Burner Power Point Flashcards
A burners main job is to
Mix gas and air
What allows air into the burner
Primary openings
What controls the amount of air that goes into the primary opening
Air shutter
What allows gas into the burner
Gas orifice
What controls the amount of gas sent to the burner
Orifice spud
Where does the gas and air mix
Throat
As velocity increases in the throat the
Pressure drops in mixer head
The pressure difference caused from the pressure dropping in the throat causes
The excess air around the burner to rush in
Three types of gas burners
Air mixing
Air supply
Flame pattern
When the gas and air mix and burn upstream this is called
Aerated burner
When the gas coming out doesn’t mix with the air before being ignited this is called
Non aerated burner
What are gas burners that are supplied atmospheric air called
Atmospheric burner
Can an atmospheric burner have air mechanically forced to it
No
A mechanical air supply is created by
Fan, blower, compressor
Do mechanical burners have gas supplied to them
No
What are the two types of atmospheric burners
Inshot burner
Upshot burner
An upshot flame is
Vertical
An inshot flame is
Horizontal
What are the 3 major factors in determining a proper flame
Color
Size
Shape
A blue color flame indicates
Good combustion
A yellow flame indicates
Improper combustion
A yellow flame produces small amounts of
Carbon monoxide (CO)
An orange flame indicates
Dust in flame
Protection on burners is off
Causes and remedies of a wavering flame
Causes:
Cracked heat exchanger
External drafts
Remedies: eliminate drafts
Repair or exchange the heat exchanger
Causes and remedies of floating flames
Causes:
Lack of combustion
Burners over fired
To much gas
Blocked flue
Remedies:
Check air supply and gas supply
Clean flue
Cause and remedies of flame rollout
Causes:
Lack of combustion air
Blocked flue
Burners over fires
Remedies:
Check air supply
Remove obstruction on flue
Readjust gas pressure
Causes and remedies for flashback
Causes:
Too much air
Burners under fired
Gas valve leaking
Remedies:
Reduce primary air
Increase gas pressure
Check orifice
Causes and remedies for a noisy flame
Causes:
Too much air
Noisy pilot
Remedies:
Decrease primary air
Reduce pilot gas
Secondary air opening is under the
Burner
