Chef's Grill IR-TEC IR2818-1 Manual Del Usuario página 28

Natural Gas Hose Connection
Remove the LP gas hose and regulator using a wrench, and attach the natural gas hose in its place. (Fig. 5)
Adjust valve control screw
1. Pull all the knobs off of valve stems. Adjust the screw in
the valve hole using the flathead screwdriver. Turn
screws two complete turns counterclockwise. ( Fig. 6)
2. Press all the knobs back onto valve stems.
3. After all the conversions are complete, return heat diffusers to firebox, followed by the grates and warming rack.
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Fig. 5
Valve hole
Fig. 6