Having the new boiler fitted on Sunday.
The existing system has a FCU adjacent to the programmer unit and that feeds on to the boiler down stairs.
So the plumber has asked for a FCU at the boiler location and intends to use the existing 3 core + earth between the boiler and y plan box.
So looking at the diagram
and then considering the Vailant eco tec wiring block
What goes where ?
The existing system has a FCU adjacent to the programmer unit and that feeds on to the boiler down stairs.
So the plumber has asked for a FCU at the boiler location and intends to use the existing 3 core + earth between the boiler and y plan box.
So looking at the diagram
and then considering the Vailant eco tec wiring block
What goes where ?