The kit is for indoor coil/air handler use (i.e., the evaporator side) in matched systems using R‑454B refrigerant.
Size range:3.5 ‑ 4.0 ton(this relates to the matched outdoor/indoor system capacity) with the specific R‑454B metering kit.
Because it’s for R‑454B (an A2L mildly flammable refrigerant), extra care is needed in installation: proper leak detection, brazing, nitrogen purge, correct service practices.
The kit will include the TXV body, bulb/sensing element, possibly manifold adapters, orifices or other applicable components needed for R‑454B conversion/installation.
Compatibility: Must match the coil/air handler model, refrigerant, and capacity; using the wrong metering device will lead to improper refrigerant flow, reduced efficiency, or could damage the system.
