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• Do not give the hose an upward gradient beyond
the connection port. This will cause water to flow
backwards when the unit is stopped, resulting in
water leaks.
Under gradient
• 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
Ceiling
1 to 1.5 m (3 ft 3 in.
to 4 ft 11 in.)
1/100 or more
Ceiling
Flexible hose
Max. 20 mm (3/4 in.)
• Max. allowable bending angle.
Indoor unit
NOTE
• If a concentrated drain pipe is installed, refer to the
figure below.
100 mm (4 in.)
or more
Air ventilation
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.
Flexible hose
Hose
b After pouring some water, reassemble the rubber
cap on the connection part of a flexible hose of
the indoor unit and firmly tighten it with a band
to prevent leakage.
c Check the leak test at the part where the adhesive
for the flexible hose and the drain pipe is used.
Max. 30˚
Concentrated
drain pipe
1/100 or
more slope
Water leakage
check part
English
15
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