LG UU12 - Indoor Unit Drain Piping

Installation Manual 33
ENGLISH
Indoor Unit Drain Piping
CAUTION: Install certainly the decorative panel.
Cool air leakage causes sweating.  Water drops fall.
• 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.
• 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
300mm from the unit.
Air conditioner
unit
Ceiling
board
Decorative panel
Decorative
panel
Fit the insulator (this part) and
be careful for cool air leakage
Good example
Air
Cool air leakage
(no good)
Bad example
Ceiling
board
Air conditioner unit
Flexible drain hose
Maintenance
drain port
Upward
routing
not allowed
Pipe clamp
Indoor unit
700 or less
1 -1.5m
300mm or less
Flexible drain hose
Clamp metal(attached) Drain hose(attached)
Drain raising pipe
Piping material: Polyvinyl chloride pipe VP-25
and pipe fittings
Heat insulation material: Polyethylene foam with thickness more than 8 mm.
Indoor Unit Drain Piping