TM 9-4520-272-14&P
0005 00
Operating from an external fuel supply.
WARNING
The LCFH should not be positioned any closer than 2 feet from an external
bulk fuel supply. Placing the heater closer than 2 feet from a bulk fuel
supply may result in fire or explosion causing serious injury or death.
WARNING
The external fuel connection should not be used if the internal fuel tank is
ruptured or otherwise leaking as the fuel system utilizes a continuous fuel
loop-back design. Using the external fuel connection when there is a
rupture or leak in the internal fuel tank may result in fire or explosion
causing severe injury or death.
WARNING
Hearing protection should be worn when heater is operating with any of the
access panels open or closed. Failure to wear ear protection could result in
hearing loss or damage.
CAUTION
The external fuel supply should be located no more than 25 feet from the heater as the
external fuel hose is 25 feet in length. The external fuel hose must not be lengthened by
adding additional sections as this may place additional demands on the electrical fuel
pump in the heater.
NOTE
The external fuel supply should be place slightly uphill from the LCFH to aid in fuel flow.
NOTE
The LCFH can be switched from internal to external fuel mode (or vice versa) while the
heater is operating. However, if the internal fuel tank is very low on fuel or empty, there
may be a period of time when the heater sputters or runs erratically while air is purged
from the external fuel hose. Allow the heater to run until all air is expelled and the heater
resumes normal operation. A discussion on the operation of the fuel supply can be found
in WP 0003 entitled Theory of Operation.
To operate the LCFH from an external fuel source, retrieve the 25-foot external fuel hose (1) from its
storage location on the inside of the engine access panel (2). Close engine access panel after the hose
has been removed.
0005 00-11
