16
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Unit installation
Installer and user reference guide
56
FXUA50~100AVEB
VRV system air conditioner
4P673843-1 – 2022.01
NOTICE
Make sure there is no space between the blocking pad and the indoor unit. Any
remaining space may cause air leakage and condensation.
16.2.2 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.
