eta 13180 LP-D, Installation Manual

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Information for installation Chimney
21
Connection to the sewage system for the chimney
For the condensate in the chimney, a connection to the
sewage system (e.g. duct) with at least DN25 via a
siphon is required. The sewer pipe to which the con-
densation drain pipe is connected should be flushed
once a year.
Fig. 7-3: Condensate drain
For chimneys on the outer walls (made of
stainless steel, for example), frost-proof run-off
must be provided for the condensate water.
Insulate the connecting pipe to the chimney
The connection between the boiler and the chimney
should be insulated with at least 30 mm, preferably 50
mm, of mineral wool to avoid thermal losses, which
can lead to a build-up of condensation.
Prevent structure-borne noise
To prevent structure-borne noise as far as possible,
there should not be a fixed connection between the
flue pipe and the chimney. Good flue systems are
acoustically isolated. When steel pipes are connected
to a fireclay chimney, ceramic fibre bandages have
proven effective at preventing structure-borne noise as
well as damage to the refractory sleeve.
Cleaning aperture in the connecting pipe
Easily accessible cleaning apertures must be available
for cleaning the flue pipe.
Fig. 7-4: Cleaning aperture
Fit the chimney connection just under the ceiling
Even if the current boiler can be connected to the
chimney at a low height, it is better if you fit the
chimney connection just below the ceiling. The flue
pipe is easier to install, and the vertical connecting pipe
is long enough for an emission measurement.
A second chimney connection below the first one
enables simple installation of a draught limiter, if
this is required.
Opening for the emission measurement
A self-locking and sealing measurement opening must
be provided in the flue pipe to facilitate emission mea-
surements. The measurement opening must be
designed in accordance with national directives.
Deflagration damper
The boiler is designed with safety routines in the
control system to prevent deflagrations. So for a boiler
output up to 50 kW no deflagration damper (also often
called a blowback flap) is required if the connecting
pipe is short and ascends to the chimney.
Fig. 7-5: Example: deflagration damper with draught limiter
From 60 kW boiler output, we recommend using an
deflagration damper. From 100 kW boiler output, an
deflagration damper is required. While the most that