Fujitsu AJ 126LELDH Series Design & Technical Manual page 782

¢ 3D flow cassette type
• Drain lift-up pipe restrictions:
– Lift-up height ≤ 850 mm (from ceiling)
– Drain hose (pipe) length ≤ 300 mm (between indoor unit and lift-up pipe)
• When a dimensions exceed the above restrictions will cause water leakage.
• Install the drain hose horizontally or with a slight upward gradient so air pocket is not generated in
the drain pipe. The air pocket may cause noise occurred due to water backfl ow when the drain
pump is stopped.
5-2. Indoor unit
300 mm
VP25 (O.D. 32 mm)
or less
local arrangement
Hanging fittings
VP25 (O.D. 32 mm)
Downward gradient 1/100 to 1/50
Prohibited
Rise Trap
- (06-68) -
Downward gradient
1/100 to 1/50
Horizontal or
upward gradient
1.5 to 2.0 m
Air bleeding
5. Drain connection