Generac 004692-2 Setting the Exercise Timer, ‹ 3.5.2 Transfer Back to Utility Power Source

Section 3 — Operation

Air-cooled 8.5 kW Generator

DANGER DANGER

Do not attempt to activate the transfer switch manually until all power voltage supplies to the switch have been positively turned off. Failure to turn off all power voltage supplies may result in extremely hazardous and possibly fatal electrical shock.

4.Use the manual transfer handle inside the trans- fer switch to move the main contacts to their “Standby” position, i.e., loads connected to the standby power source (Figure 3.2).

5.To crank and start the engine, set the AUTO/OFF/MANUAL switch to MANUAL.

6.Let the engine stabilize and warm up for a few minutes.

7.Set the generator’s main circuit breaker to its ON (or closed) position. The standby power source now powers the loads.

Figure 3.2 – Manual Transfer Switch Operation

‹3.5.2 TRANSFER BACK TO UTILITY POWER SOURCE

When utility power has been restored, transfer back to that source and shut down the generator. This can be accomplished as follows:

1.Set the generator’s main circuit breaker to its OFF (or open) position.

2.Let the engine run for a minute or two at no-load to stabilize the internal temperatures.

3.Set the generator’s AUTO/OFF/MANUAL switch to its OFF (or open) position. The engine should shut down.

4.Check that UTILITY power supply to the transfer switch is turned OFF.

Do not attempt to activate the transfer switch manually until all power voltage supplies

to the switch have been positively turned off. Failure to turn off all power voltage supplies may result in extremely hazardous and possibly fatal electrical shock.

5.Use the manual transfer handle inside the trans- fer switch to move the main contacts back to their UTILITY position, i.e., loads connected to the UTILITY power source (Figure 3.2).

6.Turn ON the UTILITY power supply to the trans- fer switch using the means provided.

7.Set the system to automatic operation as outlined in “Automatic Transfer Operation,” Section 3.3.

3.6SETTING THE EXERCISE TIMER

The generator is equipped with an exercise timer. Once it is set, the generator will start and exercise once every seven days, on the day of the week and at the time of day the following sequence is completed. During this exercise period, the unit runs for approx- imately 12 minutes and then shuts down. Transfer of loads to the generator output does not occur during the exercise cycle.

A switch on the control panel (see Figure 3.1) permits selection of the day and time for system exercise. To select the desired day and time of day, the following sequence must be performed at that time.

1.Verify that the AUTO/OFF/MANUAL switch is set to AUTO.

2.Hold down the “Set Exercise Time Switch” until the generator starts (approximately 10 seconds) and then release. During this time all the red LEDs on the control panel will flash to indicate board is resetting itself.

3.The generator will start and run for approximately 12 minutes and then shut down on its own. The exerciser will then be set to run at that time of day every week.

NOTE:

The exerciser will only work in the AUTO mode and will not work correctly unless this procedure is performed. The exerciser will need to be reset every time the 12-volt battery is disconnected and then reconnected. The exerciser WILL NOT work if dip switch 2 on the controller printed circuit board (“Remote Not Auto”) is ON.

If the exerciser is not set using the “Set Exercise Time Switch”, the generator will automatically exercise 7 days after the battery connection was made.

Generac® Power Systems, Inc. 15