Handleiding Dik Geurts Lars 900 (pagina 24 van 64) (Nederlands, Duits, Engels, Frans)

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USER MANUAL

5. Burning instructions and tips

Below you will find tips and instructions that are important for a good operation of your fire.

5.1 Fuel

Good fuel is the ‘engine’ of your fire. You will benefit the most from your fire, if you burn it with high quality, well

dried wood or wood briquettes. In this way you will prevent unwanted additional effects like excess smoke

formation as a result of poor combustion, insufficient heat yield and poor efficiency. The fire is only suitable to be

filled with clean wood or wood briquettes.

Wood is usually purchased in cubic metres. However, there are many types of ‘cubes’ available on the market:

• A genuine cube (neatly stacked sawn and split wood): 1.0 m

(approx. 700 kg).

• A bulk cube (wood loaded in 1 m3 trays): 0.6 m

(approx. 400 kg).

• A stere (neatly stacked one metre sections): 1.3 m

(approx. 900 kg).

Dry wood

Wood must be properly dry. Freshly felled wood is not suitable, as it contains too much moist (approx.

60%). Oven-dried wood, on the other hand, is suitable. Therefore, you should allow the wood to dry for at least one

year, and preferably for two to three years. The wood will dry if you store it outside under a lean-to (i.e. not in the

garage), preferably in a sunny location. This will allow the wind (but not the rain) to get to it. Short, split stems will

dry the quickest. After drying, they only contain 15 to 20% moist and will provide the highest output.

!Tip

Dry wood will generate a bright sound when you hit two blocks together. At the front side there will be shrinkage

cracks and the bark will come loose easily.

We recommend using a moisture gauge to measure the moist percentage of the burning wood. It will be available

at your supplier.

In order to determine the moist percentage correctly, please pay attention to the following:

• First allow the burning wood to reach room temperature.

• Always measure in the core of the wood block.

• This is why you should always cleave a wood block through the middle first.

• Press the moisture gauge's measuring pinsdiagonally on the grain,uprightandfirmly in the middle of the

freshly cleaved surface.

There is no point in measuring at the cross-cut of the wood or parallel to the grain.

• The measurement provides an indication. In order to get a more accurate picture, the measurement should be

repeated on several places (and perhaps on various wood blocks).

• The burning wood may have a maximum moist percentage of 20%. If the wood is too dry, i.e. below a moist

percentage of 10%, it will quickly gasify and overloading could occur, particularly in the case of lighter wood

types.

5.1.1 Amount of wood

You must observe the recommended volume of wood blocks (number AND dimensions) provided in Appendix 1,

Table 2. When a larger volume is used, the heat delivery will increase. In that case, the fire could get overloaded, as a

result of which parts could get damaged and/or the walls of the fire will discolour. The glass pane could also

blacken sooner. If the fire is burning too hard, you should use coarser/harder wood.

Always heat the appliance to capacity. Gross, 1 kg of dry burning wood will supply approx. 4 kWh (kilowatt hour) of

energy. For example: for an appliance with a capacity of 4-8 kWh, you must add 1-2 kg of firewood every 45

minutes.

The capacity of your fire can be seen in the installation manual in appendix 2 and on the data plate.

5.1.2 Suitable types of wood

The following types of wood are recommended for burning your fire:

• Hard types of wood such as oak, beech, hornbeam, ash and fruit tree wood. These types of wood generate a

short flame and will burn longer.

• Light types of wood such as birch, poplar, willow and alder. These types generate a long flame but burn up

rather quickly.

• Wood briquettes (compressed wood chips) are not to be burnt in a smoke control area.

!Caution

Coniferous or pine wood. This wood should only be used in a well burning fire, because otherwise you will get

deposits in the flue duct. It is not really suitable for open fires, because of the sparks. Pine is often used as kindling

wood.

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