10
Subject to change without notice | 83061500aUK – Translation into English of the original German operating manual | ait-deutschland GmbH
SOUND
The noise emission from the heat pumps must be taken in-
to account in the respective installation plans for air / wa-
ter heat pumps. The respective regional regulations must be
complied with.
NOTE.
The following sound pressure levels are calculated
values. Other constellations, adjoining other buil-
dings or even reflecting surfaces may lead to a le-
vel increase. An exact specification of each sound
pressure level is possible only through a measure-
ment spot when the heat pump is already installed.
The following sound pressure levels result, depending on the distance and installation variant with directivity factor Q (see
sketches):
LW 161
H-A/V
Distance from the heat pump in m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Directivity
factor
Sound pressure level at max. heating output in dB(A)
Q
2
55
49
45,5
43
41
39,4
38,1
36,9
35,9
35
34,2
33,4
32,7
32,1
31,5
30,9
30,4
29,9
29,4
29
4
58
52
48,5
46
44
42,4
41,1
39,9
38,9
38
37,2
36,4
35,7
35,1
34,5
33,9
33,4
32,9
32,4
32
8
61
55
51,5
49
47
45,4
44,1
42,9
41,9
41
40,2
39,4
38,7
38,1
37,5
36,9
36,4
35,9
35,4
35
The directivity factor Q for the different installation vari-
ants:
Q = 2
Q = 4
Q = 8
In case of 2 or more units of the same heat pump type, the
respective level increase must be added to the correspon-
ding sound pressure level from the following table
Number of n equally
loud sound sources
Level increase
∆ L
in dB
1
0,0
2
3,0
3
4,8
4
6,0
5
7,0
6
7,8
7
8,5
8
9,0
9
9,5
10
10,0
12
10,8
In case of different, not equally loud units, the level increase
is read off the following diagram:
Le
vel incr
ease in dB
Level difference in dB
