Handleiding Morso 6890 (pagina 14 van 21) (Engels, Deens)

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1.9 Draught

If smoke comes out of the stove when the re door is opened, it will be due to the poor draught

in the chimney. This type of stove requires at least 12 PA of chimney draught to achieve satis-

factory combustion and to prevent smoke from escaping. Smoke may, however, escape in any

event if the stove door is opened during vigorous ring, so this should be avoided.

The ue gas temperature at the rated output is 281°C relative to 20°C.

If in doubt, you may want to get your chimney sweep to measure the draught in the chimney.

Draught

The draught in the chimney is the result of the dierence between the high tempera-

ture in the chimney and the cooler temperature outside. Other factors that determine

whether sucient negative pressure can be produced to create a draught include the

length and insulation of the chimney, and wind and weather conditions.

The draught will be reduced when:

- The temperature dierence is too low, e.g. in connection with a poorly insu-

lated chimney.

If the chimney is cold, it may help to light (burn up) a rolled-up newspaper in

the chimney’s cleaning door.

- The outside temperature is too high, e.g. during the summer.

- There is no wind.

- The chimney is not tall enough, with the result that it sits in the lee of the roof

surface or tall trees.

These conditions are also associated with the greatest risk of smoke coming

back down the chimney.

- Air is entering the chimney in undesired places, e.g. through cracked joints or

leaks in the cleaning door or the ue pipe.

- Unsealed, unused replaces are connected to the chimney.

- The ue pipe and chimney are clogged up with soot due to inadequate cleaning.

- The house is too tightly sealed (please see the section on Fresh air supply).

A good draught is achieved when:

- There is a big dierence between the temperature in the chimney and outside,

i.e. when the need for heating is greatest.

- The weather is clear and there is a good wind.

- The chimney is of the proper height, i.e. Minimum 4 metres above the stove,

and clear of the spine of the roof.

2.0 Firing/using the stove

Your stove is constructed with air inlets in two places.

Pre-heated, fast-moving combustion air is added to the re above the glass window, and is

regulated using the handle above the door. The combustion air is let in when the handle is

pushed to the right, and shut o when the handle is pushed to the left.

Another air inlet provides constant, pre-heated air supply which cannot be adjusted, and which

comes into the combustion chamber just above the re. This helps burn o the last few gasses

emitted by the wood while it is being heated.

The stove’s rated heat output is 5,0 kW.

Your new Morsø stove is EN-tested for ring with wood, and is suitable for intermittent use.

NB!

Wood is a material that contains a great deal of gas (approx. 75%). The gases are released

when the wood is lit and heated. For this reason, it is important that these gases are ig-

nited quickly after stoking. If the wood just lies smouldering, especially after re-stoking,

a lot of smoke is created which, in the worst case, may cause an explosive ignition of the

gases, resulting in damage to the stove.

In order to ignite the gases that are released from the wood, and to keep clear, lasting

ames during the combustion process, it is important to let in the required quantity of

oxygen (air supply) at all times. The setting of the air supply, the method of ignition and

the lighting intervals depend on the draught in the chimney, the wind and weather, the

amount of heat required, the fuel, etc. This means that it may take some time before

you get to know the correct functioning of the stove under any given circumstances.

Although you can re your Morsø stove with almost all kinds of wood, you should

not re with wet wood, or unseasoned wood. Wood ought to be stored under a roof

for at least 1 year, and preferably 2 years, with free access to wind. Wood should be

chopped as soon as possible after felling if it is to dry quickly. The wood can be used

once the moisture is less than 20%. During the test, all stoves are tested with wood

with a moisture content of (16 ± 4)%.

Never use driftwood as it usually has a high salt content, which damages both

the stove and the chimney. Impregnated and painted wood and chipboard emit

poisonous smoke and fumes so they should not be used as fuel either

Please note that liquid fuel may not be used in the stove.

Pieces of wood with a diameter exceeding 10 cm should always be chopped. The pieces

of wood should be short enough to be able to lie at over the layers of embers, with air

at both ends. The maximum length of fuel in the stove is 30 cm. The maximum quantity

of fuel is approx. 2 kg/hour (max. 2 pieces of wood each time you re-stoke).

The rst few times you light the stove, the re should be moderate so that the heat-

resistant paint can harden before ring more vigorously. During the hardening phase,

the paint may develop obnoxious smoke and smell the rst time it is lit, which is very

normal. Make sure that the room is well ventilated during this period.

When heating up or cooling down, the material is exposed to major temperature

dierences that may cause the stove to give o creaking sounds.

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