Hitachi RCIM-1.0FSN2 - ELECTRICAL WIRING BETWEEN INDOOR UNIT AND OUTDOOR UNIT

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INSTALLATION AND OPERATION MANUAL
13.3.1. 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.
− 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 eld-wiring is not used, x rubber
bushes with adhesive on the panel.
− All the eld wiring and equipment must comply with local and
international codes.
 ATTENTION:
Pay attention to the connection of the operating line. Incorrect
connection may cause the failure of PCB.
Indoor unit power supply from outdoor unit Power supply of outdoor unit and indoor unit separately
No. 0 System
Outdoor unit
No. 0 System
Outdoor unit
Operating Line (Twisted Shielded Pair
Cable or Shielded Pair Cable)
DC5V (Non-Pole Transmission,
H-LINK System)
Remote
Control
Switch
(Max. 3 Units per Refrigerant Cycle)
(Max. 3 Units per Refrigerant Cycle)
Operating Line (Twisted
Shielded Pair Cable or
Shielded Pair Cable)
DC5V (Non-Pole
Transmission,
H-LINK System)
Remote
Control
Switch
Indoor Unit
Indoor Unit
Indoor Unit Indoor Unit
Terminal board
Circuit Breaker
Earthleakage Breaker
Field Wiring
Field supplied
Optional Accessory
13.3.2. WIRE SIZE
 Recomended minimum sizes for eld provided wires:
Model Power Source Max. Current
Power Source Cable Size Transmitting Cable Size
EN60 335-1

MLFC

EN60 335-1

MLFC

All Indoor Units 1~ 230V 50Hz 5A 0.75 mm² 0.5 mm²
0.75 mm² 0.5 mm²
RAS-3HVRNME
1~ 230V 50Hz
14A 4.0 mm² 2.0 mm²
RAS-4HVRNM1E/HVRNS1E 18A/24A 4.0 mm²/6.0 mm
2
2.0 mm²
RAS-5HVRNM1E/HVRNS1E 26A 6.0 mm² 3.5 mm²
RAS-6HVRNM1E/HVRNS1E 26A 6.0 mm² 5.5 mm²
RAS-4HRNM1E
3N~ 400V 50Hz
7A 2.5 mm² 2.0 mm²
RAS-5HRNM1E 11A 2.5 mm² 2.0 mm²
RAS-6HRNM1E 13A 4.0 mm² 2.0 mm²
- The above wire sizes marked with  are selected at the maximum current of the unit according to the European Standard, EN60 335-1.
- The above wire sizes marked with  are selected at the maximum current of the unit according to the wire, MLFC (Flame Retardant Polyex
Wire) manufactured by HITACHI Cable Ltd. Japan.
PMML0197_r0_04-10.indb 34 08/07/2010 9:20:56