
Section 3 — Operation
Guardian
◆2.7.2 12 KW AND 15 KW UNITS
1.Loosen governor clamp bolt (See Figure 2.3).
2.Completely remove the idle spring.
3.With governor arm at wide open throttle position, rotate governor shaft fully clockwise. Tighten clamp bolt to 84
4.Start unit and apply full load. Use full load speed adjust screw (Figure 2.4) to adjust frequency to 58 Hz.
5.Remove load, stop engine, loosen the idle adjust screw and reconnect the idle spring.
6.Using your hand, push the governor arm to the closed throttle position. Make sure the idle spring does not stretch at all.
7.Restart the unit.
8.Slowly turn the idle adjust screw to adjust the no- load idle frequency to
9.The governor is now set.
Figure 2.4 — Full Load Speed Adjust Screw
Full Load Speed Adjust Screw
◆2.7.3 ADDITIONAL CORROSION PROTECTION
Periodically spray all engine linkage parts and brack- ets with corrosion inhibiting spray such as
2.8VOLTAGE REGULATOR
ADJUSTMENT
With the frequency between
NOTE:
You must remove the access panel on top of the control panel to adjust the voltage regulator.
Figure 2.5 – Voltage Adjustment Potentiometer
NOTE:
The voltage regulator is housed above the genera- tor's control panel. The regulator maintains a volt- age in direct proportion to frequency at a
3.1BREAK-IN PROCEDURE
Once the unit has been installed and all electrical checks have been made, it is strongly recommended that the following
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.Using the transfer switch’s
5.Run the unit for one hour at 50% rated load.
6.Run the unit for one hour at 75% rated load.
7.Run the unit for one hour at 100% rated 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.Set the generator's Auto/Off/Manual switch to OFF. Remove the 5A and 15A fuses from the gen- erator control panel. Disconnect the battery cables as outlined in “General Hazards” (page 2).
Generac® Power Systems, Inc. 13