Daikin FXFA20A2VEB - Guidelines When Installing the Drain Piping

16 | Unit installation
Installer and user reference guide
57
FXFA20~125A2VEB
VRV system air conditioner
4P599624-1A – 2020.06
b Installation guide (accessory)
c Unit
▪ Level. Make sure the unit is level at all 4 corners using a level or a water-filled
vinyl tube.
c
bba
a Level
b Vinyl tube
c Water level
NOTICE
Do NOT install the unit tilted. Possible consequence: If the unit is tilted against the
direction of the condensate flow (the drain piping side is raised), the float switch
might malfunction and cause water to drip.
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 25mm nominal diameter and 32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
O Allowed
X 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.