black smoke boiler problem

[oilman]

That looks more like one set of readings from a Kane 400.

(and is quite normal BTW).

 

[WDIK]

That looks more like one set of readings from a Kane 400.

why the differing O2?

6.9% 3%

 

[oilman]

That 3% is a reference level, and it is printed on every results slip from a Kane.

 

[WDIK]

That 3% is a reference level, and it is printed on every results slip from a Kane.

even by the first reading then fgt is too low and the O2 too high
id be ashamed of a reading like that.

the 49% excess air is that a reference too

 

[oilman]

The 49% is calculated, and the FGT is probably because he didnt wait for the system to warm up. The CO2 will rise as it gets hotter, and the CO will fall.

 

[WDIK]

either way im sure those figures will improve with a new filter

 

[oilman]

I doubt the filter has much to do with it.

we have checked filter at tank and is ok

 

[Terrywookfit]

It is quite normal to get net fgt in the 150-160 range on the Camrays!!

It was sometimes necessary to remove a baffle if condense was causing problems due to exposed / poorly insulated chimneys. (No one had thought about Part "L")

 

[WDIK]

I doubt the filter has much to do with it.

yes forgot about the aga

 

[oilman]

(No one had thought about Part "L")

Part L?? what's part L???

 

[Softus]

Does the fan motor have a capacitor?

If so, it could be intermittently breaking down and dragging down the speed.

Have you measured it when you're getting the black smoke?

 

[WDIK]

that would decrease the fan speed, if anything this is under fueled not under aired.
oilman has put his finger on it,
sucking air from the aga
or and a blocked filter
god i hate domestic installs

 

[Softus]

that would decrease the fan speed

That's what I said.

if anything this is under fueled not under aired.

I don't follow your reasoning.

oilman has put his finger on it

oilman certainly knows what he's doing.

 

[WDIK]

putting it simpley
oilman suspects that air may being drawn via the aga oil suppy.
this will restrict the oil to the burner causing the pump to partialy cavitate
result under fueling
over aired
flame cooling
flame impingement
which is why im im not happy with the combustion figures
cause filter or draging air from the aga
now fetch an egg and show me how to suck it
ive been commisioning burner since 1983 on oil gas and bio gas
and not on toy burners
generally up to 1.8mw
dont play with me
this burner should read 4% O2 24% excess air 0 PPM CO AND 11% co2

dont fool with me i do it for a living

 

[Softus]

putting it simpley
oilman suspects that air may being drawn via the aga oil suppy.
this will restrict the oil to the burner causing the pump to partialy cavitate
result under fueling

Well, that's possible.

over aired

Does under-fuelled automatically mean that it's over-aired?
Or is there another reason to suspect it's over-aired?

flame cooling
flame impingement
which is why im im not happy with the combustion figures
cause filter or draging air from the aga

OK.

now fetch an egg and show me how to suck it
ive been commisioning burner since 1983 on oil gas and bio gas
and not on toy burners
generally up to 1.8mw
dont play with me

I don't know you why you've decided that I want you to suck an egg, or that I want to play with you.

this burner should read 4% O2 24% excess air 0 PPM CO AND 11% co2

dont fool with me i do it for a living

I don't find your teeth-baring exercise to be very impressive. If you're right then you're right, but you seem very defensive.