Burner Power Point Flashcards

1
Q

A burners main job is to

A

Mix gas and air

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2
Q

What allows air into the burner

A

Primary openings

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3
Q

What controls the amount of air that goes into the primary opening

A

Air shutter

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4
Q

What allows gas into the burner

A

Gas orifice

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5
Q

What controls the amount of gas sent to the burner

A

Orifice spud

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6
Q

Where does the gas and air mix

A

Throat

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7
Q

As velocity increases in the throat the

A

Pressure drops in mixer head

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8
Q

The pressure difference caused from the pressure dropping in the throat causes

A

The excess air around the burner to rush in

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9
Q

Three types of gas burners

A

Air mixing
Air supply
Flame pattern

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10
Q

When the gas and air mix and burn upstream this is called

A

Aerated burner

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11
Q

When the gas coming out doesn’t mix with the air before being ignited this is called

A

Non aerated burner

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12
Q

What are gas burners that are supplied atmospheric air called

A

Atmospheric burner

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13
Q

Can an atmospheric burner have air mechanically forced to it

A

No

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14
Q

A mechanical air supply is created by

A

Fan, blower, compressor

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15
Q

Do mechanical burners have gas supplied to them

A

No

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16
Q

What are the two types of atmospheric burners

A

Inshot burner
Upshot burner

17
Q

An upshot flame is

18
Q

An inshot flame is

A

Horizontal

19
Q

What are the 3 major factors in determining a proper flame

A

Color
Size
Shape

20
Q

A blue color flame indicates

A

Good combustion

21
Q

A yellow flame indicates

A

Improper combustion

22
Q

A yellow flame produces small amounts of

A

Carbon monoxide (CO)

23
Q

An orange flame indicates

A

Dust in flame
Protection on burners is off

24
Q

Causes and remedies of a wavering flame

A

Causes:
Cracked heat exchanger
External drafts

Remedies: eliminate drafts
Repair or exchange the heat exchanger

25
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
26
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
27
Causes and remedies for flashback
Causes: Too much air Burners under fired Gas valve leaking Remedies: Reduce primary air Increase gas pressure Check orifice
28
Causes and remedies for a noisy flame
Causes: Too much air Noisy pilot Remedies: Decrease primary air Reduce pilot gas
29
Secondary air opening is under the
Burner