"technics100" wrote in message
...

Hi

I have a trianco eurotrader boiler, in a external boiler house. I had
the oil pump, motor and photocell replaced approx one month ago after
the boiler wouldn't work. Since then the boiler has continued to trip
every once and a while. Now it it tripping after a couple of minutes.
I have had a look at the forum and have taken the plug out of the water
pump to see if it is turning - it is turning but I can't see if it is
pumping alot of water. Should alot of water come out of this hole when
the pump is running and the plug is out? If I press the button on the
trip the boiler fires up and works for a short period then trip again.
Any help is appreciated as I have already spent £190 on the above items
and am weary of the person who fixed the boiler. I don't know whether
to believe him or not.


Is the oil supply restricted by a blocked oil filter or a mostly closed
valve?
Is the fuel contaminated with water?
If its tripping the lockout on the burner it will not be the heated water
system which is causing it.
Which make of burner is fitted to the boiler since Trianco use several types
such as Riello, Inter-oil, RDB, Monoflame etc etc. Certainly if you have
already had a new motor, oil pump, and photocell there is a limited number
of possible other alternatives provided the parts fitted were new.
Can you describe exactly what happens step by step from starting to lockout
along with the timing.
As a guide the burner motor should start to rotate, run for a few seconds
driving the fan to purge the combustion chamber clear with fresh air, The
ignition spark will commence and then the oil solenoid valve will open
usually with an audible click. At this point you should hear the flame
ignite. The light of the flame will illuminate the photocell which informs
the sequence control box it is healthy. The ignition spark stops and the
burner continues to run until the thermostat is satisfied or the power is
removed. If no flame light is seen within about 10 seconds the burner stops
and the sequence control goes to lockout. This varies but it will not reset
straight away on most sequence controllers, requiring a few minutes to allow
an internal timer to reset