Grundfos Selectra 15-50 problem

[twgas]

The other two cylinder stat terminals connect to: (a)Programmer HW ON and (b)valve orange.

(b) will also connect to blr swl and pump (if there is no pump overrun)

 

[D_Hailsham]

The other two cylinder stat terminals connect to: (a)Programmer HW ON and (b)valve orange.

(b) will also connect to blr swl and pump (if there is no pump overrun)

You are right, of course. But as the OP was only concerned about where to connect the grey wire, I was just giving a bit more info to help him identify the wires.

 

[Hursty]

Thanks for all the help on this guys, but though i don't like giving in my town looks better lit up, so i'm getting one of you people up into my loft to sort it out.

 

[twgas]

The other two cylinder stat terminals connect to: (a)Programmer HW ON and (b)valve orange.

(b) will also connect to blr swl and pump (if there is no pump overrun)

You are right, of course. But as the OP was only concerned about where to connect the grey wire, I was just giving a bit more info to help him identify the wires.

understand that, but the OP might think it means there should not be other wires connected to it