Indoor Unit Drain Piping; Drain Test - LG UB85W.N94R0 Installation Manual

Indoor Unit Drain Piping

• Drain piping must have down-slope (15 mm
~ 25 mm): 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 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
• Connect the main drain pipe to the exterior and leave
Flexible drain hose
it provisionally until the test comes to an end.
(accessory)
Main
• Feed water to the flexible drain hose and check the
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.
The indoor unit installation
Pipe clamp
Indoor unit
Maintenance
drain port
Upward
routing
not allowed
Flexible drain hose
Installation Manual 11