Hi All - just quick one.
I'm replacing a mechanical room stat with a digitial one - The mech one is a Potterton PRT 100 - the terminals are marked 1,2,3. 1=red. 2= yellow, 3=blue
The new one (drayton digistat 1) has 1=common, 2= satisfied, 3= demand.
All i need to know is which colour...