Fujitsu Airstage J-II Series Design & Technical Manual page 623

„ VERTICAL AIR HANDLER TYPE
„
On the main drain, provide 1 trap near the indoor unit.
This unit has a primary and a secondary drain port.
Indoor unit
Base or return plenum
(Locally purchased)
A: 3-15/16 in. (100 mm) (Approx.)
B: 1-15/16 to 3-15/16 in. (50 to 100 mm)
A
B
Downward gradient 1/100
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