Pilot gas valve controller

[melvynpatrick]

I have the above. It is basically a switch that goes to the solenoid near the gas tank and turns it off and on. I also have a pilot mini twin gas alarm with two sensors. I can apparently connect these two devices together so that an alarm turns the gas off. I have the manual and it shows which wires go where. However it isn’t clear how the two devices are powered. Do I have to run 12v to both. Or to one which powers the other. If this is the case. Does power go to the gvc or to the alarm? I hope this makes sense

 

[philwebb]

I think that I would have the devices in parallel. That way either safety device can turn off the gas at the bottle. Each safety device then has its own power supply. Consider each safety device as a switch which puts 12volts on to the cutoff solenoid. The pilot gas alarm will probably need a diode in the 12volt output to prevent voltage from the other device from damaging its output circuit. I’m assuming the pilot gas valve controller is based on a thermocouple and has no associated electronics.

 

[KevinV]

I don't know the specific kit, but I would expect the 12v supply to both valve switch and alarm to be in parallel. I don't see why you would do any different.

I would expect switched power to the solenoid to be in series, so it's AND switched on AND no alarm to open the solenoid - a change in either shutting it off.

It's not entirely impossible that it's different but it would be unnecessarily complex. Easy to check by measuring whether the switched feed from the alarm is on or off when no alarm is triggered (I'd expect on)

 

[melvynpatrick]

I see what you’re saying. Looks like that’s the way. I emailed the company but got no response.