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Combustion Testing

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TomS
TomS Member Posts: 62
in Gas Heating
Tim, It seems that most manufacturers tell you to take combustion readings at full fire. Is there a reason for this? Lets say that you have a over sized mod con boiler and at max water temperature it is only firing at 50%. Wouldn't this be an appropriate level to take combustion readings? Thanks for any incite you can give me. Tom

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  • Tim McElwain
    Tim McElwain Member Posts: 4,621
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    No you should still over

    ride and go to full high fire for proper adjustment and measurement. Some will have you do a hi fire and also a low fire test, do what ever the manufacturer ask for. This will insure lets say with a 5 to 1 turndown that all steps are properly set up.
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