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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
piping.
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.
Pipe clamp
Maintenance
drain port
• Connect the main drain pipe to the
Flexible drain hose
exterior and leave it provisionally until
(accessory)
the test comes to an end.
Main
drain pipe
• Feed water to the flexible drain hose
and check the piping for leakage.
Drain
port
Glue the joint
• Be sure to check the drain pump for
normal operating and noise when
Drain hose connection
Use the clip (accessory)
electrical wiring is complete.
• When the test is complete, connect the
flexible drain hose to the drain port on
the indoor unit.
Indoor unit
Flexible drain hose
Hanger
distance
Max 300 mm
1~15 m
Metal
Flexible drain hose
clamp
Flexible drain hose
Insulation
Installation Manual 11
Installation
Upward
routing
not allowed
1/50~1/100
MAX 700 mm
Hanger Bracket
1/50~1/100 slope
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