18
Briggs & Stratton Power Products Standby Generator
Installation, Start-Up and Owner’s Manual
8. Set AUTO/OFF/MANUAL switch to AUTO.
9. Reset exercise timer following instructions “Setting
Exercise Timer” on page 19.
The generator 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)
Begin testing the generator without any electrical loads
connected, as follows:
1. Set AUTO/OFF/MANUAL switch to OFF.
2. Set generator’s main circuit breaker to OFF (open)
position.
3. Install 15 Amp fuse in control panel.
4. Set AUTO/OFF/MANUAL switch to MANUAL.
NOTE:When the Standby 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 15 seconds per
minute to reduce heat in starter.
6. Repeat process until engine starts.
7. Listen for unusual noises, vibration or other indications
of abnormal operation. Check for oil leaks while the
engine runs.
8. Let engine warm up for about five minutes to allow
internal temperatures to stabilize.Then, set generators
main circuit breaker to ON (or closed) position.
9. Connect an accurate AC voltmeter and a frequency
meter to check generator output at load side of circuit
breaker.Voltage should be 230-240Volts,frequency
should be 62.0 - 62.5 Hz.
10. Check generator output between one
emergency/generator connection lug and neutral lug,
then between other emergency/generator connection
lug and neutral lug. In both cases,voltage reading
should be between 115-120Volts.
11. Set AUTO/OFF/MANUAL switch to OFF. Engine will
shut down.
AUTOMATIC OPERATIONSEQUENCE
The generator’s control panel houses a logic control circuit
board.This control board constantly monitors utility power
source voltage.Should that voltage drop below a preset
level,control board action will signal the engine to crank
and start.
When utility source voltage is restored above a preset
voltage level,the engine is signaled to shut down.
The actual system operation is not adjustable and is
sequenced by sensors and timers on the control board,as
follows:
Utility Voltage Dropout Sensor
• This sensor monitors utility source voltage.
• If utility source voltage drops below 70 percent of the
nominal supply voltage,the sensor energizes a six second
timer.
• Once the timer has expired,the generator will start.
Utility Voltage Pickup Sensor
This sensor monitors utility power supply voltage.When
that voltage is restored above 70 percent of the nominal
source voltage,a time delay starts timing and the generator
will go to engine cool-down.
Engine Cool-down Timer
• When the load is transferred back to the utility power
source, the engine cool-down timer starts timing.
• The timer will run for about one minute,then the
generator will stop.
• Minimum generator run time is five minutes.