Indoor Unit Drain Piping - LG 24K BTU Installation Instructions Manual

CAUTION
Install certainly the decorative panel.
Cool air leakage causes sweating.
Good example
Fit the insulator (this part) and
be careful for cool air leakage

8. 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.
The air conditioner uses a drain pump to drain water.
Drain test
Use the following procedure to test the drain pump operation:
Feed water
Drain Pump
Drain pan
¤ Water drops fall.
Bad example
Air conditioner
unit
Ceiling
board
Decorative panel
Pipe clamp
Maintenance
drain port
Flexible drain hose
(accessory)
Main
drain pipe
Drain
port Glue the joint
Drain hose connection
Use the clip (accessory)
14
Air
Indoor unit
• 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.
Air conditioner unit
Cool air leakage
(no good)
Ceiling
board
Decorative
panel
Upward
routing
not allowed