LG MULTI V WATER 5 ARW Series - Piping Limitations for systems designed for Heat Pump operation

LIMITS / PLACEMENT | 67
Piping Limitations and Placement Considerations
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Elevation
Differential
WSU to
IDU: 164'
Longest pipe length after first
branch: 131' (295' conditional)
Longest pipe length: 656' actual (738' equiv)
Maximum Total Piping Length: 1,640'
Elevation
Differential
IDU to IDU: 131'
Figure 13: Typical Heat Pump System Building Layout with Piping Limitations.
PIPING LIMITATIONS
For Systems Designed for Heat Pump Operation
Following pages present Multi V Water 5 piping limitations and are for illustrative purposes only. Designers MUST use LATS when designing LG VRF
systems.
Length
Total pipe length Longest actual pipe length Equivalent pipe length
1
A + ΣB + ΣC ≤ 984 ft. (Standard) / 1,640 ft.
(Conditional Application)
492 ft. (Standard) / 656 ft. (Conditional
Application)
574 ft. (Standard) / 738 ft. (Conditional
Applications)
ℓ
Longest pipe length after first branch
≤131 feet (295 feet conditional application)
Elevation1
Elevation differential (Water Source Unit ↔ Indoor Unit)
Height ≤164 feet
Elevation2
Elevation differential (Indoor Unit ↔ Indoor Unit)
Height ≤131 feet
height1
Elevation differential ((Highest Water Source Unit ↔ Lowest Water Source Unit)
Height ≤16 feet
Distance between Water Source Unit to Water Source Unit
≤33 feet
Distance between ttings and Indoor Unit
≥20 inches
Distance between ttings and Y-branches / Headers
≥20 inches
Distance between two Y-branches / Headers
≥20 inches
Table 20: Piping Limitations for Heat Pump Operation.
1
Assume equivalent pipe length of Y-branch is 1.6 feet, and equivalent pipe length of header is 3.3 feet.