LG Multi V ARNU093TUD4 Engineering Manual page 44

TWO-WAY CEILING CASSETTE
Acoustic Data
Sound Pressure Levels
Figure 27: Sound Pressure Measurement Location.
4.9 ft.
Table 21: Two-Way Ceiling Cassette Indoor Unit Sound Pressure Levels.
Model
ARNU183TSA4
ARNU243TSA4
Figure 28: ARNU183TSA4 and ARNU243TSA4 Sound Pressure Level Diagrams.
ARNU183TSA4
80
75
70
65
60
55
50
45
40
35
30
25
20
Approximate
Hearing
15
Threshold
10
63 125 250 500 1000 2000
Octave Band Center Frequency (Hz)
44 | T WO-WAY
• 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.
•
Ceiling
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.
High Fan Speed
35.0
40.0
80
High
Middle
75
Low
70
65
NC-65
60
NC-60
55
NC-55
50
NC-50
45
NC-45
40
NC-40
35
NC-35
30
NC-30
25
NC-25
20
Approximate
Hearing
NC-20
15
Threshold
NC-15
10
4000 8000
63
©
Sound Levels dB(A)
Medium Fan Speed
33.0
37.0
ARNU243TSA4
High
Middle
Low
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
125 250 500 1000 2000 4000 8000
Octave Band Center Frequency (Hz)
Low Fan Speed
31.0
33.0