LG MULTI V ARNU243TTD4 - Page 44

44 | TWO-WAY
MULTI V Ceiling Cassette Indoor Unit Engineering Manual
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Acoustic Data
TWO-WAY CEILING CASSETTE
Model
Sound Levels dB(A)
High Fan Speed Medium Fan Speed Low Fan Speed
ARNU183TSA4 35.0 33.0 31.0
ARNU243TSA4 40.0 37.0 33.0
Table 21: Two-Way Ceiling Cassette Indoor Unit Sound Pressure Levels.
Figure 27: Sound Pressure Measurement Location.
Sound Pressure Levels
Figure 28: ARNU183TSA4 and ARNU243TSA4 Sound Pressure Level Diagrams.
• Measurements are taken 4.9 ft. away from the front of the unit.
• Data is valid under nominal operating conditions.
• Sound pressure levels are measured in dB(A) with a tolerance of ±3.
• Sound pressure levels are tested in an anechoic chamber under ISO Standard
3745.
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Operating Conditions:
• Power source: 220V/60 Hz
• Sound level will vary depending on a range of factors including the construction
(acoustic absorption coefficient) of a particular room in which the unit was installed.
4.9 ft.
Ceiling
ARNU183TSA4
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
63 125 250 500 1000 2000 4000 8000
Octave Band Sound Pressure Level (dB = 20Pa )
Octave Band Center Frequency (Hz)
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
High
Middle
Low
ARNU243TSA4
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
63 125 250 500 1000 2000 4000 8000
Octave Band Sound Pressure Level (dB = 20Pa )
Octave Band Center Frequency (Hz)
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
Approximate
Hearing
Threshold
 High
Middle
Low