Additional Devices For Sound Insulation; Requirements; Flue Gas Silencer; Burner Silencer Hoods - Bosch UT-L 1 Technical Manual

10.5

Additional devices for sound insulation

10.5.1

Requirements

The necessity and scope of measures for sound
insulation are based on the sound pressure level and the
noise disturbance this causes. Bosch offers three sound
insulation devices that are specially matched to the
UNIMAT UT-L boiler. They can be supplemented with
additional on-site sound insulation measures.
On-site measures include providing sizing and
installation information to attenuate structure-borne
noise, compensators in the connection lines and flexible
connections with the building. The devices for sound
insulation require extra space, which should be factored
in at the planning stage.
The use of sound insulation measures depends on the
purpose of the building and the requirements made of
adjacent rooms and the surrounding area.
10.5.2

Flue gas silencer

A large proportion of the noise caused by combustion
can be transferred via the flue system to the building.
Specially adapted flue gas silencers can significantly
reduce the sound pressure level.
10.5.3

Burner silencer hoods

The airborne noise created by the burner during
operation can be attenuated with a burner silencer
hood.
When designing the installation room, allow extra space
to remove the silencer hood.
Bosch offers burner silencer hoods matched to the
relevant project. The space required, dimensions and
attenuation values are available on request.
UNIMAT
10.5.4 Boiler mounts to attenuate structure-borne
noise
Boiler mounts to attenuate structure-borne noise can be
used to prevent the transmission of structure-borne
noise to the foundation and the building. To achieve the
required attenuation, the boiler installation surface must
be perfectly even (foundation dimensions  page 78).
When designing boiler mounts to attenuate structure-
borne noise, bear in mind that the installation height of
the boiler and therefore the position of the pipework
connections can vary. To compensate for the spring
deflection of the boiler mounts and to minimise sound
transmission via the water connections, we also
recommend installing pipe compensators in the heating
water pipe.
The boiler mounts to attenuate structure-borne noise
must be designed for the boiler in question.
The vibration dampers are no longer positioned right
under the supports. Instead, the vibration dampers are
positioned as strips, as they work best with a certain
spring compression. Insulation strips are therefore
supplied as required for the order.
B
1
Fig. 54 Boiler mounts to attenuate structure-borne noise
for UNIMAT UT-L boilers (example illustration)
Fitting | 77
B
2
B
2
L
6 720 642 347-68.1il
6 720 807 794 (2013/04)