6 Boiler In Use
6.1 Circulation Pump Thermostat
Boiler should be equipped with a thermostat for the system circulation pump. The thermostat thresh-
old can be set on certain value and only when the temperature is higher than that, the circulation pump
will be turned on.
This thermostat is primarily used when ring with solid fuel, in order to prevent the low temperature
of the return line which can lead to condensation as a consequence. As the heating up process with wood
pellets is usually much faster compared to conventional wood, the eect of condensation should not take
place at all when burning pellets. The default value for temperature threshold is set at 60
◦
C.
6.2 Maintenance and cleaning
Using wood pellets as a primary fuel means very low level of ashes (less than 1%). The cleaning of the
boiler can thus be performed once per week and does not take more than 5 minutes. Burner ash-tray
should be however cleaned every day or two - operation which takes less than a minute.
Using pellets means also low temperature of the ue gases due to the high eciency of combustion.
This means the boiler would last much longer compared to combustion with traditional solid fuels such
as wood or coal.
7 Safety features
7.1 Thermal safety in case of overheat (closed systems)
Burner has two main safety features: The internal feeeding auger prevents re passing from the boiler to
the burner body. The other feature is that if the temperature of the ue gases does not drop below 250
◦
C the burner will be forced to work with minimum power (which means minimum quantity of pellets
added every time).
For additional hydraulic protection in the closed systems it is necessary to install to safety thermal
valve shown on image (to be bought separately, not an integral part of the boiler).
If for some reason the temperature of the water inside the boiler should exceed 95
◦
C this valve would
release the water from the water supply system to cool down the water temperature inside the boiler.
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