Generac Power Systems 005240 - Manual (Page 17)

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6. When the highest frequency is reached maximum
power has been set. From this point turn the
adjustment screw 1/4 turn counterclockwise. The
regulator is now set.
7. Turn utility power to the main distribution panel
back on. This can be done by switching the ser-
vice main breaker to the on or closed position.
Allow the generator to shut down.

Do not make any unnecessary adjustments.
Factory settings are correct for most applica-
tions. However, when making adjustments, be
careful to avoid overspeeding the engine.
If this procedure or the test equipment is not avail-
able, locate the nearest Dealer and they can perform
the adjustments.
NOTE:
A service fee may be charged for this adjustment.
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 7 KW UNITS

The engine must be OFF to perform steps 1 and
2.
1. Loosen the governor clamp bolt (Figure 2.4).
Figure 2.4 — Engine Governor Adjustment
Single Cylinder Engines
GOVERNOR
SHAFT
PRIMARY
ADJUST
SCREW
GOVERNOR
CLAMP
BOLT
SECONDARY
ADJUST SCREW
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2. Hold the governor lever at its wide open throttle
position (clockwise), and rotate the governor
shaft clockwise as far as it will go. Then, tighten
the governor lever clamp bolt to 70 inch-pounds
(8 N-m).
3. Start the generator; let it stabilize and warm up
at no-load.
4. Connect a frequency meter across the generators
AC output leads.
5. Turn the primary adjust screw to obtain a fre-
quency reading of 61.5 Hertz. Turn the secondary
adjust screw to obtain a frequency of 62.5 Hz.
6. When frequency is correct at no load, check the
AC voltage reading. If voltage is incorrect, the volt-
age regulator may require adjustment (See the
Voltage Regulator Adjustment section).
2.7.2 13 KW AND 16 KW UNITS
NOTE:
All V-twin units DO NOT require an engine gover-
nor adjustment due to their design.
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.
2.8 VOLTAGE REGULATOR
ADJUSTMENT
2.8.1 7KW UNITS
With the frequency between 62-63 Hertz at no-load,
slowly turn the slotted potentiometer (Figure 2.5)
until line voltage reads 248-252 volts.
2.8.2 10, 13, AND 16KW UNITS
With the frequency between 58-59 Hertz at no-load,
slowly turn the slotted potentiometer (Figure 2.3)
until line voltage reads 247-249 volts.
NOTE:
The access panel on top of the control panel must
be removed to adjust the voltage regulator.
NOTE:
The voltage regulator is housed above the gen-
erator's control panel. The regulator maintains a
voltage in direct proportion to frequency at a 2-to-
1 ratio. For example, at 62 Hertz, line-to-neutral
voltage will be 124 volts.
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Section 2 — Post Installation Start-up and Adjustments
Air-cooled Generators