LGRED Installation Manual

25
Installation
Due to our policy of continuous product innovation, some specifications may change without notification.
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MULTI
F
MAX
MULTI
F
WITH
Figure 8: 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
Selecting the Best Location for the Outdoor Unit
Confirming Air Flow Rate / Total Opening Rate
• Example: LMU361HHV
• Discharge Airflow Rate: 4,238 ft.
3
/min.
• Velocity of Outlet Air: 12.9 ft./s
• Velocity of Inlet Air: 7.7 ft./s
• Open Rate = 80% or More
• Inlet airflow should match or exceed discharge
airflow.
• Separate inlet airflow from discharge airflow to
prevent recirculation.
Open Rate = Effective Face Area (Af)
Total Face Area (A)
Figure 9: Example of Installing Outdoor Unit Indoors.
Formula
• Total Louver Dimension (Excluding Frame) (A) = 3.9 feet x 6.2 feet = 24.2 ft.
2
• Area Blocked by Outdoor Unit (Discharge) (B) = 3.12 feet x 4.53 feet = 14.13 ft.
2
• Inlet Louver Dimension (A - B) = 10.1 ft.
2
• Equivalent Inlet Dimension (Open Rate 80%) = 10.1 ft.
2
x 0.8 = 8.08 ft.
2
• Equivalent Inlet Air Volume = 8.08 ft.
2
x 7.7 ft./s x 60 sec./min. = 3,734 ft.
3
/min.
• Equivalent Inlet Airflow / Discharge Airflow = 3,734 ft.
3
/min. / 4,238 ft.
3
/min. = 88% (Not Allowed; Suction Airflow Must Equal /
Exceed Discharge Airflow)
55-1/8
47-1/4
74-13/16
Unit: Inch
Air Guide Duct
Louver Dimensions
Air Guide Duct on
Outdoor Unit
Outdoor Unit
Dimensions
54-11/32
37-3/8