eta PelletsCompact PC33, Руководство по установке

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Noise emission Information for installation
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 dBA (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 pipe 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 openings helps. For metal chimneys,
additional wall consoles attached to the masonry
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 control system 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 masonry is minimised.