Glossary For Fire Alarm

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This is an ALARM SYSTEM that is not connected to a CENTRAL STATION, but is designed to activate a local OUTPUT DEVICE like a siren or bell.

LOW AIR ALARM (or SUPERVISORY): A condition in a DRY PIPE SPRINKLER SYSTEM in which the air pressure has fallen below a pre-set level. This is utilized to warn the building's occupants that the system's air compressor may be compromised (or the power to the unit may be turned off) and a further reduction in pressure may cause the system to TRIP.

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