Hooked up the VR66 today - I think it's working!

Just want to confirm though - how do you know the HW demand has been activated? I see the tap symbol flashing on the front display and d.22 Hot water demand = 1. And the boiler is in S.24.

I thought d.5/d.9 would show 80 degrees, but they do not. They continue to show the lower flow temps dictated by the weather comp.