Firstco 9EVRA2L-5 A2L Refrigerant Leak Mitigation Sensor for Fan Coil Units

The Firstco 9EVRA2L-5 is an A2L refrigerant leak mitigation sensor designed for use with First Co. fan coil and air handler units charged with mildly flammable A2L-class refrigerants. This field-installed sensor is a required safety component under UL 60335-2-40 for systems containing refrigerants such as R-454B or R-32, ensuring compliance with current HVAC safety standards.

When installed, the sensor continuously monitors the air handler's indoor environment for refrigerant concentration. If a leak is detected above the threshold level, the sensor signals the mitigation control board to initiate protective actions — including shutting down the compressor to stop refrigerant flow and activating the indoor blower fan to dilute and dissipate any leaked refrigerant, preventing hazardous accumulation in occupied spaces.

Key Features:

• Designed specifically for A2L-class refrigerants (e.g., R-454B, R-32)
• Field-installed mitigation sensor compatible with First Co. fan coil and air handler systems
• Triggers compressor shutoff and continuous blower operation upon leak detection
• Supports compliance with UL 60335-2-40 safety standard requirements
• Required for A2L systems exceeding applicable refrigerant charge thresholds
• Hardwired installation with relay output signal to mitigation PCB

The Firstco 9EVRA2L-5 mitigation sensor is an essential safety accessory for any First Co. HVAC system transitioning to or operating with next-generation low-GWP A2L refrigerants. Always refer to the applicable First Co. Installation and Operation Manual (IOM) for proper placement and wiring requirements.