Unico txv-2t-454 Txv Kit 2 Ton R454B Chatleff

Product Description

The UNICO txv-2t-454 is a thermostatic expansion valve kit designed for use with R454B refrigerant in 2-ton cooling systems. The kit includes Chatleff connections, which are required for systems using next-generation A2L refrigerants. A TXV meters refrigerant flow into the evaporator coil based on superheat, maintaining efficient heat exchange across the system's operating range. This valve is installed by licensed HVAC technicians during new equipment installation or when replacing a failed metering device in a Unico high-velocity or small-duct system.

This kit is suited for residential and light-commercial applications where Unico small-duct, high-velocity air handling equipment is paired with R454B-compatible condensing units. The Chatleff connection style is specific to A2L refrigerant systems and ensures proper line-set interface. Compatible systems include Unico 1218 and 2430 units. Technicians working on new-construction or retrofit installations with R454B equipment will find this kit sized and configured for direct use in those platforms.

Key Features

• Rated for 2-ton capacity in R454B refrigerant systems
• Chatleff connections for A2L-compatible refrigerant line-set interface
• Thermostatic expansion valve function for precise superheat and refrigerant metering
• Designed for Unico small-duct high-velocity system platforms
• Kit format includes valve and connection hardware for straightforward installation

Compatibility

Compatible with Unico 1218 and 2430 units using R454B refrigerant.

Installation Notes

Installation must be performed by an EPA Section 608 certified HVAC technician. Recover all refrigerant and isolate the system before removing the existing metering device. Verify Chatleff connections are fully seated and leak-tested after installation. Follow equipment manufacturer guidelines and all applicable local mechanical codes when commissioning R454B systems.

Technical Specifications

• Refrigerant: R454B
• Capacity: 2 ton
• Connection Type: Chatleff

Standard Information

• Brand: UNICO
• Manufacturer Part Number: txv-2t-454