Drain Piping; Drain Test - LG 2 Serie Manual De Instalación

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(1-1/4 inch).
Piping material: Polyvinyl chloride pipe inner diometes
Ø 25mm(1 inch) and pipe fittings
• Be sure to install heat insulation on the drain piping.
Heat insulation material: Polyethylene foam with thick-
ness more than 8mm(5/16 inch).

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 flexi-
ble drain hose to the drain port on the indoor
unit.
Flexible drain hose
Installation Manual 13
Installation
Upward
routing
not allowed
1/50~1/100
• TE : 700 mm
MAX
(27-9/16 inch)
• TM/TN/TP : 800 mm
(31-12 inch)
Flexible drain hose Flexible drain hose
1/50~1/100
• TE : 700 mm
MAX (27-9/16 inch)
• TM/TN/TP : 800 mm
Flexible drain hose
(31-12 inch)