TM-9-2350-277-10 Operator Manual M113A3 M577A3 M1064A3 M1068A3 M58 Download
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TM 9-2350-277-10 OPERATE NBC KIT — Continued 0080 00 4. Turn on heater to warm air coming into M42 mask by turning knob clockwise from OFF until light comes ON. NOTE Light may go on and off by itself during operation. This is normal; the light is lit only when heating element is on. 5. Adjust to desired warmth by turning knob clockwise to increase heat and counterclockwise to decrease heat. WARNING If it is very cold outside, there is danger of frostbitten lungs from inhaling cold air. Do not connect the hoses to your M42 mask canister until heater has run for at least 15 minutes. 6. Disconnect hose from orifice connector at your duty station. 7. Connect canister coupling to hose. 8. When through with NBC system, disconnect canister coupling from hose and connect hose to orifice connector. 9. Turn off heater by turning knob counterclockwise to OFF. NOTE Light should extinguish. If not, notify unit maintenance. 10. Turn blower off by setting NBC power switch to OFF. 0080 00-5 Change 2