Fujitsu Airstage J-II Series Design & Technical Manual page 617

5-2. INDOOR UNIT
„ GENERAL RULES OF DRAIN PIPING
„
● Install the drain pipe with downward slope (1/100 or more) and so there are no rises in the
„
pipe.
● Use general hard polyvinyl chloride pipe (ø3/4 [I.D.] ; ø1-1/16 [O.D.]) and connect it with
„
adhesive (polyvinyl chloride) so that there is no leakage.
● Support the drain pipe with supports each 60 to 78 in. (1.5 to 2 m)
„
● Do not install any air vents or traps.
„
● Always insulate the drain pipe to prevent condensation.
„
● When connecting the drain hose to the indoor unit, use the accessory band. (Except
„
compact wall mounted type and wall mounted type)
„ COMPACT CASSETTE TYPE
„
11 in. (300 mm)
or less
drain hose
(accessory)
Attached band

● Drain lift-up pipe restrictions:
„
(1) Lift-up height ≤ 27 in. (700 mm) (from ceiling)
(2) Drain hose (pipe) length ≤ 11 in. (300 mm) (between indoor unit and lift-up pipe)
● When a dimensions exceed the above restrictions will cause water leakage.
„
Downward
slope 1/100 or
more
ø3/4 [I.D.] ; ø1-1/16 [O.D.]
(Locally purchased)
Horizontal or
upward gradient
Prohibited

Air vent
Rise

Trap
- (06 - 53) -
60 to 78 in. (1.5 to 2.0 m)
Downward gradient
1/100 or more
Hanging fitting