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Centralized drainage
Without the drain pump
1. Install horizontal drain pipe with a slope of 1/100 or more and fix it by hanger space of 3.28~4.92ft (1~1.5m).
2. Install U-trap at the end of the drain pipe to prevent odor to reach the indoor unit.
3. The drain pipe should not be installed at an upward position; it may cause water flowing back to the unit.
3.94inch
(100mm)
or more
With the drain pump
1. Install main air vent at the front of the farthest indoor unit from the main drain pipe when installed indoor units are more
than 3.
2. You may need to install individual air vent to prevent water flow back at the top of each indoor unit drain pipe.
Hanger
Main drain pipe
Ceiling
Individual
air vent
ENGLISH-21
Horizontal drain pipe
(Slope above 1/100)
3.28~4.92ft
(1~1.5m)
Main air vent
Centralized horizontal drain
pipe (Slope above 1/100)
21.65inch
(550mm) or less
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