Mitsubishi Electric PLA-A12EA7 Service Manual page 141

11 NOISE CRITERION CURVES
PEAD-A18AA7
External static pressure 0.14 [in.WG] (35Pa)
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250
Octave band center frequencies (Hz)
External static pressure 0.20 [in.WG] (50Pa)
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250
Octave band center frequencies (Hz)
External static pressure 0.28 [in.WG] (70Pa)
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250
Octave band center frequencies (Hz)
Due to continuing improvement, above specification may be subject to change without notice.
© 2017 Mitsubishi Electric US, Inc.
High Low
Middle
500 1k 2k 4k
High Low
Middle
500 1k 2k 4k
High Low
Middle
500 1k 2k 4k
70.0
65.0
60.0
NC-60
55.0
50.0
NC-50
45.0
40.0
NC-40
35.0
30.0
NC-30
25.0
20.0
NC-20
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
8k 63 125
70.0
65.0
60.0
NC-60
55.0
50.0
NC-50
45.0
40.0
NC-40
35.0
30.0
NC-30
25.0
20.0
NC-20
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
8k 63 125
NOTE: The sound level is measured in an anechoic
room where echoes are few, when compressor
NC-60
stops. The sound may be bigger than displayed
level under actual installation condition by sur-
rounding echoes. The sound level can be higher
NC-50
by about 2 dB than the displayed level during
cooling and heating operation.
NC-40
NC-30
NC-20
8k
P-Series (March 2017)
External static pressure 0.40 [in.WG] (100Pa)
High
Middle
250 500 1k 2k
Octave band center frequencies (Hz)
External static pressure 0.60 [in.WG] (150Pa)
High
Middle
250 500 1k 2k
Octave band center frequencies (Hz)
Low
NC-60
NC-50
NC-40
NC-30
NC-20
4k 8k
Low
NC-60
NC-50
NC-40
NC-30
NC-20
4k 8k
141