Hitachi UTOPIA ES Serie Bedienungsanleitung Seite 25

ELECTRICAL WIRING
10.3 COMMON WIRING
!
C A U T I O N
All the field wiring and electrical components must comply with local codes.
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.
• 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).
• 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.
Power source from the outdoor unit to the indoor unit
Nº 0 System
Outdoor unit
Indoor Unit
Terminal board
Circuit Breaker
Earthleakage Breaker
Field Wiring
Field supplied
Optional Accessory
15 PMML0396B rev.0 - 11/2015
Operating Line (Twisted
Shielded Pair Cable or
Shielded Pair Cable)
DC5V (Non-Pole
Transmission)
Indoor Unit
Remote
Control
Switch
Max. 3 Units per Refrigerant Cycle
• 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 shown in Table of
electrical data and recommended Wiring, Breaker Size/1
O.U.
• 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
Operating Line
(Twisted Shielded Pair
Cable or Shielded Pair
Cable)
DC5V (Non-Pole
Transmission)
Indoor Unit Indoor Unit
Remote
Control
Switch
Max. 3 Units per Refrigerant Cycle