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gases, convected to the chimney and could lead to flue gas fan
failures and/or any other elements of the boiler at this duct of the
boiler;
•
After the initial fuel has been fired-up, the flue gas fan should be switched
on (turn the START switch into on position), close the door of the fuel
hopper and close the ignition flap , by pushing the lever for driving the
ignition flap backwards (see figure 5.3). This will result in change of the
direction of the flue gases – they will go through the burner’s nozzle and
will pass through the combustion chamber and the convective duct section
of the boiler, rather then being extracted directly to the chimney, which
will lead to intensive heating up of the circulating water in the boiler;
•
Turn the flue gases thermostat in order to set it into operating position.
This position should be derived experimentally (it is recommended to
mark this position for convenience), by observing the ignition process of
the boiler;
•
Adjust the thermovalve, which controls the air flow rate. At ignition this
flap should be opened, in order to guarantee availability of air for the
combustion process. After the boiler has been fired-up and the operating
parameters have been reached, it is necessary to make appropriate
adjustment of this thermovalve functionality (see the description below);
EXPLANATION: the heated up circulating water, due to the
gravitational forces starts to convect, circulating through the boiler’s heat
exchanger to the heating system (i.e. naturally driven circulation of the
heating media), this is observed by increasing the temperature of the
inflow and outflow pipes of the system, even if the circulating pump is not
functioning (if any is installed). The circulating pump should run, when
the operating temperature has been reached, controlled by the operating
thermostat (in most of the cases) and the heat energy is transported out of
the boiler to the heating system;
NOTES:
•
During the very first start of the operation of he boiler, intensive water
vapor condensation on the internal surfaces of the boiler could be
observed, even water leakage could be see out of the door of the
combustion chamber of the boiler, as well as the flue gases duct flap,
positioned on the lower back side of the boiler. This is a single process
and will not influence the operation and functionality of the boiler;
•
It is not recommended to open the door of the fuel hopper chamber of
the boiler, when the flue gas fan is not functioning and ignition flap
closed, because volatile gases could be emitted out of this chamber to
