Just bought a new digital programmer to replace old mechanical one. New one (Drayton LP241) fitted onto old back (Landis & Gyr). All works fine, but the instructions state that I should be able to get the CH to operate independently from the HW. I can only get the CH to work when the HW is on. Looking at the wiring, only pin 3 and 4 are used. Pin 1 has a linked live from the L terminal.
Any ideas on how I can wire this up for separate CH & HW?
Thanks Guys.
Any ideas on how I can wire this up for separate CH & HW?
Thanks Guys.