Generac 04675-3 BREAK-IN Procedure, Automatic Transfer Operation, Sequence of Automatic Operation

Section 3 — Operation

Generac Air-cooled 7 kW, 12 kW and 15 kW Generators

NOTE:

Figure 3.1 – Generator Control Panel

The voltage regulator is housed above the genera- tor's control panel. The regulator maintains a volt- age in direct proportion to frequency. For example, at 62 Hertz, line-to-neutral voltage will be 124 volts.

3.1BREAK-IN PROCEDURE

Once the unit has been installed, with utility power connected to the transfer switch, and all electrical checks have been made, it is strongly recommended that the following “Break-in Procedure” be completed to ensure correct generator operation in the future.

FUSE
5A	OFF MAN.
AUTO
FUSE
15A	SET
	EXERCISE
	TIME

L o c a t e y o u r n e a r e s t d e a le r a t :

POWER SYSTEMS, INC.

SYSTEM SET

LOW OIL

HIGH TEMP.

OVER SPEED

OVER CRANK

F L A S H IN G G R E E N L E D =

N O U T IL IT Y S E N S E 4 F L A S H IN G R E D L E D S =

E X E R C IS E R N O T S E T

1.Set the generator’s AUTO/OFF/MANUAL switch to AUTO.

2.Turn OFF the utility power supply to the transfer switch using the means provided (such as a utili- ty main line circuit breaker).

3.The unit will start, and the transfer switch will transfer to standby.

4.Run the unit for one hour at 25 percent load.

5.Run the unit for one hour at 50 percent load.

6.Run the unit for one hour at 75 percent load.

7.Run the unit for one hour at 100 percent load.

8.Turn ON the utility power supply to the transfer switch, which will allow the transfer switch to transfer back to utility power. The unit will con- tinue to run for one minute and then shut down.

9.Allow the unit to cool.

10.Drain the oil and remove the oil filter. Replace the oil filter according to Section 4.4, “Changing the Oil Filter”. Replace the oil with synthetic oil as recommended in Section 4.3, “Changing the Engine Oil”.

11.The generator is now ready for service.

3.2USING THE AUTO/OFF/MANUAL SWITCH (FIGURE 3.1)

‹3.2.1 “AUTO” POSITION

Selecting this switch position activates fully automatic system operation. It also permits starting and exercising of the engine every seven days with the exercise timer (see Section 3.6). This position also is used for remote start- ing, when it is set up.

‹3.2.2 “OFF” POSITION

This switch position shuts down the engine. This position also prevents automatic operation.

‹3.2.3 “MANUAL” POSITION

Set the switch to MANUAL to crank and start the engine. Transfer to standby power will not occur unless there is a utility failure.

With the switch set to AUTO, the engine may

!crank and start at any time without warning. Such automatic starting normally occurs when utility power source voltage drops below a pre- set level or during the normal exercise cycle. To prevent possible injury that might be caused by such sudden starts, always set the switch to OFF and remove both fuses before working on or around the generator or transfer switch. Then, place a “Do Not Operate” tag on the gen- erator panel and on the transfer switch.

3.3AUTOMATIC TRANSFER

OPERATION

To select automatic operation, do the following:

1.Make sure the transfer switch main contacts are set to their “Utility” position, i.e., loads connected to the utility power source (Figure 3.2).

2.Be sure that normal utility power source voltage is available to transfer switch terminal lugs N1 and N2.

3.Set the generator’s AUTO/OFF/MANUAL switch to AUTO.

4.Set the generator’s main circuit breaker to its ON (or closed) position.

With the preceding steps complete, the generator will start automatically when utility source voltage drops below a preset level. After the unit starts, loads are transferred to the standby power source. Refer to Section 3.4, “Sequence of Automatic Operation.”

3.4SEQUENCE OF AUTOMATIC

OPERATION

The generator’s control panel houses a control logic circuit board. This board constantly monitors utility power source voltage. Should that voltage drop below a preset level, circuit board action will signal the engine to crank and start. After the engine starts, the circuit board signals the transfer switch to activate and connect load circuits to the standby power sup- ply (load terminal lugs T1/T2 connect to terminal lugs E1/E2).

14 Generac® Power Systems, Inc.