[OpenTRV-interest] Question from Steve R

Stuart Poulton stuart at poulton.org.uk
Sun Nov 22 11:34:29 GMT 2015

On 22 Nov 2015, at 11:31, Damon Hart-Davis <dhd at exnet.com> wrote:

>> On 22 Nov 2015, at 11:27, Mark Wigmore <mawigmore at gmail.com> wrote:
>> My goal would be (eventually) to have feedback from each TRV as to it's valve position, and regulate the flow temp accordingly. That way, under light heating load, the flow can stay up a bit but at low temperature - avoiding the "rad cold but for a small (very) hot spot at one end" effect. Or depending on the setup, avoiding the noisy system pumping water round through the bypass because the stupid boiler design* can't cope with normal heating loads.
> OpenTRV already routinely sends back valve open position to the boiler controller.
> This is a rather overloaded diagram for my own analysis, but the blue crosses show valve position:
> http://www.earth.org.uk/out/daily/occBV.png


Looks great, but

1 - Whats the actual room temperature doing
2 - Whats the scale along the bottom ? If it’s time in minutes, 00:15 to 00:23 then imho the valve is far too active ?


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