Transfer To Utility Power Source; Automatic Transfer Operation; Automatic Sequence Of Operation; Utility Failure - Generac Power Systems 20 kW Synergy Owner's Manual

Operation

Transfer to Utility Power Source

When utility power has been restored, transfer to utility
source and shut down the generator. 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 control panel OFF button. The engine
will shut down.
4. Verify that utility power supply to the transfer switch
is turned off.
5. Move the main contacts to the UTILITY position
(loads connected to the utility power source) using
the manual transfer handle (A in
the transfer switch.
6. Turn on the utility power supply to the transfer
switch using the means provided.
7. Press the control panel AUTO button.
8. Return the MLCB (generator disconnect) to ON
(CLOSED).

Automatic Transfer Operation

Proceed as follows to select automatic operation:
1. Verify that the transfer switch main contacts are set
to UTILITY (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 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.
18

Automatic Sequence of Operation

Utility Failure

With the generator set to AUTO, when utility fails (below
65% of nominal) a 5 second (dealer programmable) line
interrupt delay time is started. If utility is still gone when
the timer expires, the engine will crank and start. Once
started, a five second engine warm-up timer will be
initiated (warm up time varies—refer to
Start). When the warm-up time expires, the controller will
transfer the load to the generator. If the 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 (5 second warm-up time has not elapsed),
the controller will complete the start cycle and run the
generator through its normal cool down cycle, however,
Figure 3-9) inside
the load will remain on the utility source.

Cranking

The system will control the cyclic cranking as follows:

Cold Smart Start

The Cold Smart Start feature monitors the ambient
temperature and adjusts the warm-up delay upon start up
in AUTO mode based on prevailing conditions.
The generator will startup with the normal warm-up delay
of 5 seconds if the ambient temperature is at or above
the fixed temperature.
A check for proper output voltage build up will be
performed when the generator engine is started.
If some condition impedes normal voltage creation, such
as frost crystals or dust/dirt preventing a good electrical
connection, the start sequence will be interrupted so that
a cleaning cycle of the internal electrical connections can
be attempted.
The cleaning cycle is an extended warming up period
which lasts for several minutes while the normal
generator voltage output is determined to be low. During
this cycle, the generator controller will display "Warming
Up" on the display screen.
The generator controller display will show "Under
Voltage" if the cleaning cycle fails to clear the obstruction.
After several minutes, the alarm message can be
cleared, and the generator restarted.
If the problem persists, make no further attempts to start.
Contact an IASD.
•
Five cranking cycles as follows: 16 second crank,
seven (7) second rest, 16 second crank, seven (7)
second rest, followed by three (3) additional cycles
of seven (7) second cranks followed by seven (7)
second rests.
Owner's Manual for 60 Hz Synergy™ Generators
Cold Smart