the magnet is energized by millivoltage from a thermocouple

Using it with R22 will result in incorrect superheat and potential system damage

minimizing downtime during routine service calls

While the cast iron Series B is durable

The Trane TCONT103 can be hardwired via a "C" wire for 24VAC power but also features battery backup to maintain settings during local power interruptions

Carrier P201-4901 Transformer 319848-301 the magnet is energized byThe Carrier P201 4901 Transformer is a high capacity, multi tap HVAC control transformer engineered for versatile primary power applications in commercial and residential systems. Designed to deliver a consistent 24V secondary output, this 100VA transformer supports heavy duty control circuits, including multi stage cooling and heating systems that exceed the power draw of standard 40VA units. Its multi tap primary configuration allows for seamless