LG A8UW54GFA0 Installation Manual page 27

[Ceiling Concealed Duct/Ceiling 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 32 mm(1 1/4 inch).
Piping material: Polyvinyl chloride pipe inner
diameter Ø 25 mm(1 inch) and pipe fittings
• Be sure to install heat insulation on the drain piping.
Heat insulation material: Polyethylene foam
with thickness more than 8 mm(5/16 inch).
Drain test
The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:
• 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.
!
CAUTION
The supplied flexible drain hose
should not be curved, neither
screwed. The curved or screwed
hose may cause a leakage of water.
h The figure can be changed according to model.
Pipe clamp
Indoor unit
Maintenance
drain port
Feed water
Drain Pump
Drain pan
Installation
Upward
routing
not allowed
1/50~1/100
MAX : 700 mm(27 9/16 inch)
Flexible drain hose
(accessory)
Main
drain pipe
Drain
port Glue the joint
Drain hose connection
Use the clip (accessory)
Flexible drain hose Flexible drain hose Flexible drain hose
Flexible drain hose
1/50~1/100
Installation Manual 27