220V~/60HZ
220-240V~/50HZ
220V~/60HZ
220-240V~/50HZ
220V~/60HZ
220-240V~/50HZ
220V~/60HZ
380-415V 3N ~/50HZ
380V 3N~/60HZ
In Case of 3 Phases 4 Wires Type
The power source has to be applied from L1 line
and N line. If applied from L1-L2, L1-L3, the
electrical parts will be damaged to outdoor unit
and indoor unit. In Case of 3 Phases 4 Wires Type
The power source has to be applied from L1 line
and N line. If applied from L1-L2, L1-L3, the
electrical parts will be damaged to outdoor unit
and indoor unit.
In Case of 3 Phases 4 Wires Type
The power source has to be applied from L1 line
and N line. If applied from L1-L2, L1-L3, the
electrical parts will be damaged to outdoor unit
and indoor unit.