How does the boiler gas valve work ?

[JM2]

Theoretically speaking.

i.e. A Netaheat domestic boiler or those of similar type (2-coiled gas solenoids, automatic electric ignition).

I can see the normal sequence of; demand, gas pilot, ignition, gas main etc.

But how does the boiler controller/gas valve know that the pilot has sucessfully lit and so doesn't need lighting again and all is well to switch the full gas on for the burner ?

 

[slapper]

Its all to do with centrifugal retraction based on the ions thru the process of rectumfication. hope that helps your understanding a bit better.