Automatic toilets are programmed to ignite the burner ______.

Automatic toilets are programmed to ignite the burner in low fire. This setting is essential because it allows for a gradual increase in temperature and minimizes the risk of thermal shock to the boiler components.

Starting the burner in low fire ensures that the burner operates safely and efficiently, especially when the water temperature is low and requires heating. This mode helps in achieving the desired temperature without sudden changes that could stress the system or lead to excessive steam production, which might then trigger safety mechanisms.

Low fire operation also conserves fuel during periods of low demand, as it allows for a more controlled heating process before transitioning to higher fire rates if necessary. This method aligns with best practices for energy efficiency and prolongs the longevity of the heating components of the system.