Indoor Unit Drain Piping - LG ARNU48GBRZ4 Installation Manual

1. Install declination of the indoor unit is very important for the drain of the duct type air
conditioner.
2. Minimum thickness of the insulation for the connecting pipe shall be 5mm.
• The unit must be horizontal or declined to the drain hose connected when finished installation.
Drain Pump
unuse

Indoor Unit 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.
Piping material: Polyvinyl chloride pipe inner
diometes 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
CAUTION : The supplied flexible
drain hose should not be strained.
A strained hose may cause leakage
of water.
CAUTION
Front of view
Ceiling
Drainage hole
Flexible drain hose
(accessory)
Main
drain pipe
Drain
port Glue the joint
Drain hose connection
Use the clip (accessory)
Drain Pump
Drainage hole
use
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 operation
and noise when electrical wiring is complete.
• When the test is complete, connect the flexible drain
hose to the drain port on the indoor unit.
Installation
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
Installation Manual 13