Hitachi UTOPIA IVX PREMIUM-Serie Bedienungsanleitung Seite 23

ELECTRIC WIRING

DSW4 / RSW1: Refrigerant cycle number setting
(Setting is required)
Setting for the ten digit
Setting position.
Set by inserting slotted screwdriver into the
groove (setting for the last digit)

DSW5: End terminal resistance (No setting is
required)
Setting before shipment
10.3 COMMON WIRING
10.3.1 Electrical wiring between indoor unit and outdoor unit
• Connect the electrical wires between the indoor unit and the
outdoor unit, as shown below.
• 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).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 from the outdoor IVX unit to the indoor unit
Nº 0 System
Outdoor unit
Indoor Unit
Terminal board
Circuit Breaker
Earthleakage Breaker
Field Wiring
Field supplied
Optional Accessory
13 PMML0398B rev.0 - 11/2015 - P5416651
(example)
Operating Line
(Shielded Pair Cable)
DC5V (Non-Pole Transmission,
H-LINK System)
Indoor Unit
Remote Control Switch
(Twisted Shielded Pair Cable)

DSW6: Setting of multiple indoor units
simultaneous operation (setting is required)
(IVX series only)
Optional function setting

DSW6: Not available for ES series
Factory setting
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.
• 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.
• All the field wiring and electrical components must comply with local
codes.
Independent power source of outdoor IVX unit and indoor unit
(example)
Nº 0 System
Outdoor unit
For individual operation (factory
setting position) for IVX series
For simultaneous operation
Set pin number 1 at OFF for
simultaneous operation
or
Operating Line
(Twisted Shielded Pair
Cable)
DC5V (Non-Pole
Transmission, H-LINK
System)
Indoor Unit
Indoor Unit
Remote Control Switch
(Twisted Shielded Pair Cable)