Condensate Drain Piping; Piping Insulation - LG LC247HV Engineering Manual

Minimum Refrigerant Pipe Ethylene Propylene Diene Methylene (EPDM) Insulation Wall Thickness Requirements,
continued.
3. Non-air conditioned, Typical location: When the piping passes through an indoor area where the indoor unit does not
operate.
• Hallway or a dormitory or school, etc.
4. Non-air conditioned, Special location: If conditions 1 and 2 below are present.
1. When the piping passes through an indoor area where the indoor unit does not operate.
2. When the humidity is high and there is no air flow in the location where the piping is installed.
• The thickness of the above insulation material is based on heat conductivity of 0.61 Btu/in/h/ft

Condensate Drain Piping

Condensate drain piping should be constructed out of materials approved by local codes (generally PVC). Slope gradient for the drain should
be 1/50~1/100, and support hangers should be used at 3-5/16 to 5 foot intervals to keep the condensate drainage system stable (see table
below), and to reduce vibration.
Figure 52: Condensate Drain Piping Gradient.
Indoor unit
Or
Outdoor unit
Table 44: Interval per Drainage Pipe Diameter.
Pipe Diameter (Inches)
Maximum Interval (feet)
Outdoor Units
See page 47 to 52 for information in reference to outdoor unit placement and condensate drainage.
Indoor Units
The Four-Way Ceiling Cassette indoor units include a factory-installed drain pump. Depending on the location of the indoor unit, condensa-
tion can be drained directly to the outside of the building, or tied into a drainage piping system.
Table 45: Drain Piping Specifications.
Indoor Unit
Four-Way Ceiling Cassette
reFrigerant PiPing DeSign
13/16 ~ 1-9/16 1-9/16 ~ 2
≤3.28
Drain Pipe Dia. (inches)
(External / Internal)
1-1/4 / 1
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.
Piping Insulation / condensate drain Piping
2-9/16 ~ 4-15/16
≤4 ≤5
Drain Pump Drain Lift Height (inches)
Standard
/°F.
2
Gradient of at least 1 / 50 ~ 1 / 100
Amount of Drainage (gpm)
(at 0.4 inches high)
31-1/2 0.106
duct (HIGH StatIc) | 63