Open fuel chamber door
The draught fan must be running before the fuel
chamber door is opened so that any combustion gas
can be extracted from the fuel chamber.
Fig. 6-4: Fuel chamber door
If the boiler has not safely cooled down, no boiler
doors may be opened without a draught fan
running. A sudden inflow of air in the presence of
smouldering wood may result in a deflagration.
The fuel chamber door is always closed during
both start-up and heating operation. It is opened
only when ash is removed from the boiler.
Checking the fuel chamber
Use the poker to distribute ashes and charcoal evenly
throughout the fuel chamber. The ash serves as
insulation and protects the grate and bottom of the
combustion chamber from too rapid wear. Therefore,
leave a layer of ash approximately 3 cm thick in the
fuel chamber.
Fig. 6-5: Distributing ash and coal evenly
Check the openings for the primary air in the
suspension plates and also the burn-through openings
in the grate. These openings must be free so that the
fire enters the combustion chamber when it is lit. If not,
use the poker to free them.
Fig. 6-6: Openings for primary air and burn-through openings
Placing logs close together in the fuel chamber
The boiler is optimized for 50 cm logs, which should be
used because this makes the best use of the filling
space.
Add the required amount of closely spaced logs to the
fuel chamber. Stack the logs instead of throwing them
in at random. Always place the first layer of logs
lengthwise, so that it ignites quickly. See the following
graphic.
Fig. 6-7: 50 cm log
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