46 | REFRIGERANT DESIGN
Single Zone W
all Mounted Extended Piping Engineering Manual
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 DESIGN
Design Guideline Summary
Device Connection Limitations
Single zone systems consist of one outdoor unit and one indoor unit. One of the most critical elements of a single zone system is the refriger-
ant piping. Table below lists pipe length limits that must be followed in the design of a Single Zone Wall Mounted Extended Piping refrigerant
pipe system. Refer to figure below for maximum length and elevation of piping.
Table 19: Single Zone Wall Mounted Extended Piping Refrigerant Piping System Limitations.
Pipe Length
(ELF = Equivalent Length of
pipe in Feet)
Longest total equivalent piping length
LS243HLV
LS303HLV
LS363HLV
164.0
164.0
164.0
Shortest total equivalent piping length
9.8
9.8
9.8
Distance between fittings and indoor units or outdoor units
≥20 inches
≥20 inches
≥20 inches
No Additional Refrigerant
24.6
24.6
24.6
Elevation
(All Elevation Limitations are
Measured in Actual Feet)
If outdoor unit is above indoor unit
98.4
98.4
98.4
If outdoor unit is below indoor unit
98.4
98.4
98.4
Additional Refrigerant Needed (oz./ft)
0.38
0.38
0.38
Figure 12: Single Zone System Layout
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
Max Length = A
Max Elevation = B
Unit = Feet
Model
Refrigerant Piping Length (feet)
Indoor Unit
Outdoor Unit
16.4
24.6
32.8
41
49.2
65.6
82
98.4
114.8 131.2 147.6 164.0
LSN243HLV
LSU243HLV
0
0
3.1
6.2
9.3
15.6
21.8
28.0
34.3
40.5
46.7
53.0
LSN303HLV
LSU303HLV
0
0
3.1
6.2
9.3
15.6
21.8
28.0
34.3
40.5
46.7
53.0
LSN363HLV
LSU363HLV
0
0
3.1
6.2
9.3
15.6
21.8
28.0
34.3
40.5
46.7
53.0
• Values are in ounces (oz.).
• Capacity is based on standard length; maximum allowance length is based on reliability.
• Equivalent pipe length = actual pipe number of bends x 0.3.
• Calculation: X oz. = ([Refrigerant Piping Length] - [(Chargeless Length]) × Additional Refrigerant.
Table 20: Single Zone Wall Mounted Extended Piping Additional Refrigerant by Piping Length (oz.).
