Trane 5AYTXVH3A1836A Txv Kit 1.5 to 3 Ton R-454B Coil and Air Handler

Product Description

The Trane 5AYTXVH3A1836A is a thermostatic expansion valve (TXV) kit rated for 1.5 to 3 ton systems and designed specifically for use with R-454B refrigerant. The TXV meters liquid refrigerant entering the evaporator coil, allowing only the precise volume needed to ensure full evaporation before the suction line. This prevents liquid slugging at the compressor and supports consistent system efficiency across the rated tonnage range. The kit is intended for installation on coil and air handler applications and is installed by licensed HVAC technicians during new equipment commissioning or refrigerant-system retrofits requiring R-454B compatibility.

This TXV kit is rated for residential and light-commercial split systems in the 1.5 to 3 ton capacity range that operate on R-454B refrigerant. It is identified in Trane installer documentation under guide 18-HE141D1-1A-EN as one of three tonnage-specific TXV kits in the R-454B series. It is also marketed under the American Standard brand, reflecting the shared Trane International platform. Typical install scenarios include new coil installations paired with R-454B-rated condensers or heat pumps, as well as coil replacements where the system refrigerant type has been updated.

Key Features

• Rated for 1.5 to 3 ton systems — covers the most common residential and light-commercial tonnage range
• Designed specifically for R-454B refrigerant, the A2L low-GWP replacement entering the residential market
• Meters liquid refrigerant precisely at the evaporator coil inlet to prevent flood-back and support full evaporation
• Can be mounted in any orientation on the evaporator coil inlet for flexible installation
• OEM Trane kit format — includes components matched to coil and air handler applications
• Also sold under the American Standard brand on the same Trane International platform

Compatibility

Designed for Trane and American Standard coil and air handler systems in the 1.5 to 3 ton range using R-454B refrigerant. Referenced in Trane installer guide 18-HE141D1-1A-EN alongside companion kits 5AYTXVH3A4248A and 5AYTXVH3A6000A for other tonnage ranges. Select the TXV to match both system tonnage and refrigerant type.

Installation Notes

Installation must be performed by an EPA 608-certified HVAC technician. Shut down the system and recover all refrigerant in accordance with EPA regulations before opening any refrigerant circuit. Follow all national, state, and local codes as required by Trane installer guide 18-HE141D1-1A-EN, which ships with compatible equipment. Do not mix refrigerant types — this valve is rated for R-454B only and must not be used with R-410A or other refrigerants.

Technical Specifications

• Refrigerant Type: R-454B
• System Capacity Range: 1.5 to 3 ton
• Application: Coil and air handler
• Weight: 1 pound

Standard Information

• Brand: Trane
• Manufacturer Part Number: 5AYTXVH3A1836A