Kohler 7ER, Installation Manual

Page: 32 / 40

22 Reconnection/Adjustments TP-6034 10/02
See Figure 8-5 to identify the potentiometers on the
PowerBoost
t
IIIE voltage regulator.
Stabilizer Potentiometer (Pot) —Fine-tunes the
regulator circuitry to reduce light flicker.
Voltage Adjustment Potentiometer (Pot) —Adjusts
the generator voltage output within a range of
approximately 100--130 volts.
Volts/Hz Potentiometer (Pot) —Determines the engine
speed (Hz) at which the generator output voltage begins
to drop.
Note: For optimum results, apply full load for voltage
regulator adjustment.
Voltage Regulator Adjustment Procedure
1. With the generator set off, turn the remote
rheostat, if equipped, to midpoint.
2. Turn voltage, volts/Hz, and stability pots fully
counterclockwise.
3. Connect the voltmeter and frequency meter to the
AC circuit or an electrical outlet.
4. Start the generator set.
5. Rotate the voltage adjustment pot clockwise to
increase the voltage (counterclockwise to
decrease the voltage) to the desired output
voltage.
6. Rotate the stability pot clockwise to minimize
light flicker.
7. Readjust the voltage adjustment pot, if
necessary.
8. Adjust the engine speed to the desired cut-in
frequency (factory setting 57.5--58 Hz for 60-Hz
models) as measured on the frequency meter.
9. Rotate the volts/Hz adjustment pot clockwise
until the voltage level (as measured on voltmeter)
begins to drop. When set to these specifications,
the generator attempts to maintain normal output
until the engine speed drops below the frequency
set in step 5 (as load is applied).
10. Readjust the engine speed to normal (63 Hz/
1890 RPM for 60 Hz).
11. Readjust the voltage adjustment pot, if
necessary.
12. Readjust the stability pot, if necessary.
13. Use the remote rheostat, if equipped, to make final
voltage adjustments.
14. Stop the generator set.