Drain Piping - LG Multi V 2 Series Installation Manual

Installation

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 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.
12 Indoor Unit
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 flex-
ible drain hose to the drain port on the
indoor unit.
Flexible drain hose
Upward
routing
not allowed
1/50~1/100
MAX 700mm
(27-9/16 inch)
Flexible drain hose Flexible drain hose
1/50~1/100
MAX 700mm
(27-9/16 inch)
Flexible drain hose