Salus RT520RF Wireless Controller, surface-mounted temperature controller, OpenTherm - weekly. The surface-mounted controller is used for wireless control of heating devices. Its function is to maintain comfortable conditions in the room according to the work schedule or a constant temperature set by the user.

The receiver is connected to the boiler. Control can be done in two ways:

• starting the heat source by closing the contacts on the heating device, equipped with an input for connecting an ON/OFF thermostat
• adjusting the boiler power via communication through the OpenTherm protocol (OT+ 4.0)

The two-way communication between the boiler and the controller and the modulation of the boiler power ensure maximum efficiency and comfort. The controller automatically detects the OT+ 4.0 protocol, displays the boiler error codes, and allows you to set the DHW temperature.

Product features:

• Choice of hysteresis selection or built-in TPI algorithm for all types of heating work according to schedules
• Service mode protected by maximum/minimum temperature limitation PIN code
• Unique transmission codes
• Operates at a frequency of 868 MHz - stable and interference-resistant signal

Technical data:

• Transmitter power supply: 2 x AA alkaline batteries
• Receiver power supply: 230V AC 50 Hz
• Maximum receiver load: 16 (5) A
• Output signal: OpenTherm or voltage-free COM/NO relay
• Temperature setting range: 5 - 33.5 0°C
• Temperature accuracy: 0.1°C or 0.5°C
• Control algorithm: TPI or Hysteresis ±0.25°C or ±0.5°C
• Communication: Wireless, 868 Mhz
• Dimensions [mm]: Transmitter 118 x 6, 95 x 96 x 96 x 27