Technical information

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3.2 Boiler cleaning - maintenance
1. Ash from ash pan and small ash pan has to be removed in the boiler operation even several times a day
according to the type of used fuel, because full ash pan protects the correct division of the combustion
air under fuel and evokes rough burning of fuel on grate. Al residues in the boiler furnace, mainly cinder
have to be removed before each new burning start and in course of the morning boiler operation
reinsertion. It is necessary to put away the ash into the fireproof containers with covering. During working
period it is necessary to use safety helps and to care the personal safety.
2. In the course of the heating with coke, hard and brown coal it is necessary to clean regularly once a
month the boiler walls inside the feeding hopper and also the smoke extension part (Fig. no.14).
3. After the heating season end or as needed (this is influenced by the quality of fuel, chimney draught and
setting of boiler) it is necessary to clean up the boiler flue gas passage. It is necessary to screw off the
cleaning covering with use of socket spanner with handle, with use of assembly spanner, to put out the
partitions of the combustion space, to clean up the flue gas passages with pertinent cleaning tools. (Fig.
no. 15). After cleaning up it is necessary to put back the partitions of the combustion space in such way
in order the rear boiler part remained close and then to screw up the cleaning covering. Pull out the small
ash pan (at 5-10 boiler sections also the rear air-rosette) and clean up the air ducts by inserting your
hand with a wrench (see Fig. no. 15 - item 4) into the inlet of tertiary air.
4. Provided settlement of tar agglomeration on the combustion space walls has been occurred in course of
using fuels with greater gas formation we remove them with scraper or with burning out using hardwood
(eventually coke) under the boiler putting into maximum working temperature at the open partition of the
smoke adapter.
5. After the heating season ending it is necessary to clean the interconnection between the boiler smoke
adapter and chimney and then to treat pivots of the flue gas flap with the carbon grease.
1 – Screw with the hexagon head M5 x 14
2 – Washer 5,3
3 – Cleaning covering of the smoke extension piece
4 – Insulation of the cleaning covering of the smoke
extension part
Fig. no. 14 Cleaning of the smoke extension piece