TM 9-4520-272-14&P
0005 00
INITIAL OPERATOR CONTROL BOX SETTINGS
Before powering up the LCFH, the controls on the operator control box (1) need to be set in the
appropriate positions as follows.
If the heater is to be operated using the internal fuel tank only, place the fuel selector switch (2) in the
INTERNAL position. If the heater is to be operated using an external fuel supply, place the fuel selector
switch in the EXTERNAL position.
Determine whether the heater will be operated in MANUAL, VENT, or AUTO mode. Place the operating
mode switch (3) in the desired position. In MANUAL mode, the heater will continue to generate heat
continuously until shut down. Heat output is not regulated by the thermistor (4) in the operator control box.
In VENT mode, the heater will not generate heat and will blow fresh, unheated air into the shelter. In
AUTO mode, the heat output of the LCFH is regulated by the temperature control (5) on the operator
control box and the installed thermistor (4). When the temperature in the shelter reaches the temperature
preset on the operator control box, the heater will either shut down, go into half heat output mode, or go
into full heat output mode.
If the heater is to be operated in AUTO mode, set the temperature control (5) on the operator control box
to the desired position.
Once all controls on the operator control box are in the desired positions, the heater can now be powered
up as detailed in the section to follow.
0005 00-14
