probly an amateur topic for the experts on here!!
I have;
Main HE24 Boiler (NOT combi but the otha one!)
Room thermostat
4 Radiators upstairs with TRVs
1 Radiator Downstairs with TRVs
Grundfos 15/60 pump
Siemens 3 way valve (newly installed)
Three upstairs rads closest to the pump...
