LG LMCN077HV 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 8: Multi F MAX LMU480HV and LMU540HV Outdoor Unit Refrigerant Piping System
(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)
Table 9: Multi F MAX Piping Sizes.
Model Piping
Liquid
LMU480HV
Gas
Liquid
LMU540HV
Gas
16
ODU
h4 ≤ 49.2 feet
h1 ≤ 98.4 feet
Limitations.
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)
Main Pipe A
Branch Pipe B
(inch)
Ø3/8
Depends on the size
of the indoor unit piping
Ø3/4
Ø3/8
Depends on the size
of the indoor unit piping
Ø3/4
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.
A
Y-Branch BDU
A
A
≤475.7 feet
Minimum
9.8 feet
≤180.4 feet
≤295.3 feet
Minimum 9.8 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
F
F
MAX
IDU
IDU
IDU