Initial Start-Up(No Load); Electrical Checks - Briggs & Stratton 1768-0 Installation Manual

Brigss & Stratton Power Products Home Generator System
Installation Manual
INITIAL START-UP
(NO LOAD) 4.
Begin testing the system without anyelectrical loads
connected, as follows:
I. Set theAUTO/OFF/MANUAL switch to OFF. S.
2, Set the generator's main circuit breaker to its OFF
(open) position.
3. Install the 15 Amp fuse in the control panel. 6.
4, Set the AUTO/OFF/MANUAL switch to MANUAL.
7.
NOTE:When the Home Generator System 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. Use short sorting cycles (I 5 sec. per min.) to reduce
heat in the starter.
6. Repeat process until lines are purged of air and engine
starts.
7. Listen for unusual noises,vibration or other indications
of abnormal operation, Check for oil leaks,evidence of
overheating etc. while the unit runs. 8.
Electrical Checks
With the AUTO/OFF/MANUAL switch set to OFF:
h Turn ON the main distribution panel circuit breaker
that supplies utility power to the Automatic Transfer
Switch.
_1 WARNI NG! The Automatic Transfer Switch is
now electrically "HOT." Contact with "HOT" parts
will result in extremely hazardous and possibly fatal
electrical shock. Proceed with caution,
2.
3.
Use an accurate AC voltmeter to check utility power
voltage across "UTILITY CONNECTION" lugs in the
Automatic Transfer Switch (see Interconnection
Diagram on page 12). Nominal line-to-line voltage
should be 240Volts.
Check utility power between one of the UTILITY
CONNECTION lugs and the neutral lug, then between
the other UTILITY CONNECTION lugs and the
neutral lug. Nominal line-to-neutral voltage should be
120 Volts.
When certain that utility voltageis as specified above,
turn OFF the main distribution panel circuit breaker
that supplies utility power to the Automatic Transfer
Switch.
Set the generator'smain circuit breaker to the OFF
position. Initialtests will be conducted at "no-load"
condition.
Set the AUTO/OFF/MANUAL switch to MANUAL.
The engine should crank and start_
Let the engine warm up for about five minutes to allow
internaltemperatures to stabilize.Then, set the
generator's main circuit breaker to its ON (or closed)
position,
_ WARNING!
Proceed with caution. Generator
output voltage is now supplied to the Automatic
Transfer Switch. Contact with "HOT" Automatic
Transfer Switch parts will result in dangerous and
possibly fatal electrical shock.
Connect an accurate AC voltmeter and a frequency
meter to check generator output across
"GENERATOR CONNECTION" lugs in theAutomatic
Transfer Switch (see Interconnection Diagram on
page 12).Voltage should be 239-250 Volts, frequency
should be 62.0 - 62.5 H_
NOTE: If either parameter is outside these ranges,
perform the EngineAdjustments described on page 18.
9.
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 121-126Volts.
I0. Set the generator's main circuit breaker to OFF. Let
the engine run at"no-load" for a few minutes to
stabilize internal engine/generator temperatures.
I h Set the AUTO/OFF/MANUAL switch to OFF. Engine
should stop.
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 on page 18.
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