M23740N6-03 01/10/07
page
35
SOUND LEVELS
Sound Power Level (dB)
Octave band (Hz)
Size
63 125 250 500 1000 2000 4000 8000
Sound
pressur
e level
dB(A)
Sound
power
level
dB(A)
31
75 70 59 61 56 56 47 36
48
63
41
73 74 62 62 57 57 49 38
49
65
51
74 75 62 63 59 59 52 41
50
66
71
76 73 66 63 62 56 57 53
51
67
91
81 78 69 66 62 61 53 44
53
69
101
84 80 72 68 65 65 57 48
56
72
121
87 82 74 70 67 67 60 51
58
74
142
85 86 71 70 67 66 58 48
58
75
182
87 87 73 73 70 69 62 53
60
77
202
89 89 76 75 72 71 64 55
62
79
The sound levels refer to the unit at full
load, in the rated test conditions and with
available head of 30Pa. The sound
pressure level refers to unit with ductable
supply and it is measured at a distance
of 1m from the external surface of the
units.
242
92 92 78 77 74 74 66 58
64
81
Hot water coil pressure drop: AIR side
Q l/s
0
10
20
30
40
50
60
70
80
90
0
500
1000
1500
2000
2500
dP
P
a
31
41- 51
101-121
91
71
Q l/s
dP
P
a
0
10
20
30
40
50
60
70
80
2000
2500
3000
3500
4000
142-182
202-242
Q = AIR FLOW
DP = PRESSURE DROP
Hot water coil pressure drop: WATER side
Q l/h
dP
k
P
a
0
10
20
30
40
50
60
70
80
90
0
1
2
3
4
5
6
31
41-51
71
0
10
20
30
40
50
60
70
80
0
2
4
6
8
10
12
Q l/h
dP
kP
a
91
101-121
142-242
Q = AIR FLOW
DP = PRESSURE DROP
