RDB2 Burner stopping starting in a cycle

Andy From Sligo · 12-10-2024 12:50pm #1

hi all. Our Grant condenser boiler with a RDB2.2 Burner is not firing up properly. its stopping and starting in a loop, terrible smell of unburnt kerosene in the air.

Things I have tried today so far.
Cleaned Photocell with cotton bud - Photocell and black rubber shaft has load of black soot on it.
Unscrewed Filter at bottom of Kerosene tank and a cleaned fair bit of crap off the filter and cleaned the bowl - put back , still doing same not firing up (well goes to light but then cuts out, goes to light again in a loop) - Radiators in the house are all getting hot still …

Tigerloop glass bowl is all full of kerosene - tank has plenty of kerosene in it so not sludge at bottom of tank issue.

Next I was going to try look for filter in the oil pump and give it clean if needed - then after that clean main burner jet filter just in case thats blocked or even replace main jet if needed.

Am I going in right direction, anything else I should check or any other filters I have not mentioned?

thanks,
Andy.

Wearb · 12-10-2024 1:06pm

Sounds like is totally out of tune. Needs a cleaning, and pressure and air adjustment.

Any smoke/blackness at the flue terminal?

Andy From Sligo · 12-10-2024 1:21pm

https://www.boards.ie/discussion/comment/122711682#Comment_122711682

Thanks.

no smoke / just condensation plume when its cold outside temperature, inside of flue is black yes. when it was starting up no fume smell in the air , just only smell there now its not firing fully at the moment

Lenar3556 · 12-10-2024 1:44pm

Could be a lot of things. Dirty filter on the oil line could suggest a build up of water at the bottom of the tank which promotes formation of sludge. This can also give rise to a partial blockage in the oil line.

A faulty photocell can also do what you are describing.

Wearb · 12-10-2024 2:12pm

inside of flue is black yes.

Get it adjusted before you have a right sooty mess. That sort of thing can snowball quickly.

Andy From Sligo · 12-10-2024 2:36pm

Thanks all, I think its sorted now - I went out, took off blast tube and cleaned electrodes and jet and its firing up now and staying fired up - hopefully fingers crossed that is all it was , I am just keeping an eye on it. - the electrodes where all carboned up and had what looked like a bit of cobweb or dirt or something between the gap in between them .
only cleaned them up with contact cleaner and a toothbrush, I thought a wire brush would be too severe , I cleaned the blast tube thoroughly with a wire brush attachment on a cordless drill.

Wearb · 12-10-2024 4:16pm

That hasn't fixed your problem. What you described above would do nothing to fix the original problem.

Anyway you have it going for now, so arrange a service as soon as possible or you'll be right back where you started and end up looking for someone to call at short notice.

jimf · 13-10-2024 8:17am

if this is an indoor boiler id leave it off until its checked over properly

you could be producing dangerous levels of co

John.G · 13-10-2024 12:28pm

Irrespective of the above, its a good practice to run any boiler for 5 minutes or so evey 10 days or so if not using it during the summer months, I regularly have to just remove the blast tube from my neighbours and give the electrodes a rub of a rag around this time every year since he's just too lazy to do the above.

Andy From Sligo · 13-10-2024 12:31pm

https://www.boards.ie/discussion/comment/122713822#Comment_122713822

Outdoor boiler

Andy From Sligo · 13-10-2024 12:36pm

https://www.boards.ie/discussion/comment/122714505#Comment_122714505

ya had it running all throughout summer (if you can call it that this year) - just heating up water in immersion tank, not radiators

John.G · 13-10-2024 12:50pm

Definitely requires expert attention then.

Andy From Sligo · 13-10-2024 1:06pm

https://www.boards.ie/discussion/comment/122714568#Comment_122714568

thats the plan soon - get it all tuned up . just waiting for finances to build up

RDB2 Burner stopping starting in a cycle

Comments