Engine Adjustment - Briggs & Stratton Home Generator Systems Installation And Startup Manual

For a 15kW Home Generator System:
4. Remove cap from LP inlet on T-valve.
5. Remove fuel line from NG inlet.
6. Place cap from LP inlet onto NG inlet.
7. From oil fill access area, pull fuel line out of top hole
and route it through bottom hole.
IMPORTANT: Failure to route fuel line through bottom hole
may cause the fuel line to kink. When tightening fuel hose
fittings make certain the fuel hose does not twist or kink.
If the fuel line kinks, the generator may start but will not
operate properly.
8. Connect fuel line (B) to LP inlet (C).
B
9. Reinstall 15 Amp fuse in control panel.
10. Set generator's system switch to AUTO.
11. Close control panel and oil fill access doors.
The system is now ready to operate automatically using LP
fuel.
Initial Start-up (No Load)
Before operating the home 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 home 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.
16
NOTE: If either parameter is outside these ranges, perform
the Engine Adjustments described below.
C
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.

Engine Adjustment

There are regional variances in the composition of natural
gas. Each home generator unit leaves the factory set for
NG operation. If the generator output voltage or frequency
measured during Initial Start-Up (paragraph #9) is outside
the listed ranges, the combustibility of the gas supplied at
the installation site may be substantially different from the
fuel used at the factory.
To adjust the engine for this difference, proceed as follows.
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.
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.
1. Open the oil drain and control panel access doors.
2. Remove the four screws that hold the circuit breaker
cover to the air intake guard.
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