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5.2.8.
Nominal thermal load of the burner of series “GP”
After the pellet burner has been started successfully (the fuel in the
combustion chamber is ignited) and the heat consumer unit, which demands heat
energy is heated up and tempered, one could assume that the system: burner-
heat consumer unit are in steady-state mode and thermally tempered. The
adjustment process should be performed in such steady conditions, followed by
appropriate air control flap adjustment. In this mode an installer should perform
so called “warm test” of the system, following the active norms and
requirements. Also adjust the position of the lever, which controls the air flow
rate, color synchronized according to the position of the thermal capacity
potentiometer of the burner, in order to achieve high efficiency combustion
process.
NOTE :
It is not recommended to operate the burner at thermal load lower than
minimal thermal capacity, indicated in its technical information, as such
conditions are characterized with decreased efficiency. If the unit should operate
at thermal capacity, lower than nominal operation mode, one should perform
local adjustment of the operating parameters of the burner – both the thermal
capacity and the air flow rate, in order to ensure high efficiency and high
reliability of the system;
ATTENTION:
Air flow rate considerably influence the operating mode of the
burner and the overall system performance and efficiency – if the air flow rate is
less than required, than the fuel is partially unburned due to low mixing
intensity and decreased combustion efficiency. In case that the air flow rate
exceeds the optimal air flow rate (for the operating thermal capacity of the
burner) the result will be also a sensible decrease of the combustion efficiency
due to intensive cooling of the combustion process and respectively increased
amount of unburned fuel as well. The above mentioned characteristics should be
carefully considered and appropriate adjustment of the combustion process
properties should be done in order to achieve high efficiency and economic
performance of the system. The air flow rate adjustment is made by adjustment
of the position of the lever, synchronized to the position of the thermal capacity
control potentiometer, which allows to achieve optimal operating conditions and
high efficiency of the burner.
5.3.
Adjustment of the thermal capacity of the burner
Adjustment of the thermal capacity of the burner is performed by simultaneous
adjustment of the position of the thermal capacity potentiometer (i.e. the fuel
flow rate) and the air flow rate, controlled by the flap of the burner’s air fan.
Adjust the air control flap position according to the position of the thermal
capacity potentiometer (the so called color synchronization).