Indoor Unit Drain Piping; Drain Test - LG ABNW85GB9A0 Installation Manual

The indoor unit installation

Indoor Unit Drain Piping

• Drain piping must have down-slope : 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.
(Ceiling Concealed Duct – High static: 65 mm)
Piping material: Polyvinyl chloride pipe VP-25
and pipe fittings
• Be sure to execute heat insulation on the drain
piping.
• Install the drain raising pipes at a right
angle to the indoor unit and no more than
300 mm from the unit.
Heat insulation material: Polyethylene foam with thickness more than 10 mm.

Drain test

Feed water
CAUTION: The supplied flexible drain
hose should not be curved, neither
screwed. The curved or screwed hose
may cause a leakage of water.
18
• Connect the main drain pipe to the exterior and leave
it provisionally until the test comes to an end.
Flexible drain hose
(accessory)
• Feed water to the flexible drain hose and check the
Main
drain pipe
piping for leakage.
• When the test is complete, connect the flexible drain
Glue the joint
hose to the drain port on the indoor unit.
Pipe clamp
Indoor unit
Maintenance
drain port
Max 300 mm
Metal
clamp
Insulation
Upward
routing
not allowed
Hanger
distance
Hanger Bracket
1~15 m
1/50~1/100 slope
Flexible drain hose