Fuel table
The table below shows a selection of wood types with the corresponding energy
content depending on the water content:
Wood type Energy content with water content [kWh/kg]
w = 15% w = 20% w = 25%
Spruce 4.3 4.0 3.7
Pine 4.3 4.0 3.7
Beech 4.1 3.8 3.5
Oak 4.1 3.8 3.5
Fill level in boiler
The table below shows the relationship between fill level and weight. It compares
beech (example of hardwood) and spruce (example of soft wood) with a water content
of approx. 20%. Using our example above with beech, the fill level of an S3 Turbo 40
would, therefore, be approx. one third.
Fill level Weight at fill level
S3 Turbo 20/30 S3 Turbo 40/45
3/3 Beech approx. 40 kg approx. 65 kg
Spruce approx. 24 kg approx. 39 kg
2/3 Beech approx. 27 kg approx. 43 kg
Spruce approx. 16 kg approx. 26 kg
1/3 Beech approx. 13 kg approx. 22 kg
Spruce approx. 8 kg approx. 13 kg
Reloading intervals when operating without storage tank or if the storage tank is too
small
NOTICE
Feed based on output:
Only replenish the fuel if energy is needed!
❒
If too much fuel is loaded, the boiler drops below its minimum output limit and
goes over to "constant burn" operating status (blower fan switches off)
➥ The level of efficiency drops in constant burn mode, the emissions
increase and the boiler can tar up (pitch formation!)
3
Operating the system
Heating the boiler
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