Signs of burner problems: black smoke during combustion.
Possible causes:
1. It may be that the damper is too small, or the position of the combination of the oil nozzle and the pen holder is too forward.
2. It may be that the nozzle is not good or the oil pressure is insufficient, which affects the fuel atomization and causes poor combustion. In addition to the loss of sufficient oil pump or low oil pressure adjustment, it may also be due to the blockage in the oil supply system. Please check the oil filter and clean the oil tank.
3. It may be that the chimney is clogged, or there are bricks falling down in the furnace, which hinders the combustion of the flame. If the burner is a furnace for alloy die-casting machine, the alloy oozing from the boiler carrying the alloy will block the flame and cause black smoke when burning.
4. The volume of the furnace or the diameter of the chimney is too small, which may cause black smoke during combustion. Maybe the selected nozzle is too large. If the oil pressure is adjusted too high, the original volume of the furnace may not be able to accommodate the increased flame, and black smoke will appear during combustion.
5. If the chimney is equipped with baffle, please pay attention to whether it is properly opened. If the chimney is equipped with exhaust fan, please pay attention to whether it is started.
6. It may be the fan of the burner that accumulates a lot of dirt and weakens the combustion air output.
——Author：ebico