Generac 004912-0, 004912-1, 004913-0, 004913-1 Manual Transfer START-UP Automatic Operation

Section 3 - Operation

Centurion Liquid-cooled 15 kW and 25 kW Generators

‹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.

•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.

‹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.”

3.3MANUAL 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.

3.4AUTOMATIC 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.

•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

3.5WEEKLY 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.

14 Generac® Power Systems, Inc.

3.6ENGINE 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.