2.4 Permitted uses
The Froling Firewood boiler S4 Turbo is designed solely for heating domestic water.
Only use fuels specified in the "Permitted fuels" section.
⇨ See "Permitted fuels" [page 10]
The unit should only be operated when it is in full working order. It should be operated
in accordance with the instructions, observing safety precautions, and you should en‐
sure you are aware of the potential hazards. The inspection and cleaning intervals in
the operating instructions should be observed. Ensure that any faults which might im‐
pair safety are rectified immediately.
The manufacturer or supplier is not liable for any damage resulting from non-permitted
uses.
2.4.1 Permitted fuels
Firewood
Firewood up to max. 55 cm long.
Water content (w) greater than 15% (equivalent to wood moisture u > 17%)
Water content (w) less than 25% (equivalent to wood moisture u < 33%)
EU: Fuel acc. to EN 14961 - Part 5: Firewood class A2 / D15 L50
Germany
also:
Fuel class 4 (§3 of the First Federal Emissions Protection Ordinance
(BimSchV) in the last amended version)
▪ Values in practice:
- Hardwood: 2 years in dry storage
- Soft wood: 1 year in dry storage
▪
Store stacks of split wood sheltered from the rain
▪ Create a dry underlay, where possible with air access (line with round timber, pallets,
etc.)
▪ Use wind-exposed areas where possible for storage (e.g. store at edge of forest instead
of in forest)
▪ Walls of buildings facing the sun are ideal
▪ If possible, stock fuel for the day in a warm place (e.g. in boiler room) (pre-heats the
fuel!)
NOTICE! Use fuels that are consistent in size and water content.
NOTICE! Burning extremely dry fuels (w < 15%) may require repairs by qualified staff.
Please contact Froling customer services or your installer.
Water content
Note on standards
Tips for
storing wood
2
Safety
Permitted uses
10 Froling GesmbH | A-4710 Grieskrichen, Industriestraße 12 | www.froeling.com
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