Before lighting a burner in a steam boiler, ensure that:

Ensuring that there is water in the boiler before lighting a burner is crucial for safe operation. A steam boiler needs to have an adequate water supply to generate steam and avoid overheating. If the boiler is lit without sufficient water, it can lead to a condition known as dry firing, which can cause severe damage to the boiler and create a risk of explosions or other safety hazards. The water serves as a coolant, helping to transfer heat and maintain the structural integrity of the boiler components.

While adjusting the temperature controller, turning on the main burner test firing valve, and ensuring that safety valves are operational are important steps in the overall process of preparing a boiler for operation, the primary concern before igniting the burner is to confirm that there is a safe level of water present. This foundational step mitigates many risks associated with boiler operation and is a fundamental part of safe boiler management practices.