Regardless of any type of burner or burner, an ignition process is required. Due to the unfamiliarity with the product performance in actual operation, or the lack of understanding of the basic ignition operation process, our operators may encounter such problems when the burner is initially ignited. Such an ignition failure.
If you don't understand the cause of these failures, you can't find a solution effectively.
Let's analyze them one by one.
Fault 1: The ignition signal is given, but the spark plug does not ignite.
Cause Analysis:
Improper position of ignition electrode, failure of burner controller, failure of ignition transformer, wiring problem.
Solution - Confirm the following conditions:
1. The best distance between the ignition electrode and the ground electrode should be about 2mm.
2. Confirm whether there is voltage output from the burner controller to the power supply terminal of the transformer, and then confirm whether the ignition transformer is intact or whether the wiring is correct.
3. Whether the ignition electrode itself is not well insulated and short-circuited, resulting in no ignition in the ignition area. It is necessary to check the electrode insulation inside the burner.
4. Some types of burner controllers (such as BMU260) have a flame verification function before ignition. If a flame signal has been detected before ignition, it will alarm and not execute the ignition procedure. This function can prevent accidents caused by program misjudgment.
Fault 2: The spark plug can ignite normally, but it still cannot ignite.
Cause Analysis:
Unreasonable gas pressure or even no gas or air.
Solution:
1. A reasonable air-gas ratio is a necessary condition for ignition, which requires us to provide a reasonable air-gas pressure. Different brands and different types of burners require different air and gas pressures. At this time, you should check the relevant technical information or consult the manufacturer.
2. When it is determined that there is gas, the air pressure may not be ignited if it is too high or too low.
3. Generally, the lower the air and gas pressure, the higher the success rate of ignition.
(Taking Beijing Xingdaqi BSIO series 450KW burner as an example, the best state of small fire is: air pressure is between 1.5~2.5mbar, gas pressure is 0.1~0.5mbar.) 4. The pipeline system equipped with air-fuel proportional valve, Due to the low air pressure during ignition, it is often not enough to open the air-fuel ratio valve, so no gas enters the burner. At this time, we need to adjust the spring of the proportional valve to make the proportional valve open to a certain degree, allowing a small stream of gas to participate in the ignition.
5. The proportional valve equipped with a bypass hole should adjust the bypass volume, such as the RAG proportional valve of the Italian Elektrogas brand.
Fault 3: It was on fire, but it went out soon.
Cause Analysis:
The flame signal is unstable or there is a problem with the flame detection circuit.
Almost all burner controllers nowadays (such as SFD258 or BMU260) have flame detection and flameout protection functions, if a flame is detected within the ignition safety time, the solenoid valve will remain open. If there is no flame signal back to the controller or the signal is unstable within the ignition safety time, the gas solenoid valve will be cut off quickly and a fault signal will be output.
Solution:
1. Observe whether the flame is stable, and adjust the air and gas pressure to make the flame stable.
2. Check the flame monitoring signal circuit.
UV ultraviolet monitoring method:
Check whether the UV flame detector is aimed at the flame, whether there is any foreign object blocking, whether the wiring is correct, and replace the UV flame detector if necessary.
Ionization detection method:
Check whether the installation position of the detection electrode is correct, whether the flame monitoring circuit is unblocked, check the electrode cap, and if necessary, remove the electrode cap and connect the high-voltage wire to the electrode directly for a try.
In the ionization detection mode, the flame feedback signal can be measured by a microammeter.
Method: Use a microampere ammeter, one end is connected to the monitoring electrode, and the other end is connected to the flame feedback signal circuit of the burner controller to check whether there is a µA current passing through, which is required to be greater than the threshold current of the controller (generally greater than 2 µA).
Regardless of any type of burner or burner, an ignition process is required. Due to the unfamiliarity with the product performance in actual operation, or the lack of understanding of the basic ignition operation process, our operators may encounter such problems when the burner is initially ignited. Such an ignition failure.
If you don't understand the cause of these failures, you can't find a solution effectively.
Let's analyze them one by one.
Fault 1: The ignition signal is given, but the spark plug does not ignite.
Cause Analysis:
Improper position of ignition electrode, failure of burner controller, failure of ignition transformer, wiring problem.
Solution - Confirm the following conditions:
1. The best distance between the ignition electrode and the ground electrode should be about 2mm.
2. Confirm whether there is voltage output from the burner controller to the power supply terminal of the transformer, and then confirm whether the ignition transformer is intact or whether the wiring is correct.
3. Whether the ignition electrode itself is not well insulated and short-circuited, resulting in no ignition in the ignition area. It is necessary to check the electrode insulation inside the burner.
4. Some types of burner controllers (such as BMU260) have a flame verification function before ignition. If a flame signal has been detected before ignition, it will alarm and not execute the ignition procedure. This function can prevent accidents caused by program misjudgment.
Fault 2: The spark plug can ignite normally, but it still cannot ignite.
Cause Analysis:
Unreasonable gas pressure or even no gas or air.
Solution:
1. A reasonable air-gas ratio is a necessary condition for ignition, which requires us to provide a reasonable air-gas pressure. Different brands and different types of burners require different air and gas pressures. At this time, you should check the relevant technical information or consult the manufacturer.
2. When it is determined that there is gas, the air pressure may not be ignited if it is too high or too low.
3. Generally, the lower the air and gas pressure, the higher the success rate of ignition.
(Taking Beijing Xingdaqi BSIO series 450KW burner as an example, the best state of small fire is: air pressure is between 1.5~2.5mbar, gas pressure is 0.1~0.5mbar.) 4. The pipeline system equipped with air-fuel proportional valve, Due to the low air pressure during ignition, it is often not enough to open the air-fuel ratio valve, so no gas enters the burner. At this time, we need to adjust the spring of the proportional valve to make the proportional valve open to a certain degree, allowing a small stream of gas to participate in the ignition.
5. The proportional valve equipped with a bypass hole should adjust the bypass volume, such as the RAG proportional valve of the Italian Elektrogas brand.
Fault 3: It was on fire, but it went out soon.
Cause Analysis:
The flame signal is unstable or there is a problem with the flame detection circuit.
Almost all burner controllers nowadays (such as SFD258 or BMU260) have flame detection and flameout protection functions, if a flame is detected within the ignition safety time, the solenoid valve will remain open. If there is no flame signal back to the controller or the signal is unstable within the ignition safety time, the gas solenoid valve will be cut off quickly and a fault signal will be output.
Solution:
1. Observe whether the flame is stable, and adjust the air and gas pressure to make the flame stable.
2. Check the flame monitoring signal circuit.
UV ultraviolet monitoring method:
Check whether the UV flame detector is aimed at the flame, whether there is any foreign object blocking, whether the wiring is correct, and replace the UV flame detector if necessary.
Ionization detection method:
Check whether the installation position of the detection electrode is correct, whether the flame monitoring circuit is unblocked, check the electrode cap, and if necessary, remove the electrode cap and connect the high-voltage wire to the electrode directly for a try.
In the ionization detection mode, the flame feedback signal can be measured by a microammeter.
Method: Use a microampere ammeter, one end is connected to the monitoring electrode, and the other end is connected to the flame feedback signal circuit of the burner controller to check whether there is a µA current passing through, which is required to be greater than the threshold current of the controller (generally greater than 2 µA).