Hitachi UTOPIA IVX RAS-12HNC Manuel D'utilisation page 31

ELECTRIC WIRING
10.3 COMMON WIRING
!
C A U T I O N
All the field wiring and electrical components must comply with local
codes.
1 0 .3 .1 Ele c t ric a l w iring be t w e e n indoor unit
a nd out door unit
• Connect the electrical wires between the indoor unit and the
outdoor unit, as shown below.
• Follow local codes and regulations when performing
electrical wiring.
• If the refrigerant piping and the control wiring are connected
to the units in the same refrigerant cycle.
• Use twist pair wire (more than 0.75 mm²) for operation wiring
between outdoor unit and indoor unit, and operation wiring
between indoor unit and indoor unit.
• Use 2-core wire for the operating line (Do not use wire with
more than 3 cores).
Power source from the outdoor unit to the indoor unit
Nº 0 System
L1 L2 L3 L1 L2 L3 N N
Outdoor unit
3
Indoor Unit
Terminal board
Circuit Breaker
Earth leakage Breaker
Field Wiring
Field supplied
Optional Accessory
Wiring ex a m ple
Basic combinations (in case of twin combination)
Operating line
Remote control line
Individual control
Running ON/OFF individually
Thermo-ON/OFF individually
15
PMML0397B rev.3 - 01/2020 - P5416650
Operating Line
(Shielded Pair Cable)
DC5V (Non-Pole
Transmission,
H-LINK System)
Indoor Unit
Remote Control Switch
(Twisted Shielded Pair Cable)
Operating line
Remote control line
DSW6
ON
1 2
Individual control
Running ON/OFF simultaneously
Thermo-ON/OFF individually
• Use shielded wires for intermediate wiring to protect the
units from noise obstacle at length of less than 300 m and
size complied with local code.
• Open a hole near the connection hole of power source
wiring when multiple outdoor units are connected from one
power source line.
• The recommended breaker sizes are detailed in the Wire
size section.
• In the case that a conduit tube for field-wiring is not used, fix
rubber bushes with adhesive on the panel.
• All the field wiring and equipment must comply with local and
international codes.
• H-LINK twist pair shielded cable must be grounded in the
outdoor unit side.
!
C A U T I O N
Pay attention to the connection of the operating line. Incorrect connection
may cause the failure of PCB.
Independent power source of outdoor unit and indoor unit
Nº 0 System
Outdoor unit
L1 L2 L3 N
3
3
Operating line
Remote control line
DSW6
ON
1 2
Simultaneous control
Running ON/OFF simultaneously
Thermo-ON/OFF simultaneously
Operating Line
(Twisted Shielded
Pair Cable)
DC5V (Non-Pole
Transmission,
H-LINK System)
Indoor Unit
Indoor Unit
Remote Control Switch
(Twisted Shielded Pair Cable)
DSW6
ON
1 2