Initial Start-Up (No Load); Engine Adjustment - Briggs & Stratton Home Generator System Installation & Start-Up Manual

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:
Unit has been set-up for NG operation at the factory.
Fuel conversion, if needed, must be completed prior to
performing these steps. See Fuel Conversion later in
this section.
1. Remove four screws that hold circuit breaker cover to
air intake guard.
2. Connect an accurate AC voltmeter and a frequency
meter to line side of generator's circuit breaker.
3. Set generator's main circuit breaker to ON
(closed) position.
4. Install 15 Amp fuse in control panel.
5. Set generator's system switch to AUTO.
6. Push and hold MANUAL OVER-RIDE button on control
panel for about six seconds. Engine will start.
When the 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.
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. Check generator output at load side of circuit breaker.
Voltage should be 239-262 Volts, frequency should be
62.0 - 62.5 Hz.
If either parameter is outside these ranges, perform Engine
Adjustment described later in this section.
16
10. Check generator output between one generator
connection lug and neutral lug, then between other
generator connection lug and neutral lug. In both cases,
voltage reading should be between 119-131 Volts.
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.
11. Push and hold MANUAL OVER-RIDE button on control
panel again until engine stops.
12. Install circuit breaker enclosure cover.

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 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.
1. Remove four screws that hold circuit breaker cover to
air intake guard.
2. Connect an accurate frequency meter to line side of
generator's main circuit breaker.
3. Ensure that the 15 Amp fuse is installed.
4. Set the generator's main circuit breaker ON.
5. Set the generator's system switch to AUTO.
6. Push MANUAL OVER-RIDE button on control panel.
When the engine starts, allow it to warm up for
five minutes.
7A. For a 12kW generator, normal no load frequency
is 62.0 to 62.5 Hz. If adjustment is needed at no
load, slowly rotate the governor adjustment nut (A)
clockwise and/or counterclockwise until frequency is
62.0 to 62.5 Hz.
A
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