8
6.4 Noise
Pressure-boosting systems are supplied with
different pump types and a variable number of
pumps, as listed under point 5.1. No specific over-
all noise level can therefore be listed here for all
variants of pressure-boosting systems. In the fol-
lowing overview, pumps of the standard series are
taken into account at a mains frequency of 50 Hz.
Rated power (kW)
0.37
0.55
0.75
1.1
1.5
1.85
2.5
Max. sound-pr
es
-
sur
e lev
el (*)
Lpa in [dB(A)]
1 pump
55
57
58
58
58
62
63
2 pumps
58
60
61
61
61
65
66
3 pumps
59.5
61.5
62.5
62.5
62.5
66.5
67.5
For motor powers not listed here and/or other
pump series, see the single pump noise value from
the installation and operating instructions for the
pumps or from the catalogue information on the
pumps. With the following procedure, it is possible
to approximate the overall noise level of the com-
plete system using the noise value for a single
pump of the type supplied.
•The installation surface must be horizontal and
level. A slight adjustment in height of the vibra-
tion absorber in the base frame may be necessary
to achieve stabilisation. If necessary, undo the
counter nut and unscrew or turn in the respective
vibration absorber slightly. Then re-tighten the
counter nut.
•The system is designed for a maximum ambient
temperature of +5 °C to 50 °C at a relative humid-
ity of 50%.
•Installation and operation in the vicinity of living
rooms and bedrooms is not recommended.
•To avoid the transmission of structure-borne
noise and to ensure a stress-free connection to
upstream and downstream pipes, compensators
with extension limiters or flexible connection pipes
must be used!
7
7.1
WARNING! Health hazard!
In the event of sound-pressure levels of above
80 dB(A), the operating personnel and persons
who are in the vicinity during operation must
wear suitable hearing protection!
Setup/installation
Installation site
•
The pressure-boosting system is installed in the
technical control room or in a dry, well ventilated
and frost-proof, separate room that can be locked.
•Adequately dimensioned floor drainage (drain
connection or similar) must be provided in the
installation room.
•No harmful gases may enter the room or be pres-
ent there.
•Ensure adequate space for maintenance work.
The main dimensions can be found in the supplied
installation plan. The system should be freely
accessible from at least two sides.
Calculation
Single pump
....
dB(A)
2 pumps, total
+3
dB(A) (tol0.5)
3 pumps, total
+4.5
dB(A) (tol1)
Overall noise level
....
dB(A)
Example (pressure boosting with 3 pumps)
Single pump
58
dB(A)
3 pumps, total
+4.5
dB(A) (tol1)
Overall noise level
62.5...63.5
dB(A)
Summary of Contents for ISAR MODH1 Series
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Page 21: ...21 NOTES...
