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d)
Generate electrical power from the temperature difference created across ther-
moelectric materials housed within the power unit
e)
Make the electrical power available to the load
The main parts of the model 5220 TEG, with optional Limiter/Converter (L/C) attached,
are shown in Figure 2.
4.1.1 Fuel System
Components making up
the fuel system control
the input of fuel to the
burner. The primary con-
trol is a pressure regulator
that modulates fuel mani-
fold pressure to a meter-
ing orifice. The pressure
regulator includes a sedi-
ment bowl with a manual
drain cock and fuel filter
to remove fuel impurities.
The fuel filter has a resin
impregnated
element which prevents
solid particles from dam-
aging the regulator and
downstream parts.
The outlet of the pressure regulator leads to a manifold on which is mounted a pres-
sure gauge to monitor the fuel pressure, and a pressure switch for the SI module . The
fuel flows through the manifold to the fuel line which connects to a orifice mounted on
the front of the burner. The orifice contains a jewel with a precisely sized hole to meter
the fuel flow into the burner. A solenoid valve (SV) is located beneath the cabinet and
plumbed between the manifold and fuel line.
The solenoid valve is controlled by the Ignition Control System. The Ignition Control
System opens the solenoid valve when the fuel pressure switch is Closed (fuel pressure
is present), and closes the solenoid valve when fuel pressure switch is open (no fuel
pressure) or the Ignition Control System does not detect combustion. The main parts of
fuel system are shown in Figure 3.
Gentherm Global Power Technologies
5220
cellulose
Figure 3 5220 Fuel System General Assembly
28142 Rev. 14
4-2
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