Raa31- SIEMENS - RAA31
  • Raa31- SIEMENS - RAA31

Raa31- SIEMENS - RAA31

RAA31/SI
€20.59
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Colissimo Delivery expected from 2026-09-24

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The RAA31 thermostat: a solution for heating or solo air conditioning


The Siemens RAA31 room thermostat operates on an on/off basis, with a supply voltage of 24-250 VAC.
It maintains a constant room temperature, whether with heating or air conditioning systems. It is usually installed in residential or light industrial buildings.
The Siemens RAA31 can be used on zone valves, thermal valves, burners (oil or gas), fans or pumps.


Siemens products compatible with the RAA31 thermostat


To optimise your system, use a range of Siemens products that are perfectly compatible with the RAA31 thermostat:
Siemens electromotoric actuators:



  • SFA21: On/off electric actuator
  • STA21: Thermal actuator for radiator valves
  • STP21: Thermal actuator for valves with a 2.5 mm stroke

Adapter plates for the RAA31:



  • ARG70: 120 x 120 mm adapter plate for a 4" x 4" flush-mounted box
  • ARG70.1: 96 x 120 mm adapter plate for a 2" x 4" flush-mounted box
  • ARG70.2: Adapter plate for surface-mounted wiring, 112 x 130 mm

Technical specifications of the Siemens RAA31



  • Voltage: 24 - 250 VAC
  • Current 0.2 - 6 (2)A
  • Frequency 50 or 60 Hz
  • Screw terminals for 2 x 1.5 mm² wires (min. 0.5 mm²)
  • SD differential - 1 K
  • Control range 8 - 30°C
  • Operation in accordance with IEC 721-3-3
  • Environmental conditions: Class 3K5
  • Temperature 0+50 °C
  • Humidity < 95 % relative
  • Normal level of contamination, in accordance with EN 60 730


Features of product: RAA31- SIEMENS - RAA31

Package Weight (kg)
0.192
Package Height (m)
0.055
Package Width (m)
0.1
Package Length (m)
0.105

The Keys to Siemens Regulation: From Sensor to Actuator

In building management systems (BMS), Siemens components are essential for automation. A high-performance system relies on seamless communication between the measuring device and the control element.

1. Siemens Thermostat: Measurement and Comfort

The Siemens thermostat is the dialogue point between the user and the heating system. It is not just used to display the temperature but also to finely control heating, often through sophisticated protocols.

We provide wired or wireless programmable room thermostats, essential for managing independent heating zones and optimizing time slots. Choosing the right model ensures precise settings (+/- 0.5°C), directly translating into savings.

2. Siemens Actuator: Action and Efficiency

The Siemens actuator is the hydraulic actuator. Its role is to precisely position valves (mixing valves or zone valves) in order to control the flow of hot water to a given circuit.

As the centerpiece of the heating zone, it must be fully compatible with the regulation electronics (0-10V signal, 3 points) and the valve it is mounted on. Replacing a faulty actuator allows for immediate restoration of optimal control over the water mix (supply/return) and avoids unnecessary overheating.

Advice for Identification and Compatibility

With Siemens' extensive and highly technical range, it is vital to check the specifications of the part to be replaced:

  • Product reference: Always rely on the 7 or 8 character code on the label (e.g., RDE10.1). This code determines the function, voltage, and communication protocol.

  • For Actuators: Check the power (torque) and stroke duration (opening/closing time) to ensure it can move your valve.

Expert Tip: When replacing a Siemens thermostat or a Siemens actuator, check the configuration of the dip switches or the initial programming. Incorrect calibration of the zero point or end stroke can lead to malfunctions, even if the part is new.

Ensure the reliability of your regulation system with ExpertByNet, the specialist in Siemens components for HVAC.

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