Raising The Flue Gas Temperature - Buderus Logano GE515 Installation And Maintenance Instructions Manual

12 System start-up

12.5 Raising the flue gas temperature

Depending on boiler size and setup (related to the rated
output), the flue gas temperature of a new boiler with a
boiler water temperature of 80 °C is approx. 160 –
180 °C.
The flue gas temperature is correspondingly lower in a
two stage operation.
If necessary, you may increase the flue gas temperature
further by individually removing hot gas check plates or
hot gas baffle plates.
USER NOTE
When taking these steps you should
consider changes in the hot gas check
plates as a last option, since a reduction in
the size of the hot gas check plates is
irreversible.
Shut down the boiler in accordance with operating
instructions.
The flue gas temperature can be raised through the
following measures.
12.5.1 Removing hot gas baffle plates
For boiler size 7–11 (240–455 kW), the flue gas
temperature can be raised by removing top or bottom
hot gas baffle plates in pairs.
12.5.2 Removing hot gas check plates
You can significantly raise the flue gas temperature by
removing hot gas check plates.
Remove the Allen screws inside each hot gas check
plate and remove the l.h. and r.h. hot gas check
plates (Fig. 68, [1] and [2]).
52 Logano GE515 - We reserve the right to make any changes due to technical modifications.
2
1
Fig. 68 Location of the hot gas check plates