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Multi F Engineering Manual

ManualsBrandsLG ManualsAir Conditioners9,000 BTU 4-Way Cassette Ceiling Mounted Indoor Unit with 10,400 BTU Heating Capacity, Forced Operation, Dehumidification Mode, Gold Fin, Timer, Auto Restart, Two Thermistor Control, 24-Hour On/Off Timer, Auto Operation, Chaos Swing, Control Lock Function
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Design Guideline Summary
Example: LMU540HV outdoor unit with
seven (7) indoor units, and two (2)
branch distribution units connected.
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Indoor Unit[s]).
B
A
h2 ≤ 49.2 feet
A
h3 ≤ 32.8 feet
h4 ≤ 49.2 feet
h1 ≤ 98.4 feet
BDU Y-Branch
BDU
IDU
A
ODU
IDU
IDU
IDU
IDU
IDU
IDU
B
B
B
B
B
B
7DEOH Multi F MAX Outdoor Unit Refrigerant Piping System Limitations.
Pipe Length
(ELF = Equivalent
Length of pipe in Feet)
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Main pipe (Outdoor Unit to
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Minimum
10 feet
Maximum
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Branch pipe (Branch Distribu-
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Minimum
10 feet
Maximum
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Elevation Differential
(All Elevation
Limitations are
Measured in Actual
Feet)
If outdoor unit is above or below indoor unit (h1)
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Between the farthest two indoor units (h2)
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Between branch distribution unit and farthest
connected indoor unit(s) (h3)
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Between branch distribution units (h4)
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7DEOH Multi F MAX Piping Sizes.
Piping
Main Pipe A
(inch)
Branch Pipe B
Liquid Ø3/8
Depends on the size
of the indoor unit piping
Gas Ø3/4
Example: LMU540HV outdoor unit with
four (4) indoor units, and one (1) branch
distribution unit connected.
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Indoor Unit[s]).
A
h2 ≤ 49.2 feet
h3 ≤ 32.8 feet
h1 ≤ 98.4 feet
BDU
ODU
IDU
IDU
IDU
IDU
B
B
B
B
Multi F MAX System with One Branch Distribution Unit
Multi F MAX System with Two Branch Distribution Units
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REFRIGERANT PIPING DESIGN
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200 | DESIGN & PRACTICES
Multi F and Multi F MAX Indoor Unit Engineering Manual
MULTI
F
MAX
MULTI
F