DE DIETRICH CBI-II _ CBB 15 E - Manual (Page 4)

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CBI-II / CBB 15 E 16/06/2009 - 300019729-001-C
2. Important recommendations
2.2 Maintenance
- The boiler must be serviced and fully cleaned and the flue gas
conduit swept by a qualified professional at least 2 times per year.
- We recommend taking out a maintenance contract.
- The boiler must be cleaned every 3 to 7 days.
- Check the seal on the boiler doors 1 time per month.
- Regularly check the level of water in the system and top up if
required, taking care that cold water is not added suddenly into the
boiler when it is hot. If this operation is repeated several times per
season, locate the leak and repair it.

Do not drain the installation, except in cases of absolute
necessity. For example: Several months' absence with the
risk of ice in the building.
2.3 Fuel
Use
- Broad-leaved hardwood (oak, beech, hornbeam, etc.)
- Broad-leaved softwood (birch, poplar, lime, etc.)
- Resinous wood (pine, fir, spruce, larch, etc.): To be used
occasionally (2 to 3 loads maximum and follow with the same
number of hardwood and softwood loads)
• Characteristics of logs that can be used
- Dry wood, stored under cover (for at least 2 years), with a low
humidity level (less than 20% of the gross mass)
- Logs with a maximum diameter of 150 mm
- Maximum length of the logs:
- For improved combustion quality, prefer shorter logs (25 - 33 cm)
split into cross-sections with a maximum diameter of 10 to 15 cm.
- For more regular combustion, better boiler autonomy and
improved annual efficiency, arrange the logs in an orderly manner
in the combustion chamber.
• Calorific power and energy content of various types of wood
• Equivalent between storage volume requirements
Fuel oil: 2000 l F 2 m 3 (1 m x 1 m x 2 m)
= 15 stere of logs F 15 m 3 (3 m x 2.5 m x 2 m)
Multiplied by 2 for storage over 2 years
(Drying of freshly cut wood)
Do not use
- Chipboard panels
- Coated, painted or treated wood
- Wood containing pieces of metal
- Wood not stored under cover for at least 12 months
- Any fuel other than wood
Model CBI-II 20 CBI-II 30 CBI-II 40 CBB 15 E
mm 330 530 530 330
Type of wood
Broad-leaved
hardwood
Broad-leaved
softwood and
conifers
Gross humidity
(%)
20 30 20 30
Average weight of a
stere of wood
(kg/stere)
530 600 380 440
Calorific power
(kWh/kg)
3.9 3.3 3.9 3.3
Energy content
(kWh/stere)
2070 1980 1480 1450
Equivalent in litres of
fuel oil
(l/stere)
210 200 150 145