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14 Generac
®
Power Systems, Inc.
3.2.5 7.5 AMP IN-LINE FUSE
This in-line fuse is connected in wire 15A which runs
between the AUTO/OFF/MANUAL switch and position
10 of the 076009A PCB. This fuse protects the start,
fuel, field boost, and transfer outputs from the PCB
and will open if there is excessive current draw on
any one of these outputs. If this fuse has melted open
or is removed, the control board will be disabled and
the unit will not be able to crank and run when the
AUTO/OFF/MANUAL switch is placed in the AUTO or
MANUAL positions. Replace the fuse with an identical
AGC 7.5 amp fuse.
NOTE:
This fuse will not remove the positive (+) battery
input power from the PCB when it opens. This
means the exercise timer will not be reset. If this
fuse does open, carefully check the wiring to the
start, fuel, field boost and transfer outputs before
replacing the fuse.
3.2.6 SET EXERCISE TIME SWITCH
This switch allows for programming the generator to
start and exercise automatically. See Section 3.5,
“Weekly Exercise Cycle.”
3.3 MANUAL TRANSFER AND
START-UP
To transfer electrical loads to the STANDBY
(GENERATOR) power source side and start the
engine manually, refer to the Owner’s Manual of the
particular transfer switch.
3.4 AUTOMATIC OPERATION
To set the system for fully automatic operation,
proceed as follows:
• Check that load circuits are connected to the
utility power supply.
• Set the AUTO/OFF/MANUAL switch to its AUTO
position.
• Set the generator main circuit breaker to its ON or
CLOSED position.
3.5 WEEKLY EXERCISE CYCLE
The generator will start and exercise once every seven
days. During this weekly exercise, the unit runs for
about 20 minutes and shuts down. Transfer of loads
to generator output does not occur during the
exercise period.
To select day and time for exercising, proceed as
follows:
• Set the AUTO/OFF/MANUAL switch to OFF.
• Set generator main circuit breaker to OFF or
OPEN.
• Locate the rocker switch on the control panel
identified with the words “Set Exercise Time”
(Figure 3.2).
• Push “Set Exercise Time” switch to ON position for
20 to 30 seconds and then release. Switch will
spring back into its original position when
released.
• Wait 30 seconds before setting the AUTO/OFF/
MANUAL switch to AUTO position.
If the AUTO/OFF/MANUAL switch is switched
too soon, the engine may start. If engine does
start, it will shut down automatically in about
two (2) minutes.
• Set the generator main circuit breaker to its ON or
CLOSED position.
• Generator is now programmed to start and
exercise every seven days thereafter, on day and
time of day the switch was actuated.
• Place a sign on the generator control panel and the
transfer switch, indicating the day and time the
generator will be exercising.
NOTE:
If battery terminals are disconnected, the exercise
timer needs to be reset for correct automatic
exercise operation.
Figure 3.2 - “Set Exercise” Switch
3.6 ENGINE BLOCK HEATER
This standby generator comes equipped with a block
heater (Figure 3.3), similar to the block heaters used
in automotive applications. The block heater is wired
to a grounded plug.
!
Section 3 - Operation
Centurion Liquid-cooled 15 kW and 25 kW Generators