I was about to run a 7 or 8 conductor wire so I can upgrade to a wifi thermostat (and future proof a bit). but when I look at the current aquastat I have no idea where the extra conductors would go! This is a water boiler (see pic below) and this aquatstat controls the circulator pump. While there are other zones on this boiler I am only trying to control this one. There are currently only 2 wires you can see them coming into the box on the upper left.
Where would I attach a common wire which all wifi thermostat need?
would I be able to (or need to) use any of the other conductors?
Separately-is the wire that is just hanging there a ground? I need a ground for my circulator pump as it is plastic and the BX ground is useless I think.
Thanks for the help. I have a couple other threads showing the little upgrade I have made to this boiler. your help is appreciated.
![]()
this is a pic of the working side of the boiler.
![]()
Where would I attach a common wire which all wifi thermostat need?
would I be able to (or need to) use any of the other conductors?
Separately-is the wire that is just hanging there a ground? I need a ground for my circulator pump as it is plastic and the BX ground is useless I think.
Thanks for the help. I have a couple other threads showing the little upgrade I have made to this boiler. your help is appreciated.

this is a pic of the working side of the boiler.
