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KALVIS - 2 - 70 EN 2022.08.22
burning coal to be pocked via poker through the gaps of the inner door. Large volume
of generated ash prevents primary air from entering, so ash has to be removed timely.
Lower door has two primary air valves installed. Upper valve assists with air
supply when ash clogs the ash holes.
If there is no need to open fuel loading door (
6 and 8
) during combustion, don’t
open it.
Boiler combustion needs much air, so enough volume of air has to enter into the
premises where boiler is installed.
Notice. In case of lower heat demand then boiler nominal output, in order to avoid
the permanent loaded fuel smoldering (inside of boiler may accumulates the resin,
do not load with fuel full furnace. We recommend to load one third of furnace.
Notice. When boiler is started to operate, during firing, on the internal boiler walls,
when there is no sooth layer yet, when firewood burns, water condensate forms,
which can look like the boiler is not tight and leaks water. Water steam condensate
disappears when the water temperature in the boiler raises up to 70 – 80 °C with
the help of 4-way mixing valve. It is recommended to maintain water temperature
in the boiler as high as possible. If return water temperature is less than 60 °C,
water steam condenses on internal surfaces of the boiler, which combine with
combustion products and form chemically aggressive acids, under effect of which
boiler service life can be reduced significantly. In order to make sure that the
boiler is tight, stock it at high intensity for several hours, then, stop stocking and
make sure if amount of condensate increases. If it doesn’t, the boiler is tight.
Attention! If boiler is operated incorrectly, fuel is unsuitable, low chimney draught,
the dampers installed in the boiler can get stuck, so during the heating season
move the dampers: open and close several times all the valves installed in the
boiler.
7.5.
Boiler extinguishing
During usual operation, boiler is self-extinguishing when fuel charge completely
burns out. If boiler has to be extinguished in the forced way, firstly, remove fuel from
the furnace (
4
). Throw burning fuel into a vessel with water – this will reduce smoke
in the premises. During forced extinguishing, open roods or windows to assure good
ventilation of the premises.
Attention! It is prohibited to pour the water onto burning fuel in the furnace.
7.6.
Boiler cleaning
Ash, accumulated under the fire grate (
29
) (
see picture 1
), may prevent air supply
to the furnace (
4
). So, no rarely than before each second firing, remove the ash from
the ash tray (
30
) and scoop remaining ash.
Attention ! It is allowed to clean the boiler, remove the ash tray and scoop up the
remaining ash, having only the boiler fully extinguished and cooled down.
In order to assure the efficient boiler operation, it is necessary to clean periodically
the sooth from the internal surfaces of the boiler. Intervals between cleanings depend
Summary of Contents for K-2-70
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