York S1-2AC06700124 A2L Refrigerant Detection System

The York S1-2AC06700124 is an A2L refrigerant detection system (RDS) designed to provide critical safety monitoring for HVAC equipment using mildly flammable A2L refrigerants such as R-32, R-454B, and R-1234yf. This system is required by UL 60335-2-40 safety standards for residential and light commercial HVAC equipment containing more than 4 pounds of A2L refrigerant charge in occupied spaces.

Key Features:

• Detects A2L refrigerant leaks at concentrations below 25% of the Lower Flammability Limit (LFL)
• Triggers automatic mitigation measures including compressor shutdown and fan activation to disperse refrigerant
• Self-diagnostic testing performed at least once per hour to ensure system reliability
• Factory-calibrated for specific A2L refrigerants listed on equipment nameplate
• Designed for long-term reliability over the lifetime of HVAC equipment
• Compatible with both 24V and communicating HVAC system controls

When a refrigerant leak is detected above the preset threshold, the RDS immediately de-energizes the compressor and other electrical devices while activating the indoor fan to safely disperse and dilute the refrigerant concentration. The system continuously monitors for refrigerant presence and automatically returns to normal operation once safe conditions are restored. This genuine York OEM component ensures compliance with current safety regulations while providing essential protection for systems transitioning to environmentally-friendly, lower-GWP refrigerants.