Filling in Gas Cert

[amy]

Hi Guys,
I have seen many engineers omitting to fill in the operating pressure on the Gas Certificates, they say regs state heat input OR op pressure required or both, so have seen vast majority just fill in gas rate info and put N/A in operating pressure section, occasionally on fires they do both.
Is that ok.

 

[GrahamM]

For a HE appliance the inlet working pressure should be checked as per MI's. And gas rate done.
On a standard efficiency appliance an operating pressure and gas rate has to be done. It is possible to have a compliant gas rate and have a burner pressure that is over the manufacturers maximum so anyone who does not check this is incompetent in my view. At end of day it takes how many minutes to check an operating pressure?
The regs must be used in conjunction with the manufacturers instructions. They go hand in hand and a common sense approach must be used. The manufacturer is the expert when it comes to their appliance; how many do not require any input or operating pressures to be checked?

 

[amy]

Thx for that, I thought it suspect. I take it HE is high efficiency, this wording has never been used in college. I take it you mean condensing boiler.
Sorry to ask the most basic of questions.
Thankyou for your help.

 

[GrahamM]

Yes. 'HE' or High Efficiency boilers are usually condensing. Easier to use the abbreviation 'HE'.
You can't take a burner pressure on these, but you can at least check it is getting the correct inlet pressure as per the MI's as well as a gas rate. A quick FGA and Bob's your uncle.
In 15 mins or you have established if its getting the correct pressure of gas, if it's burning the correct amount of gas and wither it's consuming the gas efficiently.

 

[1alexmc]

Hi. was just browsing and thought it seemed like a good place to ask, when it says operating pressure on the cp12 does this refer to the gas inlet pressure of the appliance or the working pressure, i just put both and write next to them but was not sure.

thanks

 

[Billy Bob Bob]

working pressure

 

[Billy Bob Bob]

Yes. 'HE' or High Efficiency boilers are usually condensing. Easier to use the abbreviation 'HE'.
You can't take a burner pressure on these, but you can at least check it is getting the correct inlet pressure as per the MI's as well as a gas rate. A quick FGA and Bob's your uncle.
In 15 mins or you have established if its getting the correct pressure of gas, if it's burning the correct amount of gas and wither it's consuming the gas efficiently.

just to clarify graham you cant take burner pressures on a band a he,but you can on all band b he boilers

 

[1alexmc]

thanks

 

[GrahamM]

just to clarify graham you cant take burner pressures on a band a he,but you can on all band b he boilers

When I used the term HE I kind of refer to the highest efficiency zero governor boilers rather than the higher efficiency band b which are out the window now anyway, but thanks for the clarification.