Huge gas rate

[GrahamM]

How can you work out the gas consumption and tell if the boiler is working safely as it was designed if you don't gas rate it?
With respect sparra I think you are getting confused somewhere here. You MUST have a gas rate!

 

[armourer]

Gas rate is taken at maximum output and on any boiler I have ever worked on that is DHW, just open a tap or two.

 

[sparra1100]

How can you work out the gas consumption and tell if the boiler is working safely as it was designed if you don't gas rate it?
With respect sparra I think you are getting confused somewhere here. You MUST have a gas rate!

totally agree with you graham am just going off what i was taught if you come to my house al show you in my portfolio you can only take the inlet working pressure on an A rated boiler

 

[gaspastemania]

Most guys on here are pretty clued up but it sounds like your doing your gas rate wrong imo .

 

[GrahamM]

Back to basics sparra.
You MUST either take a Burner Pressure or Gas Rate to confirm the safe operation of a gas boiler. (and ideally both where possible) There is NO exception to this!!!
Don't know what you think you have been taught, but it is wrong.
A zero governed 24KW boiler may be consuming 34KW of gas. This is operating outside the manufacturers safe design limits; so how can you confirm this if you do not gas rate it?:banghead:

 

[SimonJohns]

Back to basics sparra.
You MUST either take a Burner Pressure or Gas Rate to confirm the safe operation of a gas boiler. (and ideally both where possible) There is NO exception to this!!!
Don't know what you think you have been taught, but it is wrong.
A zero governed 24KW boiler may be consuming 34KW of gas. This is operating outside the manufacturers safe design limits; so how can you confirm this if you do not gas rate it?:banghead:

Agree. Inlet working press could stil be right. No matter what the rating

 

[fuzzy]

check no other gas on, thats got me a few times!!!!!!

 

[SimonJohns]

Are you takin meter readings on an imperial meter and applying a modern method of calculation

On an imperial you have to time one full rotation of the dial. Not figure before and afterward

 

[GQuigley67]

when i fill out the benchmark and I get to the point where it asks for burner pressure or gas rate, I don't just write 0 in burner pressure and walk away because its a zero governor, I do a gas rate, and thats the way I have been taught and been told by manufacturers and I'm guessing everyone else knows that aswell so something is not right, how do you do your gas rate if you dont mind me asking ?

 

[richardd]

Have you checked the injector of a larger kw boiler hasnt being installed by someone previously.

 

[richardd]

Did you check the correct injector is installed . Someone may have put an enlarged injector into the boiler previously.

 

[sparra1100]

Agree. Inlet working press could stil be right. No matter what the rating

hence cpa 1 if your gas rate is high your analyser will tell you by high ratio,s and co/co2 readings which is why cpa come in due to zero governers

 

[SimonJohns]

hence cpa 1 if your gas rate is high your analyser will tell you by high ratio,s and co/co2 readings which is why cpa come in due to zero governers

Not true

Analyser just tells you if you have good combustion

 

[stevie]

What gas rate clac did you use ? can you show us? and what meter type is it ? ... metric ?

Not trying to catch you out, just would like to get to the bottom of this.


You can Gas rate a band A boiler , even if it modulates down for a moment, you still wont get the kind of results your saying.

Cheers

Ste

 

[GrahamM]

hence cpa 1 if your gas rate is high your analyser will tell you by high ratio,s and co/co2 readings which is why cpa come in due to zero governers

Trust us here sparra. No one here is trying to give you a bum-steer. I do not know where you were taught or what you were taught, but based on your last few posts on this topic you are either getting slightly confused or were taught a load of rubbish.
Zero governed boilers have sealed burner units. As a mater of course the burner is not opened to inspect it. So how do we tell if all is ok?
Firstly, the boiler is gas rated to confirm it is burning the correct amount of gas, and secondly a FGA is carried out on the boiler to confirm it is combusting properly.
The inlet pressure just tells us the boiler is getting the required gas supplied to the boiler in first place. It does not mean the boiler is operating as intended because you can confirm it is getting 20 mbar gas to the inlet.

I will say again...YOU MUST CARRY OUT GAS RATE AND A FGA ON A ZERO GOVERNED BOILER to confirm safe operation of appliance. This in non-negotiable! Please refer to [GSIUR reg. 26(6) paragraph 9]

 

[sparra1100]

graham i no your not giving me a bum steer i agree with everything your saying you have to gas rate everything i no how it works what its for and why we do it but you carnt gas rate an A rated boiler and am not going to change on this unless i read it in the mi,s of a boiler cos i had to re-write all my sheets on A rated boilers for my portfolio because of this, we just have to beg to differ there were 4 or 5 people who all said the same one of them was one of the best blokes ive ever met and no,s his stuff inside out anyway were never going to agree so best moving on from it mate

 

[SimonJohns]

I think you should just take some advice off people who don't have to fill out a portfolio on their work

You CAN and have to gas rate the appliance

From what your saying its making me think that you may have rated it wrong

 

[mfgs]

sparra, you are wrong. Its not up for discussion, you can and HAVE to gas rate A rated boilers. Anyone who thinks otherwise should not be working on gas appliances for a living. I am now willing to bet you have gas rated it wrong, get someone who knows what they are doing to have a look at the boiler as you clearly dont. People have tried to help and point you in the right direction and tell you what needs doing, but you just dont want to listen.

 

[SimonJohns]

Ideal icos 12he
Page 35
Box 44
Item 11. Check gas consumption


Sparra you need to read the mi's again!

 

[Stu.roberts]

Are u getting burner pressure and gas rate confused?

 

[Hybrid]

I'm looking at the MIs and it states in the benchmark checklist that the CH heat input must be calculated and gives the formula for gas rating above, has gas rating under box 37, checking gas consumption as part of servicing in box 39.

Scary.

 

[royston]

Inspectors are really keen on gas rating, they have you rating everything A rated boilers including.

 

[CMairiD]

I just had my inspection last week and the inspector most certainly wanted to see gas rates on the Greenstars I did.

 

[sheff paul]

Hi.
Doing gas rate on Ideal Icos he12 condensing boiler,I've got result of 34kW input.Boiler got zero governor gas valve.Combustion test point is not present and flue terminal is somewhere on the roof.Can someone advise me,please,is that gas valve adjustable or it is just broken and needs to be replaced?Regards[/QUOTE

Hi lads new to this site,but can you time the test dial for full revolution if imp meter,if metric give the readings before and after you gas rated and that should check it this one is a bit of a mystery

 

[richardd]

The wrong injector has been put in this boiler by someone as i have stated before .

Its the only logical answer