TM 3-4230-218-30&P
1-7.
GENERAL.
a .
The decontaminating apparatus has five major systems: the engine,
air system,
water system, heater system,
and electronic control system.
These systems provide a supply of pressurized, temperature-controlled water.
After the system is operating, the operator is required to periodically monitor
the output water temperature and fuel supplies.
b.
No external power is required to operate the system. Only a source
of water and fuel is needed.
Decontamination may be conducted in the follow-
ing three ways:
(1) Decontamination of material and equipment using the cleaning
wands.
(2) Decontamination of personnel using the showers.
(3) Decontamination using the injector and decontaminating agents.
1-8.
ENGINE PRINCIPLES OF OPERATION.
a.
The engine is a one-cylinder, 2 cycle, air-cooled, power source that
develops 7.3 horsepower at 4250 rpm. A centrifugal clutch drives the combustion
air fan, the water pump, and the heater fuel pump.
The clutch begins to drive the fan,
water pump, and fuel pump when the engine speed exceeds 2700 rpm. A diaphragm
fuel pump operates on pulsating crankcase pressure to supply fuel to the engine
carburetor.
b.
The engine has a built-in generator. The generator supplies 6 V-ac at
17 watts to power the electronic control system. A manual recoil starter is
used to start the engine.
1 - 9. AIR SYSTEM PRINCIPLES OF OPERATION.
The air system consists of the axial vane fan enclosed in a shroud.
When the
centrifugal clutch engages, the fan assists in drawing air from around the
engine cooling fins to cool the engine and provide preheated air to the heat
exchanger.
In the heat exchanger, the air is used for combustion which in
turn heats the water in the heating coil.
1-10.
WATER SYSTEM PRINCIPLES OF OPERATION.
The water system consists of an over-capacity, roller-type pump that is belt
driven by the engine through the centrifugal clutch.
The pump can provide
varying flow rates at the water outlet and is controlled by a pressure regula-
tor valve on the control panel.
The water pressure regulator valve will allow
any over supply of water to be returned to the inlet side of the pump.
1-3
