Tip: Line the first 20 cm of the fuel loading chamber with short split wood (edge length
EL < 10 cm). This reduces the time taken for a bed of embers to form.
NOTICE! The smaller the wood is cut, the faster a bed of embers forms
Once the bed of embers has fully formed, the combustion air can be readjusted if
necessary after measuring the O
2
content:
Setting the primary air
The nominal output of the boiler is set via the primary air and adjusted to the fuel
used.
Combustion air
Effect
Setting
More primary air
Higher flue gas temperature,
greater output
Rotate manual controller clockwise
("plus" direction)
Less primary air
Lower flue gas temperature,
lower output
Rotate manual controller counter-
clockwise ("minus" direction)
❒ Correct the air flap for primary air (upper air flap) to reach the required flue gas
temperature
⇨ See "Boiler data for planning the flue gas system" [page 15]
❒ Once the manual controller has been correctly set, secure it in that position
Setting the secondary air
The secondary air sets the O
2
content of the flue gas and thus the quality of
combustion.
Combustion air
Effect
Setting
More secondary air
Greater O
2
content
Rotate manual controller clockwise
("plus" direction)
Less secondary air
Lower O
2
content
Rotate manual controller counter-
clockwise ("minus" direction)
❒ Correct the air flap for secondary air (lower air flap) to reach the required O
2
content
NOTICE! The manual controller should be set so that the O2 content is between 7 and
9%.
❒ Once the manual controller has been correctly set, secure it in that position
After starting up for the first time and once the combustion air has been set, the boiler
is optimally set to the fuel used.
For further use of the boiler, please note the following:
❒ Use fuels that are consistent in size, type and water content
Start-up
5
Initial startup
Installation Instructions S3 Turbo | M1081217_en
63
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