TM-9-2350-311-10

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994
TM-9-2350-311-10

  TM-9-2350-311-10 - Page 348 of 775

TM 9–2350–311–10
2–250
Change 3
2–17 OPERATING AUXILIARY EQUIPMENT
2–17.1
Personnel Heater (P/N 11669489–1 and 11669490–1)
a.
Starting
WARNING
Do not place flammable materials or explosives on or near personnel heater. To prevent injury to
personnel and damage to equipment, do not block or restrict the heater vent.
1
Turn MASTER switch (1) to ON.
2
Move HEATER SELECTOR switch (2) to LOW.
CAUTION
If recommended start times are exceeded, damage to the personnel heater can result by
burning out ignitor or ignition control register. Step (2.1) and step (2.2) only apply to the Global
heater. Steps (2.3) through step (4) only apply to the Hupp and Stewart-Warner heaters.
2.1
Push HEATER switch (2.1) to START and hold for four to seven seconds (no more than seven seconds,
or Global heater will go into an automatic shutdown/diagnosis mode). If heater detects a fault it will
automatically shutdown. If this occurs, notify Unit Maintenance.
2.2
Push HEATER switch (2.1) to RUN once heater starts.
2.3
Push HEATER switch (2.1) to START and hold. Set HEATER switch to RUN once heater starts
3
If personnel heater does not start within 2 minutes, move the HEATER switch (2.1) to OFF for 10
seconds, then immediately back to START and continue the attempt for an additional 1 minute.
4
If personnel heater has not started after performing step 3, move the HEATER switch (2.1) to OFF for 10
seconds, then immediately back to START, and make another 1 minute start attempt. This will make a
total attempted start time of 4 minutes. If the personnel heater has not started by this time, notify unit
maintenance.
WARNING
To prevent injury to personnel, the personnel heater must be operated for at least 5 minutes to
clear the personnel heater of all excess fuel introduced during starting. Fumes may accumulate
in the ventilating air circuit or the personnel heater may be damaged by reverse burning.
NOTE
The HEATER indicator light will illuminate when HEATER switch is in START or RUN position.
5
After the personnel heater starts, operate it on either HIGH or LOW heat by appropriate position of the
HEAT SELECTOR switch (2).


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