Multi F Engineering Manual

Acoustic Data
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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).
• Tested in anechoic chamber per ISO Standard 3745.
)LJXUHSound Pressure Level Measurement Location.
Model No.
Sound Pressure Levels (dB[A]) (Cooling and Heating)
High Fan Speed
Medium Fan
Speed
Low Fan Speed
LMCN078HV 31 27 24
LCN098HV4 36 33 30
LCN128HV4 38 35 32
LCN188HV4 41 39 36
7DEOHSound Pressure Levels (dB[A]).
)LJXUHLMCN078HV and LCN098HV4 Sound Pressure Level Diagrams.
4.9 ft.
Ceiling
Microphone
FOUR-WAY CEILING-CASSETTE INDOOR UNITS
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
Octave Band Center Frequency (Hz)
NC-15
NC-70
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
Sound Pressure Level (dB re 20uPa)
LCN098HV4
Octave Band Sound Pressure Level (dB re 20Pa)
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
LMCN078HV
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122 | CEILING-CASSETTE
Multi F and Multi F MAX Indoor Unit Engineering Manual
MULTI
F
MAX
MULTI
F