B.7 Liebert® MC Large Platform Sound Pressure Data
Sound Pressure at Distance = 10 ft (3.05 m), dB
Octave Band Data
A-Weighted, dBA
Frequency
(Hz)
Percent Fan Speed
Percent Fan Speed
20%
50%
80%
100%
20%
50%
80%
100%
63
33
52
58
63
6
26
32
37
125
34
50
59
70
17
34
43
54
250
34
48
59
66
26
39
51
57
500
39
46
60
65
35
43
57
62
1000
21
43
57
63
21
43
57
63
2000
15
37
53
61
16
38
54
63
4000
13
1
31
47
55
14
1
32
48
56
8000
12
1
25
42
49
11
1
24
41
48
Total
42
56
66
74
36
48
62
68
1
These values indicate the upper boundary limit due to background noise levels. Actual field values ma be equal to or less than that listed.
Sound pressure level data used to develop this table was determined to be in accordance with AHRI Standard 220 and 270. Source: ASHRAE Fundamentals
2009, 8.8
Table B.16 Sound Pressure Data for MCL055 at 10 ft. (3.05 m), dB
Sound Pressure at Distance = 10 ft (3.05 m), dB
Octave Band Data
A-Weighted, dBA
Frequency
(Hz)
Percent Fan Speed
Percent Fan Speed
20%
50%
80%
100%
20%
50%
80%
100%
63
36
55
61
66
9
29
35
40
125
37
53
62
73
21
37
46
57
250
37
51
62
69
29
42
54
60
500
42
49
63
68
38
46
60
65
1000
24
46
60
66
24
46
60
66
2000
18
40
56
64
19
42
57
66
4000
16
1
34
50
58
17
1
35
51
59
8000
15
1
28
45
52
14
1
27
44
51
Total
45
59
69
77
39
51
65
71
1
These values indicate the upper boundary limit due to background noise levels. Actual field values may be equal to or less than that listed.
Sound pressure level data used to develop this table was determined to be in accordance with AHRI Standard 220 and 270. Source: ASHRAE Fundamentals
2009, 8.8
Table B.17 Sound Pressure Data for MCL110 at 10 ft. (3.05 m), dB
Vertiv | Liebert® MC Installer/User Guide
82
Summary of Contents for Liebert MC series
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