16
Q
N
nominal heat output in kW
T
b
burning time in hours
Q
H
thermal load of buildings in kW
Q
min
the minimum heat output in kW
The dimensions of accumulation tanks for central heating boilers that are operated with individual prescribed fuels,
must be set according to the output, which needs the biggest accumulation tank. This type of accumulation tank isn´t
necessary in case that the calculated volume doesn´t exceed 300 l.
3. Manual for operation
3.1 Boiler operation by user
COKE
The most suitable fuel is coke of 24 – 60 granularity
Burning time at the nominal output is 4 hours.
HARD COAL
The most suitable fuel is hard coal of 24 – 60 mm
granularity. Burning time at nominal output is 4 hours.
SOFT COAL
The most suitable fuel is sort coal with 24-60 mm
granularity.
Burning time at nominal output is 4 hours.
ADDITIONAL FUEL – WOOD
Using this fuel it is not reached the nominal output.
Firing
1. Check the water volume in the heating system on thermomanometer.
2. Open the closing fittings between the boiler and the heating system.
3. Clean the grate and ash-pan.
4. Insert the kindling and wood trough the ash door on the cleaned grate all over its depth.
5. Light the kindling throught the ash door.
6. Close the ash door and opet fully the choke. For 8 – 10 sectional version open the rear choke too.
7. Put the basic fuel bed on the burning wood.
8. After its good burning put another fuel up to the lower edge of stoking door and balance the fuel to the equal levels
on all the depth of 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 ath the moment of achieving the required
heating water temperature.
2. According to the heat requirement and according to the burning intensity it is necessary to refill the boler by fuel
during the boiler operation. Stoke in the way making sure that the fuel layer is equally high along the whole depth
of the boiler.
3. When using coke, hard coal and soft coal it is necessary to open partially the stoking door choke for a primary air
inlet. The teriary air inlet choke must be opened at 5 mm.
4. To switch-over to the night inhibition regime clean the grate and let the newly stoked fuel well burn. Close the ash
door choke. The stoking door choke must be always open. The draught regulator can be disconnected in this case
(close the choke totally).
5. The morning re-putting into operation make by opening the ash door choke, together with poking up the grate after
the ash door opening.
6. The ash door must be closed during the boiler operation.
7. If necessary, clean the ash pan (the gloves needed).
3.2 Boiler cleaning - maintenance
1. Remove the ash from the ash-pan during the boiler operation even several times a day according the the fuel type,
because the full ashpan inhibits the correct combustion air allocation under the fuel and causes the unequal fuel
burning on a grate. All the rests in heating chamber, specially the cinder, do remove before every new firing and at
the morning re-putting into boiler operation. The ash must be placed into the non-flammable container with cover.
Use the protecting aids and be personal safety minded during the work.
2. At burning coke, hard coal and soft coal clean monthly by the help of boiler brush the walls of the boiler inside the
hopper, smoke adapet (Fig. no. 12), space for tertiary air inlet (unscrew the closing plate – Fig. no. 13).
(38 pages)
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