Indoor Unit Drain Piping - LG AT-C186PLE1 Installation Manual

Installation
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

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
• 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
CAUTION: The supplied flexible
drain hose should not be curved,
neither screwed. The curved or screwed
hose may cause a leakage of water.
18 Ceiling Cassette Air Conditioner
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)
Water drops fall.
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.
Air conditioner unit
Air
Cool air leakage
(no good)
Ceiling
board
Decorative
panel
Upward
routing
not allowed
1/50~1/100
MAX 700mm
Flexible drain hose Flexible drain hose
1/50~1/100
MAX 700mm