Vaillant VR 34 0-10 Volt Coupler

A 0–10 volt coupler ecoTEC for and ecoCRAFT that transfers a voltage input from the BEMS equipment into a temperature set point for the boiler.

The VR 34 also has a 24 Volt fault signal output in the event of a boiler failure, this will remain active until the fault is cleared and the boiler reset. The VR 34 also has an LED to indicate operation.