Positive Presure Testing

[ifatfirst]

need to do a positive pressure test using a gas anaylizer. what type of gas appliance is best to do this test on, my mentor is leaving it up to me to sort out as part of my training, so i thought i would ask the forum>
thanks

 

[kirkgas]

need to do a positive pressure test using a gas anaylizer. what type of gas appliance is best to do this test on, my mentor is leaving it up to me to sort out as part of my training, so i thought i would ask the forum>
thanks

its probably just me but i dont understand what you mean by a positive pressure test, do you mean a check on the combustion chamber seal of a positive pressure boiler? if so i dont use an anaylser for this but a lit taper, any leaks on the seal blows out the flame,

 

[GreenArmy]

As kirkgas says, you need to confirm from your mentor what he wants you to do as with a positive pressure gas appliance you will test the case seal with a lit taper. Do you have the Corgi Essential Gas Safety (5th Edition) book? If so read page 332 to 338.

 

[CMairiD]

My college tutor suggested using a FGA around the case seals of a positive pressure boiler, though he did say that it's far more common to use safety matches.

 

[GrahamM]

Unless there has been a recent TB released that I am not aware of, it is not standard practice to test for the integrity of a positive pressure seal using a FGA.
The procedure as far as I am aware is to use a smoke match or preferably a smoke pen as it gives a much more controllable burn.

 

[ifatfirst]

Thanks for all your comments so far.
I am building my portfolio, training through Logic Certification, and one of the tasks that i must do is a positive pressure test. I understand that this test is carried out on a combi boiler. I was told that this must be carried out using a flue gas anaylizer. As per pages 332 to 335 of 5th edition I understand that you check and inspect the case seals, then you must use the flue gas anaylizer to check for POC`s.
I think that this may be a different way of testing, as my 2 mentors say the same, as they use a smoke match/pen to test.
Still confused but................

 

[GrahamM]

I used a smoke pen/match to test the soundness of a positive pressure cover and as far as I am still aware this is the correct procedure.
I believe this is the correct approved method, using a FGA is not. If I brought out a FGA for for the positive pressure test during my ACS I would have got hit in back of head with it.
The odd Positive boiler I have come across has been tested with a smoke match.

Maybe someone can correct me if I am wrong.


Just dug out the corgi book (5th ed). No where that I can see does it mention using a FGA to test the integrity of the positive pressure seal, but it does mention in my BPEC safety manual that a FGA may be used in addition to a smoke match/taper.

 

[gbgas001]

agree with everyone with the positive fanned boilers, a lighter or match is the correct test,

It may also be talking about room combustion testing with your FGA as per the same british standards that deal with appliance testing.

Gb-gas