In the event of igniting a furnace with too much oil in the combustion chamber, what should be done?

In the situation where there is an excess of oil in the combustion chamber of a furnace, reducing the airflow is the correct response. This action helps to minimize the oxygen available for combustion, which can prevent a potentially hazardous situation from worsening. When there is too much oil, it can lead to incomplete combustion and the risk of backfiring or puffbacks, both of which can be dangerous and damaging to the system.

Reducing airflow allows for a controlled combustion environment where the excess fuel can be properly managed and minimized. This approach is crucial in preventing volatile reactions that could result from excessive fuel. It aids in achieving a better fuel-to-air ratio, thereby promoting safer operation and enhancing the overall efficiency of the furnace.

Approaches such as increasing airflow, shutting off the power, or allowing it to burn off could lead to unsafe conditions or are not effective in managing the immediate issue of excess oil in the combustion chamber. Therefore, reducing airflow is the best choice for safely addressing this situation.