Co/co2 ratio

[julesverne]

Air gas ratio valve is tb 126

 

[c.gas]

Not sure then mate but if you look at the title when you click on Tb 143 it says when commissioning condensing boiler with air gas ratio valve. Can't find tb146 so will have a look tomorrow

 

[REDSAW]

I disagree post up the page.
The action level is 0.004 (means it needs a service or otherwise)regardless of make or age unless MI's state otherwise.
Im happy to be proved wrong unless you can prove otherwise with an upto date book.

Hence i would be looking at dancins book

for a open flue boiler its 0.004,
for a combi its 0.008.
unless otherwise by m.i.

thats from the latest niceic book!

 

[hammers4spanner]

I do love how gas safe move the ratios around not that long ago they were saying that 300 ppms now its 350.

No wonder we have confusion

 

[julesverne]

Im just gonna take my guidance from tb 143 tb 126 and kane guide which also states 0.004

 

[wattsie1987]

MI's is what we all should be working too and engineers judgement I wouldn't be walking away from something with over 200ppm

 

[Leo21]

MI's is what we all should be working too and engineers judgement I wouldn't be walking away from something with over 200ppm

I wouldn't either, but why? It's room sealed.

 

[wattsie1987]

I wouldn't either, but why? It's room sealed.

The chance of products entering the property through the boiler are next to none. But there's a reason the Co is high and that's something isn't right so I'll make it right because that's what I'm paid to do. (And because I like falling straight to sleep at night) 🙂

 

[GrahamM]

I find it hard to believe some people are not using an FGA to confirm safe combustion levels on a non-condensing appliance!
Why have we got published action levels of 0.008 for non-condensing appliances if not required?
Why have Vokera compacts, Linea's, Worc 28i Junior, Baxi combi 80's etc been fitted with flue gas sampling points?
How many linea's etc are you overlooking as safe when combustion levels are through the roof?

Don't get it!

 

[Leo21]

Because there's no requirement, and no reason. Flame picture, burner pressure, gas rating. It's been ok for over twenty years! And it hasn't stopped being ok.

 

[mfgs]

There is no requirement, but I have an analyser so I use it. It personally makes me feel a lot happier when I know how the appliance is burning. I cant see a reason why you wouldn't check seeing as you have the equipment to do so, it could pick up a problem not immediately obvious to the eye.

 

[jaydebruyne]

There is no requirement, but I have an analyser so I use it. It personally makes me feel a lot happier when I know how the appliance is burning. I cant see a reason why you wouldn't check seeing as you have the equipment to do so, it could pick up a problem not immediately obvious to the eye.

I don't like lying awake at night so I check every boiler I can..

 

[ShaunCorbs]

if theres a port use an fga if no port do it old school

 

[jaydebruyne]

if theres a port use an fga if no port do it old school

At the terminal?

 

[REDSAW]

There is no requirement, but I have an analyser so I use it. It personally makes me feel a lot happier when I know how the appliance is burning. I cant see a reason why you wouldn't check seeing as you have the equipment to do so, it could pick up a problem not immediately obvious to the eye.

i would like to see you hanging out a third floor flat window with your analyser hanging on to a gw ultimate flue!
one and all or not at all? its no good re writing the rules for a 25 year old boiler when computers wasnt even heard of let alone analysers!

sorry luv you need new boiler, its above 350ppm..

[video=youtube_share;AJQ3TM-p2QI]https://youtu.be/AJQ3TM-p2QI?t=16[/video]

 

[wattsie1987]

Because there's no requirement, and no reason. Flame picture, burner pressure, gas rating. It's been ok for over twenty years! And it hasn't stopped being ok.

Why would you not test the flue integrity and the fan is spinning well enough if you can and it takes 2 mins longer? I guess it all comes down to the era in the gas industry you came through. If I can I will fga a boiler I will there is even options to fga bbu's and cookers so why not if it ensures end users safety and covers your backside?

 

[mfgs]

i would like to see you hanging out a third floor flat with your analyser hanging on to a gw ultimate flue!
one and all or not at all?

[video=youtube_share;AJQ3TM

Well obviously I wouldn't hang out of a window, I would get a scaffold and include it in the price.......
If I can analyse a boiler, then I will. I honestly don't know why you wouldn't. It may not be a requirement and the technology may not have been around when the boiler was made, but it is now so why not utilise this great new tool that has been invented and do a couple of further checks on a boiler service? 20 years ago you would have had to chat to other plumbers down the merchants, now computers are around and you are doing it on a Sunday evening while you are probably sat on your sofa. Its all about embracing new technology.

 

[Leo21]

Roll on retirement, the worlds gone mad.
I'm going to buy a Hyundai, and take a drive around at 15 mph. From 7am until 9am.

 

[REDSAW]

whats the allowable ppm on a ballanced flue, say an ultimate with intact flue, good flame pic and correct gas rate?

 

[mfgs]

whats the allowable ppm on a ballanced flue, say an ultimate with intact flue, good flame pic and correct gas rate?

I would work of 0.0040 ratio and 0.0080 after a full strip and clean. If its good enough for British Gas, then that works for me.

 

[Leo21]

I would work of 0.0040 ratio and 0.0080 after a full strip and clean. If its good enough for British Gas, then that works for me.

You'd better power flush it while your there then.

 

[clarky101]

i would like to see you hanging out a third floor flat with your analyser hanging on to a gw ultimate flue!
one and all or not at all?

[video=youtube_share;AJQ3TM

Well obviously I wouldn't hang out of a window, I would get a scaffold and include it in the price.......
If I can analyse a boiler, then I will. I honestly don't know why you wouldn't. It may not be a requirement and the technology may not have been around when the boiler was made, but it is now so why not utilise this great new tool that has been invented and do a couple of further checks on a boiler service? 20 years ago you would have had to chat to other plumbers down the merchants, now computers are around and you are doing it on a Sunday evening while you are probably sat on your sofa. Its all about embracing new technology.[/QUOTE]

Blimey, a £300 plus service....bet the customer would go with someone cheaper....

 

[mfgs]

I charge £350 for a standard service, no way am I giving a discount when also providing scaffolding.....

 

[mfgs]

You'd better power flush it while your there then.

I was thinking more magnaclean and co detector on this one, gets boring always selling power flushes. May also try and get them to switch the electricity supplier to BG though, even more commission then.

 

[clarky101]

Again blimey, So a service from you can cost past 700 plus with a scaffold...in a domestic dwelling....