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14 Electrical installation
13.2.1
To connect the refrigerant piping to the
indoor unit
CAUTION
Install the refrigerant piping or components in a position
where they are unlikely to be exposed to any substance
which may corrode components containing refrigerant,
unless the components are constructed of materials that
are inherently resistant to corrosion or are suitably
protected against corrosion.
▪ Pipe length. Keep refrigerant piping as short as possible.
▪ Flare connections. Connect refrigerant piping to the unit using
flare connections.
▪ Insulation. Insulate the refrigerant piping on the indoor unit as
follows:
A
a
b
c
1
3
A
B
A
Gas piping
B
Liquid piping
a
Insulation material (field supply)
b
Tie wrap (accessory)
c
Insulation pieces: Large (gas pipe), small (liquid pipe)
(accessories)
d
Flare nut (attached to the unit)
e
Refrigerant pipe connection (attached to the unit)
f
Unit
g
Sealing pads: Medium (gas pipe), Small (liquid pipe)
(accessories)
1
Turn up the seams of the insulation pieces.
2
Attach to the base of the unit.
3
Tighten the tie wrap on the insulation pieces.
4
Wrap the sealing pad from the base of the unit to the top
of the flare nut.
NOTICE
Make sure to insulate all refrigerant piping. Any exposed
piping might cause condensation.
14
Electrical installation
DANGER: RISK OF ELECTROCUTION
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.
Installation and operation manual
16
B
d
b
e f
a
b
c
d
b
e f
2
1
3
2
g
g
4
4
14.1
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 of the product
Voltage
Frequency
Phase
(a)
MCA
(a)
MCA=Minimum circuit ampacity. Stated values are maximum
values (see electrical data of indoor unit for exact values).
Wiring / circuit breaker (field supplied)
Power supply cable
MUST comply with national wiring
Wire size based on the current, but not
Transmission wiring
Only use harmonised wire providing
double insulation and suitable for
User interface cable
Only use harmonised wire providing
double insulation and suitable for
Recommended circuit
breaker
Residual current device
MUST comply with national wiring
14.2
To connect the electrical wiring to
the indoor unit
NOTICE
▪ Follow the wiring diagram (delivered with the unit,
located at the inside of the service cover).
▪ For instructions on how to connect the optional
equipment, see the installation manual delivered with
the optional equipment.
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
It is important to keep the power supply and the transmission wiring
separated from each other. In order to avoid any electrical
interference the distance between both wirings should ALWAYS be
at least 50 mm.
220~240 V/220 V
50/60 Hz
1~
FXKQ 20, 25, 32: 0.4 A
FXKQ40: 0.6 A
FXKQ50: 0.9 A
FXKQ63: 1.4 A
regulation.
3-core cable
2
less than 1.5 mm
applicable voltage
2-core cable
2
Minimum size 0.75 mm
applicable voltage
2-core cable
2
Minimum size 0.75 mm
Maximum length 500 m
6 A
regulation
FXKQ-A
VRV system air conditioner
3P747532-1A – 2023.11
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