Refrigerant Piping Design; Design Guideline Summary - LG LC098HV4 Engineering Manual

REFRIGERANT PIPING DESIGN

Design Guideline Summary

Device Connection Limitations
A single-zone four-way ceiling cassette system consists of one outdoor unit and one indoor unit. One of the most critical elements of a
single-zone four-way ceiling cassette system is the refrigerant piping. The table below lists pipe length limits that must be followed in the
design of a single-zone four-way ceiling cassette refrigerant pipe system.
Table 42: Single-Zone Four-Way Ceiling Cassette
System Model Name
Pipe Length
(ELF = Equivalent
Length of Pipe)
Elevation
(All Elevation Limitations are
Measured in Actual Feet)
Additional Refrigerant Needed (oz/ft)
DFS System Layout
Figure 47: Typical LC098HV4 and LC128HV4 System Layout.
Max Length = A
Max Elevation = B
Indoor unit
66
A
B
Outdoor unit
Figure 49: Typical LC347HV and LC427HV System Layout.
Max Length = A
Max Elevation = B
Indoor unit
246
A
B
Outdoor unit
68 | INTRODUCTION
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.
©
LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
LC187HV, LC188HV4,
LC098HV4, LC128HV4
66 feet
6.6
≥20 inches ≥20 inches
24.6 feet
49 feet
49 feet
0.22
Figure 48: Typical LC187HV, LC188HV4, and LC247HV System Layout.
Max Length = A
Max Elevation = B
Indoor unit
164
A
B
Outdoor unit
LC367HV, LC427HV
LC247HV
164 feet 246 feet
6.6 6.6
≥20 inches
24.6 feet 24.6 feet
98 feet 98 feet
98 feet 98 feet
0.43 0.43
Unit = Feet
Outdoor unit
164
A
B
Indoor unit