TM 5-4520-241-14
KEY to figure 2-1:
1.
EXTERNAL FUEL PUMP RECEPTACLE
7.
RESET switch
2.
POWER RECEPTACLE
8.
FUEL OVERFLOW receptacle
3.
ROOM THERMO receptacle
9.
FUEL RECEPTACLE
4.
HEATER-OFF-FAN switch
10.
CIRCUIT BREAKER
5.
White indicator light
11.
Louver operating handle
6.
Red indicator light
2-3.
PREPARATION FOR STARTING.
a. Check the fuel supply to see that it is adequate for the period of operation, and verify that the fuel supply valve is
open.
b. Check the external fuel pump and fuel lines for leakage of damage. Notify organizational maintenance if any
leakage or damage is detected. Be sure the fuel pump is clean.
c. Check that the power cable plug, room thermostat plug, and external fuel pump plug are fully inserted in mating
receptacles with threaded swivels tightened.
2-4.
OPERATION IN HEATER MODE.
WARNING
Do not operate this heater in an enclosure unless exhaust gases are piped outside
of the enclosure. The exhaust gases contain carbon monoxide, a colorless,
odorless, deadly poisonous gas. Failure to provide proper elimination of the
exhaust will cause severe illness or death.
a. Check the setting of the temperature adjustment knob on the room thermostat (fig. 2-2). Adjust to the desired
temperature.
b. Place the HEATER-OFF-FAN switch (4, fig. 2-1) in the HEATER position. The white indicator light (5) will come
on immediately. The heater will now operate under the control of the room thermostat. It will start when the thermostat
calls for heat and stop when the selected temperature is reached.
c. If the heater is extremely cold and combustion does not occur before flame failure shutdown, push the RESET
button. Then open the front access door and pull out the chock knob on the carburetor. Hold it out until ignition occurs
and you can hear combustion in the burner. The choke is only necessary when the heater is operating on diesel fuel or
fuel oil.
d. While the heater is running the ventilating motor circulates warm air from the discharge outlet.
2-5
