LG MULTI V 5 Engineering Manual page 91

Following pages present Multi V 5 piping limitations and are for illustrative purposes only. Designers MUST use LATS when designing LG VRF systems.
Figure 26: Typical Heat Recovery System Building Layout with Piping Limitations.
Max. Total Equivalent Piping Length: 3,280'
Table 24: Piping Limitations for Heat Recovery Operation (See next page).
Total pipe length
Length
Elevation1
Elevation2
Elevation3
Elevation4
height1
Distance between Outdoor Unit to Outdoor Unit
Distance between two Y-branches / Headers
Height differential between two Heat Recovery Units if installed with a Y-branch
Height differential between two series-piped Heat Recovery Units
Assume equivalent pipe length of Y-branch is 1.6 feet, and equivalent pipe length of header is 3.3 feet.
1
For Systems Designed for Heat Recovery Operation
Elevation Differential Two
IDUs Connected to One
HRU: 49'
Longest pipe length after first branch
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PIPING LIMITATIONS
Longest actual pipe length
49 feet
49 feet
Equivalent pipe length
1
LIMITS / PLACEMENT | 91