Pellet burner GP 45 IV 26
6.2.4. BURNER FROM SERIES “GP” OPERATION METHOD.
The pellet burner starts operation when the following conditions are provided:
The main burner module is mounted to the appliance designated for joint operation;
Presence of electrical supply;
Activated start from the display module;
Installed circulations water temperature sensor – in case that such method is used for
regulation of the burner operation mode;
Lack of emergency alarm signals;
Transport auger and fuel hopper are filled with pellets;
When these conditions are completed the control module executes the following algorithm:
Electrical power is submitted which activates the external fuel transport auger, the
ignition heating element and the firing (fresh) air fan;
After expiry of the preliminary set time (by the manufacturer), that provides refueling
of the combustion chamber with the so called “ignition” doze of pellets needed for
initial firing, the transport auger power supply stops and it switches off;
After the burner photo-sensor registers presence of burning process the electrical
heating elements power supply stops. After a period of time the burner smoothly
reaches the assigned heating output. If the sensor does not register a presence of
flame in a preliminary set period of time then the system performs second attempt for
ignition and the fuel transport auger activates again by repeating the same algorithm
as described above. The ignition attempts are limited to two;
In case of successful ignition of the fuel the burner transits to nominal operation
mode, which is achieved by periodical fuel feeding and pause for its burning. The
times for feeding and pause are set in the burner’s control module software, as its
heating output can be changed by the operation output levels;
The choice of maximum heating output level - 5
-th
is not recommended. It is used
to increase the output if a lower caloricity pellets are used or for short time
demand for higher output. It is recommended to operate the burner between 1 to
4
-th
level, as with 4
-th
level the nominal heating output can be achieved.
The control is achieved by a NTC sensor that determines the circulations water
operation temperature:
When the assigned temperature is almost reached the burner’s control module
decreases its heating output (the so called modulation of the operating mode);
If the circulations water temperature decreases the burner restores its heating
output.
It during operation the signal for operation has been lost (for example from a room
thermostat), the burner will shut down by performing the algorithm described above;
If the burner is not in operation and it receives signal for start, it will perform the
above described algorithm for operation. The same condition is valid if the
circulations water temperature is lower than the assigned temperature in the burner
control module;
If the fuel does not ignite from the first attempt then the control module automatically
performs second attempt, as the number of ignition attempts are two (defined by the
manufacturer). In case of unsuccessful second attempt it is possible to have gathered
fuel over the main module’s fire-grate. It is necessary to determine and remove the
reason for unsuccessful ignition, as well as to clean the main module’s fire-grate from
the fuel deposits;
