Technical information

21
10. When the fuel starts burning well, stoke another fuel up to the lower edge of the stoking door. During
stoking the fuel, do not fill the short circuit hole. For proper function of the boiler it is necessary that the
partition of the smoke adapter closes tightly (see chap. 2.6.1 item c).
11. After closing the stoking door close the partition of smoke adapter by means of the draw bar of smoke
control. Thus the shorting opening is closed.
Note: In course of making fire the boiler dewing can occur – it is not considered as a defect.
Fig. no. 13 Scheme of flue gas passage through the boiler
Operation
1. After having achieved the heating water temperature regulate the combustion air inlet. The boiler output
is regulated by choke, which regulates the secondary air inlet under the grate either manually or by use
of the draught regulator. Adjust the regulator so that the ash door choke is nearly closed at the moment
of achieving the required heating water temperature.
2. According to heat need and burning intensity, it is necessary to stoke the fuel up to the lower edge of the
stoking door (hot layer suitable for further fuel stoking is min. 15 cm). Stoke in the way making sure that
the fuel layer is equally high along the whole depth of the boiler. During stoking, do not fill the fuel into
the short circuit hole.
ATTENTION! Prior opening of the stoking door it is necessary to open the smoke adapter
partition with use of the smoke control pull rod.
3. When using hard coal and brown coal as fuel the rosette of stoking door for primary air supply must be
ajar at 3-5 mm and when using wood as fuel it must be opened at maximum. When using coke as fuel to
rosette must be fully closed.
4. The rosette in the rear part of the boiler must be ajar at 1 mm up to at 0 - 5 mm (at 3 and 4 boiler
sections the air rosette is set on the rear boiler section to 0 - 1 mm and at 5 -10 boiler sections it is
gradually increased as needed). Between the front section and a small ash pan there also must be a gap
(guaranteed by the backstops at the ash pan) to ensure the supply of tertiary air (if necessary this gap
can be enlarged).
Important notice!
The dark smoke from the chimney signals not fully closed partition of the smoke adapter or a
lack of tertiary air. A large volume of tertiary air results in cooling of flue gases and thereby
reducing the efficiency of the boiler. Full closure of stoking door rosette in case of hard and
brown coal can also cause dark smoke from the chimney and boiler tarring.
5. At the transition to the night top-fed stove damped operation the grate must be cleaned and freshly
stoked fuel must flare. Close the choke of ash pan door. The rosette of stoking door is also kept ajar the
draught controller in this case can be unhung (the choke completely closed).
6. The morning re-putting into operation make by opening the ash door choke, together with poking up the
grate after the ash door opening.
7. The ash door must be closed during the boiler operation.
8. If necessary, clean the ash pan (the gloves needed).