LG LSN HSV4 Series Installation Manual page 16

GENERAL DATA
Typical Multi F/Multi F Max Systems
Typical Multi F MAX System with Two Branch Distribution Units
Example: LMU540HV outdoor unit with seven
(7) indoor units, and two (2) branch distribu-
tion units connected.
ODU: Outdoor Unit.
IDU: Indoor Unit.
BD: Branch Distribution Unit(s).
ΣA: Main Piping.
ΣB: Branch Piping (Branch Distribution Unit[s]
to Indoor Unit[s]).
Table 7: Multi F MAX Outdoor Unit Refrigerant Piping System Limitations.
(Outdoor Unit to Branch
Pipe Length
Distribution Units: ΣA)
(ELF = Equivalent
Length of pipe
in Feet)
(Branch Distribution Units
to Indoor Units: B)
If outdoor unit is above or below indoor unit (h1)
Elevation Differential
Between the farthest two indoor units (h2)
(All Elevation
Limitations are
Between branch distribution unit and farthest
Measured in
Actual Feet)
16
ODU
h4 ≤ 49.2 feet
h1 ≤ 98.4 feet
Total piping length (ΣA + ΣB)
Main pipe
Maximum
Total branch piping length (ΣB)
Branch pipe
Maximum
connected indoor unit(s) (h3)
Between branch distribution units (h4)
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A
Y-Branch BDU
A
A
≤475.7 feet
Minimum 10 feet
≤180.4 feet
≤295.3 feet
Minimum
10 feet
≤49.2 feet
≤98.4 feet
≤42.9 feet
≤32.8 feet
≤42.9 feet
MULTI
MULTI
IDU
B
IDU
B
B
IDU
BDU
B
IDU
B
B
B
Table 8: Multi F MAX Piping Sizes.
Main Pipe A
Piping
(inch)
Liquid Ø3/8
of the indoor unit piping
Gas Ø3/4
F
F
MAX
IDU
IDU
IDU
Branch Pipe B
Depends on the size