Transfer To Utility Power Source; Automatic Transfer Operation; Automatic Sequence Of Operation; Utility Failure - Generac Power Systems G0071411 Owner's Manual

Transfer to Utility Power Source

Shut down generator and transfer to utility source when
utility power has been restored. Proceed as follows to
manually transfer to utility power and shut down the
generator:
1. Set the MLCB (generator disconnect) to OFF
(OPEN).
2. Run engine for two minutes at no-load to stabilize
the internal temperature.
3. Press the OFF mode button on the control panel.
The engine will shut down.
4. Verify utility power supply to transfer switch is
turned OFF.
5. Set the main contacts to the UTILITY position
(loads connected to the utility power source) using
manual transfer handle (A in
transfer switch.
6. Turn on the utility power supply to transfer switch
using the means provided.
7. Press the AUTO mode button on the control panel.
8. Return the MLCB (generator disconnect) to ON
(CLOSED).
9. Close and lock the lid.

Automatic Transfer Operation

Proceed as follows to select automatic operation:
1. Verify transfer switch main contacts are set to
UTILITY (loads connected to the utility power
source).
2. Verify normal utility power source voltage is
available to loads connected to transfer switch.
3. Press the AUTO mode button on the generator
control panel.
4. Set the MLCB (generator disconnect) to ON
(CLOSED).
The generator will start automatically when utility source
voltage drops below a preset level. Loads are transferred
to the standby power source after the unit starts.
Owner's Manual for 60 Hz Air-Cooled Generators
Figure 3-11) inside
Automatic Sequence of
Operation

Utility Failure

If generator is set to AUTO, when utility fails (below 65%
of nominal) a 5 second (dealer programmable) line
interrupt delay time is started. The engine cranks and
starts if utility is not available when the timer expires. An
engine warm-up timer will be initiated once engine is
started. Timer duration varies depending on whether or
not Cold Smart Start is enabled. The controller will
transfer the load to the generator when the warm-up time
expires. If utility power is restored (above 80% nominal)
at any time from the initiation of the engine start until the
generator is ready to accept load (warm-up time has not
elapsed), the controller completes the start cycle and
runs the generator through its normal cool down cycle.
However, the load will remain on the utility source.

Cranking

The system will control the cyclic cranking as follows:
•
Five cranking cycles of: 16 seconds cranking, 7
seconds resting, 16 seconds cranking, 7 seconds
resting, followed by three additional cycles of 7
seconds cranking followed by 7 seconds resting.
NOTE: An alarm will be triggered if the generator does
not start after these five attempts.
Operation
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