Siemens Building Technology 141-0520 Temperature Control Refrigerant What does 'Direct Acting' mean

What does 'Direct Acting' mean for this model

Durable Construction: Built with a cast iron valve body and corrosion-protected cases (e-coated or primed with enamel) for long-term reliability in varying environments

The Copeland 918-0518-00 Crankcase Heater is a critical 120V insertion-style heating element designed for Copeland semi-hermetic compressors

and use a backup wrench if necessary to secure the fitting without stressing the distribution assembly

The 5H0806890000 is the updated manufacturer part number

Siemens Building Technology 141-0520 Temperature Control Refrigerant What does 'Direct Acting' meanThe Siemens 141 0520 is a rugged, line voltage remote bulb thermostat designed for high accuracy temperature regulation in commercial HVACR applications. Engineered as a two position electric controller, this unit features a single pole, double throw (SPDT) snap acting switch housed in a heavy duty gray baked enamel galvanized steel casing. With a temperature range of 20F to 120F and an adjustable differential of 3. 5F to 14F, it provides precise on