What condition does a fire alarm bell typically indicate?

A fire alarm bell is primarily designed to indicate a water flow condition in a fire protection system. When the system detects water flow due to an activated sprinkler head or a similar event, the fire alarm bell produces an audible alert. This serves as a crucial warning mechanism to notify occupants of a potential fire situation that necessitates immediate action.

Water flow indicators are vital for ensuring that the fire protection system is functioning correctly. They signify that the system is engaged and that water is being delivered to combat potential flames, thereby indicating a possible emergency that requires attention.

While smoke detection and heat detection are critical aspects of fire alarm systems, they are typically indicated through different means, such as alarms or visual indicators unique to those functions, rather than through the sound of a bell. Therefore, understanding the specific purpose of the alarm bell in relation to water flow conditions is essential.