The weather-compensated controller Siemens RVD 125/109-A (RVD125/109-A) is a multifunctional device for district heating transfer stations, designed to regulate the temperature of the heating water and manage the preparation of domestic hot water. The regulation is based on the outdoor temperature (weather-compensated), or possibly influenced by room temperature or according to room temperature.

The controller allows for the selection of the device type, which activates the necessary functions and settings for a specific application. It is operated via a clear display and a system of operational lines, with the nominal desired room temperature set using a rotary knob.

Main Features

• Weather-compensated control of heating water temperature based on outdoor temperature
• Possibility of control influenced by room temperature / room control (with a compatible room device)
• Control of valves and pumps for the heating circuit and DHW preparation
• Functions for comfortable operation: time programs, ECO logic, and frost protection
• Communication Modbus RTU (RS485) for integration into superior systems

Technical Specifications