Use - Jøtul MF 3 Installation And Operating Instructions Manual

4.5 Chimneys and fl ue pipes
• The fi replace can be connected to a chimney and fl ue
pipe approved for solid fuel fi red appliances with fl ue gas
temperatures specifi ed in «2.0 Technical data.
• The chimney's cross-section must be at least as big as the
fl ue pipe's cross-section. See «2.0 Technical data» when
calculating the correct chimney cross-section.
• The fi replace should not be connected to a shared chimney.
Contact your local building authority regarding restrictions
and installation requirements.
• Connection to the chimney must be carried out in accordance
with the installation instructions from the supplier of the
chimney.
• Before making a hole in the chimney the fi replace should
be test-mounted in order to correctly mark the position of
the fi replace and the hole in the chimney. See fi g. 1 for
minimum dimensions.
• Ensure that the fl ue pipe is inclined all the way up to the
chimney.
• Use a fl ue pipe bend with a sweeping hatch that allows it to
be swept.
Be aware of the fact that it is particularly important that
connections have a certain flexibility in order to prevent
movement in the installation leading to cracks.
N.B. A correct and sealed connection is very important for
the proper functioning of the product.
The chimney draught should never exceed 2.5 mm H
(25 Pa) when the fi replace is in use. If the draught is too
strong you can install and operate a fl ue damper to control
the draught.
In case of chimney fi re:
• Close all hatches and vents.
• Keep the fi rebox door closed.
• Check the loft and cellar for smoke.
• Call the fi re service.
• Before use after a fi re an expert must check the installation
in order to ensure that it is fully functional.
4.6 Control of functions (fi g. 2)
When the product is set up, always check the control functions.
These shall move easily and function satisfactorily.
Jøtul MF 3 is equipped with the following controls:
Ash door vent control. (Fig. 2A)
Air vent control. (Fig. 2B)

5.0 Use

5.1 Choice of fuel
Always use quality fi rewood or briquetted coal (see point 5.6).
This will give you optimal results, any other fuel may damage
the fi replace.
5.2 Jøtul's defi nition of quality
fi rewood
By quality fi rewood we mean logs of, for example, birch,
beech, and pine.
Quality fi rewood should be dried so that the water content is
maximum 20%.
To achieve this the wood should be chopped at the latest in
late winter or early spring. It should be cut and stacked so that
air circulates around it. The stacks should be covered on top
so as to avoid absorbing excessive rainwater. The logs should
be taken indoors in autumn for use during the winter season.
The amount of energy obtainable from of 1 kg of quality fi rewood
varies very little. On the other hand the specifi c weight of the
diff erent kinds of wood varies considerably. As an example, a
certain volume of birch will provide less energy (kWh) than the
same volume of oak, which has a higher specifi c weight.
The amount of energy produced by 1 kg quality fi rewood is
about 3.8 kWh. 1 kg of completely dry fi rewood (0% humidity)
produces about 5 kWh, while fi rewood with a humidity level of
60% produces only around 1.5 kWh/kg.
Consequences of using damp wood may include:
• Appearance of soot/tar on the glass, in the fi replace and in
the chimney.
• The fi replace emits little warmth.
O
• Risk of chimney fi re as a consequence of accumulation of
2
soot in the fi replace, fl ue pipe and chimney.
• The fi re may die out.
Be especially careful never to lay a fi re using any of the
following materials:
• Household waste, plastic bags, etc.
• Painted or impregnated wood (highly toxic)
• Chipboard or laminated boards
• Driftwood
This may harm the product and pollute the atmosphere.
N.B. Never use combustible liquids such as petrol,
kerosene, red spirit or similar to start the fi re. This may
cause harm to both yourself and the product.
5.3 Log length and amount
The maximum length of logs to be used is 40 cm. Jøtul MF 3
has a nominal heat output of 6,5 kW. This is equivalent to a
consumption of approximately 2,1 kg of quality fi rewood per
hour.
An important factor for proper fuel consumption is that the
logs are the correct size. The size of the logs should be:
Kindling:
Length: 20-30 cm
Diameter: 2-5 cm
Amount per fi re: 6-8 pieces
Firewood (split logs):
Length: 30 cm
Diameter: Approx. 8 cm
Intervals for adding wood: Approx. 45 - 50 minutes
Size of the fi re: 1,7 kg
Amount per load: 2 pieces
ENGLISH
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