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Figure 11: Indoor Unit Sound Pressure Level
Measurement Location.
4.9 ft.
Microphone
Figure 12: Four-Way Ceiling Cassette Indoor Unit
Sound Pressure Level Diagrams.
LCN098HV4
90
80
70
60
50
40
30
20
10
63
125
250
500
1000
2000
Octave Band Center Frequency (Hz)
LCN249HV
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)
• 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 pressure levels are measured in dB(A)±1.
• Tested in anechoic chamber per ISO Standard 3745.
Ceiling
Table 8: Four-Way Ceiling Cassette Indoor Unit Sound Levels (dB[A]).
LCN128HV4
80
70
NC-70
60
NC-65
NC-60
50
NC-55
NC-50
40
NC-45
NC-40
NC-35
30
NC-30
NC-25
20
NC-20
Approximate
Hearing
NC-15
Threshold
10
4000
8000
63
125
Octave band center frequency (Hz)
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
125
Octave Band Center Frequency (Hz)
©
Sound Pressure Levels (dB[A])
Model
H
LCN098HV4
36
LCN128HV4
38
LCN188HV4
43
LCN249HV
40
LCN369HV
44
LCN429HV
46
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
LCN369HV
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
250
500
1000
2000
4000
8000
ACOUSTIC DATA
Indoor Units
Sound Power Levels (dB[A])
M
L
33
30
35
32
41
38
37
35
42
41
43
41
LCN188HV4
LCN429HV
80
75
70
65
60
55
50
45
40
35
30
25
20
Approximate
Hearing
15
Threshold
10
63
125
250
500
1000
2000
4000
Octave Band Center Frequency (Hz)
PRODUCT DATA | 25
H
-
-
-
57
61
62
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
8000
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