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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
• Install horizontally.
Be horizontal
Indoor unit
• Max. allowable axis gap
Indoor unit
1 to 1.5 m
1/100 or more
Ceiling
Flexible hose
Max. 20 mm
• Max. allowable bending angle
Indoor unit
NOTE
• If a concentrated drain pipe is installed, refer to the
figure below.
Full thread bolt hanger
Individual
air vent
Main drain pipe
• If 3 or more units are installed, install the main air vent
at the 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 air vent if the horizontal
drain pipe is in proper slope.
1000 to 1500 mm
Main air vent
(must be installed)
200 mm
or more
550 mm or
less
Centralized horizontal drain pipe
(more than 1/100 slope)
15
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