12 Unit installation
Installation and operation manual
18
FXUA50~100AVEB
VRV system air conditioner
3P668115-2C – 2022.01
Fix the blocking pad to the air outlet.
f
d
e
c
b
f
e
a
1
h
b
d c
g
3
2
d
a
a
b
1
1
2
2
3
3
a
Protruding part
b
Blocking pad
c
Drain pan
d
Lower decoration panel
e
Insulation
f
Upper decoration panel
g
Bent part of blocking pad
h
Space between lower decoration panel and drain pan
1
Insert the protruding part (2 locations) of the blocking pad into
the space between the upper decoration panel and the
insulation.
2
Insert the bent parts (2 locations) at the ends of the blocking
pad a little into the space between the lower decoration panel
and insert the blocking pad.
▪ If the blocking pad is difficult to insert, first loosen the screws on
both sides of the lower decoration panel and then insert it.
a b
b a
2×
2×
a
a
b
b
A
B
A
Side without piping connection
B
Side with piping connection
a
Lower decoration panel
b
Screw
3
Insert the bent parts (2 locations) at the middle of the blocking
pad into the space between the lower decoration panel and the
drain pan until you hear a clicking sound.
4
Check that the sheet metal section of the blocking pad does not
protrude from the lower decoration panel.
NOTICE
Make sure there is no space between the blocking pad and
the indoor unit. Any remaining space may cause air
leakage and condensation.
12.2.2
Guidelines when installing the drain
piping
Make sure condensation water can be evacuated properly. This
involves:
▪ General guidelines
▪ Connecting the drain piping to the indoor unit
▪ Checking for water leaks
General guidelines
▪
Pipe length.
Keep drain piping as short as possible.
▪
Pipe size.
Keep the pipe size equal to or greater than that of the
connecting pipe (vinyl pipe of 20 mm nominal diameter and
26 mm outer diameter).
▪
Slope.
Make sure the drain piping slopes down (at least 1/100) to
prevent air from being trapped in the piping. Use hanging bars as
shown.
1~1.5 m
a
a
Hanging bar
Allowed
Not allowed
▪
Condensation.
Take measures against condensation. Insulate
the complete drain piping in the building.
▪
Rising piping
. If necessary to make the slope possible, you can
install rising piping.
▪ Drain hose inclination: 0~75 mm to avoid stress on the piping
and to avoid air bubbles.
▪ Make sure to install the rising piping vertically upright. Inclined
rising piping may cause water leakage.
e
e
600
1000~1500
a b
d
c
(mm)
b c
O
OK
X
Not OK
a
Metal clamp (accessory)
b
Elbow for upward or rear piping (accessory)
c
Rising drain piping (vinyl pipe of 20 mm nominal diameter
and 26 mm outer diameter) (field supply)
d
Drain hose for right piping (accessory)
e
Hanging bars (field supply)
▪
Combining drain pipes.
You can combine drain pipes. Make
sure to use drain pipes and T-joints with the correct gauge for the
operating capacity of the units.
a
≥100
≤600
(mm)
a
T-joint