4 Installation
Installation and operation manual
7
FXFQ20~125BVEB
VRV system air conditioner
4P540926-1B – 2019.01
▪ Remove the switch box cover (a).
▪ Connect the user interface and transmission wiring (b).
▪ Connect the power supply (1~ 220-240 V 50/60 Hz) and
earth (c).
▪ Reattach the switch box cover (a).
b
a
c
N
L
2
Turn ON the power.
3
Start cooling operation (see
"6.2 To perform a test run" on
page 10
).
4
Gradually pour approximately 1 l of water through the air
discharge outlet, and check for leaks.
≥100 mm
e
d
c
b
a
a
Plastic watering can
b
Service drain outlet (with rubber plug). Use this outlet to
drain water from the drain pan.
c
Drain pump location
d
Drain pipe connection
e
Drain pipe
5
Turn OFF the power.
6
Disconnect the electrical wiring.
▪ Remove the switch box cover.
▪ Disconnect the power supply and earth.
▪ Disconnect the user interface.
▪ Reattach the switch box cover.
When electrical wiring is finished already
1
Start cooling operation (see
"6.2 To perform a test run" on
page 10
).
2
Gradually pour approximately 1 l of water through the air
discharge outlet, and check for leaks (see
"When electrical
wiring is not finished yet" on page 6
).
4.2
Connecting the refrigerant piping
DANGER: RISK OF BURNING
4.2.1
To connect the refrigerant piping to the
indoor unit
CAUTION
Install the refrigerating 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
B
a
d
c
e f
b
b
a
d
c
e f
b
b
2
4
3
g
1
2
3
4
g
A
B
1
A
Gas piping
B
Liquid piping
a
Insulation material (field supply)
b
Cable tie (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 1 (gas pipe), medium 2 (liquid pipe)
(accessories)
1
Turn up the seams of the insulation pieces.
2
Attach to the base of the unit.
3
Tighten the cable ties 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.
4.3
Connecting the electrical wiring
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 provide 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.
