TM 9-2320-209-10-1 b. Arctic Winterization Kit Controls and Indicators. 1. HI-LO switch. Controls the rate of fuel burning and speed of blower in personnel heater. 2. Red indicator light. Is on when the personnel heater is operating. 3. START-OFF-RUN switch. Is set to START position to start personnel heater. Set to RUN position to run heater and to OFF to stop heater. 4. Air control knob. Is pulled all the way out to get maximum air flow, is pushed in to lower or shut off air flow. 5. DEFROSTER control knob. Is pulled all the way out for maximum defroster operation. Is pushed in for maximum heater operation; is placed half way out for combination defroster heater operation. 6. EMERGENCY switch. Is for emer- gency conditions only. When switch is placed in down position, fuel flow to heater stops immediately and blower motor is shut off. 7. HI-LO switch. Controls rate of fuel burning and speed of blower in power plant (engine) heater. 8. Red indicator light. Is on when power plant heater is operating. 9. START-OFF-RUN switch. Is set to START position to start power plant heater, to RUN position to run heater and to OFF to stop heater. 4-24