Manual Hwam 4640 (page 41 of 48) (English, Danish, Swedish, Norwegian)

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Chimney

The chimney is the “engine” of the stove and it is crucial for the functioning of the woodburning stove.

The chimney draft provides a partial vacuum in the stove. This vacuum removes the smoke from the stove,

sucks air through the dampers for the so-called glass pane rinse which keeps the glass free of soot, and

sucks in air through both primary and secondary dampers for the combustion.

The chimney draft is created by the differences in temperature inside and outside the chimney. The higher

the temperature within the chimney, the greater the draft. It is crucial, therefore, that the chimney is warmed

up properly before closing the damper and limiting the combustion in the stove (a brick chimney takes

longer to warm up than a steel chimney). On days where the weather and wind conditions create insufcient

draught inside the chimney, it is even more important to warm up the chimney as quickly as possible. The

trick is to quickly get some ames going. Split the wood into extra ne pieces, use an extra relighter, etc.

If the stove has not been used for a longer period, it is important to check that the chimney pipe is not blocked.

It is possible to connect several devices to the same chimney. However, it is important to rst check the

applicable rules.

Even a good chimney can function badly if it is not used correctly. Similarly, a bad chimney may function

well if used correctly.

Chimney sweeping

To prevent the risk of chimney res, the chimney must be cleaned every year. The ue duct and the smoke

chamber above the bafe plate must be cleaned together with the chimney. If the chimney is too tall to

be cleaned from above, it must be equipped with a soot door.

In case of a chimney re, close all dampers and call the reghters. Before any further use, have the

chimney checked by the chimney sweeper.

FIrIng manual - wood

The lacquer will be fully hardened after the stove has been used, and the door and the ashpan should be

opened very carefully as there will otherwise be a risk that the gaskets will stick to the lacquer. In addition

the lacquer may initially give off an unpleasant odour, so make sure that the room is well ventilated. The

operating handles are located behind the extension beneath the door.

Tips about fuel

Approved fuel types

The wood burning stove is EN approved for combustion of wood only. It is recommended to use dried

chopped wood with a water content of a maximum of 18%. Stoking a re with wet wood results in soot,

environmental problems, and a less efcient fuel economy. It is recommended to purchase a hygrometer

to continuously check that the rewood has the correct moisture content before using it for ring.

Recommended wood types

All types of wood, for instance birch, beech, oak, elm, ash, conifers, and fruit trees can be used as fuel in your

wood burning stove. The great difference is not in the fuel value, but in the weight of the wood types per

cubic metre. Since beech weighs more per cubic metre than for instance common spruce, it will take more

common spruce to produce the same amount of heat that you would get from a cubic metre of beech.

Banned fuel types

It is not allowed to stoke a re with the following: printed matter, plywood, plastic, rubber, uid fuels,

and rubbish such as milk cartons, lacquered wood or impregnated wood or fossil fuels. The reason that

you should not apply any of the above is that during combustion they develop substances that are health

hazardous and harmful to the environment. These substances could also damage your wood burning stove

and chimney, rendering the product warranty void.

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Hwam 4640 Manual

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