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28
MULTI F / MULTI F MAX Outdoor Unit Installation Manual
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.
MULTI
F
MAX
MULTI
F
Figure 10: Open Rate by Louver Radian Formula.
Side View
ho = h * COS
Total Area (A) = H * W
Number of Open Spaces (N) = (Number of Louvers - 1)
Effective Area (Af) = ho * W * N
Louver Open Rate (n) = Af / A
Af = A * n
Effective Cross Section Area
ho
h
W
Front View
H
Open Rate by Louver Radian
PLACEMENT CONSIDERATIONS
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55-1/8
47-1/4
37-3/8
74-13/16
32-13/16
Unit: Inch
Air Guide Duct
Louver Dimensions Air Guide Duct on
Outdoor Unit
Outdoor Unit
Dimensions
Formula
• Total Louver Dimension (Excluding Frame) (A) = 3.9 feet x 6.2 feet = 24.2 ft.
2
• Louver Shield Dimension by Product (B) = 3.12 feet x 2.74 feet = 8.55 ft.
2
• Inlet Louver Dimension (A - B) = 15.7 ft.
2
• Equivalent Inlet Dimension (Open Rate 80%) = 15.7 ft
2
x 0.8 = 12.56 ft.
2
• Equivalent Inlet Air Volume = 12.56 ft.
2
x 8.2 ft./s x 60 sec./min. = 6,179.5 ft.
3
/min.
• Required Air Volume / Equivalent Volume = 6,179.5 ft.
3
/min. / 2,119 ft.
3
/min. = 291% (Within Allowable Limits)
Confirming Air Flow Rate / Total Opening Rate
• Example: LMU36CHV
• Airflow Rate: 2,119 ft.
3
/min.
• Velocity of Outlet Air: 16.4 ft./s
• Velocity of Inlet Air: 8.2 ft./s
• Open Rate = 80% or More
• Discharge Air Guide must be installed.
Figure 11: Example of Installing Outdoor Unit Indoors.
Open Rate = Effective Face Area (Af)
Total Face Area (A)
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