Fujitsu Airstage J-IVS AJ 040LCLDH Series Design & Technical Manual page 735

¢ Low static pressure duct (Slim duct)/Slim concealed floor type
• Ceiling concealed setting
Arrange the drain hose
lower than this position
Locally arranged pipe
Max. 300 mm
• Floor standing concealed setting
– Install the drain pipe with downward gradient (1/100 or more) and so there are no rises or traps
in the pipe.
– Use general hard polyvinyl chloride pipe (VP25) (O.D. 32 mm) and connect it with adhesive
(polyvinyl chloride) so that there is no leakage.
– When the pipe is long, install supporters.
– Do not perform air bleeding.
– Always heat insulate the indoor side of the drain pipe.
5-2. Indoor unit
Drain hose
Drain cap
Prohibited
Trap
Gap of 1.5 to 2 m
VP25
(O.D. 32 mm
or more)
Horizontal or
upward gradient
Drain cap
Rise
Supporter
Prohibited
Trap
- (06-75) -
Supporter
1.5 m to 2.0 m
Air bleeding
Prohibited
Air bleeding
Trap
Rise
5. Drain connection
Rise