Drain Piping - LG ARNU36GTYB4 Installation Manual

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
32 mm.
Piping material: Polyvinyl chloride pipe VP-25 and
pipe fittings
• Be sure to install 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.
Flexible drain hose
(accessory)
Main
drain pipe
Drain
port
Glue the joint
Drain hose connection
Use the clip (accessory)
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.
Max 300 mm
Metal
clamp
Flexible drain hose
Flexible drain hose
Insulation
Installation Manual 19
Installation
Upward
routing
not allowed
1/50~1/100
MAX 700 mm
Hanger
distance
Hanger Bracket
1~15 m
1/50~1/100 slope
Flexible drain hose