Full Product Manual

Operation
16 Owner’s Manual for 60 Hz Air-Cooled Generators
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 Figure 3-10)
inside 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 se
t
to UTILITY
(loads connected to the utility powe
r
source).
2. V
erify that normal utility power source voltage is
available to transfer switch terminal lugs N1, N2,
and N3.
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.
Automatic Sequence of Opera-
tion
Utility Failure
If the generator is set to AUTO, when utility fails (below
65% of nominal) a 5 second (factory default/dealer
programmable) line interrupt delay time is started. The
engine cranks and starts if the utility is still gone when the
timer expires. An engine warm-up timer will be initiated
once 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 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
(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:
• The system will go through five cranking cycles as
follows: 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.