bobinyelm wrote:
Chris Bryant wrote:
The igniter will stop sparking itself when the flame lights- it's made to be powered continuously. There should be a manual shutoff at the valve- I shut that off to verify igniter operation.
Since the igniter is now wired to be powered when the gas solenoid is powered, what stops it from sparking when the flame is burning? It's no longer turned off by the thermocouple in the modified wiring circuit.
Just curious
Bob
That's built in to the igniter module-when it senses a flame, it stops sparking. It also pulses a 12 volt signal to the third (unused center) terminal while it is sparking. On old models, the main board used that to let it know it was lit. New models it is unused.
It's just a much faster way to relight the flame if it blows out. Before, the flame would have to be out long enough for the thermocouple to drop to ~15 mv. By this time, the flame had been out for a bit, so it had a fair amount of LP to give a nice whoosh when the igniter fired again.
