Indoor Unit Drain Piping - LG L5UC728FA0 Installation Manual

CAUTION: Install certainly the decorative panel.
Cool air leakage causes sweating. � Water drops fall.
Good example
Fit the insulator (this part) and
be careful for cool air leakage
n Indoor Unit 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 32mm.
Piping material: Polyvinyl chloride pipe VP-25
and pipe fittings
• Be sure to execute 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
Air conditioner
unit
Ceiling
board
Decorative panel
Flexible drain hose
(accessory)
Main
drain pipe
Drain
port Glue the joint
Drain hose connection
Use the clip (accessory)
Bad example
Pipe clamp
Indoor unit
Maintenance
drain port
• 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.
Installation of Indoor, Outdoor Unit
Air conditioner unit
Air
Cool air leakage
Flexible drain hose
Flexible drain hose
Flexible drain hose
Installation Manual 27
(no good)
Ceiling
board
Decorative
panel
Upward
routing
not allowed
1/50~1/100
MAX 700mm