Very very Hight Co2 ppm old Myson velarie... Help

[Best]

Ill keep that in mind. Ill take solenoid with me. For better piece of mind.

I also remove the solenoid on boilers that haven’t full isolation switches, just to be safe when I go out to van to get tools or parts.
Don’t want to walk back into a fire. 😱

 

[RayPlumb]

You don’t want the Co2 much more than 11% for that burner.
There was some of them supplied with a slightly different blast tube and you will find it had to burn slightly higher smoke number to achieve reasonable CO2.
I have the actual paperwork for the Velaires, but can’t be bothered looking for it.

Thats good about the smoke number, I ended up with about a 2 smoke , but any less pushed other figures out..

 

[Best]

Thats good about the smoke number, I ended up with about a 2 smoke , but any less pushed other figures out..

Sometimes you just have to be unconcerned with the CO2 being a little low and be happy the boiler is running clean. Over 10% is fine on some old burners I find.
That Electro oil burner was a great burner though. Must be over 30 years old if orange colour

 

[RayPlumb]

Sometimes you just have to be unconcerned with the CO2 being a little low and be happy the boiler is running clean. Over 10% is fine on some old burners I find.
That Electro oil burner was a great burner though. Must be over 30 years old if orange colour

At the figures above should I be worried about sooting up then.
Job all done, dont really want to say to client I have to go back and do more.. But if it will be all sooted up in a few weeks then better sort.

 

[Best]

At the figures above should I be worried about sooting up then.
Job all done, dont really want to say to client I have to go back and do more.. But if it will be all sooted up in a few weeks then better sort.

The figures seem very good.
Much the same as a new type burner would be set at.
Co is a bit high, but not bad

 

[SimonG]

I wouldn't be happy with 70 ppm on the Co.

 

[RayPlumb]

so to bring co2 down to between 10-11% i'd increase excess air. Pushing excess air to about 49% . less soot (good) . But this increases CO (bad) How to get CO down and Co2. down ..Decrease pressure? Pressure set to MI 145psi and Nozzle .5 80 H

 

[SimonG]

I'd derate the nozzle.

 

[RayPlumb]

I'd derate the nozzle.

Smaller ?.. MI set at mid range of burner 60000btu