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• Do not apply force to the piping on the unit side when
connecting the drain hose. The hose should not be
allowed to hang loose from its connection to the unit.
Fasten the hose to a wall, frame or other support as
close to the unit as possible.
Support pieces
Slope of the horizontal drain pipe:
• Install horizontally.
Horizontal
Indoor unit
• Max. allowable aixs gap
Indoor unit
• Max. allowable bending angle
Indoor unit
3.28 to 4.92 ft
(1 to 1.5 m)
Ceiling
1/100 or more
Flexible hose
Max 0.79 inch(20 mm)
NOTE
• If a concentrated drain pipe is installed, refer to the
figure below.
Unit:inch(mm)
Full thread bolt hanger
Individual
air vent
Main drain pipe
• If 3 or more units are installed, install a main air vent
in front of the farthest indoor unit from the main drain
pipe.
• To prevent water from flowing back to indoor units, install
an individual air vent at the top of each indoor unit.
– The air vents should be T or 7 shaped to prevent
dust or foreign substances from entering.
– You may not need to install an air vent if the
horizontal drain pipe has a proper slope.
Step 11 Performing the drainage test
1 Do a leak test at the connection part of the flexible
hose and the drain pipe:
a Connect a general hose to the connection part of
the flexible hose of the indoor unit, and pour in
some water.
Hose
Flexible hose
3.28 to 4.92 ft (1 to 1.5m)
Main air vent
(must be installed)
7.87 inch (200
mm)or more
21.65 inch
(550mm) or less
Centralized horizontal drain pipe
(more than 1/100 slope)
Water leakage
check part
English
17
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