Indoor Unit Drain Piping - LG Multi V ARNU48GBRZ Series 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
unused

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
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
!
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
Installation Manual 13