LG MULTI V ARNU07GTUA4 Engineering Product Data Book page 372

Indoor unit
11. Installation
11.7 Indoor Unit Drain Piping
• Drain piping must have down-slope (1/50 to 1/100): be sure not to pro-
vide 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.
Piping material: Polyvinyl chloride pipe inner
diameter Ø 25mm and pipe fittings
• Be sure to install heat insulation on the drain piping.
Heat insulation material: Polyethylene foam with
thickness more than 8 mm.
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
The supplied flexible drain hose should not be strained.
A strained hose may cause leakage of water.
Flexible drain hose
• Connect the main drain pipe to the exterior and leave it pro-
(accessory)
Main
drain pipe
• Feed water to the flexible drain hose and check the piping
Drain
port Glue the joint
• Be sure to check the drain pump for normal operation and
Drain hose connection
Use the clip (accessory)
• When the test is complete, connect the flexible drain hose to
Pipe clamp
Indoor unit
Maintenance
drain port
visionally until the test comes to an end.
for leakage.
noise when electrical wiring is complete.
the drain port on the indoor unit.
Flexible drain hose
Upward
routing
not allowed
1/50~1/100
MAX 700mm
Hanger
distance
Hanger Bracket
Max 300mm
1~15m
1/50~1/100 slope
Metal
clamp
Flexible drain hose
Insulation
Flexible drain hose
Flexible drain hose
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Fresh Air Intake Unit