TM 9-2320-386-10 2-95 2-43. OPERATION OF ARCTIC WINTERIZATION KIT a. General. The arctic winterization kit is installed to permit continued opera- tion of vehicles in temperatures -25°F (-32°C) or less. The kit includes a hardtop clo- sure, fuel burning personnel heater, power plant heater, swingfire heater, radiator cover, and thermal barrier. b. Special Arctic Winterization Kits. All ESP vehicles may be equipped with one of two types of special arctic winterization kits: (1) Multifuel Heater Arctic Winterization Kit – Includes the arctic win- terization kit listed above as well as the cargo body arctic kit. All heaters draw fuel from vehicle fuel tank. (2) Swingfire Heater Arctic Winterization Kit – Includes the arctic win- terization kit as well as the cargo body arctic kit. Fuel burning personnel heater draws fuel from vehicle fuel tank. Power plant heater and cargo body heater are powered by swingfire heater (refer to para. 2-48) which has its own fuel tank and may use only gasoline. c. Hardtop Closure. Refer to para. 2-4. d. Operation of Fuel Burning Personnel Heater and Power Plant Heater. NOTE This procedure covers multifuel heater operation only. For cover- age of systems equipped with swingfire heater, refer to para. 2-48. (1) General. Fuel burning personnel heater provides heat to warm vehicle cab and defrost windshield while engine is running. Power plant heater preheats engine coolant, engine, and batteries in preparation for starting in extreme cold or to maintain engine in standby readiness. Since operating procedures for these heaters are similar, they will be explained together. CAUTION Do not operate fuel burning personnel heater and power plant heater at the same time. Doing so may result in overworked elec- tric fuel pump. NOTE Refer to para. 2-4 for location and function of heater controls and indicators. (2) Open personnel heater shutoff valve, or power plant heater shutoff valve as necessary by turning counterclockwise.