Kohler 14RESA Manual page 113

6.11 Fuel Systems
WARNING
Risk of fire.
Can cause severe injury or death.
Do not smoke or permit flames or
sparks near fuels or the fuel system.
WARNING
Explosive fuel vapors.
Can cause severe injury or death.
Use extreme care when handling,
storing, and using fuels.
The fuel system. Explosive fuel vapors can cause severe
injury or death. Vaporized fuels are highly explosive. Use
extreme care when handling and storing fuels. Store fuels in a
well-ventilated area away from spark-producing equipment
and out of the reach of children. Never add fuel to the tank
while the engine is running because spilled fuel may ignite on
contact with hot parts or from sparks. Do not smoke or permit
flames or sparks to occur near sources of spilled fuel or fuel
vapors. Keep the fuel lines and connections tight and in good
condition. Do not replace flexible fuel lines with rigid lines. Use
flexible sections to avoid fuel line breakage caused by
vibration. Do not operate the generator set in the presence of
fuel leaks, fuel accumulation, or sparks. Repair fuel systems
before resuming generator set operation.
Gas fuel leaks. Explosive fuel vapors can cause severe
injury or death. Fuel leakage can cause an explosion. Check
the LPG vapor or natural gas fuel system for leakage by using
a soap and water solution with the fuel system test pressurized
to 6--8 ounces per square inch (10--14 inches water column).
Do not use a soap solution containing either ammonia or
chlorine because both prevent bubble formation. A successful
test depends on the ability of the solution to bubble.
The fuel supplier provides and maintains manual
shut-off valves and the primary regulator. See the
generator set installation manual for fuel pipe size
recommendations. Verify that the fuel system capacity
is adequate to supply the generator set plus all other gas
appliances.
A factory-installed secondary regulator and 12 VDC
solenoid valve are located in the front air intake
compartment. See Figure 6-26.
TP-6805 8/15
The controller energizes the fuel solenoid valve to open
at startup and deenergizes the valve to close at
shutdown. The secondary fuel regulator reduces fuel
pressure for delivery to the fuel block. The fuel flows
from the fuel block to the carburetor in a gaseous state.
The carburetor mixes the fuel with intake air for
consumption by the engine.
Refer to the troubleshooting instructions in Section 5,
Troubleshooting, to identify generator set operation
problems that may be caused by an inadequate fuel
supply, incorrect adjustments, or damaged fuel system
components. Then use the instructions in this section to
check fuel system components.
6.11.1 Fuel Solenoid Valve
A solenoid valve upstream of the regulator and the
flexible fuel connector provides automatic fuel on/off
control. See Figure 6-26. The engine starting battery
powers the solenoid valve and the engine starting
controls open the valve when the engine cranks or runs.
Fuel Valve Operation Test Procedure
1. Disconnect the positive (+) battery lead from the
gas valve terminal.
2. Apply 12 VDC to the gas valve terminal and listen
for an audible click, indicating that the valve
actuates.
3. Replace the gas valve if it does not actuate in
step 2.
6.11.2 Ignition Timing
The digital spark advance ignition (DSAI) optimizes the
14 kW generator engine timing for the selected fuel,
natural gas or LPG. The ignition timing leads are located
near the fuel solenoid valve. See Figure 6-26. Connect
the ignition timing leads together for natural gas fuel.
Disconnect the leads if LPG is used. See Figure 6-25.
Note: The ignition timing leads have no effect on 20 kW
models.
See the engine service manual for ignition system
service information.
Ignition Timing Lead Connection
Natural Gas
LPG
Figure 6-25 Ignition Timing Lead Connection
Section 6 Component Testing and Adjustment
Connect
Disconnect
113