Daikin VRV system FXMQ250AXVMB - Page 46

16 | Unit installation
Installer and user reference guide
46
FXMQ-A
VRV system air conditioner
4P701548-1 – 2022.07
▪ 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
Allowed
Not allowed
▪ Condensation. Take measures against condensation. Insulate the complete drain
piping in the building.
▪ Combining drain pipes. It is possible to combine drain pipes. Use drain pipes and
T-joints with the correct gauge for the operating capacity of the units.
≥100
a a
a T-joint
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.
a
b
a Drain pipe connection
b Refrigerant pipes
Drain piping connection
1 Pull out the drain plug.
2 Install the adapter for the drain hose (field supply).
3 Push the drain hose as far as possible over the adapter for the drain hose.
4 Tighten the metal clamp until the screw head is less than 4 mm from the
metal clamp part.
5 Check for water leaks (see "To check for water leaks"[447]).
6 Install the insulation piece (drain pipe).