Flue gas analysis to high

[arran197]

If after s strip down it is 0.007 then yes, that is acceptable in the regs. I don't think this would indicate that the boiler was perfect though. Anything below 0.004 is acceptable to leave. As long as the rest is ok.

Not sure what perfect combustion show tbh, but the chnaced of getting it are slim!

 

[Leadbetter]

What do you do if u came across this situation on a landlords gas saftey inspection and refused to have it serviced

 

[mfgs]

Then you have to AR it as far as I'm concerned

 

[billybob150811]

Phew stwalsh i,m much more proud than you and they,ve duffed me up --get over it just to throw some petrol on this one how many people know the first thing about fga,s If you go to court can you defend yourself and your readings the first thing i do is purge out in the fresh air and get a time and date stamp and the ambiant temp then go inside and do your readings with a cleaned fga if i knew it all you,d be the first to know but as it is if youve got any tips on fga,s i,m all ears

 

[GrahamM]

Just to clarify this as per my knowledge.
Unless the MI's state otherwise anything upto 0.004 is a pass.
Any reading over this then the appliance must be strip cleaned otherwise it is 'AR'. To allow for settling of the burner/heat exchanger you are permitted a higher tolerance of 0.008 immediately after cleaning.


Was there not something mentioned here somewhere about a zero governed boiler being classed as 'ID' if it over the 0.008?

 

[CMairiD]

Yeah, TB 126 recommends ID on condensers with air/gas ratio valves that exceed 0.008.

You're dead right with MIs, as many of Greenstars are looking for 0.002 max.

 

[metaldust9]

any boiler up to 0.004 is ok unless mi,s stat otherwise 0.004 to 0.008 needs service, for a while the co,s will rise then settle anythink over 0.008 id switch off and label thats what i done on cpa1

 

[gasmarc]

when i did my CPA1 all the instructor said was the ratio and nothing else mattered . I have since done it elsewhere and learned much more, some thing that is handy is testing the air inlet on the flue which should be 20.9 ,

 

[kirkgas]

There is training out there but this goes back to experience. If the OP had passed his assessment which to be honest a days training and an exam any one with a bit of common could do, but if he then had to go back to his mentor/tradesman or whatever he could have points like this clarified without our ridicule and scorn . It is the system that is at fault.
You can pass CPA1 and not even own a FGA , where is the sense in that !
Wonder how long he spent trying to clean it ( no offence intended just a laugh)


I would agree with your final point with one change

They should not be working out there UNSUPERVISED

i learned to drive and didnt have a car, and when i passed my test i was given a bedford CF van (like a transit) that didnt have back windows or a near side mirror, where is the sense in that but we all done it

 

[kirkgas]

when i did my CPA1 all the instructor said was the ratio and nothing else mattered . I have since done it elsewhere and learned much more, some thing that is handy is testing the air inlet on the flue which should be 20.9 ,

testing air inlet is a good check as it confirms (at that moment at least the air intake and flue are seperate, read TB008 ed 2) it also gives an indication that you o2 sensor is working/ok, had a guy saying he took a reading at work and the 02 reading was 5%, couldnt get him to understand that if the 02 was that low i didnt think he could breath properly for long, but then again perhaps he was starved of 02 at some point, it would explain a few things about him