Even changing a fan on a premix burner can alter the combustion characteristics! Had an exact example of this on a WB Greenstar last week. Gas valve changed 6 months ago and everything adjusted to nominal settings. Then the fan failed (!!) and with the new fan the FGA results change and the GV and 'volume control' on the intake both needed a tweak.
You need FGA for AGA's and Rayburns. Have to adjust the premix burners to get them within limits and thats on install and service. Its also used to check the internal flueways as normally the cast flue isnt accessable once installed.
You may not like a particular firm, I might not like the same or different firms, but your statement is not born out in practice. I have just had mine repaired (needed a new pump), and recalibrated £79 + vat. At least present facts for people to base their decisions on.
I always use my telegan for commisioning a new boiler. At the very least the manufacturer requires the following; Fan pressure, inlet standing/working pressure, CO ppm, CO2 %, efficiency, ambient/flue gas temp. I also make a note of the zero pressure, ratio, 02 and xs air. I send this info to the manufacturer and they keep a log for that boiler.
You may not like a particular firm, I might not like the same or different firms, but your statement is not born out in practice. I have just had mine repaired (needed a new pump), and recalibrated £79 + vat. At least present facts for people to base their decisions on.
they must of either ripped me off then or dropped there prices recently. They wanted to lower there prices. i also found the kane 400 a bit numb as i had to press really hard on the buttons to get them to work. I wouldn't have another kane as it needed repairing everytime it went in for Cal. Maybe i overworked the dam thing but i would of thought they were built for the stick we give them.
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