Boiler Maintenance
Cleaning and Maintenance
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4.3 Instructions for Measuring Emissions
U Clean the system 2 – 5 days before the measurement
U Use fuel that the system is set up for
U Do not make any changes to the system before the measurement (up to approx. 10 minutes
prior) (Open the doors, ..)
U During the measurement, the boiler must be at least half full and a bed of embers must be
present
U The boiler temperature must be > 60 °C, the flue gas temperature must be > 160 °C
U CO
2
values should be between 10 – 14%
U Conduct a partial load measurement (for systems without a storage tank lt. BimSchV.
obligation)
U Partial load operation is evident from the flue gas temperature
´ Conduct a partial load measurement at the beginning or at the end of the emissions
measurement!
U Throttle the heat emission during the measurement
Under no circumstances should you shut down the fan or reduce its speed!
Typical values
Boiler variants without heat-exchanger technology with heat-exchanger technology
Operating phase Rated load Partial load Rated load Partial load
Flue gas temperature [°C] 190 – 220 150 – 180 160 – 190 130 – 160
CO
2
– value [%] 12 – 14 10 – 14 12 – 14 10 – 14
CO [mg/Nm³]
relative to 13% O
2
100 – 1000 100 – 1000 100 – 1000 100 – 1000
Dust [mg/Nm³]
relative to 13% O
2
50 50 50 50
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