4
Mareli Systems
3. Connection (installation) to the boiler:
The pellet burner can be attached to a steel or cast-
iron boiler with power from 10 to 50kW. The min-
imum depth of the combustion chamber should be
450 mm. Pellet burner without secondary air supply.
•
Distance between the flame and the cooling
surface of the boiler 150mm.
•
The unit is located so that there is enough space
for cleaning, removing ash from the burner,
boiler and exhaust pipes.
•
Putting objects on the unit is forbidden, so
as not to break the seal. There is a danger of
breaking and violating the integrity of the
burner.
•
The opening for installation of the burner must have a width 128 mm and height of 121 mm. The size of
the door, to be joined must allow for the incision of the above-described mounting hole (if there is none).
•
The burner is installed in the boiler door with the corresponding seal. Secured tightly with screws M8.
The relationship between the burner and boiler should be well sealed in order not to get gas leaks into the
room. When installing the equipment is in optimal horizontal position and the inlet hose pellets should
be straight and clamps must be properly tightened.
Appendix 1
Reconstruction of hot water boiler with automated burner
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Cut a hole in the available door (if there is no such planned). The sizes described in the instructions
should be respected.
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Thoroughly clean the interior walls of the boiler from ash residue, soot, etc., which would have led to
appearance of thermal resistance during operation. After cleaning, the drawer for collection of the ash
from the combustion chamber must also be taken out.
•
Then, mount and securely attach a pellet burner to the door through M8 screws (which are screwed,
where the thread is made on the door itself), which holds the burner to the door.
Explanation
: It must be checked whether sealing ropes of the doors fit snugly to the boiler housing. If any
gaps are found, the corresponding sealing rope must be replaced and ensure the density of this zone;
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Install the fuel supply conveyor, which feeds the automated pellet burner.
CAUTION: Before installation of the valve must be drained circulating water from it!
•
Install the fuel transport auger that feeds the pellet burner.
The fuel supply conveyor must be installed in such a way so that fuel can be freely extracted from the hopper
– from its lowest point. In the event that the hopper is made/assembled on site, it is recommended to make
a manhole for servicing the rowing area of the screw conveyor. The screw conveyor pipe itself also must be
fastened, so as to ensure against upheaval and possible change of the screw conveyor axis angle against the
horizontal plane.
Explanation
: The tilt angle (between the screw conveyor axis and the horizontal plane) of the screw conveyor
has a direct effect on its performance, i.e. the fuel flow which it will provide at a specified operating mode.
That is why adjustment of the burner settings is likely to be required upon change of this angle, in order to
insure specific heating power.
•
Provide the power supply directly through a plug. Before connecting to the power the burner must be
earthed through a 4 mm2 copper wire with yellow-green insulation.
Power supply is provided through a Shockproof type plug directly in the mains.
CAUTION! The burner control unit should be plugged into an outlet, which must be earthed. There is a risk
of electric shock in the absence of earthed plug! The manufacturer bears no responsibility!
