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Installation Procedure
Hanger
Main drainpipe
• 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.
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
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.
14
English
Individual
air vent
Water leakage
check part
Flexible hose
1~1.5m
Centralized horizontal drainpipe
(more than 1/100 slope)
CAUTION
• The leak test must be performed for at least 24
hours.
2 Check the condensed water drainage:
a Pour about 2 liters of water into the indoor unit
drain pan as shown in the picture.
b When the electric cable connection is completed
• Turn on the indoor unit and outdoor unit.
• Operate in the Cool mode.
CAUTION
• Only in the Cool mode, you can check the correct
operation of the drain pump.
When the electric cable connection has not been
completed
• Remove the control box cover of the indoor unit.
• Connect the power supply to the L and N terminals.
• Reassemble the control box cover and turn on the
indoor unit.
Main air vent
200 mm or more
300 to 550 mm
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