7 Electrical installation
Installation manual
11
RXA-A8
R32 Split system air conditioners
3P748894-1A – 2023.09
7
Electrical installation
DANGER: RISK OF ELECTROCUTION
WARNING
▪ All wiring MUST be performed by an authorised
electrician and MUST comply with the national wiring
regulation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on-site and all electrical
construction MUST comply with the applicable
legislation.
WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
Use an all-pole disconnection type breaker with at least
3 mm between the contact point gaps that provides full
disconnection under overvoltage category III.
WARNING
If the supply cord is damaged, it MUST be replaced by the
manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
WARNING
Do NOT connect the power supply to the indoor unit. This
could result in electrical shock or fire.
WARNING
▪ Do NOT use locally purchased electrical parts inside
the product.
▪ Do NOT branch the power supply for the drain pump,
etc. from the terminal block. This could result in
electrical shock or fire.
WARNING
Keep the interconnection wiring away from copper pipes
without thermal insulation as such pipes will be very hot.
DANGER: RISK OF ELECTROCUTION
All electrical parts (including thermistors) are powered by
the power supply. Do NOT touch them with bare hands.
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.
Power supply
Voltage
220~240 V
Frequency
50 Hz
Phase
1~
Current
RXA20: 9.88 A
RXA25: 11.17 A
RXA35: 12.29 A
Components
Power supply cable
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)
Only use harmonised wire providing
double insulation and suitable for
applicable voltage
4-core cable
Minimum size 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 (field provided fuse with 16 A rating)
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.
