Fuel System Selection; Initial Start-Up (No Load) - Generac GEN10AD Manuel D'installation

Fuel Supply System
Ensure that all fuel pipe connections are tight, secure and
without leaks.
Ensure that all gas line shutoff valves are OPEN and that
adequate fuel pressure is available whenever automatic
operation is desired.

Fuel System Selection

The engine of your Residential generator System is factory
calibrated to run on natural gas (NG). It may also be
operated on liquefied petroleum (LP) vapor. There is no
additional hardware/equipment required to switch between
either fuel. However, LP fuel inlet pressure must be between
11 and 14 inches water column.
To configure the fuel system for LP use:
1. Remove control panel and oil fill access covers.
2. Set generator's system switch to OFF.
3. Remove 15 Amp fuse from control panel.
4. Connect the fuel select solenoid by joining the two-pin
electrical connector (A).
A
5. Reinstall 15 Amp fuse in control panel.
6. Set generator's system switch to AUTO.
7. Install control panel and oil fill access covers.
The system is now ready to operate automatically using LP
fuel. With a fixed main jet for LP gas, there is no need to
perform any engine adjustments for LP operation.

Initial Start-up (No Load)

Before operating the residential generator or placing it into
service, inspect the entire installation carefully.
Then begin testing the system without any electrical loads
connected, as follows:
1. Set generator's main circuit breaker to its ON
(closed) position.
2. Install 15 Amp fuse in control panel.
3. Set generator's system switch to AUTO.
4. Push MANUAL OVER-RIDE button on control panel.
NOTE: When the residential generator is started for the very
first time, it will require that air in the gaseous fuel lines be
purged. This may take a few minutes.
5. DO NOT crank engine for more than 10 seconds, then
pause for 10 seconds to reduce heat in the starter.
6. Repeat process until engine starts.
7. Listen for unusual noises, vibration or other indications
of abnormal operation. Check for oil leaks while
engine runs.
8. Let engine warm up for about five minutes to allow
internal temperatures to stabilize.
9. Connect an accurate AC voltmeter and a frequency
meter to check generator output at load side of circuit
breaker. Voltage should be 239-262 Volts, frequency
should be 62.0 - 62.5 Hz.
NOTE: If either parameter is outside these ranges, perform
the Engine Adjustments described below.
10. Check generator output between one of the generator
connection lugs and the neutral lug, then between the
other generator connection lug and the neutral lug.
In both cases, voltage reading should be between
119-131 Volts.
11. Push and hold MANUAL OVER-RIDE button on
control panel again until engine stops.
IMPORTANT: DO NOT proceed until you are certain that
generator AC voltage and frequency are correct and within
the stated limits. To obtain the proper generator frequency,
see Engine Adjustments.
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