Vaillant VSMART: how to turn off weather compensation?

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OP appears to have found a way to trick it into believing it's located elsewhere.

I have no idea as I don't have vSMART. I'm considering it, just trying to find out more about how it all operates.

My concern is that the 2 port motorised valves (in S plan configuration) will be driven open by the VR66 module. But there is no check to see that the valves actually open successfully. Therefore boiler could be pumping against a closed valve?
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