14
7.
User’s boiler service
COKE, ANTHRACITE
The optimal fuel is coke with granularity of 40 – 60 mm but it is possible to burn even coke and anthracite
with granularity of 20 – 40 mm (nut 2). In case of sufficient chimney draught (0,15 to 0,25 mbar) it is possible
to burn even non – caking anthracite with granularity of 30 – 50 mm (nut 1) and 50 – 80 mm (cobbles).
WOOD
To reach the rated power of the boiler it is necessary to keep a maximum humidity at wood of 20 %.
Cleaning of the grate is performed so as the hot fuel would not get through to the ashtray.
The fuel needs to be stored in dry conditions.
Chart Nr. 5 Recommended dimensions of wooden logs
Section number
3
4
5
6
7
8
9
10
Log average [mm]
φ
40 to 100
Log length [mm]
180
270
360
450
540
630
720
810
Other sorts of wood such as wood clips, wood shavings, sawdust, granules or coal – cakes can be used as
additional fuel. In case of heating with smaller clogs (wood clips, wood shavings, sawdust, granules) it is
necessary to put logs in the bottom part of the burning chamber so as the fuel would not get through to the
ashtray. It is possible to reach smoother burning by further interlaying of the fuel.
These sorts of fuel must have heating power in the range of 12 to 15 MJ.kg
-1
and humidity to 20 % to prevent
from reducing of the mentioned boiler power.
Heating up
1. Check the water volume in the heat system on the thermomanometer.
2. Open the closing armatures between the boiler and the heat system.
3. Clean out the grate, ashtray, smoky channels and boiler walls.
4. Spread out the kindling through the ash door with the stoker – hole on a cleaned grate along its entire
depth.
5. Set the smoky flap in the chimney – pot to position – open and close the stoker door.
6. Set the kindling afire through open ash door and stoker door.
7. Close the stoker hole and ash door and fully open the stifling
8. Thinner layout of the basic fuel to be put up on the burning wood.
9. After its good burning up more fuel to be put up to the bottom part of the stoker hole, the fuel to be
stacked to a uniform layout along its entire boiler depth.
10. As soon as the fuel grades to a dark red flame the air rose of the secondary air input on the stoker hole to
be opened with an instrument.
11. After flames become yellow the air rose of the secondary air input to be closed.
Provoz
1. After reaching the heat water temperature the burning air input to be adjusted. The boiler power in rough
limits is regulated with a chimney draught change with a help of the smoky flap in the chimney – pot. The
fine power control is performed by means of a choker (stifling) by manual regulation of the air intake
under the grate. The choker (stifling) in the ashpan door must be almost closed the at the moment when
it is reached the required temperature of heating water.
2. According to heat needs and burning intensity the boiler is needed to be supplied with fuel during the
operation. Feeding the fire so as the fuel layout was equally high along the entire boiler depth.
3. When using the anthracite it is necessary the air rose of the secondary air input in the stoker hole to be
partly opened for the whole time of the build – up of gases and flames out of freshly fed fuel (the air rose
of the secondary air input with regard to the surface temperature is necessary to be controlled with an
instrument.
4. At change over to night still operation the grate to be cleaned out, the freshly fuel to be let well burnt up
and then the boiler power to be suppressed by throttling of the chimney draught with chimney flap in the
chimney – pot and by turning down the air rose of the secondary air input. The smoky flap and air rose
opening level is necessary to be tried out, it is always necessary to make sure that the product of
consumption did not get away to the boiler room.
5. The morning boiler operation reconditioning to be performed by opening of the smoky flap and air rose
and with grate raking after opening the ash door.
6. The ash door must be during the operation permanently closed.
7. The ashtray to be emptied according to needs (gloves need to be used).
