TM 9-4940-556-14&P
3.10 DESCRIPTION OF OPERATION AND COMPONENTS - SOLUTION SYSTEM
3.10.1 Cleaning solution is drawn from the stainless steel solution
tank through the panel mounted solution valve, then into the right
hand water pump body, through a ball check valve. This check valve
prevents water from being pumped back into the solution tank.
3.11 DESCRIPTION OF OPERATION AND COMPONENTS - FUEL SYSTEM- REF.DRAWING JP7225
3.11.1 Number 1 or 2 diesel fuel, is placed in the fuel tank. Fuel
is drawn out of tank thru a fuel filter by the fuel pump. The fuel
filter holder is equipped with a shut-off valve. The dual pressure,
shaft driven pump has a adjustable by-pass which diverts part of its
output back to the top of the fuel tank. Its high and low pressure
output is selected by the MODE SWITCH.
3.11.2 The main discharge line from the fuel pump goes through a fuel
solenoid valve (SV-1) to the burner. This solenoid will SHUT-OFF fuel
to the burner when cleaning gun is closed. Fuel solenoid is activated
by a pressure switch which is connected to the water system at the
coil inlet.
3.11.3 The burner is equipped with a 90 degree fuel jet and strainer
assembly. The fuel jet size along with fuel pump output pressure
determines how much fuel is burned and the strainer minimizes jet clogging
due to dirt in the fuel.
3.12 DESCRIPTION OF OPERATION AND COMPONENTS - AIR SYSTEM
3.12.1 The squirrel cage fan is mounted on one end of a belt driven
jack shaft and draws air into unit. The blower is equipped with an
adjustable baffle to regulate the air supply if necessary.
3.12.2 Air is blown into a chamber under the coil casing and is forced
thru the air whirler and through the burner assembly. The oxygen in
the air supports the combustion of the oil and carries hot gasses through
the heating coil thus transferring heat energy to the water passing
through the coil.
3.12.2 A pressure switch (PS-3) will interrupt the flow of fuel to
the burner if the fan would fail.
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