Ensure all burners are in the "OFF" position (horizontal).
Turn propane on at the tank and wait 5 minutes before ignition.
Make sure that you have an ignition source ready to go.
Turn one burner only to "ON" position (valve handle pointing out from barbecue). Ignite from the top of the unit. By holding flame on the lava rock in front of where the gas valve is situated (the burner is a long straight tube that comes directly from the burner valve).
When burner is fully lit, turn on the immediately adjacent burner. Repeat until all 4 burners in section are lit. Repeat process in second section.
When finished, turn propane off at the tank and allow flames on grill to extinguish.