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Noise emission
Information for installation
be removed from the valves (hang on the valve with a
wire), to ensure that they cannot be closed inadver-
tently.
7.7
Noise emission
Airborne noise emission
In normal operation, the airborne noise emissions from
a pellet or wood chip boiler is between 40 and 50 dB(a)
with individual peaks of up to 75 dB(a) (ignition fan and
pellets vacuum motor).
To limit airborne noise emissions, the usual measures
that are required for all boiler rooms are sufficient:
•
Heavy doors such as the legally prescribed fire
doors
•
Restriction of the air intake openings to the
required minimum
•
Sound absorption insulation in the floors of the
rooms above
Structure-borne noise
Noise problems with pellet or wood chip boilers are
primarily caused by structure-borne noise emissions,
that is from the noise energy that is introduced into the
building. The main structure-borne noise emission
sources and required damping measures are listed in
the following.
•
Squeaking and creaking of the fuel conveyor
screws:
Squeaking and creaking from the fuel conveyor
screw depends on the fuel used, which is why the
volume can have a wide range. Even if these noise
sources are negligible in 90% of systems, without
measures to counteract structure-borne noise
transmission, the limit value of 30 dB(a) (for
domestic technical systems) can be exceeded in
the adjacent living rooms for 10% of systems. For
this reason, cover the screw in the wall opening
with mineral wool to prevent noise being
introduced into the wall. In the same way the store
room should be set up on a floating screed to
acoustically decouple the conveyor from the
building.
•
Chimney noises through the draught fan:
For chimney noises through the draught fan, a soft
integration (for example with a ceramic cord) of the
flue gas conduit is used in the chimney connector
for soundproofing.
•
Natural resonance of the chimney:
The natural resonance of a chimney occurs if the
chimney emits a certain frequency from the boiler
(pipe organ effect). As soundproofing for brick-built
chimneys, additional insulation and sealing of the
cleaning aperture helps. For metal chimneys,
additional wall consoles attached to the walls can
help.
•
Noise emission through heat exchanger
cleaning of the boiler:
For soundproofing, blocking de-ashing during
night hours with the time programme available on
the controller helps. So does a floating screed in
the boiler room and setting up the boiler on the
ETA sound-insulation set. Design the rigidly
connected installation (flow and return, thermal
emergency cooling valve) so that introduction of
noise into the wall is minimised.
Summary of Contents for 13180 LP-D
Page 1: ...2020 04 21 EN 0000000475 V 006 5402 00 939091 002 Pellet boiler ePE K 180 240 kW Installation ...
Page 33: ...Buffer storage tank Connection between multiple buffer storage tanks 33 ...
Page 55: ...Installation Network connection 55 ...
Page 61: ...Electrical connections Overview of circuit boards 61 ...
Page 65: ...Electrical connections Circuit board HA C5 65 ...
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Page 86: ...www eta co at ...
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Page 88: ...www eta co at www eta co at downloads DOWNLOAD ...