2.7 ENGINE GOVERNOR ADJUSTMENT
If both AC frequency and voltage are correspondingly
high or low, adjust the engine governor as follows:
2.7.1 15 KW UNITS
1. Loosen governor clamp bolt (See Figure 2.3).
Figure 2.3 — V-twin Engine Governor
Adjustment
Governor Clamp Bolt
Governor
Shaft
(Rotate
Clockwise)
Idle Spring
No Load Idle
Adjustment Screw
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 inch-pounds.
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. Push the governor arm to the closed throttle posi-
tion. 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 63-63.5 Hz.
9. The governor is now set.
Figure 2.4 — V-twin Full Load Speed Adjust
Screw
Full Load Speed Adjust Screw
2.8
VOLTAGE REGULATOR
ADJUSTMENT
With the frequency between 62-63.5 Hertz, slowly
turn the slotted potentiometer (Figure 2.5) until line
voltage reads 244-252 volts.
NOTE:
Remove the access panel on top of the control
panel to adjust the voltage regulator.
Figure 2.5 – Voltage Adjustment Potentiometer
NOTE:
The voltage regulator is housed above the generator's
control panel. The regulator maintains a voltage in
direct proportion to frequency. For example, at 62
Hertz, line-to-neutral voltage will be 124 volts.
3.1 BREAK-IN
PROCEDURE
Once the unit has been installed 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.
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 utility
main line circuit breaker).
3. The unit will start, and the transfer switch will
transfer to standby.
4. Using the transfer switch’s built-in emergency
load center, turn on circuits to load the generator
to approximately 25% rated load and run the unit
for one hour.
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.
12
Section 3 — Operation
15 kW Generator
