Kohler KG40 Operation page 94

KG80–KG125, KG80R–KG125R Dual Fuel Operation
The dual fuel system for the KG80–KG125 and KG80R–KG125R includes an LPG indicator light and a reset switch. This LPG
indicator light turns on when the NG fuel valve closes and the LP fuel valve opens, indicating that the fuel source has switched.
The reset switch resets the fuel source to natural gas. See the operation summary below.
When NG fuel is lost or insufficient

NG fuel valve closes.

LP fuel valve opens.

Indicator light turns on indicating the unit is running on LPG vapor.

Low fuel pressure warning activates (due to loss of primary fuel supply).
The unit will return to NG fuel if:

The reset switch is activated (separate box with a switch and light).
Note:
The reset switch can be activated while the unit is running.

LP fuel supply is lost or insufficient.
Note:
If NG fuel supply has still not returned, the unit will shut down due to not having an available fuel source.

The generator set is shut down and restarted.
o
Utility returns.
o
Off button is manually pressed.
o
E-Stop is pressed.
Controller
Figure 41 Dual Fuel System, KG80–KG125/KG80R–KG125R
94
LPG indicator light
Reset switch
LP fuel valve
NG fuel valve
UL required fuel shutoff valve
Low fuel
pressure
switches
Low fuel pressure
alarm switch
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