Riello burner, lock out every week or two.

[dalaruan]

I have had this problem for a year. Every week or two the Riello RDB2 burner in my Grant Oil-fired central heating system will lock out.

I have cleaned it all out, adjusted the electrode gap, replaced the photocell, replaced the nozzle and replaced the capacitor. All parts were genuine with the correct Riello part number. Also replaced the tank filter and pump filter and sealing ring to ensure that enough oil was getting through.

Still got lock outs. The boiler is only about 4 years old, so I don't expect any expensive parts to have failed yet.

Interestingly the boiler has been operating without lock out all summer, heating the water. As soon as I turned on the central heating last month, the weekly lockouts recurred.

Any suggestions? The only other (cheap/easy) part left to change appears to be the solenoid, after that I am into the realms of serious expense (control unit or pump?). Is it worth replacing the solenoid?

I can't help thinking that if the burner worked all summer without locking out, that this is significant, but can't work out what it means. Is there anything that would cause it to lock out if something gets too hot?

I welcome any ideas, suggestions etc.

Thanks.

 

[SimonG]

What's the pump pressure and co2 like?

 

[kimbo]

I think your answer lies in your question

 

[Chalked]

What's the pump pressure and co2 like?

Again as above. Replace all you like but if you haven't checked co2 and pump pressure first, your guessing .

sh..... It's prob the pump. Keep it to yourself tho.

 

[SimonG]

I have had this problem for a year. Every week or two the Riello RDB2 burner in my Grant Oil-fired central heating system will lock out.

I have cleaned it all out, adjusted the electrode gap, replaced the photocell, replaced the nozzle and replaced the capacitor. All parts were genuine with the correct Riello part number. Also replaced the tank filter and pump filter and sealing ring to ensure that enough oil was getting through.

Still got lock outs. The boiler is only about 4 years old, so I don't expect any expensive parts to have failed yet.

Interestingly the boiler has been operating without lock out all summer, heating the water. As soon as I turned on the central heating last month, the weekly lockouts recurred.

Any suggestions? The only other (cheap/easy) part left to change appears to be the solenoid, after that I am into the realms of serious expense (control unit or pump?). Is it worth replacing the solenoid?

I can't help thinking that if the burner worked all summer without locking out, that this is significant, but can't work out what it means. Is there anything that would cause it to lock out if something gets too hot?

I welcome any ideas, suggestions etc.

Thanks.

How about this as an off the wall suggestion!

Rather than you tinkering (that's me being polite) and risking your own and families well being. Get somebody in who actually has an idea of how oil boilers work.

I know, I know, I'll get my reward in heaven.

 

[lame plumber]

would be cheaper to get it serviced by someone in the know each year!

 

[Bunker]

As above, you obviously have an idea about engineering but thats not the same as knowing about boilers/ burners. You would have probably saved an awful lot of money getting the right person in at the right time. There are a number of other easy things to check but Im afraid you wont find that sort of advice here as we will not encourage someone without the right test kit to fettle on something that could kill you.
I attend alot of dangerous boilers that have been fettled by the home owner, some of who are super engineers:
Last week I went to a leaking pump/ smelly boiler - the pressure was at 300psi - home owner had turned the adjuster 360 degrees to try to get more heat output - boiler was filled with soot, the flue gasses would have been lethal.
Yesterday I replaced a pump where he uses his own kerosene mixes from his work at a chemical reclaimant plant! I wouldnt even put my analyser on that, smelt like carb cleaner.

Anyways, our advice will always be the same: GET SOMEONE IN.