What should my combustion analysis be?

What should my combustion analysis be?

A typical reading would be 2% to 6% (see Figure 2). I like adjusting the air for the middle of the acceptable range in case the blower wheel gets dirty and delivers less air for combustion.

What is the acceptable co When looking at the combustion analyzer?

The production of carbon monoxide (CO) in the flue gases should be kept below 100-ppm air-free, even though the allowable limit in the stack is 400-ppm air-free.

How do you perform a combustion analysis?

In combustion analysis, a sample of known mass is combusted, and the resulting carbon dioxide and water vapor are captured and weighed. The relative amounts of carbon, hydrogen, and oxygen in the starting compound can be determined from the masses of the products of the combustion reaction.

What causes high CO readings?

Possible Causes of High Carbon Monoxide (CO) Emissions Fuel can only come from three sources: the crankcase vapor control system, the evaporative control system, or the actual fuel delivery system.

What causes high CO readings on boiler?

If the oxygen level is set too low and something changes the combustion process can become ‘fuel rich’ as there is insufficient oxygen for all the fuel to burn. This can cause high levels of CO to be generated and in the extreme enough fuel to enter the boilers flue and ignite (explode) outside the combustion chamber.

What is acceptable level of CO?

0-9 ppm CO: no health risk; normal CO levels in air. 10-29 ppm CO: problems over long-term exposure; chronic problems such as headaches, nausea. 30-35 ppm CO: flu-like symptoms begin to develop, especially among the young and the elderly.

What is perfect combustion?

Perfect combustion is simply a mixture of fuel and oxygen, with both being completely consumed in the burning process. The ideal situation would be to provide just enough air in the combustion chamber to insure complete burning of the fuel.

What is the ideal o2 content of flue gas?

In residential furnaces, optimum fuel-air ratio results in the oxygen level being reduced from 21% (fresh air) to between 8.5-10% oxygen by volume after combustion. To test the oxygen level, a tool called a combustion analyzer is used to measures the amount of oxygen remaining in the flue exhaust gas.

What is the ideal CO2 content of flue gas for a gas furnace?

Carbon dioxide – CO2 – is a combustion product and the content of CO2 in a flue gas is an important indication of the combustion efficiency. Optimal content of carbon dioxide CO2 after combustion is approximately 10% for natural gas and approximately 13% for lighter oils.

What causes high CO in furnaces?

The air from the furnace circulates around the outside of the heat exchanger. If there’s a crack in the exchanger, the air runs across the burner and causes incomplete combustion and, in turn, creates a carbon monoxide buildup. Older appliances typically have poorer ventilation than newer units.