12 Unit installation
Installation and operation manual
19
FXUA50~100AVEB
VRV system air conditioner
3P668115-2C – 2022.01
To connect the drain piping to the indoor unit
NOTICE
Incorrect connection of the drain hose might cause leaks,
and damage the installation space and surroundings.
Drain piping can be connected from 3 directions:
A
B
C
a c
c
b
a d
a d
c
e
f
A
Right piping
B
Rear piping
C
Upward piping
a
Sealing material (large) (accessory)
b
Drain hose (accessory)
c
Metal clamp (accessory)
d
Elbow (accessory)
e
Longer side of elbow (rear piping)
f
Shorter side of elbow (upward piping)
c
a
b
e d c g
e d c g
10~15 mm
A
A'
A
A'
5
3
2
d
e
f
6
90°
90°
A-A'
A-A'
A
B
1
4
3~6
1~2
a
Drain pipe connection (attached to the unit)
b
Vinyl tape (field supply)
c
Drain hose (accessory)
d
Metal clamp (accessory)
e
Large sealing pad (accessory)
f
Drain piping (field supply)
g
Tightened part of metal clamp
A
In case of bending the end of the metal clamp
B
In case of wrapping the end of the metal clamp with vinyl
tape
1
Push the drain hose or the elbow (for rear and upward piping)
as far as possible over the drain pipe connection.
2
For rear and upward piping, wrap the vinyl tape 2 or 3 times
around the elbow so that the tape covers more than the width of
the metal camp, leaving 10~15 mm unwrapped at the end of the
elbow.
3
Tighten the metal clamp over the taped part of the elbow or
drain hose with a torque of 1.35±0.15N·m. Wrap the end of the
metal clamp with vinyl tape or bend the end inwards to avoid
damaging the sealing pad.
4
19]).
5
Wind the large sealing pad (= insulation) around the metal
clamp and drain hose, and fix it with tie wraps. Start wrapping
from the tightened part of the metal clamp so that the end of the
metal clamp is wrapped twice.
6
Connect the drain piping to the drain hose.
To check for water leaks
The procedure differs depending on whether installation of the
system is already completed. When installation of the system is not
yet completed, temporarily connect the user interface and power
supply to the unit.
When installation of the system is not yet completed
1
Temporarily connect electrical wiring.
▪ Remove the service cover. See
electrical wiring to the indoor unit"
▪ Connect the user interface (a).
▪ Connect the power supply (b).
▪ Reattach the service cover. See
electrical wiring to the indoor unit"
N
L
b
a
a
User interface terminal block
b
Power supply terminal block
2
Turn ON the power.
3
Start fan only operation (see the reference guide or the service
manual of the user interface).
4
Gradually pour approximately 1 l of water through the air
discharge outlet, and check for leaks.
3
4
2
1
b
c
a
≥100 mm
a
Plastic water container with tube length ≥100 mm
b
Drain pump and float switch location
c
Service drain outlet (with rubber plug). Use this outlet to
drain water from the drain pan.
5
Turn OFF the power.
6
Disconnect the electrical wiring.
▪ Remove the service cover. See
electrical wiring to the indoor unit"
▪ Disconnect the power supply.
▪ Disconnect the user interface.
▪ Reattach the service cover. See
electrical wiring to the indoor unit"
When installation of the system is already completed
1
Start cooling operation (see the reference guide or the service
manual of the user interface).
2
Gradually pour approximately 1 l of water through the water
inlet, and check for leaks (see
