Kohler 20RES - Page 81

TP-6735 7/17 81Section 5 Component Testing and Adjustment
5.11.4 Fuel Conversion, 20RES/RESL
For LP vapor fuel, an orifice is used in the fuel line. The
unit is typically shipped set up for natural gas, with the
loose orifice tied near the fuel solenoid valve. To convert
to LP vapor, install the orifice and disconnect the spark
advance leads as described below. See Figure 5-27 for
the fuel system component locations.
1. LP orifice
2. Hose fitting
3. Regulator
4. Fuel inlet, 1/2 in. NPT female
5. Vent hose
2
GM66563
4
5
3
1
LP setup
shown
Figure 5-30 Fuel Regulator and LP Orifice,
20RES/RESL
Procedure to Convert from NG to LP, 20RES/RESL
1. Press the OFF button on the generator set
controller and remove controller fuse F3.
2. Disconnect the power to the battery charger.
3. Disconnect the generator set engine starting
battery, negative (--) lead first.
4. Turn off the fuel supply.
5. Remove the hose clamp and fuel hose from the
hose fitting. See Figure 5-30.
6. Insert the orifice into the hose fitting. See
Figure 5-30.
7. Slide the hose onto the hose fitting and secure it
with the clamp.
8. Disconnect digital spark-advance module (DSAI)
leads 65 and N5 for LP. See Figure 5-33 and
Figure 5-31.
9. Connect and turn on the new fuel supply.
10. Reconnect the generator set engine starting
battery leads, negative (--) lead last.
11. Reinstall controller fuse F3.
12. Reconnect power to the battery charger.
13. Start the generator set by pressing the RUN button
on the generator set controller.
14. Check for leaks using a gas leak detector.
15. Run the generator set and check the operation.
Use the controller to adjust the output and stability
if necessary.
16. Press the OFF button to shut down the generator
set.
To convert from LP vapor to natural gas, remove the fuel
orifice and connect the DSAI leads together.
Fuel DSAI Leads 65 and N
Natural Gas Connect lead 65 to N
LP Disconnect
Figure 5-31 DSAI Connections