14 Electrical installation
Installation and operation manual
18
FXHQ-A
VRV system air conditioner
3P668115-3E – 2022.11
A
B
a
d
c
e f
b
b
a
d
c
e f
b
b
2
4
3
g
1
2
3
1
B
A
A
Gas piping
B
Liquid piping
a
Insulation material (field supply)
b
Tie wrap (accessory)
c
Insulation pieces: Large (gas pipe), small (liquid pipe)
(accessory)
d
Flare nut (attached to the unit)
e
Refrigerant pipe connection (attached to the unit)
f
Unit
g
Small sealing pad (accessory)
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
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.
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
Voltage
220~240 V/220 V
Frequency
50/60 Hz
Phase
1~
Current
63: 0.8 A
FXHQ100: 1.6 A
Components
Power supply cable
MUST comply with national wiring
regulation.
3-core cable
Wire size based on the current, but not
less than 1.5 mm
2
Transmission wiring
Only use harmonised wire providing
double insulation and suitable for
applicable voltage
2-core cable
Minimum size 0.75 mm
2
User interface cable
Only use harmonised wire providing
double insulation and suitable for
applicable voltage
2-core cable
Minimum size 0.75 mm
2
Maximum length 500 m
Recommended circuit
breaker
16 A
Residual current device
MUST comply with national wiring
regulation
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.
NOTICE
Be sure to keep the power line and transmission line apart
from each other. Transmission wiring and power supply
wiring may cross, but may NOT run parallel.
1
Remove the service cover.
2
Open the knockout hole and install the resin bushing
(accessory). Refer to:
14]. The
location depends on the power supply wiring route. For
transmission and user interface cable, choosing the same route
as the refrigerant piping is recommended.
50 mm
b c
a
d
c
a
Power supply wiring
b
Resin bushing (accessory)
c
Sealing material for gaps around pipes and cables
(accessory)
d
User interface cable and transmission cable
