Ladan 18 Instruction For Use, Installation And Assembly page 9

After removing a fan and air inlet cover we can see the two tubes that lead air into the nozzle and
to two holes at the upper door. These holes should be cleaned with a small brush and vacuum
cleaner. Turn on the fan and check by hand the clearness of air.
Put the cover of air inlet and fan back. Then it is necessary to set up the shutter of the secondary
air. We screw the shutter to stop with a screwdriver and then turn counter-clockwise 1-2 turns.
Before the summer season starts, we totally clean the boiler loading chamber, combustion
chamber and tubes in the heat exchanger.
Maintenance and repair of the boiler:
During operation of the boiler it is necessary to check the water pressure in the system, door
tightness, chimney shutter tightness, heat exchanger cover tightness and the right fan operation. It
is recommended to have the boiler checked by a professional service worker once before the
beginning of the heating season. Especially to check the correct function of the safety valve,
temperature sensor, emergancy thermostat and regulation.
Door tightness:
The door is attached to the boiler in three points. Two hinges and one door handle.
In case of door leakage it is possible to screw in the door handle but also draw close the hinges.
Chimney shutter tightness:
At cleaning of the heat exchanger it is necessary to clean also seating surface of the shutter and
shutter itself.
Running the fan:
Fan cleanness is one of the conditions for reliable operation of boiler. The fan should be checked
and serviced.
Draught of chimney:
Flue draught must have the specified value 23 Pa.
- Small flue draught shortens the service life of the boiler – creating tar inside the
boiler, condensation and smoke during the fuel loading.
Solution: insert the chimney, put a special extension on the chimny or use
a suction fan in chimney.
- Strong flue draught of chimney increases the consumption of fuel, higher heat loss
in the chimney, lower boiler efficiency and lower boiler output.
Solution: install a throttle valve between the flue and boiler.
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