I have the following problem:
Customer calls me out to say that the above boiler has started smoking heavily the last 2 days getting progressively worse. Has been running OK until then.
Boiler is dated 2004, non-condensing with balanced flue.
Opened up boiler and predictably full of soot. Scraped and brushed out (filled vac bag). Ran without balanced flue hose on and smoke pouring out of flue. Smoke pump reading 8-9
Checked oil pressure and air setting. Makers instructions state 7.5 bar. Was set on 9.5 bar. Air intake was set at 6.
Adjusted pump pressure down to 7.5 bar and wound air intake out to about 8.5 and tested. Eventually stabilised at 11.5% CO2 and 38 CO. with smoke 0-1
Tried to connect balanced flue intake back on and CO2 jumps to 12.5 and CO at 48. Flame keeps going out and trying to relight, which it does for about 10 to 30 seconds before going off again. Winding out the air intake further doesn't seem to make any difference to the CO2. Increasing the pump pressure only makes the flame trip out more often.
My hunch is that there is something up with the air intake duct as when you take it off again everything goes back to 11.5 and 38 respectively. However it's strange that the settings when I arrived were so different to the ones I made, especially if the boiler was working fine at that until recently.
Anyone any ideas what to do? Got me stumped. Could it be the fuel pump?
Customer calls me out to say that the above boiler has started smoking heavily the last 2 days getting progressively worse. Has been running OK until then.
Boiler is dated 2004, non-condensing with balanced flue.
Opened up boiler and predictably full of soot. Scraped and brushed out (filled vac bag). Ran without balanced flue hose on and smoke pouring out of flue. Smoke pump reading 8-9
Checked oil pressure and air setting. Makers instructions state 7.5 bar. Was set on 9.5 bar. Air intake was set at 6.
Adjusted pump pressure down to 7.5 bar and wound air intake out to about 8.5 and tested. Eventually stabilised at 11.5% CO2 and 38 CO. with smoke 0-1
Tried to connect balanced flue intake back on and CO2 jumps to 12.5 and CO at 48. Flame keeps going out and trying to relight, which it does for about 10 to 30 seconds before going off again. Winding out the air intake further doesn't seem to make any difference to the CO2. Increasing the pump pressure only makes the flame trip out more often.
My hunch is that there is something up with the air intake duct as when you take it off again everything goes back to 11.5 and 38 respectively. However it's strange that the settings when I arrived were so different to the ones I made, especially if the boiler was working fine at that until recently.
Anyone any ideas what to do? Got me stumped. Could it be the fuel pump?
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