TM 9-4520-258-14
Section III. OPERATION UNDER USUAL CONDITIONS
2-7.
ASSEMBLY AND PREPARATION FOR USE.
a.
General Precautions
(1)
Do not operate the heater unit in fuel vapor areas or in areas lacking adequate ventilation to support heater
fuel combustion.
(2)
Do not smoke or use open flame in the vicinity when filling fuel tank.
(3)
Always provide metal-to-metal contact between fuel container and fuel tank to prevent a spark from being
generated.
(4)
Do not operate the heater unit inside a building unless the exhaust gases are properly vented to the
outside.
(5)
Be sure the air duct covers and combustion air inlet cover are removed prior to operation.
(6)
A 50-lb (22.7 kg) capacity carbon dioxide fire extinguisher should be available on a standby basis in the
area the heater unit is operated.
(7)
Do not restrict ventilating or combustion airflow. Equipment damage and/or improper operation will occur.
(8)
Perform Operator Before PMCS, notify unit maintenance if any discrepancies found.
b.
Fuel Tank Selection (Refer to Figure 2-3)
(1)
Check fuel gage (1) and service internal fuel tank as required. (Refer to para 2-7c.)
CAUTION
Never attempt to operate the ASH Unit with the fuel selector valve handle in a vertical position.
Damage will occur. Fuel will not flow with the handle in the vertical position. The fuel selector
valve handle must be in a horizontal position.
(2)
Set the fuel selector valve (2) to the INTERNAL TANK position.
(3)
If external fuel line (3) is attached to the unit external fuel connection (4) and a fuel source, set fuel
selector valve (2) to the EXTERNAL TANK position.
2-21
