Gentherm 5220 Operating Manual page 64

28142 Rev 15
Fuel Orifice Inspection
Follow these steps to inspect the fuel orifice:
Shut off the fuel supply to the TEG and allow to cool.
Remove the air screen by undoing the 4 mounting screws.
Disconnect the fuel line from the solenoid valve.
Disconnect the other end of the flexible fuel line from the orifice fitting.
Unthread the orifice fitting from the venturi.
Visually check the orifice hole. It should be clean and free of obstructions. Replace it
if necessary. A magnifying glass is recommended to aid in visual inspection.
Replace the orifice by threading it back into the venturi until it is finger tight.
Connect the fuel line to orifice fitting and to the solenoid valve.
Leak-check all connections using a commercial leak detector.
Solenoid Valve Replacement
Should the solenoid valve fail (see troubleshooting procedure) and require replacement,
follow these steps to replace the old valve with a new one:
Shut the TEG down.
Remove the connector from the valve coil. Remove the wires from the insert by
pulling them out the back. If your TEG is equipped with a valve having the same
style DIN connector, do not replace the harness.
Disconnect the fuel lines from both sides of the valve using a 9/16" wrench.
Remove the 4 screws holding the valve body to the bracket.
Remove the elbow fittings from the old valve. Clean the threads and set aside
Remove the connector at the other end of the valve wiring harness from the
small interconnect board inside the electrical enclosure. Loosen the cord grip
that the harness passes through and pull the cable back through it. You may
need to cut off the interconnect board connector to fully remove the wire.
Discard the old wiring harness.
Gentherm Global Power Technologies
Always use the same size orifice as what was
removed.
CAUTION!
Propane orifice (#10) - Part# 06251
Natural gas orifice (#8) - Part# 00690
Check for fuel leaks after any fuel system service
WARNING!
using a commercial leak detector fluid such as
Snoop .
®
MAINTENANCE
Page 58