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Siemens RAA20U Room Thermostat W/Exposed Knob Heat/Cool 24V

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Special Price $37.56 Regular Price $48.83
In stock
SKU
RAA20U
The Siemens RAA20U Room Temperature Controller is a versatile, user friendly device for controlling temperature in heating and cooling systems. This controller exposes the knob, and users only need to move it to set the ideal room temperature. It’s easy to make manual adjustments. Action that runs on 24V efficiently controls HVAC equipment. In residential and commercial HVAC systems this device is often used to maintain constant and comfortable interior temperatures. It easily interfaces with heat pumps, air conditioners and furnaces. Its simple design and dependable for Accurate temperature control by the system lowers energy consumption and exacts operational costs with its accurate temperature control and when its temperature is low it helps reduce the amount of times.
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Specifications

  • Weight: 0.44 lbs
  • Type: Knob
  • Voltage: 24 V
  • Switch Action: SPDT

Product Overview:
Room temperature regulation is essential for maintaining comfortable indoor conditions in residential, commercial, and light industrial environments. The Siemens RAA20U Room Thermostat W/Exposed Knob Heat/Cool 24V is an OEM electromechanical thermostat designed for heating-only or cooling-only applications. Its exposed rotary setpoint knob allows occupants to adjust the desired room temperature, while its gas-diaphragm sensing mechanism responds to changes in indoor temperature.

Temperature Sensing and Switching:
A gas-filled diaphragm responds to room temperature changes and operates the thermostat's switching contacts. When room temperature falls below the selected setting, the heating contact closes. In cooling applications, the cooling contact closes when room temperature rises above the selected setting.

Exposed Setpoint Adjustment:
The front-mounted rotary knob allows direct adjustment of the desired room temperature. Its dual Fahrenheit and Celsius scale supports convenient temperature selection, while adjustable upper and lower limit stops restrict the available setpoint range when required.

Replacement Guidelines:
Replace the Siemens RAA20U if room temperature regulation becomes inaccurate, the rotary adjustment knob stops responding, or the switching contacts fail to operate correctly. Have a qualified HVAC technician inspect the thermostat, mounting arrangement, wiring connections, and associated control circuit before replacement. Verify heating or cooling operation and temperature adjustment after installation.

Common Signs of Wear:

  • Heating or cooling equipment fails to respond to temperature changes.
  • Rotary setpoint knob becomes difficult to operate.
  • Switching contacts fail to open or close correctly.
  • Intermittent HVAC operation.
  • Damaged thermostat housing or electrical terminals.

Equipment Compatibility:
The Siemens RAA20U is intended for HVAC systems requiring a 24V heat/cool room thermostat with an exposed adjustment knob. This OEM thermostat is designed for applications specifying these control features. Verify the required voltage, heating and cooling arrangement, and thermostat adjustment style against the equipment documentation before purchasing.

Technical Specifications:
Manufacturer: Siemens
Part Number: RAA20U
Product Type: Room Thermostat
Operating Voltage: 24

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Product Questions (5)
Customer Questions
What is the purpose of the Siemens RAA20U room thermostat?

The Siemens RAA20U regulates room temperature by controlling connected heating or cooling equipment according to the selected setpoint. Its exposed adjustment knob allows occupants to change the desired indoor temperature directly.

How does the gas-diaphragm sensing mechanism respond to room temperature changes?

The gas-filled diaphragm responds to temperature variations and operates the thermostat's switching contacts to control the connected heating or cooling circuit.

What is the function of the exposed adjustment knob on the Siemens RAA20U?

The exposed knob provides a clearly accessible interface for changing the desired room temperature setting. Its manual adjustment design eliminates the need for a digital display or programmable menu.

What temperature scales are available on the Siemens RAA20U adjustment dial?

The adjustment dial features Fahrenheit and Celsius scales for temperature selection.

How do the upper and lower setpoint limit stops affect temperature adjustment?

The adjustable limit stops restrict the available setpoint range, helping prevent adjustments beyond the permitted temperature settings.