TP-6329 8/07 29Section 3 Installation Instructions
4. Check that the fuel system is set up for the fuel
being used (natural gas or LP).
a. Check the orientation of the fuel regulator and
check the hang tag attached to the regulator.
The fuel regulator is installed pointing up for
natural gas and down for LP gas. See
Figure 3-10.
b. Use the following procedure to convert the fuel
system, if necessary.
1
1. Fuel system
Figure 3-9 Generator Set Fuel System Location
(enclosed unit shown)
1. Solenoid valve
2. Secondary regulator (shown pointing down for LP)
3. Fuel supply connection
Note: UL 2200 listed units include a second fuel valve.
1
GM39123
2
3
Figure 3-10 Fuel System (LP gas setup shown)
3.8.1 Fuel Conversion Procedures
When converting the generator set to operate with LP
gas, remove the internal spring from the secondary
regulator and rotate the regulator to point down. To
operate the generator set on natural gas, install the
spring and rotate the regulator to point up.
LP Fuel Conversion Procedure
Use the following steps to set the fuel system for LP gas:
1. Remove the fuel regulator cover plug. See
Figure 3-11.
SB-527
1. Fuel regulator
2. Spring
3. Adjustment screw
4. Cover plug
1
2
34
Figure 3-11 Fuel Regulator, Typical
2. Remove the adjustment screw and spring from the
fuel regulator. Save the adjustment screw and
spring for possible conversion back to natural gas.
3. Reinstall the cover plug.
4. Rotate the regulator to point down as shown in
Figure 3-10.
5. Disconnect leads 65 and 70A at the quick connects
in the wiring harness.
6. Connect a manometer to check the fuel supply
pressure on the carburetor side of the regulator.
7. Adjust the fuel supply pressure with the generator
set running at full load. Rotate the adjustment
screw on the primary fuel regulator until the
manometer indicates a fuel pressure of 7--11
inches water column. Pressures below 7 inches
water column may result in poor response to load
changes or lack of power.
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