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Due to our policy of continuous product innovation, some specications may change without notication.
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20 | FOUR-WAY CASSETTE
Four-Way Ceiling Cassette System Engineering Manual
ACOUSTIC DATA
Outdoor Units
• 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 (acous-
tic absorption coefficient) of particular area in which the equipment is installed.
• Sound power levels are measured in dB(A)±3.
• Tested in anechoic chamber per ISO Standard 3745.
Table 5: Four-Way Ceiling Cassette Outdoor Unit Sound Pressure Levels (dB[A]).
Model
Sound Pressure Levels (dB[A])
Cooling Heating
LUU097HV 47 51
LUU127HV 49 52
LUU187HV 48 52
LUU247HV 48 52
LUU367HV 52 54
LUU427HV 52 54
Figure 8: Four-Way Ceiling Cassette Outdoor Unit
Sound Pressure Level Measurement Location.
3.3 ft.
4.9 ft.
D
Figure 9: Four-Way Ceiling Cassette Outdoor Unit
Sound Pressure Level Diagrams.
LUU187HV, LUU247HV
LUU367HV, LUU427HV
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
Octave Band Sound Pressure Level (0dB = 20μPa)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
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
Octave Band Center Frequency (Hz)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
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
▲ Cooling
Heating
▲ Cooling
Heating
LUU097HV
LUU127HV
LUU187HV, LUU247HV
LUU367HV, LUU427HV
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
Octave Band Sound Pressure Level (0dB = 20μPa)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
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
Octave Band Center Frequency (Hz)
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
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
▲ Cooling
Heating
▲ Cooling
Heating
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