Hitachi RCIM-2.0FSN - 13.3. COMMON WIRING; Indoor;Outdoor Unit Wiring and Connection Precautions

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ELECTRICAL WIRING
 DSW4: Refrigerant Cycle No. Setting (Setting is
required)
Setting for the ten digit
ON
1 2 3 4 5 6
 DSW5: End Terminal Resistance (No setting is
required)
Setting before shipment
ON
1 2
 DSW6: Function setting (No setting is required)
Setting before shipment
ON
1 2
 RSW1: Ref. Cycle No. Setting (Setting is required)
Setting position.
Set by inserting slotted screwdriver
into the groove (Setting for the last
digit)
13.3. COMMON WIRING
 CAUTION:
All the field wiring and electrical components must comply with local codes.
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.
- 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.
- 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.
µ ATTENTION:
Pay attention to the connection of the operating line.
Incorrect connection may cause the failure of PCB.
RAS-2/2.5HVRN1
: Terminal Board
: Circuit Breaker
: Earthleakage Breaker
: Field Wiring
: Field Wiring
: Field-Supplied
: Optional Accessory
No.0 System
Outdoor Unit
No.0 System
Outdoor Unit
Indoor Unit
CB
ELB
Remote
Control
Switch
Operating Line (Twisted
Shielded Pair Cable or
Shielded Pair Cable)
DC5V (Non-Pole Transmission,
H-LINK System)
(Max. 1 Unit per Refrigerant Cycle)
Indoor Unit
Remote
Control
Switch
Operating Line
(Twisted Shielded
Pair Cable or
Shielded Pair Cable)
DC5V (Non-Pole
Transmission,
H-LINK System)
CB
ELB
(Max. 1 Unit per Refrigerant Cycle)