Trane 5AYTXVH3A4248A Txv Kit R-454B 3.5 to 4 Ton Coil and Air Handler

Product Description

The Trane 5AYTXVH3A4248A is a thermostatic expansion valve (TXV) kit engineered for use with R-454B refrigerant in residential and light-commercial split systems. The TXV meters refrigerant flow into the evaporator coil, maintaining optimal superheat across varying load conditions to protect the compressor and sustain system efficiency. Rated for 3.5 to 4 ton capacity, this kit is designed for installation at the coil or air handler and weighs 1 pound. Licensed HVAC technicians perform this work as part of refrigerant-side service or system conversion to lower-GWP R-454B refrigerant.

This kit is intended for coil and air handler applications rated at 3.5 to 4 tons nominal capacity using R-454B refrigerant. It is listed in Trane installer documentation alongside part numbers 5AYTXVH3A1836A and 5AYTXVH3A6000A, indicating its place within a tiered TXV kit series covering multiple capacity ranges. Typical installations occur during equipment startup, refrigerant system conversion, or TXV replacement service on compatible Trane and American Standard coil and air handler assemblies.

Key Features

• Rated for 3.5 to 4 ton nominal capacity systems
• Designed specifically for R-454B low-GWP refrigerant
• OEM Trane kit format — includes components required for coil and air handler installation
• Compact valve body: 3.73 inches long, 2.95 inches tall, 3.34 inches deep
• Lightweight at 1 pound for easy handling during service
• Part of a documented TXV kit series spanning multiple tonnage ranges per Trane installer guidance

Compatibility

Designed for use with Trane and American Standard coil and air handler assemblies rated at 3.5 to 4 tons nominal capacity and charged with R-454B refrigerant. Referenced in Trane installer documentation 18-HE141D1-1A-EN alongside kit numbers 5AYTXVH3A1836A and 5AYTXVH3A6000A.

Installation Notes

Installation must be performed by an EPA 608-certified HVAC technician. Recover all refrigerant from the system before opening any refrigerant circuit, following applicable federal, state, and local regulations. Confirm system power is off and capacitors are discharged before beginning work. Follow Trane installer documentation and all applicable national, state, and local codes throughout the installation process.

Technical Specifications

• Nominal Capacity: 3.5 to 4 ton
• Refrigerant Type: R-454B
• Overall Length: 3.73 inches
• Overall Height: 2.95 inches
• Overall Depth: 3.34 inches
• Weight: 1 pound
• Application: Coil and Air Handler

Standard Information

• Brand: Trane
• Manufacturer Part Number: 5AYTXVH3A4248A