Acoustic Data - LG LH247HV Engineering Manual

Figure 6: Ceiling-Concealed Duct (High Static) Outdoor Unit Sound
Pressure Level Measurement Location.
D
3.3 ft.
Figure 7: Ceiling-Concealed Duct (High Static) Outdoor Unit Sound Pressure Level Diagrams.
LUU247HV
LUU187HV, LUU247HV
80
▲ Cooling
70
60
50
40
30
20
Approximate
Hearing
Threshold
10
63 125 250 500 1000 2000 4000
Octave Band Center Frequency (Hz)
4.9 ft.
LUU367HV
LUU367HV, LUU427HV
80
Heating
70
NC-65
60
NC-60
NC-55
50
NC-50
NC-45
40
NC-40
NC-35
30
NC-30
NC-25
20
NC-20 Approximate
Hearing
Threshold
NC-15
10
8000
63 125
Octave Band Center Frequency (Hz)
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• Measurements taken with no attenuation and units operating at full
load normal operating condition.
• Sound level will vary depending on a range of factors such as
construction (acoustic absorption coefficient) of particular area in
which the equipment is installed.
• Sound power levels are measured in dB(A)±3.
• Tested in anechoic chamber per ISO Standard 3745.
Table 4: Ceiling-Concealed Duct (High Static) Outdoor Unit Sound
Pressure Levels (dB[A]).
Model
LUU247HV
LUU367HV
▲ Cooling
Heating
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
250 500 1000 2000 4000 8000

aCouStiC data

outdoor units
Sound Pressure Levels (dB[A])
Cooling Heating
48
52
duct (HIgH StatIc) | 15
52
54