CARE & FIRING INSTRUCTIONS
Keddy's fireplace inserts have been tested by an approved Testing and Research Institute.
They have extremely good environmental values and a useful efficiency of 80%. For the
fireplace insert to work optimally, it is of key importance that you follow the care and firing
instructions below. Non-compliance will invalidate the warranty.
FUEL
Keddy's fireplace inserts must be fired with firewood.
Most types of firewood can be used. The most suit
-
able are birch, beech, ash, and elm, but conifers and
oak can also be used if they are mixed 50/50 with
another type of hardwood. Oak contains acids, which
may affect the stove and chimney during combustion.
The firewood must be dry, i.e. with a moisture con
-
tent between 15% and 20%. If the firewood is moist,
an unnecessary amount of energy is used boiling the
water away before it starts burning normally. This
also forms large amounts of soot and tar, which are
deposited on the walls of the hearth and chimney,
which in turn significantly increases the risk of a
chimney fire.
Moist firewood also results in poor combustion, which
leads to greater smoke generation with sooty glass
and deterioration of the local environment as a con-
sequence.
To be certain you will have dry wood when the heat
-
ing season begins, it must be cut in the winter. The
wood is then stored in a ventilated place under a roof
and left to dry during the spring and summer. Before
using the wood, you should keep it indoors for a cou
-
ple of days so there is time for the surface moisture
to evaporate.
WARNING! It is absolutely forbidden to fire the stove
with painted, glued (e.g. Hardboard or chipboard) or
pressure-impregnated wood. It is also forbidden to
burn plastic and other waste in the insert. The com
-
bustion of such fuels and substances releases acids
and heavy metals, which are very harmful for both
people and the environment.
BEFORE FIRING - WHEN THE FIREPLACE IN-
SERT IS NEW
During the first week, firing can be started carefully.
Begin with one or two fires a day with half of the fol
-
lowing prescribed amount of wood.
A particular smell will occur during the first firings in
the insert. This is the cast iron's paint and rust proof-
ing hardening. Ventilate as required and ensure that
there is good air exchange. The smell will normally
disappear after a few fires.
FIRING
When you optimise firing manually, you should
measure the amount of burned wood per hour. The
fireplace insert is not intended for an output exceeding
9 or 10 kWh, i.e. never exceed the maximum amount
of recommended wood per hour. This not only impairs
the efficiency, there is also a risk of overheating the
insert and chimney. Suitable firewood sizes and quan
-
tities for the fireplace insert are:
Kindling:
Length approx.
25-35 cm
Diameter approx.
2-5 cm
Split logs:
Length approx.
25-35 cm
Diameter approx.
6-10 cm
Amount (small model) approx. 1,5 kg per load
Max. amount (small model) approx. 2.7 kg per hour
Amount (large model) approx. 2.0 kg per load
Max. amount (large model) approx. 3.0 kg per hour
NOTE! Every load should burn down completely
before you add new firewood. In which case, the
insert works at its best and you avoid the incon
-
venience of possible blow back.
The damper is closed completely when it is turned to
the left and is open to the maximum when it is turned
to the right (see the illustration below).
The amount of air needed for burning for example 2
kg of wood in one hour depends on several param
-
eters. The length of, and the draught in, your chimney,
how hot the stove and chimney are, i.e. how long you
have fired. The basic principle, however, is that the
stove has to burn calmly and harmoniously and, for a
hot stove, the damper control does not usually exceed
40% in order to achieve this with an output of 5-7 kW.
(The damper control stands at 50% in the illustration
above.)
As a rule of thumb, if you want to reduce the output,
a load of 1,5 kg firewood should burn for 60 minutes.
The insert will then be providing approx. 4 kW.
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