Adjustment
screw
Adj.
slot
Close
Fig. 33-2

BURNER AIR SHUTTER ADJUSTMENT

AIR SHUTTER ADJUSTMENT

1.Follow the safety precautions and steps for

Important: Air shutters are preset at the factory based on the gas the grill is built to burn. However, altitude or other local conditions may require air shutter adjustment for proper combustion.

MAIN BURNER

Flames from a properly adjusted main burner with

main burner removal in the CHANGING THE MAIN BURNER ORIFICES section (steps 1-4).

2.Adjust the air shutter

opening by loosening

the adjustment screw with a screwdriver,

Open

no wind or breeze present will appear fairly steady, consistent, and almost entirely blue.The extreme tips of the ß ames may be light yellow. If the tip of a ß ame were to turn orange, it should only do so brieß y and then become blue or light yellow again. The ß ames will appear to burn while touching the burner ports (see Figure 33-1).

If the ß ames have orange in them and appear to undulate slowly from side to side, or if some of them appear to lift off the burner instead of touching it, then adjust the air shutter, as instructed below.

Carry-over

Bridge

Fig. 33-1

slits (on

between

 

each lobe)

burner

 

 

lobes

 

Ignitor

box

Blue ß ames on

Lighting

burner ports

tube

CAUTION: Turn all burner control knobs to the OFF position and turn off the gas supply at the source before removing or adjusting a burner.

WARNING

Wait for the burner to be cool or use heavily insulated heat-resistant gloves when handling the burner.

then sliding the air shutter backward or forward to open or close the air shutter opening (see Fig. 33-2).

Shutter Setting

Flame Condition

Open too far

Flames shorten and

lift off the burner

 

 

Blue flames just

Ideal setting

touching burner (may

 

have light-yellow tips)

 

 

Closed too far

“Lazy” flames with

orange in them

 

Too large an air shutter opening will allow too much air into the burner, which will cause the ß ames Þ rst to shorten and then to appear to lift up off the ports. For the bottom of the ß ames to move closer to the ports, close the air shutter more.

If the air shutter opening is too small or closed, the

ßames will present consistently orange tips and become Òlazy,Ó slowly undulating back and forth.

For propane gas, ideal settings tend to be just slightly open. For natural gas, which generally requires less primary air than propane, the main burner air shutter may be nearly closed.

3.Adjust the air shutter opening and then replace the burner (steps 6-8 in the CHANGING THE MAIN BURNER ORIFICES section)

4.Follow the lighting instructions in this manual to light the burner.

5.Repeat steps 1-4 until the ß ames appear to touch the burner ports, burning fairly steadily and almost entirely blue with occasional light- yellow tips (see Fig. 33-1).

33