20
NOISE LEVELS
The noise levels refer to units operating in the nominal conditions (water temperature: inlet:
12°C - outlet: 7°C, Outdoor air temperature 35°C), due to a change of external air tempe-
rature noise levels may change to ensure proper functioning of the unit within operating
range.
The acoustic pressure levels are calculated 1/ 5 / 10 meters away from the outer surface of
the unit operating in the free field and resting on a reflecting surface (directional factor of 2).
SWL =
Sound power levels, with reference to 1x10
-12
W.
The
Total
sound power level in
dB(A)
measured in compliance with
ISO 9614
standards, is
certified accord
ing to the
Eurovent
certification program and it is the only mandatory value
(the values of octave band in the table are indicative).
SPL =
Sound pressure levels, with reference to 2x10
-5
Pa.
The sound pressure levels are values calculated by applying the
ISO-3744 relation
(Eurovent 8/1)
and refer to a distance of 1 meter away from the external surface of units
operating in the open field with directivity factor 2 (Q=2) and the units operating in nominal
conditions in the cooling mode.
AX Extra low noise unit
AS Low noise unit
AB Standard unit
Mod.
SWL (dB)
SPL (dBA)
Octave bands (Hz)
Total
63
125
250
500
1000
2000
4000
8000
dB
dB(A)
1m
5m
10m
50
89.4
87.0
84.8
80.3
77.4
73.8
65.3
56.0
93
83
65
56
51
60
89.4
87.0
84.8
80.3
77.4
73.8
65.3
56.0
93
83
65
56
51
70
91.2
88.9
86.4
82.3
78.0
71.6
64.0
55.6
94
84
66
57
52
80
91.2
88.9
86.4
82.3
78.0
71.6
64.0
55.6
94
84
66
57
52
90
92.2
89.9
87.4
83.3
79.0
72.6
65.0
56.6
95
85
67
58
53
100
92.2
89.9
87.4
83.3
79.0
72.6
65.0
56.6
95
85
67
58
53
115
92.2
89.9
87.4
83.3
79.0
72.6
65.0
56.6
95
85
66
58
53
130
92.4
90.0
87.8
83.3
80.4
76.8
68.3
59.0
96
86
67
59
54
145
94.2
91.9
89.4
85.3
81.0
74.6
67.0
58.6
97
87
68
60
55
160
94.2
91.9
89.4
85.3
81.0
74.6
67.0
58.6
97
87
68
60
55
180
92.4
90.1
88.6
86.0
83.2
77.8
71.2
62.8
96
88
69
61
56
200
92.4
90.1
88.6
86.0
83.2
77.8
71.2
62.8
96
88
69
61
56
Mod.
SWL (dB)
SPL (dBA)
Octave bands (Hz)
Total
63
125
250
500
1000
2000
4000
8000
dB
dB(A)
1m
5m
10m
50
83.4
86.3
82.6
77.8
74.3
67.8
59.2
50.3
90
80
62
53
48
60
83.4
86.3
82.6
77.8
74.3
67.8
59.2
50.3
90
80
62
53
48
70
84.4
87.3
83.6
78.8
75.3
68.8
60.2
51.3
91
81
63
54
49
80
84.4
87.3
83.6
78.8
75.3
68.8
60.2
51.3
91
81
63
54
49
90
85.4
88.3
84.6
79.8
76.3
69.8
61.2
52.3
92
82
64
55
50
100
85.4
88.3
84.6
79.8
76.3
69.8
61.2
52.3
92
82
64
55
50
115
85.4
88.3
84.6
79.8
76.3
69.8
61.2
52.3
92
82
63
55
50
130
89.4
87.0
84.8
80.3
77.4
73.8
65.3
56.0
93
83
64
56
51
145
91.2
88.9
86.4
82.3
78.0
71.6
64.0
55.6
94
84
65
57
52
160
91.2
88.9
86.4
82.3
78.0
71.6
64.0
55.6
94
84
65
57
52
180
92.2
89.9
87.4
83.3
79.0
72.6
65.0
56.6
95
85
66
58
53
200
92.2
89.9
87.4
83.3
79.0
72.6
65.0
56.6
95
85
66
58
53
Mod.
SWL (dB)
SPL (dBA)
Octave bands (Hz)
Total
63
125
250
500
1000
2000
4000
8000
dB
dB(A)
1m
5m
10m
50
89.0
81.0
80.0
76.0
72.0
67.0
62.0
52.0
90
78
60
51
46
60
89.0
81.0
80.0
76.0
72.0
67.0
62.0
52.0
90
78
60
51
46
70
90.0
82.0
81.0
77.0
73.5
67.0
64.0
52.0
91
79
61
52
47
80
90.0
82.0
81.0
77.0
73.5
67.0
64.0
52.0
91
79
61
52
47
90
83.4
86.3
82.6
77.8
74.3
67.8
59.2
50.3
90
80
62
53
48
100
83.4
86.3
82.6
77.8
74.3
67.8
59.2
50.3
90
80
62
53
48
115
83.4
86.3
82.6
77.8
74.3
67.8
59.2
50.3
90
80
61
53
48
130
84.4
87.3
83.6
78.8
75.3
68.8
60.2
51.3
91
81
62
54
49
145
85.4
88.3
84.6
79.8
76.3
69.8
61.2
52.3
92
82
63
55
50
160
85.4
88.3
84.6
79.8
76.3
69.8
61.2
52.3
92
82
63
55
50
180
89.4
87.0
84.8
80.3
77.4
73.8
65.3
56.0
93
83
64
56
51
200
89.4
87.0
84.8
80.3
77.4
73.8
65.3
56.0
93
83
64
56
51
Open field
Q=2
