this unit features a hermetically sealed black Bakelite case that provides a permanent barrier against oil

ensuring seamless integration into existing HVACR and boiler systems

and 230V HVAC systems

as a replacement assembly

the "C" suffix typically denotes retail or bulk packaging variations but the physical specifications and performance ratings remain the same

IO Hvac Controls iO-WWPC Pressure Switch 321702-401 this unit features a hermeticallyThe iO WWPC is a compact encapsulated pressure control specifically engineered for high performance monitoring in HVACR refrigeration systems. Designed for direct mounting on the liquid line Schrader valve, this manual reset pressure switch provides critical protection against equipment damage caused by loss of refrigerant charge or excessive pressure fluctuations. Built with a snap action diaphragm, the iO HVAC Controls iO WWPC ensures precise, non