Generac Power Systems Comprehensive Guide to Generac Governor Adjustment for Portable Generators

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Section 2 — Post Installation Start-up and Adjustments

Air-cooled Generators

1.

Turn off utility power to the main distribution

 

 

panel in the house. This can be done by switching

 

 

the service main breaker to the off or open posi-

 

 

tion.

 

 

 

2.

Allow the generator to start. Before loading the

 

 

generator, confirm that the No Load Frequency,

 

 

with the roof open and door off, is set to 63-63.5

 

 

Hz. Transfer load to emergency circuits.

3.

Turn on appliances, lights, pumps, etc., that are

 

 

on the emergency circuits in an attempt to fully

 

 

load the generator. Be cautious not to overload

 

 

the generator. Use the following chart as a guide:

 

 

 

 

 

 

 

Unit

120 Volts

240 Volts

 

 

 

7 kW

50.0 amps

25.0 amps

 

 

 

 

4.

When 3/4 load has been achieved. Connect a fre-

 

 

quency meter to the output lugs of the generator’s

 

 

main line circuit breaker.

 

 

5.

The fuel regulator is fitted with one adjustment

 

 

screw. While watching the frequency meter, slowly

 

 

turn the adjustment screw clockwise or counter-

 

 

clockwise until the highest frequency is read on

 

 

the meter. Only limited adjustment is available

 

 

because of the set pin. Under no circumstances

 

 

should any of the pins be removed (Figure 2.1).

Figure 2.1 — 7kW Fuel Regulator

410cc Engine

Adjustment

Set

Screw

(One Side

Pin

Only)

 

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.

14

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.

2.7ENGINE 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

The2. engine must be OFF to perform steps 1 and

1.Loosen the governor clamp bolt (Figures 2.2).

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.

Figure 2.2 — Engine Governor Adjustment

Single Cylinder Engines

SECONDARY

ADJUST SCREW

GOVERNOR

SHAFT

GOVERNOR

PRIMARY

CLAMP

ADJUST

BOLT

SCREW

 

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Contents Listed Introduction Authorized Dealer LocationPost Installation Start-up Adjustments MaintenanceTroubleshooting Introduction Inside Front Cover Warning   Electrical Hazards  ‹ Standards IndexProtection Systems UNPACKING/INSPECTIONBreaker for Bedrooms Generator 7kW, Single Cylinder GH-410 Engine‹ 1.5.1 Generator Specifications‹ 1.5.2 Engine System SET LED Fuel Requirements RecommendationsFuel Consumption ‹ 1.8.1 BTU Flow Requirements Natural GAS‹ 1.9.1 7 KW, 410CC Engine Reconfiguring the Fuel System‹ 1.9.2 10, 13 and 16KW, V-TWIN Engines Location ‹ 1.10.1 GeneratorBattery Requirements Battery Installation‹ 1.10.2 Transfer Switch 10.2.1 7, 10, 13, and 16 kW Units if equippedBattery 10 Battery Cable ConnectionsBefore Initial START-UP Check Transfer Switch OperationElectrical Checks Checking Automatic Operation Generator Tests Under Load7KW Natural GAS only Engine Governor Adjustment ‹ 2.7.1 7 KW Units‹ 3.1.1 Auto Position ‹ 3.1.3 Manual PositionAutomatic Transfer Operation Sequence of Automatic OperationManual Transfer Operation ‹ 3.1.4 Choke OperationSetting the Exercise Timer ‹ 3.4.2 Transfer Back to Utility Power Source‹ 3.6.1 LOW OIL Pressure Switch ‹ 3.6.2 High Temperature Switch‹ 3.6.3 Overcrank Approximate Crank Cycle Times‹ 3.6.6 LOW Battery Checking the Engine OIL LevelFuses ‹ 3.6.5 RPM Sensor Failure‹ 4.3.1 OIL Change Intervals Changing the Engine OIL‹ 4.3.2 Engine OIL Recommendations ‹ 4.4.1 7, 13, and 16KW Generators Spark Plugs‹ 4.4.2 10KW Generators Battery Maintenance Valve ClearanceCooling System 11 Cooling Vent LocationsOUT of Service Procedure ‹ 4.11.2 Return to Service‹ 4.11.1 Removal from Service Corrosion ProtectionService Schedule Be performed by the nearest Authorized DealerTroubleshooting Guide Problem Cause CorrectionAir-cooled Generators Air-cooled Generators Air-cooled Generators Mounting Dimensions Electrical Data Engine Wiring Customer Connection Battery Charger Engine Alternator Engine Wiring Stator Electronic Voltage Regulator Manual Auto Scsm Neutral Electrical Data Electrical Data Sheet Metal PAINT/MATERIAL Code Legend Part NO. QTY. Description Air-cooled Generators Control Panel Drawing No F9695-C QTY Description Exploded Views and Parts Lists BOX Load Center Exploded Views and Parts Lists Description QTY Exploded Views and Parts Lists Washer Flat M8 5/16 Exploded Views and Parts Lists Crankcase Exploded Views and Parts Lists Intake Adapter Exploded Views and Parts Lists PIN, Piston D20 Exploded Views and Parts Lists SCREW, Taptite M6-1.0X8 Yellow Chrome Air-cooled Generators 7kW, GN-410 Engine Drawing No F9422-B ADAPTOR, Engine Exploded Views and Parts Lists ADATOR, Engine 7KW CASTING, Twin Regulator Housing 7KW Exploded Views and Parts Lists Brkt Regulator Mounting MANUFACTURER’S Emission Control System Warranty Coverage Your Warranty Rights and ObligationsPURCHASER’S/OWNER’S Warranty Responsibilities Emission Control System Warranty Emission Related Parts Include the FollowingGenerac Power Systems Standard Limited Warranty for