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Installation
10. Refer to the following figure for installing the drain pipe.
Hanger
Unit: in. (mm)
Ceiling
Air vent
Flexible
39.4–59
(1000–1500)
7.87 (200)
0.79 (20)
11.8
(300)
Note:
Install a U-trap at the end of the drain
pipe to prevent odors.
Drain pipe installation
If the installation requires more than three indoor units, install the main air vent at the front of the
indoor unit that is farthest from the main drain. It may be necessary to install individual air vents
to prevent water flowing back to each indoor unit.
Hanger
Main drain pipe
Individual
air vent
Main air vent
Centralized horizontal drainpipe (more
than 1/100 slope)
13 in. (330 mm)22 in.
(550 mm) maximum
39–59 in. (1–1.5 m)
Ceiling
Centralized drain pipe installation