Installation Manual

26 Air Conditioner
Indoor Unit Drain Piping
CAUTION :The supplied
flexible drain hose should not
be curved, neither screwed.The
curved or screwed hose may
cause a leakage of water.
• Connect the main drain pipe to the exterior 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 normal
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.
The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:
Drain test
Feed water
Drain Pump
Drain pan
Flexible drain hose
(accessory)
Main
drain pipe
Glue the joint
Drain
port
Drain hose connection
Use the clip (accessory)
1/50~1/100
Flexible drain hoseFlexible drain hose
[Cassette Type]
• 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 32mm(1 1/4 inch).
•
Be sure to install heat insulation on the drain piping.
Piping material: Polyvinyl chloride pipe inner
diometes Ø 25mm(1 inch) and pipe fittings
Heat insulation material: Polyethylene foam
with thickness more than 8mm(5/16 inch).
Maintenance
drain port
Upward
routing
not allowed
Pipe clamp
Indoor unit
1/50~1/100
MAX : 800mm
(32-1/2 inch)