TP-6803 12/1120 Section 1 Installation
1.7.2 Fuel Conversion, 20RESA/RESAL
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 1-15 for
the fuel system component locations.
Procedure to Convert from NG to LP,
20RESA/RESAL
1. Press the OFF button on the generator set
controller.
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 1-15.
6. Insert the orifice into the hose fitting. See
Figure 1-15.
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. The DSAI leads are located
near the fuel solenoid valve. See Figure 1-11.
9. Connect and turn on the new fuel supply.
10. Reconnect the generator set engine starting
battery leads, negative (--) lead last.
11. Reconnect power to the battery charger.
12. Start the generator set by pressing the RUN button
on the generator set controller.
13. Check for leaks using a gas leak detector.
14. Run the generator set and check the operation.
15. Press the OFF button to shut down the generator
set.
Conversion from LP to Natural Gas
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 1-14 DSAI Connections
Rating
Converting the fuel will change the generator set rating.
See the generator set specification sheet for ratings with
natural gas and LP. Order a new nameplate with the
updated rating and fuel information from an authorized
distributor/dealer, if necessary. Provide the following
information from the original nameplate:
D Model Number D kVA
D Spec Number D Amps
D Serial Number D Volts
D Fuel (original and new) D Hz
D kW
1. LP orifice
2. Hose fitting
3. Regulator
4. Fuel inlet, 1/2 in. NPT female
GM84143
4
3
1
Note: LP setup
shown
2
Figure 1-15 Fuel Regulator and LP Orifice,
20RESA/RESAL
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