Engineering Manual

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62 | STD. WALL-MOUNTED
Multi F and Multi F MAX Indoor Unit Engineering Manual
MULTI
F
MAX
MULTI
F
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STANDARD WALL-MOUNTED INDOOR UNITS
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• 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 power levels are measured in dB(A)±3.
• Tested in anechoic chamber per ISO Standard 3745.
Model No.
Sound Pressure Levels (dB[A]) (Cooling and Heating)
High Fan Speed
Medium Fan
Speed
Low Fan Speed
LMN078HVT 33 30 26
LSN090HSV4 33 30 27
LSN120HSV4 39 36 31
LMN158HVT 39 36 31
LSN180HSV4 37 33 28
LMN248HVT 42 39 36
Figure 71: Sound Pressure Level Measurement Location.
Table 27: Sound Pressure Levels (dB[A]).
2.6 ft.
3.3 ft.
Microphone
LSN090HSV4 LSN120HSV4
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
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
10
20
30
40
50
60
70
80
63 125 250 500 1000 2000 4000 8000
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
Figure 72: LMN078HVT, LSN090HSV4, and LSN120HSV4 Sound Pressure Level Diagrams.
Approximate
Hearing
Threshold
Octave Band Center Frequency (Hz)
10
20
30
40
50
60
70
80
0008 0004 0002 0001 005 052125 3636
NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
LMN078HVT
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