A refrigerant detector alarm is a safety device that continuously monitors for refrigerant leaks in HVAC systems, automatically triggering alarms and equipment shutdown when concentrations reach hazardous levels. Required by ASHRAE 15 in machinery rooms and certain high-charge systems, these detectors protect occupants and technicians from exposure to toxic or flammable refrigerants. Electronic sensors detect specific refrigerant chemicals.
Detection Technology
Modern detectors use catalytic, infrared, or heated-element sensors calibrated for specific refrigerant types (R-410A, HFOs, etc.). Sensors continuously sample air, triggering alarms at 25 percent of ASHRAE 15 exposure limits. Dual-sensor systems improve reliability. Detectors integrate with building automation systems, enabling remote monitoring and documentation of alarm events.
Installation and Maintenance
ASHRAE 15 mandates proper detector placement near potential leak sources and exhaust ventilation. Detectors must activate mechanical ventilation systems and shut down compressors within 30 seconds. Regular calibration (annually or per manufacturer specifications) ensures accurate detection. Technicians must understand alarm responses and emergency procedures to protect occupants during refrigerant incidents.