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Hi,
I'm fixing a Riello 40 burner with two-pipe fuel supply (in a Camray Compact boiler); hit a wall at the moment, any tips welcome, thanks.
SYMPTOMS: switch on from cold and the motors runs forever with no sound of the ignitor arcing, until after around 2 mins, then it ignites crisply immediately on hearing the igniter relay; it then burns, sounding normal, for a few seconds and then locks out. This happens every time, very repeatable.
Just today though, it now makes no attempt to ignite; motor just runs for ever, no ignition, no sounds of an arc. (Does it have some kind of fuel detection prior to turning on the ignitor? After the work below, I'm beginning to suspect the pump.)
WORK SO FAR:
1) I've run it with the two fuel hoses submerged in a tub of oil right next to the boiler; no change, same symptoms.
2) The light sensor is completely clean.
3) The combustion chamber is clean; mixture appears good ... was professionally adjusted not long ago.
4) Run it with the control box lid off. After ignition the bimetallic strip heater, in the lock-out mechanism, appears to stay on because the strip starts to bend seconds after ignition and then triggers lock-out.
That's as far as I've got. Tips much appreciated.
Thanks, Dave.
I'm fixing a Riello 40 burner with two-pipe fuel supply (in a Camray Compact boiler); hit a wall at the moment, any tips welcome, thanks.
SYMPTOMS: switch on from cold and the motors runs forever with no sound of the ignitor arcing, until after around 2 mins, then it ignites crisply immediately on hearing the igniter relay; it then burns, sounding normal, for a few seconds and then locks out. This happens every time, very repeatable.
Just today though, it now makes no attempt to ignite; motor just runs for ever, no ignition, no sounds of an arc. (Does it have some kind of fuel detection prior to turning on the ignitor? After the work below, I'm beginning to suspect the pump.)
WORK SO FAR:
1) I've run it with the two fuel hoses submerged in a tub of oil right next to the boiler; no change, same symptoms.
2) The light sensor is completely clean.
3) The combustion chamber is clean; mixture appears good ... was professionally adjusted not long ago.
4) Run it with the control box lid off. After ignition the bimetallic strip heater, in the lock-out mechanism, appears to stay on because the strip starts to bend seconds after ignition and then triggers lock-out.
That's as far as I've got. Tips much appreciated.
Thanks, Dave.
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