Guidelines When Installing The Drain Piping - Daikin FXMA50A5VEB Installer And User Manual

16.2.3 Guidelines when installing the drain piping

General guidelines
FXMA-A
VRV system air conditioner
4P680920-1 – 2022.01
Make sure condensation water can be evacuated properly. This involves:
▪ General guidelines
▪ Connecting the drain piping to the indoor unit
▪ Checking for water leaks
▪ 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.
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.
- Rising piping: ≤300 mm from the unit, ≤625 mm perpendicular to the unit.
a b
a Metal clamp (accessory)
b Drain hose (accessory)
c Rising drain piping (vinyl pipe of 25 mm nominal diameter and 32 mm outer
diameter) (field supply)
d 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.
1~1.5 m
a
≤300 1000~1500
a b c d
a
16 Unit installation
|
(mm)
d
(mm)
Installer and user reference guide
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