Nordpeis N-20 U, User Manual, Page: 7 / 48

Choice of fuel
All types of wood, such as birch, beech, oak, elm, ash
and fruit trees, can be used as fuel in the insert. Wood
species have different degrees of density - the more
dense the wood is, the higher the energy value. Beech,
oak and birch has the highest density.
Attention!
We do not recommend using fuel briquettes/
compact wood in our products. Use of such fuel
may cause the product to overheat and exceed the
temperatures determined safe. Burning briquettes/
compact wood is done so at your own risk and only
small amounts (max 1/3 of normal load) should be
used for each load.
Warning:
Make sure the insert is not overheated it can cause
irreparable damage to the product. Such damage is
not covered by the warranty.
Source “Håndbok, effektiv og miljøvennlig vedfyring” by Edvard
Karlsvik SINTEF Energy Research AS and Heikki Oravainen, VTT.
Warning:
NEVER use impregnated wood, painted wood,
plywood, chipboard, rubbish, milk cartons, printed
material or similar. If any of these items are used as
fuel the warranty is invalid.
Common to these materials is that during
combustion they can form hydrochloric acid and
heavy metals that are harmful to the environment,
yourself and the insert. Hydrochloric acid can also
corrode the steel in the chimney or masonry in a
masonry chimney. Also, avoid burning with bark,
sawdust or other extremely fine wood, apart from
when lighting a fire. This form of fuel can easily
cause a flashover that can lead to temperatures
that are too high.
8. Advice on lighting a fire
The best way to light a fire is with the use of lightening
briquettes and dry kindling wood. Newspapers cause
a lot of ash and the ink is damaging for the environment.
Advertising flyers, magazines, milk cartons and similar
are not suitable for lighting a fire. Good air supply is
important at ignition. When the flue is hot the draught
increases and door can be closed
Use clean and dry wood with a maximum moisture
content of 20%. The wood should be dried for a mini-
mum of 6 months after it is cut. Humid wood requires
a lot of air for the combustion, as extra energy/heat is
required for drying the humid wood and the heat effect
is therefore minimal. This in addition creates soot in the
chimney with the risk of creosote and chimney fire.
In case of a chimney fire, close the door and air
supplies on the stove / insert and call the Fire
Brigade. After a chimney fire the chimney must in
all cases be inspected by an authorized chimney
sweeper before you use the appliance again.
Storing of wood
In order to ensure that the wood is dry, the tree should
be cut in winter and stored during the summer, covered
and in a location with adequate ventilation. The wood
pile must never be covered by a tarpaulin lying against
the ground as the tarpaulin will then act as a sealed lid
that will prevent the wood from drying. Always keep a
small amount of wood indoors for a few days before use
so that moisture in the surface of the wood can
evaporate.
Usage
Not enough air to the combustion may cause the glass
to soot. Hence, supply the fire with air just after the
wood is added, so that the flames and gases in the
combustion chamber are properly burnt. Open the air
vent and have the door slightly ajar in order for the fla -
mes to establish properly on the wood.
Note that the air supply for the combustion also can
be too large and cause an uncontrollable fire that very
quickly heats up the whole combustion chamber to an
extremely high temperature (when using with a closed
or nearly closed door). For this reason you should never
fill the combustion chamber completely with wood.
Warning!
The Firebox shall to be always closed except during
ignition, refueling and ash removal.
Warning: NEVER use a lighting fuel such as petrol,
karosine, alcohol or similar for lighting a fire. This
could cause injury to you as well as damaging the
product.
7 GB