Transfer Back To Utility Power Source; Automatic Transfer Operation - Generac Power Systems PowerPact 7.5 kW Owner's Manual

Operation
5. To crank and start the engine, press the control
panel MANUAL button.
6. Allow the engine to stabilize and warm up for a few
minutes.
7. Set the main
Disconnect) to ON or CLOSED. The standby
power source now powers the loads.
IMPORTANT NOTE: Actual switch operation may vary. Follow directions in the appropriate transfer switch manual.
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MANUAL
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AUTO
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EXERCISE •

Transfer Back to Utility Power Source

When utility power has been restored, transfer back to
utility source and shut down the generator. To manually
transfer back to utility power and shut down the
generator:
1. Set the Main
Disconnect) to OFF or OPEN.
2. Allow the engine to run for 2 minutes at no-load to
stabilize the internal temperatures.
3. Press the control panel OFF button. The engine
should shut down.
4. Verify that utility power supply to the transfer switch
is turned off.
5. Use the manual transfer handle inside the transfer
switch to move the main contacts back to the
UTILITY position (loads connected to the utility
power source, A in
6. Turn on the utility power supply to the transfer
switch using the means provided.
7. Press the control panel AUTO button.
12
circuit breaker (Generator
Will not transfer to generator if utility is present.
Will transfer to generator if utility fails (below 65% of nominal for 10 consecutive seconds).
Will transfer back when utility returns for 15 consecutive seconds. The engine will continue to
run until removed from the MANUAL mode.
Will start and run if utility fails (below 65% of nominal for 5 consecutive seconds).
Will start a 6 second engine warm-up timer (or 30 seconds; refer to
–
Will not transfer if utility subsequently returns.
–
Will transfer to generator if utility is not present.
Will transfer back to utility once utility returns (above 80% of nominal) for 15 seconds.
Will not transfer back to utility unless utility returns. The generator will shut down if the OFF
button is pressed or a shutdown alarm is present.
Once utility power is returned, the generator will shut down after 1 minute cool-down time.
Will not exercise if generator is already running in either AUTO or MANUAL mode.
During exercise, the control panel will only transfer if utility fails during exercise for 6 seconds
Cold Smart Start
(or 30 seconds; refer to
Circuit Breaker (Generator
Figure 3-4).
A
Figure 3-4. Manual Transfer Switch Operation
) and will operate as normal in AUTO mode.

Automatic Transfer Operation

To select automatic operation:
1. Make sure the transfer switch main contacts are
set to the UTILITY position (loads connected to the
utility power source).
2. Verify that normal UTILITY power source voltage is
available to transfer switch terminal lugs N1 and N2.
3. Press the AUTO button on the control panel
interface.
4. Set the main
Disconnect) to the ON (Closed) position.
With these steps complete, the generator will start
automatically when utility source voltage drops below a
preset level. After the unit starts, loads are transferred to
the standby power source.
Owner's Manual for 7.5 kW PowerPact™
B
Cold Smart Start
).
circuit breaker (Generator
000947