PROCESS DESCRIPTION
Gentherm Global Power Technologies
Page 12
4.1.1
Fuel System
Components making up the fuel system control the input of fuel to the burner. The primary
control is a pressure regulator that modulates fuel manifold pressure to a metering orifice.
The pressure regulator includes a sediment bowl with a manual drain cock and fuel filter to
remove fuel impurities. The fuel filter has a resin impregnated cellulose element which
prevents solid particles from damaging the regulator and downstream parts.
Figure 4
–
P-5100 Fuel System General Assembly
The outlet of the pressure regulator leads to a manifold on which is mounted a pressure
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 an 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 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.
An optional NACE compliant stainless-steel fuel system is available as an option.
