combustion testing, flame failure

[billyp7999]

have done a few combustion tests this year and two out of the ten have had intermittent flame failures my numbers are all good on my combustion test but flame failures once in a while. also in low fire the burner flame has more orange then id like to see, any thoughts. btw no flame failures prior to my testing

[Tommy knocker]

What are we talking about here? MUA, boiler, direct fire, a little help here.

[billyp7999]

fire tube boiler, power burner

[gravity]

gas or oil?

[The Juice]

Check the flame sensing rod signal, does it have a honeywell burner control on it? what type of boiler is it?

[heresjohnnyb]

We need your #'s you left these units at to help.

[Pascone10]

Give us EVERYTHING you know about these units. I had a similar problem this season on a Gordon Piatt. I think I got it squared away. Post gas pressures and breech/ over fire pressures, and your combustion results in high/low fire if applicable. Also when is the failure? During PTFI or another step? WHat did you do to adjust the burner in the beginning of the season that changed that possibly caused the Lock Outs?

[Jim Davis]

First of all the combustion analyzer determines if the flame color is good or bad not eye sight.

Does it fail during the day or only at night?

Does the flue have a barometric?

Direct spark ignition or pilot?

What is the O2 in low-fire? and CO

Checking the flame signal is always important especially if it is marginal.
It should be checked with the pilot only on and then in low fire and high fire

Back when I worked for a wholesaler that sold Fireeye and Flame Safeguard, 9 out 10 burners controls that were brought to us to be tested because of flame failures, tested to be good. That's when I decided combustion testing must be a mandatory tool.