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 Pa
31
41- 51
101-121
91
71
Q l/s
dP Pa
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 kPa
0
10
20
30
40
50
60
70
80
90
0123456
31
41-51
71
0
10
20
30
40
50
60
70
80
024681012
Q l/h
dP kPa
91 101-121
142-242
Q = AIR FLOW
DP = PRESSURE DROP
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