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a b
c
d
e
f
a
Round part
b
Rectangular part of the decoration side panel
c
Decoration side panel
d
Screw
e
Reinforcing plate
f
Right refrigerant piping
4 After the drain and refrigerant piping is finished, install the
reinforcing plate (optional step) and the decoration side panel
back.
c
a
b
a
Screw
b
Reinforcing plate
c
Decoration side panel
▪ 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
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)
(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.
FHA-A(9)
Split system air conditioner
3P668115-4E – 2022.11
B
d
b
e f
a
b
c
d
b
e f
3
2
3
2
1
g
4
14 Electrical installation
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.
Component
Interconnection
Only use harmonized wire providing double
cable
insulation and suitable for applicable voltage
(indoor↔outdoor)
User interface
Only use harmonized wire providing double
cable
insulation and suitable for applicable voltage
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:
"To mount the indoor
Specification
4-core cable
Minimum size 2.5 mm²
2-core cable
Minimum size 0.75 mm²
Maximum length 500 m
unit" [ 4 15].
Installation and operation manual
19
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