An FGA is pretty much the only way that you can identify a flue fault on a premix boiler.
I do have to say that I can usually adjust the mixture within useable service limits on many boilers without the FGA on a lot of boilers but I would always expect to check the setting at the first opportunity afterwards. The ignition sound is a very good clue that the mixture is not far out.
Yet again in a big city, an FGA is another piece of expensive equipment which atracts thieves and I only take one when I expect I may need it.
I cannot imagine how any RGI can do without one even if they are only installing boilers using premix.
For fault investigation they are essential for flue faults or where unqualified have been fiddling!
Tony
Tony
I do have to say that I can usually adjust the mixture within useable service limits on many boilers without the FGA on a lot of boilers but I would always expect to check the setting at the first opportunity afterwards. The ignition sound is a very good clue that the mixture is not far out.
Yet again in a big city, an FGA is another piece of expensive equipment which atracts thieves and I only take one when I expect I may need it.
I cannot imagine how any RGI can do without one even if they are only installing boilers using premix.
For fault investigation they are essential for flue faults or where unqualified have been fiddling!
Tony
Tony