I add information:
I found this end of the loose connector (photo), it comes from one of the sensors (photo) and I can't find where it is connected, The other cable that comes out of the sensor goes behind the gas valve, but I don't see a second connector to put this file
I took out the magnetic unit and this is what it looks like:
SOLUTION : the card must go to the same gas valve, in the part where the thermocouple enters:
Ready!! It was solved, thanks to the help of "MDQ Heating" that TIPS was throwing at me.
Step to detail: indeed, that loose card had a place to be located, and it is in the same gas valve (NOVA 820). The thermocouple must make contact with that card, the cable of this card makes its route and ends at the back of the same gas valve closing the circuit and transmitting the heat generated voltage, keeping the solenoid valve stuck while the pilot is on . (I put another picture with the detail of the place of the card and its front and rear connection)
Hi
that gas valve has a magnetic unit, take it out and test it with a battery if it retains it when giving it power; If it does not retain, it means that it is failing and must be changed.
EDITION: I had to edit the answer to upload a copy of the electrical circuit, I followed the cable to see where it is connected, as you can see the terminal block has numbering and it is very easy to follow it to see where it is connected
Regards !
regards !
I try to follow your instructions (I uploaded another photo where I took the magnetic unit), but I can't find where to test with the battery (it seems to be a closed unit)
On the other hand, thanks for the electrical scheme but I do not get to understand what that loose sheet is like to know where it should go. (thanks for the patience)
that loose wire can be the one that goes to the flue gas thermostat, located at the flue outlet of the boiler (it's like a button with two terminals) one terminal goes to ground and the other to the gas valve, is the protection Monoxide control if there is a problem in the run, in that valve the magnetic unit is inside and it must be confirmed to access, but it seems to me that the problem comes from that loose cable, do a test: put it to ground (touch the sheet of the boiler) and try to turn it on to see what happens, if it turns on it is the cable that I tell you, but do not stop normalizing it!
