Auto Dual Fuel Changeover Connections - Kohler 48RCLC Installation Manual

3.4 Auto Dual Fuel Changeover Connections

Some applications use natural gas as the primary fuel and LP gas as the emergency fuel when natural gas is not available. The
optional automatic changeover dual fuel system allows the system to switch to LP fuel automatically if the natural gas supply is
not available.
The dual fuel natural gas and LP gas system contains a separate secondary gas regulator and dual solenoid valve for each fuel.
A pressure switch on the primary fuel source closes when fuel pressure drops, which energizes a relay that closes the primary
fuel solenoid and opens the secondary or emergency fuel solenoid.
The dual fuel reset box includes:
•
An indicator light that turns on when the system is using LP fuel.
•
A reset switch that allows manual return to natural gas, if available.
Once on LP, the fuel system will switch back to natural gas when:
•
The LP fuel supply runs out; or
•
The generator set stops and restarts; or
•
The reset switch on the dual fuel box is used.
Procedure to Reset to Natural Gas
To reset the fuel to natural gas using the reset box, turn the reset switch clockwise and hold it briefly until the changeover occurs.
The indicator light turns off when the system has changed back to natural gas.
Figure 22 Dual Fuel Reset Box
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