Stopping The System; Generator Load Tests - Briggs & Stratton 1938 Operator's Manual

Service &
Troubleshooting Guide - Home Generator Systems __& Sf_a, _
Model 1938 (I OkW) General Information _ _'_
Checking Automatic Operation
To check the system for proper automatic operation,
proceed as follows:
• Check that AUTO/OFF/MANUAL is set to OFF.
• Apply utility power to the UTILITY CONNECTION
lugs of the Automatic Transfer Switch by turning ON
the main distribution panel circuit breaker.
• Set the AUTO/OFF/MANUAL switch to AUTO. The
Automatic Power System is now ready for automatic
operation.
• Turn OFF the main distribution panel circuit breaker
that sends utility power to the automatic transfer
switch.
The engine will crank and start once the utility voltage drops
out and the sensor has timed out. After starting, the transfer
switch will transfer the circuit loads to the generator. Let
the system go through its entire automatic operation
sequence.
• With the generator output supplying its loads, turn ON
the main distribution panel circuit breaker that supplies
utility power to the transfer switch.
• After about 5 minutes of run-time, the automatic
transfer switch will transfer loads back to the utility
power.
• About one minute after re-transfer, the engine will shut
down.
This completes the test procedures for automatic operation.
The Home Generator System will now start automatically
when utility power is lost and will supply power to the
protected circuits in the home.
Stopping the System
To disable the power transfer system for maintenance:
• Ensure that utility power is ON and is supplied to the
UTILITY CONNECTION lugs of the transfer switch.
• Set the AUTO/OFF/MANUAL switch to OFF.
• Set the generator's main circuit breaker to its OFF
position.
Generator Load Tests
To test the generator with electrical loads applied, proceed
as follows:
• Set the generator's main circuit breaker to OFF.
• Set the AUTO/OFF/MANUAL switch to OFF.
• Turn OFF the main circuit breaker, which supplies
utility power to the UTILITY CONNECTION lugs of
the Automatic Transfer Switch.
• Set AUTO/OFF/MANUAL switch to AUTO.
Engine should crank and start immediately.
• Let the engine stabilize and warm up for a few minutes.
• Set the generator's main circuit breaker to ON.
(Generator power is now supplied to the
GENERATOR CONNECTION lugs of the transfer
switch).
• Turn ON electrical loads. Apply the full rated output of
the selected circuits to the generator system.
• Use an accurate AC voltmeter to check generator
output voltage across the primary load lugs that supply
power to the protected circuits. Voltage should be
equal to or greater than 216VAC.
• Connect an accurate AC frequency meter across the
primary load lugs of the protected circuits. Frequency
should be 57-62.5 Hz.
• Let the Home Generator System run loaded for 20-30
minutes. Listen for unusual noises, check for excessive
vibration or other indications of abnormal operation.
Check for oil leaks, evidence of overheating etc.
• Turn the Main Distribution Circuit Breaker ON
(This supplies utility power to the UTILITY
CONNECTION lugs of the transfer switch).
The transfer switch should transfer back to utility, the
generator will cool down for I minute and then shut down.
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