Electrical Settings; Outdoor And Indoor Unit Electrical Wiring - Hitachi UTOPIA RAS-4HVRP2E Service Manual

4 Electrical and control settings

Electrical settings

4 When routing out cable, make sure that it does not obstruct mounting of the outdoor service cover.
Wiring Method
Keep a distance between each wiring
terminal and attach insulation tape or
sleeve as shown in the figure.
Tape or sleeve
Control cable
RAS-(4-6)HV(R/N)(C/P)2E: 1~ 230V 50Hz
Screw (M5)
Screw (M4)
Earth terminal
Power
source
wiring
Communication
wiring
Earth wire
4.3 Electrical settings

4.3.1 Outdoor and indoor unit electrical wiring

• Ensure proper connection of the electrical wires (indoor unit and the outdoor unit) as show in the figure.
• 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.
• 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 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.
• All field wiring and equipment must comply with local and international codes.
!
C A U T I O N
Take care with the connection of the operating line. Incorrect connection may cause a failure of the PCB.
70 SMGB0136 rev.0 - 07/2021
Rear cover
Earth screw
Earth wire
Power supply cable
Ring core Yellow
Wind the wire 3 times
and fix with tie
Ring core Green
Wind the wire 4 times
and fix with tie
Wiring method with clamp
Insert the wires into the cord clamp and
clamp them as shown in the figure.
Perform wiring so that wires do not touch
the compressor, refrigerant pipes or edge
of the covers.
Make a loop of wires so that disconnecting the
wirings for replacing the parts is not required.
Fasten the wires so that wires do not touch the high
temperature compressor and the other parts.
?
N O T E
Insert the power source cables L1 and N (for 1~ 230V 50Hz ) into
the yellow ring core, coiling them with 3 turns and fix the cables us-
ing the cable tie (accessory). As shown in next figure, do not insert
the cables from different sides into the ring core.
Insert the ground cable into the green ring core, coiling them with 4
turns and fix the cables using the cable tie.
R S T 3 MP
N