3.10 Outdoor unit cabin
3.10.1 Outdoor cabin louver requirement
1) Outdoor cabin type : Manual door open type
2) Louver angle : less than 15° on the horizontal base
3) Louver interval: over 100mm (recommend)
4) Louver shape : wing type or plane type
The problem in case the louver opening rate is small.
1. Noise can occur due to the increased velocity of the air passing through louver blade.
2. Noise can occur due to the louver blade vibrations.
3. Drop in outdoor fan performance (Excess static pressure damage can cause drop in the performance as well as outdoor
heat exchange efficiency).
4. In case the louver opening rate is small or there is insufficient air flow exchange, it might stop the air conditioner.
[Side view]
ho = h * COS
Total face area(A) = H * W
Number of open space (N) = (number of louver - 1)
Effective face area(Af) = ho * W * N
Louver opening rate (n) = Af/A
Af = A * n
Effective face area of cross section
ho
h
W
[Front view]
H
≤15°
Opening rate by louver radian
• Opening rate and suction should be considered for
louvered outdoor room.
• Do not use 'S' type louver.
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