boiler with intermittent pilot?

29 Oct 2008
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United Kingdom
A boiler that uses mains spark (electric) ignition, allows gas to the burner where it is ignited, after the fan/aps, etc has proved OK, etc, and when the flame has been detected by the detection electrode, igniton sparking stops. there can also be 2 stages where a small amount of gas is let through, and when ignited and proved OK a full rate is allowed to the main burner.

But how does a boiler with an intermittent pilot work? is it the same principle? just with 2 stages? am curious.....
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ok thanks.....

basically a non-permanent pilot and a boiler with no pilot at all (mains spark straight to the burner, in 2 stages sometimes too) - have the same/v. similar ignition/fail safe device procedures/features?
A non permanent pilot boiler usually uses the pilot as the reference for the flame failure device.

An electronic spark generator boiler will use a detection device in the main burner flame.

Basically both doing the same job but from different angles ;)
Thanks for the above posts all.

Sometimes you see a combined spark / rect. electrode with 2 or 3 tips, i guess 1 (or 2) of the tips are for ignition and the other tip for rectification, to tell the PCB that a flame has been detected.

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