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Installation
Drain Piping
• Drain piping must have down-slope (1/50 to
1/100): be sure not to provide up-and-down slope
to prevent reversal flow.
• During drain piping connection, be careful not to
exert extra force on the drain port on the indoor
unit.
• The outside diameter of the drain connection on
the indoor unit is 32 mm.
Piping material: Polyvinyl chloride pipe VP-25
and pipe fittings
• Be sure to install heat insulation on the drain pip-
ing.
Heat insulation material: Polyethylene foam
with thickness more than 8 mm.
Drain test
The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:
Feed water
Drain Pump
Drain pan
CAUTION : The supplied flexible
drain hose should not be curved,
neither screwed. The curved or
screwed hose may cause a leakage
of water.
10
Indoor Unit
Flexible drain hose
(accessory)
Main
drain pipe
Drain
port
Glue the joint
Drain hose connection
Use the clip (accessory)
Pipe clamp
Indoor unit
Maintenance
drain port
• Connect the main drain pipe to the exte-
rior and leave it provisionally until the
test comes to an end.
• Feed water to the flexible drain hose
and check the piping for leakage.
• Be sure to check the drain pump for nor-
mal operating and noise when electrical
wiring is complete.
• When the test is complete, connect the
flexible drain hose to the drain port on
the indoor unit.
Max 300 mm
Metal
Flexible drain hose
clamp
Insulation
Upward
routing
not allowed
1/50~1/100
MAX 700 mm
Flexible drain hose
Hanger
distance
Hanger Bracket
1~15 m
1/50~1/100 slope
Flexible drain hose
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