Nc Curves - Mitsubishi Electric PUHY-P250YHM-A Data Book

3-2. NC Curves

PUHY-P250YHM-A
Standard 50/60Hz
NightMode 50/60Hz
When Night Mode is set,the A/C system's capacity is limited. The system could return to normal
ig
operation from ht Mode automaticall in the case that the operation condition is severe.
90
80
70
60
50
40
30
20
Approximate minimum
audible limit on
continuous noise
10
63Hz 125Hz 250Hz
OCTAVE BAND CENTER FREQUENCIES (Hz)
PFD-P250VM-E
63Hz 125Hz 250Hz 500Hz
70.6 62.7 60.5 56.1
90
80
70
60
50
40
30
20
Approximate minimum
audible limit on
continuous noise
10
63Hz 125Hz 250Hz
OCTAVE BAND CENTER FREQUENCIES (Hz)
(External static
pressure 0Pa)
63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz 4000Hz 8000Hz
59.0 62.0 60.0 54.0 50.5 46.0 41.0
58.0 53.5 44.0 39.0 36.5 32.5 31.0
Standard 50/60Hz
Night Mode 50/60Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500Hz 1000Hz 2000Hz 4000Hz 8000Hz
(External static
pressure 120Pa)
1000Hz 2000Hz 4000Hz 8000Hz dB(A)
54.8 45.7 39.7 32.9 59
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500Hz 1000Hz 2000Hz 4000Hz 8000Hz
dB(A)
35.0 57.0
24.5
44.0
PFD-P500VM-E
63Hz 125Hz 250Hz 500Hz
82.8 70.5 65.6 57,0
90
80
70
60
50
40
30
20
Approximate minimum
audible limit on
continuous noise
10
63Hz 125Hz 250Hz 500Hz
OCTAVE BAND CENTER FREQUENCIES (Hz)
10
(External static
pressure 120Pa)
1000Hz 2000Hz 4000Hz 8000Hz dB(A)
55.1 51.1 44.7 37.9 63
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000Hz 2000Hz 4000Hz 8000Hz