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LG Multi V 5 Engineering Manual

LG Multi V 5
105 pages
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LIMITS / PLACEMENT | 93
Piping Limitations and Placement Considerations
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Downstream IDU total capacity
(Btu/h)
Liquid pipe (inches OD)
Vapor pipe (inches OD)
Low pressure High pressure
 1/4Ø 1/2Ø 3/8Ø
<54,600 3/8Ø 5/8Ø 1/2Ø
<76,400 3/8Ø 3/4Ø 5/8Ø
<114,700 3/8Ø 7/8Ø 3/4Ø
<172,000 1/2Ø 1-1/8Ø 7/8Ø
<229,400 5/8Ø 1-1/8Ø 7/8Ø
<248.500 5/8Ø 1-3/8Ø 1-1/8Ø
<344,000 3/4Ø 1-3/8Ø 1-1/8Ø
<592,500 3/4Ø 1-5/8Ø 1-3/8Ø
Table 26: Refrigerant Pipe (B) Diameters between Y-branches and Y-branches / Heat Recovery Unit / Headers.
Table 27: Indoor Unit Connecting Pipe from Branch (C).
Indoor Unit Capacity
1
Liquid pipe (inches OD) Vapor pipe (inches OD)
 1/4Ø 1/2Ø
 3/8Ø 5/8Ø
 3/8Ø 3/4Ø
 3/8Ø 7/8Ø
1
9,600-24,200 Btu/h 4-way 3 feet x 3 feet Cassette and 15,400-24,200 Btu/h High Static Ducted IDUs have 3/8Ø (liquid) and 5/8Ø (vapor).
PIPING LIMITATIONS
For Systems Designed for Heat Recovery Operation
Following pages present Multi V 5 piping limitations and are for illustrative purposes only. Designers MUST use LATS when designing LG VRF systems.
Conditional Applications
Conditional applications are computed in LATS. See below for an explanation of when pipes are upsized.
If the equivalent length between the first Y-branch to the farthest indoor unit is >131 feet (maximum 295 feet):
Pipe segment diameters between the first branch and the last branch must be sized up by one. This applies to both liquid and low / high
vapor pipes. If the next size up is not available, or if the pipe segment diameters are the same as main pipe (A) diameters, sizing up is not
possible.
While calculating total refrigerant piping length, pipe (B) segment lengths between the first Y-branch and second Y-branch, and between the
second Y-branch and the heat recovery unit must be calculated by two.
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feet.

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LG Multi V 5 Specifications

General IconGeneral
TypeVRF (Variable Refrigerant Flow)
RefrigerantR410A
Compressor TypeInverter Scroll Compressor
Outdoor Unit Fan TypeAxial Fan
Cooling Capacity22.4 kW to 270 kW
Energy EfficiencyHigh
Operating RangeCooling: -5°C to 48°C
Power Supply380-415V, 50/60Hz
Heat Exchanger TypeMicrochannel
Control TypeCentralized Control
Indoor Unit OptionsCassette, Wall Mounted, Ducted
Heat RecoveryAvailable
WarrantyVaries by region (typically 5 years compressor, 1-2 years parts)

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