TM 9-2320-361-10 2-6. SPECIAL PURPOSE KITS CONTROLS AND INDICATORS (Contd) Key 1 c. Arctic Winterization Kit. 2 3 4 5 6 7 8 Item and Function Hi-lo Switch controls the rate of fuel burning and speed of blower in personnel heater. Red Indicator Light illuminates when personnel heater is operating. Start-Off-Run Switch is positioned down to start personnel heater, up to run heater, and in center position to stop heater. Air Control Knob is pulled all the way out for maximum air flow, and pushed in to lower or shut off air flow. Defroster Control Knob is pulled all the way out for maximum defroster operation, pushed in for maximum heater operation, and placed halfway out for combination de froster/heater operation. Hi-Lo Switch controls the rate of fuel burning and speed of blower in power plant (engine) heater. Red Red Indicator Light illuminates when power plant heater is operating. Start-Off-Run Switch is positioned down to start power plant (engine) heater, up to run heater, and in center position to stop heater. 2-24