4 Installation
Installation manual
9
RXA20~35A2V1B
R32 split series
3P517827-1 – 2017.12
4.5
Connecting the electrical wiring
DANGER: RISK OF ELECTROCUTION
WARNING
▪ All wiring MUST be performed by an authorised
electrician and MUST comply with the applicable
legislation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on the site and all electrical
construction MUST comply with the applicable
legislation.
WARNING
ALWAYS use multicore cable for power supply cables.
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
Disconnect the power supply for more than 10 minutes,
and measure the voltage at the terminals of main circuit
capacitors or electrical components before servicing. The
voltage MUST be less than 50 V DC before you can touch
electrical components. For the location of the terminals,
see the wiring diagram.
DANGER: RISK OF ELECTROCUTION
All electrical parts (including thermistors) are powered by
the power supply. Do not touch them with bare hands.
DC-
DC+
g
h
b c d e
f
a
a
Multimeter (DC voltage range)
b
S70 – fan motor lead wire
c
LED
d
S90 – thermistor lead wire
e
S20 – electronic expansion valve lead wire
f
S80 – reversing solenoid valve lead wire
g
S40 – thermal overload relay lead wire
h
DB1 - diode bridge
4.5.1
Guidelines when connecting the electrical
wiring
Tightening torques
Item
Tightening torque (N•m)
M4 (X1M)
1.5~1.6
M4 (earth)
1.4~1.5
4.5.2
Specifications of standard wiring
components
Component
RXA
20
25+35
Power supply
cable
Voltage
220~240 V
Phase
1~
Frequency
50 Hz
Wire sizes
MUST comply with applicable
legislation
Interconnection cable
(indoor↔outdoor)
4-core cable ≥1.5 mm² and applicable
for 220~240 V
Recommended field fuse
10 A
13A
Earth leakage circuit
breaker
MUST comply with applicable
legislation
4.5.3
To connect the electrical wiring on the
outdoor unit
1
Open the wire clamp.
2
Connect the interconnection cable and power supply as follows:
50Hz
220-240V
c
d
f
a
e
b
a
Interconnection cable
b
Power supply cable
c
Field fuse
d
Earth leakage circuit breaker
e
Power supply
f
Earth
3
Tighten the terminal screws securely. We recommend using a
Phillips screwdriver.
4.6
Finishing the outdoor unit
installation
4.6.1
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 service cover before turning on the power
supply.
1
Insulate and fix the refrigerant piping and interconnection cable
as follows:
f
b
a
e
d
c
