FGA Result need altered?

[JTplumbingservices]

I had to move an existing Vokera unica 32i today for a kitchen upgrade so I stuck my analyser in afterwards, my ratio is fine and reading 0.0011 but the C02 is 9.7 and 213ppm which is high according to the MI.
I’ll be back on the job tomorrow, it’s an empty house and the boiler has been left isolated but should I be adjusting this to get the numbers down?
Cheers in advance.

 

[Scott_D]

Can you download the MIs

 

[JTplumbingservices]

Can you download the MIs

Not sure how to do that but they are online and on gas app

 

[JTplumbingservices]

Can you download the MIs

https://www.vokera.co.uk/wp-content/uploads/2014/02/Unica-i28-i32-i36-installation-manual.pdf

 

[ShaunCorbs]

Let it run for an hour on heating then re check

 

[JTplumbingservices]

Let it run for an hour on heating then re check

I had it on hot water for about 30 mins but will try as you suggest tomorrow.
If the results are the same ?

 

[ShaunCorbs]

New flue or re use ?

 

[JTplumbingservices]

New flue or re use ?

Used a new one

 

[AMGasServices]

I had to move an existing Vokera unica 32i today for a kitchen upgrade so I stuck my analyser in afterwards, my ratio is fine and reading 0.0011 but the C02 is 9.7 and 213ppm which is high according to the MI.
I’ll be back on the job tomorrow, it’s an empty house and the boiler has been left isolated but should I be adjusting this to get the numbers down?
Cheers in advance.

The gas valve will probably need setting up. You’ll need a 2/2.5mm and 4mm Alankey.

1. Turn the selector control knob to the off position.
2. Drop the PCB down at the back there are 2 screw to undo a flap.
3. Using a pen locate the red button under the flap.
4. Press once for ch max (usually run the hot tap too) press twice for dhw max and press third time for min.
5. Max co should be 9.0 min should be 9.5. (Double check with mis)
6. Once complete turn the boiler on from the selector control knob it’s out of service mode.

Hope that helps.

 

[JTplumbingservices]

The gas valve will probably need setting up. You’ll need a 2/2.5mm and 4mm Alankey.

1. Turn the selector control knob to the off position.
2. Drop the PCB down at the back there are 2 screw to undo a flap.
3. Using a pen locate the red button under the flap.
4. Press once for ch max (usually run the hot tap too) press twice for dhw max and press third time for min.
5. Max co should be 9.0 min should be 9.5. (Double check with mis)
6. Once complete turn the boiler on from the selector control knob it’s out of service mode.

Hope that helps.

Cheers for that, I get how to alter it. I just wasn’t sure with the ratio being ok and the CO and PPM not ok what the correct course of action was as I’ve never came across it before.

 

[ShaunCorbs]

defo adjust then wouldnt be surprised if you cant get it down past 140 ppm

 

[JTplumbingservices]

defo adjust then wouldnt be surprised if you cant get it down past 140 ppm

Ok mate cheers, I’ve never had to do this before . Is it just a case of adjusting it while it’s running with the analyser in and watch the reading drop as I go ?

 

[ShaunCorbs]

correct while on max rate then do min if you can adj it (instructions will tell you) then check max again and then finally check with cover on

 

[JTplumbingservices]

correct while on max rate then do min if you can adj it (instructions will tell you) then check max again and then finally check with cover on

Thanks for your help mate.

 

[EvilDrPorkChop]

I wouldn't start altering it until you've checked the burner seals etc. Could be something simple like that. Have you checked your 02 readings on air intake too?

 

[firemant]

Ok mate cheers, I’ve never had to do this before . Is it just a case of adjusting it while it’s running with the analyser in and watch the reading drop as I go ?

I wouldn't start altering it until you've checked the burner seals etc. Could be something simple like that. Have you checked your 02 readings on air intake too?

Wow! JT, I asssume that you are registered? How can you nit have adjusted a gas valve before now, is it not part of training these days. Not trying to be a Smart A, I am genuinely confused - it is a basic function.
Choppers: Before you start worrying about seals, it is normal to reset the gas valve, as they drift. I had to adjust a Worcester yeterday. The CO2 was 9.1% on high. I adjusted but Overstepped, and the CO shot through the roof!. Slight readjust and bang on 9.8, and CO, IIRC, about 95.

If you cannot adjust to correct parameters, then start looking at other stuff.

Or am I missing something?

 

[JTplumbingservices]

Wow! JT, I asssume that you are registered? How can you nit have adjusted a gas valve before now, is it not part of training these days. Not trying to be a Smart A, I am genuinely confused - it is a basic function.
Choppers: Before you start worrying about seals, it is normal to reset the gas valve, as they drift. I had to adjust a Worcester yeterday. The CO2 was 9.1% on high. I adjusted but Overstepped, and the CO shot through the roof!. Slight readjust and bang on 9.8, and CO, IIRC, about 95.

If you cannot adjust to correct parameters, then start looking at other stuff.

Or am I missing something?

I don’t see why you’re so confused.
No you don’t have to do it as part of training and I haven’t done it yet because I haven’t been installing or moving boilers since I became registered.
Hope this clears things up for you.

 

[firemant]

I don’t see why you’re so confused.
No you don’t have to do it as part of training and I haven’t done it yet because I haven’t been installing or moving boilers since I became registered.
Hope this clears things up for you.

Your tone suggests that you have taken offence!
I can’t actually recall what is in the ACS to get a boiler ticket, but I do know that you use to have to do a FGA course, but is now part of the Boiler module. I still do not understand how you can be registered for boilers, especially as a new guy, without having learnt about FGA’ing - holding the ticket says you are competent.

Has the industry gone mad?

 

[JTplumbingservices]

Your tone suggests that you have taken offence!
I can’t actually recall what is in the ACS to get a boiler ticket, but I do know that you use to have to do a FGA course, but is now part of the Boiler module. I still do not understand how you can be registered for boilers, especially as a new guy, without having learnt about FGA’ing - holding the ticket says you are competent.

Has the industry gone mad?

Your tone suggested you were actually trying to be a ‘ smart A ‘
We did learn about it and I passed my combustion analysis which I have on my card.
During assessments and training we had to practically carry out FGA tests and record results but never had to physically alter a valve, we learned a lot about ratios and action levels etc but never if a ratio is fine and other readings are not and this is the first time I’ve experienced it.
I thought this site was about helping and advising others ?
To be fair it is 99% of the time.

 

[ShaunCorbs]

Your tone suggests that you have taken offence!
I can’t actually recall what is in the ACS to get a boiler ticket, but I do know that you use to have to do a FGA course, but is now part of the Boiler module. I still do not understand how you can be registered for boilers, especially as a new guy, without having learnt about FGA’ing - holding the ticket says you are competent.

Has the industry gone mad?

Does it really matter fire least he’s asking as he’s unsure

We can still ask questions we all don’t know everything

If you can help help if not don’t comment simple