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Gas Engineers > What is the correct procedure attending a boiler breakdown?

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Harvest Fields said:
Also @ShaunCorbs & @firemant isnt what you are both describing a KW rating and not a gas rating. A gas rating for a 30kw boiler is about 3.2kw not 30kw? Or am I missing something here?
Click to expand...

I don't quite understand your post, HF.
Probably strictly speaking, a gas rate would be measured in M3 but after saying Kw is not a gas rating, you go onto suggest it is.
A 30Kw boiler will be typically about 31/32Kw input, not 3.2. was that a typo?
 
firemant said:
I don't quite understand your post, HF.
Probably strictly speaking, a gas rate would be measured in M3 but after saying Kw is not a gas rating, you go onto suggest it is.
A 30Kw boiler will be typically about 31/32Kw input, not 3.2. was that a typo?
Click to expand...
I mean that this is a gas rate mate

3D31C1DB-8248-4A3D-9475-4FAF0E193CC2.jpeg
 
My figures are direct on the meter to give you x amount of kw
 
Harvest Fields said:
But my view is that what you are both taking about is an output rating not a gas rate.
Click to expand...

It is a gas rate (meter) comes out at 30kw

Eg

004.10
004.20

On the meter
 
Harvest Fields said:
I get that, but when you do this calculation 2.8 x 10.65 = 30 ish kw. The end figure which is 30 kw is not the boilers Gas rate it is an output rating.
Click to expand...

I don't get what your trying to say ?

You want the input rating ?
 
ShaunCorbs said:
its not hard if you know if you dont

write the number down time then write the numbers down work it out from there or time it if imperial

or if you do know what kw should give you like

.10 is 30kw
.095 is 28kw
.08 is 24 kw
.05 is 15kw
Click to expand...
My point is, that this is an input/output rating dependant on how far you got with your calculations and not a gas rate.
 
.

HF: Like Shaun, I am slightly confused as to your line of thought. The GAS RATE is the INPUT, which arguably should be measured in M3, but we tend to do the calcs to Kw. The chart you produced, IIRC, showed the input in M3. So it IS the rate chart, as you understood.

But where are you reading your figures? The chart shows a 30Kw boiler as having a nominal input of 3.27M3.

Incidentally, that is the figure often copied onto the benchmark ;)
 
I think we are arguing the same thing mate. But I call the figure in the bold circle the gas rate and the figure in the thin circle the input/output rating. Ignore the exact figures I wasn’t getting them from anywhere they were just random figures :D:D

6122976A-44C0-445D-8B59-E18329059947.jpeg
 
Harvest Fields said:
I think we are arguing the same thing mate. But I call the figure in the bold circle the gas rate and the figure in the thin circle the input/output rating. Ignore the exact figures I wasn’t getting them from anywhere they were just random figures :D:D

View attachment 35478
Click to expand...

Blimey, HF, they reckon a marathon is hard work :).
Yes, the 30Kw (thin circle) is the nominal output - but I don't really get your " input / output rating" description. it is simply the designed Output.

The (thick circle) IS the nominal Input, therefore the "gas rate" you are looking for. However, most of us, I think, would present the "gas rate" in KW/hr's.

So, yes, essentially we are in agreement.

What was your question? :)
 
firemant said:
Blimey, HF, they reckon a marathon is hard work :).
Yes, the 30Kw (thin circle) is the nominal output - but I don't really get your " input / output rating" description. it is simply the designed Output.

The (thick circle) IS the nominal Input, therefore the "gas rate" you are looking for. However, most of us, I think, would present the "gas rate" in KW/hr's.

So, yes, essentially we are in agreement.

What was your question? :)
Click to expand...
I don’t have one:D:D:D it’s been a long day. Sorry mate.
 
Harvest Fields said:
Input/output

View attachment 35480
Click to expand...

Input/output are 2 different things on that data badge

That is a 24Kw boiler? The 24Kw is the advertised OUTPUT, but the actual MAXIMUM OUTPUT, as it happens, is 24.7Kw.
(Advertising a 24.7Kw boiler as such is not as snappy as saying "24", although I do not know why they don't just do the data plate at an Input relating to a 24Kw output. But they are not alone)

The MAX INPUT is 25.7Kw. The boiler is range ratable, between 11Kw and 25.7Kw INPUT. It is this range which you would be looking for, and verifying against, when as rating.
 
firemant said:
Input/output are 2 different things on that data badge

That is a 24Kw boiler? The 24Kw is the advertised OUTPUT, but the actual MAXIMUM OUTPUT, as it happens, is 24.7Kw.
(Advertising a 24.7Kw boiler as such is not as snappy as saying "24", although I do not know why they don't just do the data plate at an Input relating to a 24Kw output. But they are not alone)

The MAX INPUT is 25.7Kw. The boiler is range ratable, between 11Kw and 25.7Kw INPUT. It is this range which you would be looking for, and verifying against, when as rating.
Click to expand...
I understand that mate. But what I was saying is that at college here. We are taught that the gas rating is the lower figure and the output rating is the higher figure. That is what I was saying.
 
Harvest Fields said:
I understand that mate. But what I was saying is that at college here. We are taught that the gas rating is the lower figure and the output rating is the higher figure. That is what I was saying.
Click to expand...

Back to front, HF. Or is that a typo.? Are you still training, HF?

The Gas rate is the Consumption (Input) (higher figure), which HAS to be greater than the OUTPUT (lower figure).


(I KNOW, before someone comes back with 103% efficiency :) )
 
firemant said:
Back to front, HF. Or is that a typo.? Are you still training, HF?

The Gas rate is the Consumption (Input) (higher figure), which HAS to be greater than the OUTPUT (lower figure).


(I KNOW, before someone comes back with 103% efficiency :) )
Click to expand...
I’m too tired to carry this on mate. I will just agree with you.
 
firemant said:
Okay. But you really do need to know. It is actually not difficult. You need to speak to your trainer, if you are, in fact, still training.
Click to expand...
Mate. Let me explain this to you. Either we have got crossed wires here or it is not me that is wrong. What it sound like you are talking about is a equivant heat input. (Not a gas rate) a gas rate is how much gas an appliance uses in 1 hour, not the figure you get once you times this figure by 10.65, or whatever calorific value you are using. (This figure is an input rating) I cannot explain it any clearer. The diagram below if the best I could find.

A1F9F8B5-14A5-4BB4-9A1F-90370EC9D97D.jpeg
 
firemant said:
Okay. But you really do need to know. It is actually not difficult. You need to speak to your trainer, if you are, in fact, still training.
Click to expand...
Mate. Let me explain this to you. Either we have got crossed wires here or it is not me that is wrong. What it sound like you are talking about is a equivant heat input. (Not a gas rate) a gas rate is how much gas an appliance uses in 1 hour, not the figure you get once you times this figure by 10.65, or whatever calorific value you are using. (This figure is an input rating) I cannot explain it any clearer. The diagram below if the best I could find.
firemant said:
Okay. But you really do need to know. It is actually not difficult. You need to speak to your trainer, if you are, in fact, still training.
Click to expand...
I’ve been qualified for 12 years mate. Not ages but long enough.
 
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