TM 9-2350-287-20-11-16. EQUIPMENT OPERATION (continued).NBC VENTILATED FACE PIECE SYSTEMThe ventilated face piece system (VFPS) provides clean, filtered air for the crew and personnel under NBC situations.The system includes one air precleaned/particulate filter unit with four filtered air outlets, four M3 air heater, four outletconnectors, and one NBC power control box.The air precleaned/particulate filter is located in the lower left rear of the crew compartmentmounted forward from the precleaned. One air heater is located in the driver’s compartmentis located on the left side of the crew compartment ceiling and is controlled by the user.When not in use, hoses are connected to outlet connectors that function as one-way valvesThree air heaters areThe NBC control boxallowing system air toescape and preventing backflow. When in use, the hoses are disconnected from outlet connectors and are connectedto canister packs on face masks used with the system.Each filtered air outled has an M3 air heater connected in-line to allow air temperature to be individually controlled bythe user.1-29
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