3.0 OPERATING INSTRUCTIONS
3.1 Suitable fuels
Please
note that HETAS Ltd Appliance Approval only covers the use of wood logs and approved smokeless fuels on this
appliance. HETAS Ltd. Approval does not cover the use of other fuels either alone or mixed with the recommended fuels listed
above, nor does it cover instructions for the use of other fuels.
Use the following fuels only:
Dry wooden log (beech, oak)
Wooden briquette
Brown coal briquette
You can find the exact information on the technical data and on the appliance data badge. You must only burn the specified
fuel and failure to burn the correct fuel can damage the appliance and chimney system. This would also invalidate the warranty
of the appliance.
Depending on your choice of the fuels listed above, be sure that you use fuels of good quality.
Wooden logs reach 15-20% humidity which is the most appropriate for heating if they are stored outside for 1to 2 years (if they
are covered and protected from rain). Recently cut wood has a high moisture content and burns poorly and causes soot. Apart
from its very low heating value it is also a pollutant to the environment. High condensation and tar can lead to blockage in the
stove and especially in the chimney. In all cases it causes deposit on the glass front and emissions that need to be avoided.
Burning wood is recommended for operating the appliance at its nominal capacity. You can get the exact data at a fuel
supplier. Load the fireplace with fuel according to heat demand. The heating value of 1 kg of dry wood is 4 – 4-5 kW/h. So you
can place about 1.3 kg of wood into a stove of 5 kW capacity every hour.
When burning wood, if you would like to reach a lower capacity, do not restrain the fire. Put less wood in at one time instead.
Don’t throw the fuel in the combustion chamber, because it can damage or break the chamotte or vermiculite tiles. Be aware
that the volume of some types of wooden briquettes increases during burning. Choose the wooden briquette that has the
appropriate size to the measurements of the combustion chamber and does not increase in size while burning.
You can use brown coal briquette for burning at nominal capacity just as wood or wooden briquette. Apart from that, it is also
excellent for keeping the embers glowing during the night (about 10 hours). In the case of brown coal briquettes, wait until the
fuel is completely burned through and close the primary air regulator to keep the embers burning only after that. The types of
fuels that can be used, the maximum quantities that can be loaded at one time and the description of settings for the air
regulators, can be found in the attached technical chart.
Reducing emissions
You can only avoid unwanted emissions by the use of the specified fuels. Put only the amount of fuel in the fireplace that is
appropriate for necessary heat transmission. Burning more fuel is unnecessary and leads to unwanted emissions. Don’t burn
waste in the appliance or products that can dramatically pollute the environment. This will also damage the appliance. The
use of other fuels than the ones listed above is not allowed.
You
MUST NOT
burn the following materials in the fireplace:
Wet or treated wood,
Wood-shavings, sawdust,
Inner bark, bark, shavings panel,
Coal dust,
Waste, scrap, plastic, rubble
Paper and cardboard (apart from lighting the fire)
PAGE 10
