The Siemens RAA21 room thermostat is designed for on/off temperature control in heating or cooling systems. It features a straightforward 2-position control and is suitable for residential and small industrial applications. The thermostat can operate zone or thermal valves, gas or oil burners, fans, and pumps. It is equipped with separate outputs for heating and cooling, ensuring precise temperature control based on the setpoint. The thermostat operates with an AC 24–250 V supply voltage and provides reliable temperature regulation.

Key Features:

• On/Off control for heating or cooling
• Operating voltage: AC 24–250 V
• Separate outputs for heating and cooling
• Ideal for residential and small industrial applications
• Compatible with zone or thermal valves, gas or oil burners, and fans

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