Refrigerant Piping System Layout - LG LS091HSV3 Installation Manual

Underground Refrigerant Piping
Refrigerant pipe installed underground should be routed inside a
vapor tight protective sleeve to prevent insulation deterioration and
water infiltration. Refrigerant pipe installed inside underground
casing must be continuous without any joints. Underground
refrigerant pipe must be located at a level below the frost line.
Table 23: Utility Conduit Sizes.
Liquid Pipe
1
3/8 (1-1/8
1/4 (1.0) 4
3
3/8 (1-1/8) 4
3
OD pipe diameter in inches; Values in parenthesis () indicate OD of pipe with insulation jacket.
1
2 Diameter of pipe with insulation. Thickness of pipe insulation is typical. Actual required thickness may
vary based on surrounding ambient conditions and should be calculated and specified by the design
engineer.
Insulation thickness (value in parenthesis) = 3/8 inch.
3
Insulation thickness (value in parenthesis) = 1 inch.
4
GENERAL INSTALLATION GUIDELINES
Vapor Pipe
1
) 1/2 (2.0 ) 5/8 (2-1/8
2,3 2,4
4 4
4 4
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.

Refrigerant Piping System Layout

Figure 39: Typical Arrangement of Refrigerant Pipe and Cable(s) in a
Utility Conduit.
)
2,4
Table 24: Heat Pump Unit Refrigerant Pipe Connections (All Brazed
Type)
Model
LSU091HSV3, LSU121HSV3
LSU181HSV3, LSU240HSV3
LSU307HV3, LSU360HV3
LSU240HLV, LSU300HLV, LSU360HLV
LSU090HEV, LSU120HEV,
LSU090HEV1, LSU120HEV1,
LSU090HXV, LSU120HXV
LSU180HEV, LSU180HEV1
LSU240HEV, LSU240HEV1
Vapor Line
Insulation Material
Liquid Line
Pipe Sleeve
Insulation
Material
Min. 18 Gauge
Power/Communication
Cable
Liquid Conn. Vapor Conn.
(inches) (inches)
1/4 3/8
3/8 5/8
3/8 5/8
3/8 5/8
1/4 3/8
1/4 1/2
1/4 5/8
35