TM 5-4520-244-14
HEATER OPERATION
A
Gasoline engine (1) is set into operation by means of a starter rope.
The engine
speed is 3450 to 3750 rpm.
The engine is direct-coupled to fan (2). A portion of the fan air is used for the
B
burning fuel, the remainder is heated and forced out as hot air,
c
A belt from the engine drives fuel pump (3) and magneto (4). Fuel pump (3) pumps
gasoline from tank (5) into the combustor section of the heat exchanger (6).
Engine (1) has its own fuel pump which pulls gasoline from tank (5) for engine
operation.
In the combustor section of the heat exchanger, fuel is sprayed through a nozzle.
D
Alongside the nozzle is an igniter, which is similar to a spark plug. Magneto (4)
delivers high voltage to the igniter to produce an electric arc. The arc keeps
the gasoline burning at the nozzle.
A combustion plate in the heat exchanger separates the heated air from the air used
E
for burning fuel. Burning fuel fumes and the gasoline engine exhaust are expelled
through exhaust stack (7). Clean, heated air blows out of heat exchanger (6).
Ducts carry heated air to the location to be heated,
Controls (8) allow adjustment of the combustion flame for various outlet air
F
temperatures. Gages indicate air-temperature and fuel level in the gasoline tank,
Heater Operating
Principles
Figure 1-3.
1-7
