! CAUTION
• Wrap the accessory packing around the wires, and plug the wiring
connection hole with the seal material to protect the product from any
condensate water or insects.
• Tightly secure the wires with the cord clamp inside the indoor unit.
• Lead the wires through the knockout hole in the side cover when
using conduit.
• Secure the cable of the remote control switch using the cord clamp
inside the electrical box.
? NOTE
The procedure of the wiring work shall be performed according to this
manual and Installation and Operation Manual of the outdoor unit.
15.1 GENERAL CHECK
1 Make sure that the eld-selected electrical components (main
power switches, circuit breakers, wires, conduit connectors
and wire terminals) have been properly selected according to
the electrical data given in “Technical Catalog”. Make sure that
the components comply with National Electrical Code (NEC).
2 Use the shielded twist pair cable for the control cable between
the outdoor unit and the indoor unit, the control cable between
indoor units and the remote control switch cable.
3 Check to ensure that the power supply voltage is within
±10% of the rated voltage.
4 Check the capacity of the electrical wires. If the power
source capacity is too low, the system cannot be started due
to the voltage drop.
5 Check to ensure that the earth wire is connected.
15.2 ELECTRICAL WIRING CAPACITY
15.2.1 Field minimum wire sizes for power source
• Do not operate the system until all the check points have
been cleared.
a. Check to ensure that the electrical resistance is more
than 1 megohm, by measuring the resistance between
ground and the terminal of the electrical parts. If not,
do not operate the system until the electrical leakage is
found and repaired. Check to ensure that the stop valves
of the outdoor unit are fully opened, and then start the
system.
b. Check to ensure that the switch on the main power
source has been ON for more than 12 hours, to warm the
compressor oil by the crankcase heater.
• Do not touch any of the parts by hand at the discharge gas
side, since the compressor chamber and the pipes at the
discharge side are heated higher than 90ºC.
Model
Power
source
Maximum
current -
operation
(A)
Power
source
cable size
Transmitting
cable size
EN 60335-
1 *1
EN 60335-
1 *1
RPC-1.5FSR
1~ 230V
50Hz
0.7
0.75 mm
2
0.75 mm
2
RPC-2.0FSR 0.7
RPC-2.5FSR 0.9
RPC-3.0FSR 0.9
RPC-4.0FSR 2.4
RPC-5.0FSR 2.4
RPC-6.0FSR 2.4
? NOTE
• Follow local codes and regulations when selecting eld wires.
• The wire sizes marked with *1 in the above table are selected at the
maximum current of the unit according to the European Standard,
EN 60335-1. Use the wires which are not lighter than the ordinary
tough rubber sheathed exible cord (code designation 60245 IEC 57)
or ordinary polychloroprene sheathed exible cord (code designation
60245 IEC 57).
• Use a shielded cable for the transmitting circuit and connect it to
ground.
• In the case that power cables are connected in series, add each unit
maximum current and select wires below.
Selection according to EN 60335-1
Current i (A) Wire size (mm
2
)
i < 6 0.75
6 < i < 10 1
10 < i < 16 1.5
16 < i < 25 2.5
25 < i < 32 4
32 < i < 40 6
40 < i < 63 10
63 < i
In the case that current exceeds
63 A, do not connect cables in
series.
ELECTRICAL WIRING
PMML0551 rev.4 - 07/2023 - A10762310A
23
EN
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