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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
HMLHML
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
Octave Band Sound Pressure Level (0dB = 20ȝ3D )
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
Octave Band Sound Pressure Level (0dB = 20ȝ3D )
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
Octave Band Sound Pressure Level (0dB = 20ȝ3D )
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
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