ATTACK FD20 Instructions For Use Manual page 17

9. After inflaming it, load other dose of fuel up to the bottom edge of a load port and arrange
the fuel into an even layer.
10. As soon as fuel gets deep red glare, open a little the air disk of secondary air inlet on the load
port by means of a tool.
11. After the flame turns yellow, close the air disk of secondary air.
Operation:
1. After reaching the temperature of heating water adjust the inlet of combustion air. The boiler
output is regulated by the change of draught with the help the flue flap in the cowl. A slight
output regulation is carried out with a fuel cut-off slide that regulates the air inlet under the
grid either manually or with a draught regulator. Adjust the draught regulator so that the
cut-off slide in the ash port was almost closed in the moment when the required tempera-
ture is reached.
2. Reloading the boiler during operation depends on the need for heat and burning intensity.
When reloading, the layer of fuel must be equally thick.
3. When using coke, black coal, wood, it is necessary to open partially the inlet of secondary air
inlet in the loading port during all the time of inflamation of reloaded fuel. (The air inlet
must be controlled by a tool due to the surface temperature.)
4. When starting the night operation, clean the grid, let the reloaded fuel burn thoroughly and
then decrease the boiler output by cutting off the draught by the cut-off slide and turning
down the air inlet of the secondary air inlet. The level of opening of the cut-off slide and air
inlet must be tested and it is necessary to prevent escape of flue gases into the boiler room.
The draught regulator should be turned off (close the cut-off slide).
5. To restart operation of the boiler in the morning, open the cut-off slide and air inlet and rake the
grid after opening the ash port.
6. The ash port must be permanently closed during the operation of the boiler.
7. If necessary, empty the ashtray out (use protective gloves).
Dew creation and tarring of the boiler
After first burnings in a cold boiler water condenses on the walls and flows down into the ash
collection space which can make the impression that the boiler is leaking. This dew disappears
after setting ashes down on the inner walls of the boiler. When the boiler runs with low tempera-
ture of water under 65°C and with wet wood, water condensates in flue gases, condensate flows
down cold walls of the boiler. Heating with low temperatures is also not suitable for the lifetime
of the chimney body.
Tarring of the boiler occurs under similar conditions (low output, low temperature) furthermore
during insufficient burning (lack of combustion air) Tar from the boiler can be removed best un-
der the minimum temperature of 90°C in the boiler. This temperature can be reached fast by
turning off the radiator. To prevent dew creation and tarring of the boiler, it is recommended to
run the boiler with the temperature over 65°C and choose the boiler according to the needed
output of the heating system. Overlarge boiler then is deteriorated at low temperatures.
Interrupting the operation of the boiler
The operation is interrupted when the fuel in the boiler is let to burn up. We do not recommend
to haste the interruption of the operation in any way.
Shorttime interruption of the operation
For shorttime interruption of the operation clean from burnt fuel, empty the ashtray, clean sur-
faces of load port, clean the ash collection space and close the load and ash port.
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