Drain Hose - LG LS091HSV3 Installation Manual
Single zone high efficiency, standard, extended pipe, and mega wall mounted
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Also See for LS091HSV3:
- Owner's manual (102 pages) ,
- Installation manual (86 pages) ,
- Engineering manual (76 pages)
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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.
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.
Figure 49: HSV3 and HV3 Outdoor Unit Drain Connection Components
A
B
B
C
LSU091HSV3, LSU121HSV3
B
Figure 51: HEV and HEV1 Outdoor Unit Drain Connection Components.
B
B
C
A
LSU090HEV, LSU090HEV1, LSU120HEV, LSU120HEV1
40
Figure 47: Correct Slope Angle for Drain Hose
Correct Drainage Slope
Indoor
Unit
Table 29: Outdoor Unit Drain Connection
Legend
Label
A
B
C
A
B
C
LSU181HSV3, LSU240HSV3, LSU307HV3, LSU360HV3
A
B
B
C
B B
B
LSU180HEV, LSU180HEV1
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: Correct Slope Angle for Drain Hose
Downward slope
to outdoor
for proper drainage
Piping
Indoor Unit
Component
Drain Connection
Indoor Unit
Drain Cap
Drain Washer
Figure 50: HXV and HLV Outdoor Unit Drain Connection Components
A
B
C
LSU090HXV, LSU120HXV
B
B
B
C
B
A
LSU240HEV, LSU240HEV1
Incorrect Drainage Setup
Upward slope
to outdoor
Indoor Unit
can cause indoor
leaks!
Water
leakage
Accumulated
drain water
Ai r
Water
Waving
leakage
Tip of drain hose
dipped in water
Water
leakage
Ditch
Less than
2 Inch gap from ground
Drain Hose
A
C
LSU240HLV, LSU300HLV, LSU360HLV
B
B
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