PRODUCT DATA | 21
Product Data
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4.9 ft.
Ceiling
Microphone
Figure 12: Indoor Unit Sound Pressure Level
Measurement Location.
• 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.
Figure 13: Four-Way Ceiling Cassette Indoor Unit
Sound Pressure Level Diagrams.
Table 8: Four-Way Ceiling Cassette Indoor Unit Sound Levels (dB[A]).
Model
Sound Pressure Levels (dB[A])
Cooling
Heating
H
M
L
H
M
L
LCN188HV4
41
39
36
41
39
36
LCN249HV
40
37
35
40
37
35
LCN369HV
44
42
41
44
42
41
LCN429HV
46
43
41
46
43
41
LCN489HV
46
43
41
46
43
41
ACOUSTIC DATA
Indoor Units
LCN188HV4
LCN249HV
LCN369HV
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
63
125
250
500
1000
2000
4000
8000
Octav
e
Band Sound
Pressure Lev
el
(0dB = 20
ȝ3D
)
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
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
63
125
250
500
1000
2000
4000
8000
Octav
e
Band Sound
Pressure Lev
el
(0dB = 20
ȝ3D
)
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
LCN429HV, LCN489HV
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
63
125
250
500
1000
2000
4000
8000
Octav
e
Band Sound
Pressure Lev
el
(0dB = 20
ȝ3D
)
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