Drain Hose - LG LV240HV4 Installation Manual

Indoor Unit Drain Hose Guidelines
Refer to the diagrams below and follow proper
installation and the running of the drain hose
along the pipe installation line to avoid leak-
age. Once drain hose is set in place, always
follow with evacuation and leakage testing
of all piping to be sure all piping is properly
sealed. Re-check and retest as necessary.
Drain hose is routed from the indoor unit
through the structure (wall) to the outdoors.
It must slope at an angle where it is higher at
the indoor unit and lower toward the outdoor
area, thereby letting gravity push any conden-
sation down and out. Avoid piping the drain
hose as shown in Figure 50. These methods
are incorrect and can cause leaks at the
indoor unit site.
The drain hose may need to be extended so
that condensate can be properly routed away.
The drain hose extension must be correctly
insulated to ensure any condensation will not
damage walls, floors, etc. Foamed polyeth-
ylene or equivalent at least 5/16 inches thick
is recommended.
Figure 49: Correct Slope Angle
for the Drain Hose.
Correct Drainage Slope
Downward slope
to outdoor
for proper drainage
Indoor
Unit
REFRIGERANT PIPING CONNECTIONS
Upflow Drain
Horizontal-left
Drain Knockout
Insulate Drain Pipe
Unit
Make sure to be closed.
Piping
Figure 50: Incorrect Slope Angles for the Drain Hose.
Incorrect Drainage Setup
Indoor Unit
Water
leakage
Indoor Unit
Water
leakage
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Figure 48: Drain Piping
Air filter cover
Auxiliary drain
with proper trap. (field
supplied kit can be used)
Main drain along with suitable trap.
( Field supplied trap with sufficient
depth can be used. P-traps of standard
size are not sufficient. Refer to the figure
below for recommended condensate trap.)
Applied U-Trap Dimension
Thermal insulator
A ≥
B ≥ 2C
(Field supply)
C ≥ 2 x SP
Drainage pipe
(Field supply)
SP = External Pressure
Ex) External Pressure
Drainage hole
CORRECT
• Install the U-Trap to prevent water leaks
caused by a blocked intake air filter
Indoor Unit
Upward slope
to outdoor
can cause indoor
leaks!
Accumulated
drain water

Drain Hose

Ai r
Waving
Drain Hose
Horizontal Left Drain
2-9/16 inch
(in.wc)
C
A
= 0.4 in. wc
A ≥ 2-9/16 inch
B ≥ 1-7/12 inch
C ≥ 19/24 inch
Tip of drain hose
dipped in water
Water
leakage
Ditch
Less than
2 Inch gap from ground
3/4 inch
connector
B
U-Trap
41