8 Finishing the outdoor unit installation
Installation manual
11
RXA-A9, RXM-R9, ARXM-R9
R32 Split system air conditioners
3P650253-1S – 2022.11
7.1
Specifications of standard wiring
components
NOTICE
We recommend using solid (single-core) wires. If stranded
wires are used, slightly twist the strands to consolidate the
end of the conductor for either direct use in the terminal
clamp or insertion in a round crimp-style terminal. Details
are described in "Guidelines when connecting the electrical
wiring" in the installer reference guide.
Component
Power supply cable Voltage
220~240 V
Current
RXA20: 9.88 A
RXA25: 11.17 A
RXA35: 12.29 A
RXM20: 8.84 A
ARXM25 / RXM25: 9.63 A
ARXM35 / RXM35: 9.70 A
Phase
1~
Frequency
50 Hz
Wire sizes
MUST comply with national
wiring regulation
3-core cable
Wire size based on the
current, but not less than
2.5 mm
2
Interconnection
cable
(indoor↔outdoor)
Voltage
220~240 V
Wire size
Only use harmonised wire
providing double insulation
and suitable for applicable
voltage
4-core cable
Minimum 1.5 mm
2
Recommended circuit breaker
Class 20: 10 A
Class 25+35: 13 A
Earth leakage circuit breaker / residual
current circuit breaker
MUST comply with national
wiring regulation
7.2
To connect the electrical wiring to
the outdoor unit
1
Remove the service cover.
2
Open the wire clamp.
3
Connect the interconnection cable and power supply as follows:
f
50 Hz
220-240 V
a
b
c
d
e
a
Interconnection cable
b
Power supply cable
c
Circuit breaker
d
Residual current device
e
Power supply
f
Earth
3×
4
Tighten the terminal screws securely. We recommend using a
Phillips screwdriver.
5
Install the service cover.
8
Finishing the outdoor unit
installation
8.1
To finish the outdoor unit
installation
DANGER: RISK OF ELECTROCUTION
▪ Make sure that the system is earthed properly.
▪ Turn OFF the power supply before servicing.
▪ Install the switch box cover before turning ON the
power supply.
1
Insulate and fix the refrigerant piping and cables as follows:
g
b
a
f
e
c
d
a
Gas pipe
b
Gas pipe insulation
c
Interconnection cable
d
Field wiring (if applicable)
e
Liquid pipe
f
Liquid pipe insulation
g
Finishing tape
2
Install the service cover.
9
Configuration
9.1
Facility setting
Use this function for cooling at low outdoor temperature. This
function is designed for facilities such as equipment of computer
rooms. NEVER use in a residence or office where people occupy the
space.
Applicable for: RXM-R9, ARXM-R9, RXA-A9
9.1.1
To set the facility mode
When cutting jumper J6 on the PCB, the operation range will expand
to –15°C. The facility mode will stop if the outdoor temperature drops
below –20°C and resume when the temperature rises again.
To cut jumper J6
1
Remove the top plate of the outdoor unit.
Summary of Contents for RXA20A5V1B9
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