AThermostatic Expansion Valve (TXV) Kitdesigned for use with indoor coils or air handlers sized1.5‑3 tons, specifically on systems using the refrigerant R‑454B.
The listed part number for that capacity isOXBOX 5AYTXVH3A1836A(shown in the OXBOX submittal sheet).
Typical use: When you’re converting or installing an air handler/coil system for R‑454B refrigerant, replacing the standard orifice or incongruent metering device with a TXV kit ensures proper refrigerant metering and system performance.