Emission measurement Information about measurement
unsealed sleeve pipes. Otherwise, you can expect
smoke to escape into the boiler room as the boiler
heats up. The flue pipe must always be laid so that it
ascends towards the chimney.
Long horizontal flue pipes to the chimney must have a
narrow cross-section and above-average insulation (>
50 mm). Provide enough cleaning openings in the flue
pipe. A flue pipe to the chimney with a large cross
section would reduce the calculated required chimney
cross section. However, ash deposits will form at low
flow speeds, and the theoretically calculated flue
draught will be lost again.
With a large chimney cross-section, a maximum
straight length of the flue pipe up to half the effective
chimney height is possible (calculation required).
Insulate flue pipe to chimney
The flue pipe from the boiler to the chimney should be
insulated with at least 30 mm, preferably 50 mm, of
mineral wool to avoid temperature losses, which can
lead to a build-up of condensation.
Measurement opening for the emissions
measurement
Create a self-locking and sealing measurement
opening in the flue pipe for the emissions measure-
ment. The measurement opening must be
implemented in accordance with national directives.
Fig. 9-1: Measurement opening
The measurement opening must be created in the
vertical portion of the flue pipe. A straight section of a
suitable length must be present before and after the
measurement opening because, otherwise, turbulence
at the measurement points will prevent meaningful
measurements. The clearance from the boiler's flue
duct connection or from a pipe bend must be at least
twice the diameter of the flue duct.
Cleaning opening in flue pipe
Easily accessible cleaning openings must be available
for cleaning the flue pipe.
Fig. 9-2: Cleaning opening
9.1.3 Adjustable parameters
Setting the duration of the emission measurement
The duration of the emission measurement is
factory-set to 45 minutes. If necessary, this can
be increased with the [Service] access level. To do so,
switch to the text menu of the boiler. You can adjust the
duration as follows:
Boiler
Flue gas
Emission measure
MeasDuration
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