Section 3 - Operation

Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators

NOTE:

WEEKLY EXERCISE CYCLE

This fuse will not remove the + battery input power from the PCB when it opens. This means the exercise timer will not be reset. If this fuse does open, care- fully check the wiring to the start, fuel, field boost and transfer outputs before replacing the fuse.

METER READING SELECTOR SWITCH:

Switch permits you to select either line-to-line or line-to-neutral voltage and amperage readings on the console AC voltmeter and AC ammeter.

SET EXERCISE TIME SWITCH:

Switch allows you to program the generator to start and exercise automatically. “See Weekly Exercise Cycle.”

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 your particular transfer switch.

RETRANSFER AND SHUTDOWN

When utility power source voltage has been restored, electrical loads may be transferred back to that source and the generator can be shut down as follows:

•Verify that utility power supply voltage to the transfer switch has been positively turned “Off,” using what- ever means provided (such as utility main line circuit breaker).

•Set the generator’s main circuit breaker to its “Off” or “Open” position.

•Let the generator engine run at no-load for a few min- utes, to stabilize internal unit temperatures.

•On the generator console, set the Auto-Off-Manual switch to “Off”. Wait for engine to come to a complete stop.

•For transfer to utility position, refer to the Owner’s Manual of your particular transfer switch.

•Turn on the utility power supply to the transfer switch, using whatever means provided (such as a utility main line circuit breaker). The utility power source now powers the loads.

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.

The generator will start and exercise once every 7 days. During this weekly exercise, the unit runs for about 20 minutes and shuts down. Transfer of loads to genera- tor output does not occur during the exercise.

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 identi- fied 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 you switch the Auto/Off/Manual switch 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 7 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 or control panel fuse is removed, the exercise timer needs to be reset for correct automatic exercise operation.

Figure 3.2 - “Set Exercise” Switch

Generac® Power Systems, Inc. 13

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Generac 004474-1 Manual Transfer and Start UP Retransfer and Shutdown, Automatic Operation, Weekly Exercise Cycle
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004371-2, 004188-1, 004474-1, 004475-1, 004370-2 specifications

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