the 066538 is the official updated version from Emerson Alco

It features a compact footprint and integrates seamlessly with plug-together connectors

Universal Power Options: Reliable operation via 24V AC hardwire or battery backup ensures settings are preserved during power interruptions

it ensures your heating or cooling equipment operates at factory-specified efficiency levels

When you're servicing large-scale commercial condensers or heat pumps

Johnson Controls A70AA-16 Temperature Control R-410A the 066538 is the officialFor veteran HVACR contractors, the Johnson Controls A70AA 16 Temperature Control is a standard issue solution for heavy duty refrigeration and heating limit applications. Designed as a single pole, single throw (SPST) device, this controller is engineered to open low, breaking the circuit on a temperature drop to prevent coil freeze up or maintain specific thermal boundaries. Operating on 120 240 Vac, it provides high capacity switching for