Refrigerant Piping Design - LG LD097HV4 Engineering Manual

Device Connection Limitations
A single-zone ceiling-concealed ducted system consists of one outdoor unit and one indoor unit. One of the most critical elements of a
single-zone ceiling-concealed ducted system is the refrigerant piping. The table below lists pipe length limits that must be followed in the
design of a single-zone ceiling-concealed ducted refrigerant pipe system:
Table 58: Single-Zone Ceiling-Concealed Ducted
System Model Name
Pipe Length
(ELF = Equivalent Length of Pipe)
Elevation
(All Elevation Limitations are
Measured in Actual Feet)
Additional Refrigerant Needed (oz/ft)
System Layout
Figure 65: Typical LD097HV4, LD127HV4 System Layout.
Max Length = A
Max Elevation = B
Indoor unit
66
A
B
Outdoor unit
Figure 67: Typical LH368HV4 System Layout.
Max Length = A
Max Elevation = B
Indoor unit
246
A
B
Outdoor unit

REFRIGERANT PIPING DESIGN

Refrigerant Piping System Limitations.
Longest total equivalent piping
length
Shortest total equivalent
piping length
Distance between fittings and
indoor or outdoor units
No additional refrigerant
If outdoor unit is above indoor
unit
If outdoor unit is below indoor
unit
Unit = Feet
Outdoor unit
66
A
B
Indoor unit
Unit = Feet
Outdoor unit
246
A
B
Indoor unit
Due to our policy of continuous product innovation, some specifications may change without notification.
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Design Guideline Summary
LD097HV4, LD127HV4 LD187HV4, LH248HV4
66 feet
6.6
≥20 inches
25 feet
49 feet
49 feet
0.22
Figure 66: Typical LD187HV4, LH248HV4 System Layout.
Max Length = A
Max Elevation = B
Indoor unit
164
A
B
Outdoor unit
LH368HV4
164 feet 246 feet
6.6 6.6
≥20 inches ≥20 inches
25 feet 25 feet
98 feet 98 feet
98 feet 98 feet
0.43 0.43
Unit = Feet
Outdoor unit
164
A
B
Indoor unit
DUCTED | 83