Article: For most propane tanks, you'll need to turn the knob counterclockwise until it won't turn anymore to turn the tank on. Check the arrows on the knob to make sure. Don't ever light the grill with the lid closed or gas buildup could cause an explosion. " You may need to press the knob in before you can turn it. To locate the ignition burner knob on the grill, look for the knob with a lightning-bolt symbol or the word "ignition" next to it. Don't worry if the grill doesn't ignite after you turn the knob; that just means the grill has an electric starter and you'll need to press the electric ignition button to ignite it. Look for the electric ignition button next to the ignition burner knob. Press and hold the button until you see flames ignite in the grill. It's normal for the button to make a clicking noise as you press it. Only the section of the grill directly behind the ignition burner knob and electric ignition button should be lit at this point. The rest of the grill knobs should still be turned off. Turning on the other grill knobs should cause the rest of the grill to ignite. Always let the grill preheat before cooking on it so the food gets cooked all the way through.

What is a summary?
Turn on the propane tank by using the knob on the top of the tank. Open the grill lid before lighting it. Turn the ignition burner knob from "off" to "high. Press the electric ignition button if the grill has one. Turn the other grill knobs to the highest setting to preheat the grill. Close the grill lid and let the grill preheat for 10-15 minutes.