Hitachi RAS-5FSNY2E [132/148] Common wiring

Hitachi RAS-5FSNY2E [132/148] Common wiring
10 Electrical wiring
124
TCGB0068 rev.1 - 08/2012
10.3 Common wiring
10.3.1 Electrical wiring between outdoor and indoor unit
Connect the electrical wires between the indoor unit and the outdoor unit as show in the gure.
When installing the electrical wiring, follow local codes and regulations.
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 mm
2
) for operation wiring between the outdoor unit and indoor unit, and operation
wiring between indoor unit and indoor unit.
Use a 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 interference at lengths of less than 300 m.
The size must comply with local code.
Open a hole near the connection hole of power source wiring when multiple outdoor units are connected from a single
power source line.
The recommended circuit-breaker sizes are shown in the table of electrical data and recommended wiring and breaker
sizes / 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 eld wiring and equipment must comply with local and international codes.
H-LINK twist pair shielded cable must be grounded in the outdoor unit side.
N O T E
Take care with the connection of the operating line. Incorrect connection may cause a failure of the PCB.
Outdoor unit of
system no. 0
Outdoor unit of
system no. 0
Operating line (twisted shielded
pair cable or shielded pair cable)
DC5V (non-pole transmission,
H-LINK system)
Remote
control
switch
Operating line (twisted shiel-
ded 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
Earth leakage breaker
Field wiring
Field-supplied
Optional accessory
Power source from the outdoor
unit to the indoor unit
Independent power source of outdoor
unit and indoor unit

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