Question about SySTOR Systems (400S52) Burner

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Riello forty keeps cutting out when only ignited for a few second

It lights then goes out almost straight away.fuel supply is good no electrial probs

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  • urbane4 Nov 17, 2008

    It seems that the control box (which contains the transformer) reverts to pre-purge mode several times when starting up, as there is no oil spray in the combustion chamber during the seconds the burner has not ignited, yet the flame sensor does not shut down the motor.

    This is most likely to happen after the furnace has been idle for a long time such as when the night time thermostat setback has been reached and the thermostat calls for heat.

    New nozzle, electrodes correctly adjusted, new porcelain electrode holder, new control box (old one had spark erosion damage in area between electrode contact area).

    The burner usually does eventually stay lit after five or six of these brief dead cycles, but the flame sensor occasionally shuts the burner down.

  • Anonymous Dec 21, 2008

    I have the exact same problem and have since the day the burner was installed

  • rosborough17 Feb 11, 2009

    Exactly the same problem.

    I find it is worse on colder evenings.. for whatever reason.
    Especially if the furnace hasn't been running for a few hours and its particularly cold in the basement.


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Too much air. Adjust the air shutter.

Posted on Mar 30, 2010

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I've had this problem twice before. If you don't have a full tank (I get 200 litre deliveries) tilt the end furthest from the line out up on some bricks. Turn the thermostat on and try every 5 mins at the burner. It took for me on the 5th or sixth try. I don't have a clue about these systems or if that was in anyway dangerous but it has worked for me the last two times I've received a delivery of oil after the burner being out of use for prolonged periods

Posted on Nov 14, 2012

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I have had a similar problem , I found a good clean of the nozzle area helps but changing the nozzle /jet and resetting the electrodes should cure it

Posted on Nov 21, 2008

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