Mitsubishi Electric PLA-A12EA7 Service Manual page 140

11 NOISE CRITERION CURVES
PEAD-A12AA7
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
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
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
Due to continuing improvement, above specification may be subject to change without notice.
140
60.0
55.0
50.0
45.0
40.0
External static pressure 0.14 [in.WG] (35Pa)
35.0
High Low
Middle
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125
PEAD-A24AA5
250 500 1k 2k 4k
Octave band center frequencies (Hz)
External static pressure 0.20 [in.WG] (50Pa)
High Low
70.0
Middle
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
250 500 1k 2k 4k
Approximate minimum
Octave band center frequencies (Hz)
10.0
audible limit on
continuous noise
External static pressure 0.28 [in.WG] (70Pa)
5.0
High Low
0.0 Middle
63 125
NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops.
may be bigger than displayed level under actual installation condition by surrounding echoes. The
can be higher by about 2 dB than the displayed level during cooling and heating operation.
250 500 1k 2k 4k
Octave band center frequencies (Hz)
P-Series (March 2017)
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
250 500 1k 2k
20.0
Octave band center frequencies (Hz)
NC-20
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
8k 63 125
70.0
External static pressure 0.28 [in.WG] (70Pa)
65.0
High
Middle
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
250 500 1k 2k
room where echoes are few, when compressor
Octave band center frequencies (Hz)
NC-60
stops. The sound may be bigger than displayed
level under actual installation condition by sur-
NC-50
rounding echoes. The sound level can be higher
by about 2 dB than the displayed level during
cooling and heating operation.
NC-40
NC-30
NC-20
2m
8k
Measurement location
60.0
NC-60
55.0
50.0
NC-50
45.0
40.0
External static pressure 0.40 [in.WG] (100Pa)
NC-40
35.0
High Low
Middle
30.0
NC-30
25.0
20.0
NC-20
15.0
10.0
5.0
0.0
4k 8k 63
PEAD-A24AA5
250 500 1k 2k 4k
Octave band center frequencies (Hz)
External static pressure 0.60 [in.WG] (150Pa)
High Low
70.0
Middle
Low
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
250 500 1k 2k 4k
Octave band center frequencies (Hz)
10.0
5.0
0.0
4k 8k
63
Aux. duct
test unit
© 2017 Mitsubishi Electric US, Inc.
NC-60
NC-50
Approximate minimum
NC-40
audible limit on
continuous noise
NC-30
125 250 500 1k
Octave band center frequencies
NC-20
8k
External static pressure 0
NC-60
NC-50
NC-40
NC-30
NC-20
8k
Approximate minimum
audible limit on
continuous noise
125 250 500 1k
Octave band center frequencies
1m
Hig
Mid