Acoustic Data - LG MULTI F Engineering Manual

FOUR-WAY CEILING-CASSETTE INDOOR UNITS

Acoustic Data

Figure 188: Sound Pressure Level Measurement Location.
Figure 189: LMCN077HV and LMCN097HV Sound Pressure Level Diagrams.
LMCN077HV
80
70
60
50
40
30
20
Approximate
Hearing
Threshold
10
63 125 250 500
Octave Band Center Frequency (Hz)
138 | CEILING-CASSETTE
Ceiling
4.9 ft.
Microphone
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
1000 2000 4000 8000
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• Measurement taken 4.9' away from the unit.
• 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 76: Sound Pressure Levels (dB[A]).
Sound Pressure Levels (dB[A]) (Cooling and Heating)
Model No.
High Fan Speed
LMCN077HV
LMCN097HV
LMCN125HV
LMCN185HV
LMCN097HV
90
80
70
60
50
40
30
20
10
63 125 250 500 1000
Octave Band Center Frequency (Hz)
MULTI
MULTI
Medium Fan
Low Fan Speed
Speed
31 27
36 33
38 35
38 37
NC-70
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
2000 4000 8000
F
F
MAX
24
30
32
34