fire begins to burn, add larger amount of fuel and set draught regulator on desired temperature /
position.
Make sure that lower boiler doors are closed during boiler use.
In case of an uncontrolled increase of pressure and temperature of the water in the boiler, due to
various reasons (such as power failure causing interruption of the circulation pump operation, circulation
pump defect, uncontrolled entry of air into system) close all air supply to the boiler or eventually take
the fire out if the safety conditions allow that (there are no inflammable materials in the area). In case of
power failure put the draught regulator in the zero position and the flap on the boiler chimney take-up
in the closed position.
It is obligatory to pay special attention that the pressure inside the installation is within range. If
the pressure is below the critical value, stop the boiler operation and refill the system when the boiler is
cold.
The water hardness may not exceed the recommended value. If you heat the boiler using coal, de-
pending on the kind of coal and quality of combustion, boiler is to be cleaned in detail at least every 30
days. Dirtier the boiler, the efficiency of the system is smaller.
It is not allowed to extinguish the fire in the boiler artificially, it is forbidden to sprinkle the water
inside the heating chamber. After the heating season boiler should cleaned from ash and soot and the
chamber should be treated with some protection agent against corrosion.
In case of any mechanical problem (the draught regulator is blocked, or the circulation pump is defect)
stop the boiler operation first – only when the boiler is cold, reparation action can be undertaken.
6
Boiler cleaning and maintenance
It is recommended that the boiler is cleansed from ash once to two times weekly. A detailed cleansing
of the boiler should be done once a month and also when the heating season ends. Regular maintenance
extends the service life of the boiler. Cleaning is to be done through upper and lower door of the boiler
but also using the opening on the back side (chapter 1, position 10).
9
