Kohler 12RES Installation Manual page 18

Fuel Selection, Revised Fuel System
1. Place the generator set master switch in the
OFF/RESET position.
2. Disconnect the utility power to the generator.
3. Disconnect the generator set engine starting
battery, negative (- ) lead first.
4. Turn off and disconnect the fuel supply.
5. To change the fuel selection:
a. For natural gas (NG), turn the selection knob all
the way clockwise. The knob lines up with the
UP arrow on the regulator body as shown in
Figure 1-14.
Figure 1-14 Knob Position, NG
b. For LPG, turn
counterclockwise as far as it will go,
approximately ¼ turn. See Figure 1-15.
Figure 1-15 Knob Position, LPG
18 Section 1 Installation
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the selection knob
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6. The ignition timing leads 65 and N, located near the
regulator. See Figure 1-16.
a. For natural gas (NG), connect lead 65 to lead N.
b. For LPG, disconnect lead 65 from lead N.
7. Connect and turn on the fuel supply (Ensure that
the fuel supply matches the fuel setting).
8. Reconnect the generator set engine starting
battery leads, negative (- ) lead last.
9. Reconnect the utility power to the generator.
10. Change the fuel type setting on the RDC2
controller in the Genset System menu. See the
Operation Manual for instructions to change
settings on the controller.
11. Start the generator set by moving the master
switch to the RUN position.
12. Check for leaks using a gas leak detector.
13. Run the generator set and check the operation.
14. Move the generator set master switch to the
OFF/RESET position to shut down the generator
set.
Figure 1-16 Ignition Timing Leads
A pressure port is provided on the fuel regulator. See
Figure 1-13. Follow these steps to check the fuel
pressure at the regulator, if necessary.
1. Remove the plug from the fuel pressure port.
2. Connect a manometer capable of measuring low
pressures (3- 11 inches water column) to the
pressure port.
3. When finished, replace the plug in the pressure
port and check for leaks.
TP-6967 2/21