TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
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TM 9--2350--311--10 Change 3 2--251 2--17 OPERATING AUXILIARY EQUIPMENT — CONTINUED 2--17.1 Personnel Heater (P/N 11669489--1 and 11669490--1) — Continued b. Shut-Down WARNING To prevent injury to personnel, do not use the MASTER switch to shut the personnel heater down. Fuel vapors will accumulate in the ventilating air circuit, and the personnel heater may also be damaged by reverse burning. Shutting Down Hupp and Stewart Warner Heaters To stop personnel heater operation, move the HEATER switch (2.1) to the OFF position. The blower will continue to operate for approximately 3 minutes to allow the system to cool. If blower continues to operate or otherwise malfunctions, notify unit maintenance. Shutting Down Global Heaters Move HEATER switch (2.1) to OFF position. Global heater will enter purge mode and after four minutes it will automatically shutdown. 2 1 STEWART-WARNER HUPP GLOBAL 2.1