TP-6735 7/1782 Section 5 Component Testing and Adjustment
5.11.5 Fuel Conversion, 14RES/RESL
Two fuel connections on the fuel block allow field-
conversion between natural gas and LP vapor. The fuel
metering valves are factory-set and sealed to comply
with applicable emission standards and to provide the
best possible hot and cold starting.
Note: Do not adjust the factory-sealed fuel-metering
adjustments on the fuel block. Changing the fuel-
metering adjustments may violate federal or
state laws.
Use the following procedure to convert from natural gas
(NG) to LP vapor, moving the fuel connection from the
natural gas to the LP port, plugging the natural gas port,
and disconnecting the leads for the digital spark
advance ignition (DSAI). See Figure 5-27 for the fuel
system component locations.
Procedure to convert from NG to LP, 14RES/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 in the fuel block. See Figure 5-32.
5
GM66563
1. Fuel block
2. Fuel metering valves—factory-sealed, do not adjust
3. Fuel inlet, 1/2 in. NPT
4. Hose fitting
5. Plug
1
2
3
4
Natural gas
setup shown
Figure 5-32 Fuel Block, 14RES/RESL
6. Remove the hose fitting from the natural gas outlet
port in the fuel block. See Figure 5-32.
7. Remove the plug from the LP port in the fuel block.
See Figure 5-32.
8. Clean the plug with a dry cloth or brush, apply fresh
pipe sealant, and install the plug into the natural
gas outlet port.
9. Clean the hose fitting with a dry cloth or brush,
apply fresh pipe sealant to the threads, and install
the fitting into the LP port.
Note: Do not adjust the fuel metering valves.
10. Slide the hose onto the hose fitting and secure it
with the clamp.
11. Disconnect the DSAI leads for LP. See Figure 5-27
for the location of the DSAI leads.
Fuel DSAI Leads 65 and N
Natural Gas Connect lead 65 to N
LP Disconnect
Figure 5-33 DSAI Connection
12. Connect and turn on the new fuel supply.
13. Check that the generator set is off. Check that the
OFF LED on the controller is flashing.
14. Reconnect the generator set engine starting
battery leads, negative (--) lead last.
15. Reinstall controller fuse F3.
16. Reconnect power to the battery charger.
17. Start the generator set by pressing the RUN button
on the generator set controller.
18. Check for leaks using a gas leak detector.
19. Run the generator set and check the operation.
Use the controller to adjust the output and stability
if necessary.
20. Press the OFF button to to shut down the generator
set.
To convert from LP vapor to natural gas, follow the same
fuel conversion procedure, moving the hose fitting to the
natural gas port and plugging the LP port. Connect the
DSAI leads for natural gas. See Figure 5-33.
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