5.2 Initial startup
5.2.1 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.
5.2.2 Fuels permitted under certain conditions
Wood briquettes
Wood briquettes for non-industrial use with a diameter of 5-10 cm and 5-50 cm long.
EU:
Fuel acc. to 14961 - Part 3: Wood briquettes class B / D100 L500
Form 1 - 3
Additional for
Germany:
Fuel class 5a (§3 of the First Federal Emissions Protection Ordinance
(BimSchV) in the last amended version)
Water content
Note on standards
Tips for
storing wood
Note on standards
Start-up
5
Initial startup
Installation Instructions S3 Turbo | M1080813_en
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