iDM AERO ILM 2-7 Technical Documentation Installation Instructions page 23

Relevant place of Immission
The sound immission have to be determined 0.5 m
in the middle in front of the open window (outside the
ticular protection. According DIN 4109:1989 rooms
needing particular protection are:
• living- and bed rooms
• children rooms
• classrooms/seminar rooms
Rating level Lr
The rating level corresponds to an equivalent conti-
period. The rating level is determined for both rating
periods „day" (6am-10pm) and „night" (10pm-6am)
separately. The operation time of the heat pump has
particular impact on the resulting equivalent conti-
nuous sound pressure level. Reducing the operation
time from 16 h per day to 4 h per day the rating level
is reduced by 6 dB(A).
But the equivalent continuous sound pressure level
disruptive, if individual tones are clearly discernable
or the noise is irregular (impulsiveness). These noise
characteristics will be taken into account by applying
a surcharge. Additionally, daytimes with increased
sensitivity are taken into consideration. According the
„TA Lärm" the following corrections are applied:
information incorporation
impulsiveness
daytimes with increased
sensitivity
The rating level Lr shall be obtained by summing the
calculated immission level and the applied correc-
(C) IDM Energiesysteme GmbH
Finally, the determined rating level can be compared
with legal limit values (e.g. „TA Lärm").
.
Standard Immission Values (SIV) - relevant place of
- immission outside the building:
Territory
Industrial area
business park,
commercial areas
village areas and mixed
areas
settlement area
residential area
spa area, hospitals
.
In case of sound propagation inside buildings or
structure-borne sound transmission the Standard Im-
mission Values for the rating level of rooms needing
particular protection are as following:
SIV - day:
SIV - night:
For the calculation of the rating level according „TA
Lärm" a calculation tool is provided at the homepage:
http://www.idm-energie.com
-
Tips for the installation of heat pumps
possible
• The installation on acoustically hard ground and
areas with depression in the terrain should be
avoided
• The distance from the heat pump and the relevant
place of immission should be as big as possible
0.3 or 6 dB
• In case of outdoor installation the blow out of air
0.3 or 6 dB
in direction to the neighbour or relevant receiver
6 dB
location should be avoided
pressure levels accordingly.
Installation instructions AERO ILM
SIV-day
70 dB(A)
65 dB(A)
60 dB(A
55 dB(A)
50 dB(A)
45 dB(A)
35 dB(A)
25 dB(A)
Installation
SIV-night
70 dB(A)
50 dB(A)
45 dB(A)
40 dB(A)
35 dB(A)
35 dB(A)
23