Regulations and operating conditions
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37
6 720 807 794 (2013/04)
UNIMAT
5.2.2
Information on flue gas tests pursuant to
BImSchV/TA Luft
First tests or system tests following major
modifications
In the case of systems that have not yet been tested,
have not been tested successfully or have been modified
since testing, we recommend conducting sample tests
at least two months before the planned inspection date.
This procedure should enable any necessary action to be
taken with regard to the combustion equipment in order
to adhere to the specified emissions levels. A Bosch
customer service engineer can be requested to perform
these advance tests; based on the test results, this
engineer will also be able to make suggestions on how
to adhere to the legal levels.
Repeat tests on systems
In the case of systems on which a test has already been
carried out in accordance with BImSchV/TA Luft,
depending on the size and controllability of the
combustion system, it is generally sufficient to make
adjustments either on the day of the official test in the
presence of the testing engineer, or for larger and more
complex systems with several fuel types, one or two
days before this test.
Preparing the system
For the tests to be conducted successfully, it is
necessary to ensure sufficient load reduction, so that
constant operation under steady conditions is possible.
If this cannot be guaranteed, for example due to the
weather in the case of heating systems, we recommend
postponing the test until it can be carried out without
interruption.
Fuels
The fuels to be burned must comply with the notice of
approval and be available in the quality determined for
the system. Since the level of nitrogen in light fuel oil has
a significant effect on the formation of NO
x
, the nitrogen
content of light fuel oil must be known in order to assess
the NO
x
test levels. The fuel oil supplier may be able to
provide this information for the relevant deliveries. To
calculate this value precisely, take an oil sample (1 litre)
from the tank in question at the time of the emissions
test. A test lab can determine the nitrogen content of the
fuel.
Cleaning the boiler
We recommend cleaning the boiler combustion chamber
thoroughly at least one or two days before the test.
Conducting the test
A Bosch customer service engineer should be requested
to conduct the test. If levels exceeding the limits are
registered during the test, it may be possible to modify
the combustion settings so that the test can be
conducted again with success.
Support personnel should be available to assist.
A table and chair should be prepared in the boiler room
for the testing engineer to complete the test reports.
5) CO and NO
X
levels relative to 3 % O
2
content. Half hour average acc. to para. §11(1). Three individual tests (low/medium and full) are
to be carried out in acc. with para. 18(4). With fuel oil EL, the NO
X
levels are relative to a nitrogen content of 140 mg/kg in acc. with
para.11(1).
6) The relevant saturated steam operating pressure levels are given in brackets
7) The tests must be carried out by a test body recognised by para. 26 of the BImSchG.
