Aspen a2l4sb A2L Refrigerant Detection Rds Kit R454B

Product Description

The ASPEN a2l4sb is an A2L refrigerant detection system (RDS) kit engineered specifically for R454B refrigerant installations. The kit provides a complete solution for code-compliant detection and mitigation of A2L refrigerant leaks in residential and light-commercial HVAC systems. It includes a refrigerant sensor and a mitigation device, fulfilling the full installation requirement under UL 60335-2-40. When activated, the system connects through the 24-volt connection on the furnace, shuts down the condenser, and energizes the furnace blower to dilute refrigerant concentration below the flammability limit. Licensed HVAC technicians performing new installations or retrofits of R454B systems are the primary installers.

The a2l4sb is formulated for R454B applications and is compatible with all Aspen coils. It is suited for residential split systems and light-commercial equipment utilizing R454B as the working refrigerant. The kit design accommodates flexible installation configurations, making it appropriate for a range of field conditions. Kits with relay functionality also support optional control of additional equipment or accessories connected to the system.

Key Features

• Certified to UL 60335-2-40 for A2L refrigerant detection and mitigation compliance
• Optimized specifically for R454B to minimize nuisance and false alarms
• Connects through the 24-volt furnace connection using provided field wiring
• Activates condenser shutdown and furnace blower engagement upon refrigerant detection
• Compatible with all Aspen coils
• Optional relay functionality for control of additional accessories or equipment

Compatibility

Compatible with all Aspen coils. Designed for HVAC systems using R454B refrigerant that require A2L detection and mitigation per UL 60335-2-40. Suitable for use with 13-inch wide drain pans.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with A2L refrigerant safety requirements and local mechanical codes. Disconnect power to the system before wiring the sensor and mitigation device. Follow the provided field wiring instructions to connect the kit through the 24-volt furnace terminal. Verify all connections and sensor placement comply with UL 60335-2-40 and applicable local codes before returning the system to service.

Technical Specifications

• Refrigerant Type: R454B
• Control Voltage: 24 volts
• Certification: UL 60335-2-40
• Suitable For Use With: 13 inch Wide Drain Pans

Standard Information

• Brand: ASPEN
• Manufacturer Part Number: a2l4sb