Guardian Technologies 04758-2, 04759-2, 04760-2 Voltage Regulator Adjustment, BREAK-IN Procedure

Section 3 — Operation

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

◆2.7.3 ADDITIONAL CORROSION PROTECTION

Periodically spray all engine linkage parts and brack- ets with corrosion inhibiting spray such as WD-40 or a comparable product.

2.8VOLTAGE REGULATOR

ADJUSTMENT

With the frequency between 62-63.5 Hertz, slowly turn the slotted potentiometer (Figure 2.6) until line voltage reads 244-252 volts.

NOTE:

Remove the access panel on top of the control panel to adjust the voltage regulator.

Figure 2.6 – Voltage Adjustment Potentiometer

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

NOTE:

Selecting this switch position activates fully automatic system operation. It also permits starting and exercising the engine every seven days with the setting of the exer- cise timer (see Section 3.6). This position also is used for remote starting, 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.

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

AUTO OFF MAN.

FUSE

15ASET 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.

14 Generac® Power Systems, Inc.

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.