Refrigerant Piping Design - LG LSU243HLV Extended Piping Engineering Manual

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)
Elevation
(All Elevation Limitations are
Measured in Actual Feet)
Additional Refrigerant Needed (oz./ft)
Figure 12: Single Zone System Layout
Max Length = A
Indoor unit
Max Elevation = B
A
B
Outdoor unit
Table 20: Single Zone Wall Mounted Extended Piping Additional Refrigerant by Piping Length (oz.).
Model
Indoor Unit Outdoor Unit
LSN243HLV LSU243HLV
LSN303HLV LSU303HLV
LSN363HLV LSU363HLV
• Values are in ounces (oz.).
• Capacity is based on standard length; maximum allowance length is based on reliability.
• Equivalent pipe length = actual pipe length + number of bends x 0.3.
• Calculation: X oz. = ([Refrigerant Piping Length] - [(Chargeless Length]) × Additional Refrigerant.
46 | REFRIGERANT DESIGN
Longest total equivalent piping length
Shortest total equivalent piping length
Distance between fittings and indoor units or outdoor units
No Additional Refrigerant
If outdoor unit is above indoor unit
If outdoor unit is below indoor unit
A
Indoor unit
16.4 24.6 32.8
0 0 3.1
0 0 3.1
0 0 3.1
Due to our policy of continuous product innovation, some specifications may change without notification.
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LS243HLV
≥20 inches
Unit = Feet
Outdoor unit
B
Refrigerant Piping Length (feet)
41 49.2 65.6 82
6.2 9.3 15.6 21.8
6.2 9.3 15.6 21.8
6.2 9.3 15.6 21.8
LS303HLV
164.0 164.0
9.8 9.8
≥20 inches
24.6 24.6
98.4 98.4
98.4 98.4
0.38 0.38
98.4 114.8 131.2
28.0 34.3 40.5
28.0 34.3 40.5
28.0 34.3 40.5
LS363HLV
164.0
9.8
≥20 inches
24.6
98.4
98.4
0.38
147.6 164.0
46.7 53.0
46.7 53.0
46.7 53.0