Riello RDB burner issue

coxy123

I'm having an issue with external boiler - it appears that the pump is faulty on burner - oil pressure gauge only getting to approx. 5 bars of pressure after testing. AFAIK, for kerosene this should normally be above 7 bars for it to be capable of firing. I believe the burner is a Riello 3.2(I'll need to re-check to make sure).

I'm looking for suggestions as to whether we should be looking at a new burner replacement altogether or just the pump, and is their much work to re-fitting a new pump to existing burner. A plumber friend of mine had already looked at the unit and believed issue was with the pump.

Tks.

Billy Bunting

Have you attempted to increase the pump pressure ?? The RDB 3.2 wouldn't be an old burner.

coxy123

Hi Billy,

I'll post back the exact model of burner this evening just in case but we tried numerous times to increase pump pressure - stayed up for the evening - next day it went back down again - tried re-setting again but to no avail.

coxy123

It's actually a rdb 2.1 model.

MiniGolf

Had the exact fault on a customers RDB last week. Replaced the pump and all sorted. I havn't had time to dismantle the pump to examine it to see what the problem is/was but when I do I'll post here!

Billy Bunting

coxy123 wrote: »

I'm looking for suggestions as to whether we should be looking at a new burner replacement altogether or just the pump, and is their much work to re-fitting a new pump to existing burner. A plumber friend of mine had already looked at the unit and believed issue was with the pump.

Tks.

Presuming the general condition of the burner is good and it has been regually serviced i would go for the pump change, retail price...... http://www.heat-tech.ie/fuel-pumps/44-riello-rdb-pump.html
and simple enough to exchange, you will need a oil pressure gauge to reset pressure, ideally flue gases checked.

coxy123

Tks for assistance so far.will let you know of progress.

DGOBS

My rule of thumb is, if the burner is in excess of 10 years old, I would usually give the customer prices and options for burner and pump replacement
(I kinda think would you put a new engine in a 10 year old car!)

When replacing pumps, I would always check filters for debris, including the old pump filter, if excessive debris is found or water contamination (brown scum and/or rust) address the fuel storage, oil lines and renew filters before a new pump is fitted.

Yes kero should be 7-10 bar as a general rule, but d check manufacturers instructions for correct nozzle and pump pressure settings, condensers tend to use the higher end of the scale, standard eff. usually 7-8 bar.

Once set dont forget to smoke test and analyse

coxy123

Billy Bunting wrote: »

Presuming the general condition of the burner is good and it has been regually serviced i would go for the pump change, retail price...... http://www.heat-tech.ie/fuel-pumps/44-riello-rdb-pump.html
and simple enough to exchange, you will need a oil pressure gauge to reset pressure, ideally flue gases checked.

Are there any guides available re: pump changing Billy or is it just a matter of detaching current one and replacing with new one(I've been waiting on a plumber to do this for me:() - I would prefer not to mess anything up! I've taken note of the oil pressure gauge check. Tks.

Billy Bunting

I’m sure the WWW would have the answer to your question somewhere, i think it wise to state that while working on your oil burner is not illegal a need for competence is required, if you leave a leak on your oil pump you could have that leak at pump pressure and quickly empty a tank, the clean up cost involved in that would be with you forever, do yourself a favour and get a competent person, ideally an Oftec registered engineer.

coxy123

Advice noted...thanks Billy B.