You must always use the reset type specified by the manufacturer

including chillers

Industrial-Grade Construction: Designed to withstand the thermal stresses of high-duty cycle heating applications

This part serves as a direct fit for several Bryant

Per the product specifications

Trane CNT4820 Limit 321042-401 You must always use theThe Trane CNT4820 is a specialized bi metal disc limit switch designed for critical thermal protection in heating and cooling systems. Engineered as a normally closed (N C) safety control, this SPST (Single Pole Single Throw) device features an auto reset (A R) function, ensuring the circuit automatically closes once temperatures return to a safe range below the 155F open temperature. As an HVAC high limit switch, the CNT4820 is built to handle the