LG LS090HEV1 - Drain Hose

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REFRIGERANT PIPING CONNECTIONS
Drain Hose
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 leakage. 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 outdoor. It
should 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. See Figure 47 for proper
drainage slope. Avoid piping the drain hose
as shown in Figure 48. These methods are
incorrect and can cause leakage at the indoor
unit site.
Downward slope
to outdoor
for proper drainage
Indoor
Unit
Piping
Correct Drainage Slope
Figure 47: Correct Slope Angle for Drain Hose
Upward slope
to outdoor
can cause indoor
leaks!
Water
leakage
Accumulated
drain water
Ai r
Waving
Water
leakage
Indoor Unit
Indoor Unit
Incorrect Drainage Setup
Tip of drain hose
dipped in water
Water
leakage
Ditch
Less than
2 Inch gap from ground
Indoor Unit
Drain Hose
Figure 48: Correct Slope Angle for Drain Hose
Outdoor Unit Drain Hose Guidelines
Depending on installation site, it may be neces-
sary to install a drain plug (factory supplied).
1. See the figures below for drain plug installa-
tion.
2. Connect a field-supplied hose to the drain
connection (A). If the hose is too long, posi-
tion it carefully to prevent kinks.
Do not use a drain hose with the outdoor unit in cold climates, otherwise the drain water may
freeze and impair heating performance.
Label Component
A Drain Connection
B Drain Cap
C Drain Washer
Table 29: Outdoor Unit Drain Connection
Legend
Figure 49: HSV3 and HV3 Outdoor Unit Drain Connection Components
LSU240HEV, LSU240HEV1LSU090HEV, LSU090HEV1, LSU120HEV, LSU120HEV1 LSU180HEV, LSU180HEV1
A
C
B
B
B B B B
B
B
B
A
C
B
B
A
C
B
LSU090HXV, LSU120HXV LSU240HLV, LSU300HLV, LSU360HLV
B
A
C
B
A
C
LSU091HSV3, LSU121HSV3 LSU181HSV3, LSU240HSV3, LSU307HV3, LSU360HV3
BB
A
C
B
B
A
C
Figure 50: HXV and HLV Outdoor Unit Drain Connection Components
Figure 51: HEV and HEV1 Outdoor Unit Drain Connection Components.