Adjustments

Gas Burner Air Shutter

PROPER AIRFLOW

NOTE: Air inlet shutters on the burner must be

 

adjusted so sufficient air is metered into the system

 

for proper combustion and maximum efficiency.

 

Before adjusting the inlet shutters, be sure that all

 

lint is removed from lint compartments and lint

 

screen.

 

Air shutter adjustment will vary from location to

 

location and will depend on the vent system, number

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of units installed, make-up air and line gas pressure.

Opening the shutter increases the amount of primary

INSUFFICIENT AIRFLOW

air supplied to the burner, while closing the shutter

decreases the primary air supply. Adjust air shutter as

 

follows:

 

1.Remove the upper access panel.

2.Start the tumbler and check the flame pattern.

Correct air and gas mixture is indicated if the

 

flame pattern is primarily blue, with small yellow

 

tips, and bends to the left of the heater section

 

(refer to Figure 20). Too little air is indicated if

1

the flame is yellow, lazy and smoky. A flame

 

pattern that flares to the right and left (refer to

NO AIRFLOW

Figure 20) indicates no air is flowing through the

 

tumbler.

 

3.To adjust the air shutter, loosen air inlet shutter adjusting screw (refer to Figure 20).

4. Open or close air shutter as necessary to obtain proper flame intensity.

5.

After air shutter is adjusted for proper flame,

 

 

1

 

 

tighten air shutter adjusting screw securely.

 

 

 

 

 

 

 

T464I

 

 

 

 

6.

If the flame pattern is straight up (refer to

1

Air Shutter Adjusting Screw

 

Figure 20), insufficient primary air is flowing

 

 

 

 

 

through the tumbler and airflow switch is

 

Figure 20

 

improperly set.

 

 

 

 

 

 

M414038

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