Instruction manual

25
remove the packing cord from the rabbet by a screwdriver. Remove the nozzle body and clean the
holder thoroughly from the tar and old lute. Put the nozzle body insulation on the cleaned surface.
Take the nozzle and put it on the holder, so that the shorter wall was in the rear part of the boiler.
The lateral clearance must be the same. Take the new set of packing cords of the nozzles and with a
light knock, press it into the gap to be at the same level with the nozzle.
Setting of the boiler´s combustion
The boiler´s combustion is set by the regulation flaps of primary and secondary air. Boilers are from
the production set for the most optimal burning conditions according to emissions and flue gas
tempertature. Setting can be executed only by producer or by trained serviceman.
Optimum setting of the regulation flaps:
Permanent-heat operation
Permanent-heat operation of the boiler means that the fire can be kept during the night without
heating up daily, but only in winter. This way of operation shortens the service life of the boiler. For
permanent-heat operation prepare the boiler in the following way:
Put a few bigger logs (4-6) on the glowing layer
- Shut the mixing valve. After closing the valve the temperature of water rises to 80- 90°C.
- Suction fan turns off.
- Regulation flap controlled by regulator shuts automatically and the fan is switched off.
In the boiler prepared like this, burning is kept for more than 12 hours. During permanent-heat
operation, the temperature of water in the boiler is 80 - 90°C.
Boiler cleaning
The boiler must be cleaned regularly and properly every 3-5 days because ash subsided in the
feed hopper together with condensates and tar decreases output and lifetime of the boiler and
isolates heat-exchanging surface. When there is too much ash, there is not enough space for
burning out of fuel and a holder of ceramic jet as well as the whole boiler can be damaged. When
cleaning the boiler, firstly turn the ventilator on, open the feeding door and wipe the ash through a
slot into bottom space. Leave long unburnt logs in the feed hopper. Move the lever for exchanger
cleaning for several times. After opening the bottom cleaning hole, take ash and soot out. After
opening the bottom door clean the bottom space. Cleaning interval depends on the quality of wood
(moisture content), heating intensity, draft of the flue and other circumstances. We recommend to
clean the boiler once a week. Do not take the refractory adapting piece out when cleaning. Once a
year minimally clean the radial impeller of the fan and check fouling of regulation of primary and
secondary air flowing into feeding chamber through the cleaning hole and clean with a screwdriver,
if it is necessary. It influences the output and quality of burning.
WARNING - Regular and proper cleaning is important for permanent output and service life of the
boiler. In case of insufficient cleaning, the boiler can be damaged and guarantee expires.
Prescribed fuel
Specified fuel is dried cut wood and logs of 80-150mm diameter, with min. 12% and max. 20%
moisture content and calorific value of 15 - 17MJ/kg. It is also possible to burn big pieces of
wooden waste with coarse wood logs.
Note
It is necessary to cut the logs of bigger dimensions into halves or quarters (because of the
requirement of operation to nominal output). You can burn hard as well as soft wood. Wood must
be dried! Boiler output depends on the moisture content of wood. Output and function of the boiler
Primary air flap:
DPX25 open wide
DPX35 open wide
DPX45 open wide
Secondary air flap:
DPX25 open to the 3rd mark
DPX35 open to the 4th mark
DPX45 open to the 5th mark