Noise Development - Viessmann VITOCAL 200-S AWS Technical Manual

Design information
(cont.)

4.4 Noise development

c [dB(A)]
b [dB(A)]
a [dB(A)]
1 m
A
A External unit of the heat pump
Sound pressure level at different distances to the appliance
Sound power level L Directivity
W
Q
*1
in dB(A)
Type AWS/AWS-AC 104
2
60 4
8
Type AWS/AWS-AC 107
2
62 4
8
Type AWS/AWS-AC 110
2
62 4
8
Type AWS/AWS-AC 113
2
63 4
8
Note
In practice, actual values may differ from those shown here due to sound reflection or absorption as a result of local conditions.
For example, the situations described by Q=4 and Q=8 often only give an inaccurate picture of the actual conditions at the emission site.
Measures to reduce noise emissions
■ Never position the heat pump directly next to living rooms, bedrooms
or their windows.
■ On pipe inlets in ceilings and walls, use suitable insulating materials
to prevent the transmission of structure-borne noise (see also the
information regarding installation of the internal unit from page 43).
■ Never install the heat pump in the immediate vicinity of neighbouring
buildings or properties (see also the information regarding installa-
tion of the external unit from page 40).
*1 Weighted total sound power level with reference to ISO 13261-1.
These measurements were taken in a semi-free field under the following conditions: A 23 °C ± 3 °C, W 53 °C ± 2 °C
*2 Determined by calculation (in accordance with formulae; see separate technical guide "Heat pump principles") on the basis of the actual
effective total sound power level.
VITOCAL 200-S
Note
The requirements specified in TA Lärm [Germany] must always be
observed.
Sound pressure levels a, b, c in dB(A), measured at different dis-
tances (semi-free measurement, Q=2) at a fan rating of 80 to
100 %
External unit type AWS/AWS-AC
a in dB(A)
b in dB(A)
c in dB(A)
5 m 10 m
Distance from the heat pump in m
1 2 4
Sound pressure level L
52 46 40
55 49 43
58 52 46
54 48 42
57 51 45
60 54 48
54 48 42
57 51 45
60 54 48
55 49 43
58 52 46
61 55 49
■ The sound pressure level can be raised by installing the heat pump
in unfavourable physical positions.
104
52
38
32
5 6 8 10
*2
in dB(A)
P
38 36 34 32
41 39 37 35
44 42 40 38
40 38 36 34
43 41 39 37
46 44 42 40
40 38 36 34
43 41 39 37
46 44 42 40
41 39 37 35
44 42 40 38
47 45 43 41
107 110 113
54 54 55
40 40 41
34 34 35
4
12 15
30 28
33 32
36 35
32 30
35 34
38 37
32 30
35 34
38 37
33 31
36 35
39 38
VIESMANN
47