Having a bit of difficulty in getting this to work!
I have a uh4 heatmiser and a vaillant vr71
Currently ls and lr from the heatmiser are wired to s7 on the vr71 as per instruction from vaillant technical and s6 is bridged.
Demand from the ufh system does not cause the boiler to fire.
Neither vaillant nor heatmiser seem able to advise further. Can anyone suggest please?
I have a uh4 heatmiser and a vaillant vr71
Currently ls and lr from the heatmiser are wired to s7 on the vr71 as per instruction from vaillant technical and s6 is bridged.
Demand from the ufh system does not cause the boiler to fire.
Neither vaillant nor heatmiser seem able to advise further. Can anyone suggest please?
