Drain Piping - LG JRNU15GTPA4 Installation Manual

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 ow.
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
32 mm.
Piping material: Polyvinyl chloride pipe VP-25 and
pipe ttings
Be sure to install heat insulation on the drain piping.
Heat insulation material: Polyethylene foam with thick-
ness 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 exible 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 exible 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
exible drain hose to the drain port on the
indoor unit.
Max 300 mm
Metal
clamp
Flexible drain hose
Insulation
Installation Manual 11
Installation
Upward
routing
not allowed
1/50~1/100
MAX 700 mm
Hanger
distance
Hanger Bracket
1~15 m
1/50~1/100 slope
Flexible drain hose
Flexible drain hose