What do excessive vacuum readings typically indicate?

Excessive vacuum readings generally indicate an obstruction in the suction line. When there is too much vacuum or negative pressure, it suggests that the flow of oil is being restricted, which can happen due to blockages or restrictions in the piping that draws oil from the tank to the burner. This condition can lead to inadequate oil delivery to the burner, causing operational issues like flame instability or even complete burner shutdown.

Understanding this relationship is crucial for oil burner operators, as recognizing the symptoms of obstructions can help maintain proper burner function and prevent larger mechanical failures. By monitoring vacuum readings, operators can troubleshoot and resolve issues with the oil delivery system efficiently.