It is possible to use OpenTherm bus like power supply, but it additionaly load for bus.texnic wrote:I've maybe a stupid question, please excuse my ignorance: why does this setup need a power supply, if OpenTherm provides the power from the boiler? Would it be possible to use that power?
Also, what do I connect to the 4 orange terminals? I currently have a single 2-wire cable running between an OpenTherm boiler and a Honeywell Round Modulation thermostat.
Two terminals on right side - to connect the thermostat, left side - to connect the boiler.