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1. Slightly press in control knob and turn counterclockwise to the LOW or HIGH positions (VN12A) or ON position (VN6B). IMPORTANT:Release downward pressure while turning control knob. Control knob will lock at the desired position. Control VN12A Control VN6B Knob Burners Knob BurnerOFF OFF PILOT PILOT ON LOW OFF OFF PILOT HIGH OFF Figure 17 - Burner Patterns 18 OPERATING HEATER Continued INSPECTING BURNER TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1. Turn control knob clockwise to the OFF