Generac Power Systems 5253 System SET LED, Fuel Requirements Recommendations, Fuel Consumption

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Section 1 — General Information

1.6SYSTEM SET LED

The “System Set” LED is lit when all of the following conditions are true:

1.The AUTO/OFF/MANUAL switch is set to the AUTO position.

2.The utility voltage being supplied to the unit is being sensed by the PCB. If the utility sense volt- age is not connected to the unit or if it is below approximately 150-160 volts AC, then the system set light will flash rapidly. This indicates that if the AUTO/OFF/ MANUAL switch is placed in the Auto position, the generator will start.

3.No alarms are present, for example, low oil pres- sure, high temperature, etc.

1.7FUEL REQUIREMENTS

AND RECOMMENDATIONS

With LP gas, use only the vapor withdrawal sys- tem. This type of system uses the vapors formed above the liquid fuel in the storage tank.

The engine has been fitted with a fuel carburetion system that meets the specifications of the 1997 California Air Resources Board for tamper-proof dual fuel systems. The unit will run on natural gas or LP gas, but it has been factory set to run on natural gas. Should the primary fuel need to be changed to LP gas, the fuel system needs to be reconfigured. See the Reconfiguring the Fuel System section for instruc- tions on reconfiguration of the fuel system.

Recommended fuels should have a Btu content of at least 1,000 Btus per cubic foot for natural gas; or at least 2,520 Btus per cubic foot for LP gas. Ask the fuel supplier for the Btu content of the fuel.

Required fuel pressure for natural gas is 5 inches to 7 inches water column (0.18 to 0.25 psi); and for liquid propane, 10 inches to 12 inches of water column (0.36 to 0.43 psi).

NOTE:

All pipe sizing, construction and layout must com- ply with NFPA 54 for natural gas applications and NFPA 58 for liquid propane applications. Once the generator is installed, verify that the fuel pressure NEVER drops below four (4) inches water column for natural gas or 10 inches water column for liq- uid propane.

Prior to installation of the generator, the installer should consult local fuel suppliers or the fire mar- shall to check codes and regulations for proper installation. Local codes will mandate correct routing of gaseous fuel line piping around gardens, shrubs and other landscaping to prevent any damage.

Air-cooled Generators

Special considerations should be given when install- ing the unit where local conditions include flooding, tornados, hurricanes, earthquakes and unstable ground for the flexibility and strength of piping and their connections.

Use an approved pipe sealant or joint compound on all threaded fitting.

All installed gaseous fuel piping must be purged and leak tested prior to initial start-up in accordance with local codes, standards and regulations.

1.8FUEL CONSUMPTION

 

Unit

Nat. Gas (*)

LP Vapor (**)

 

 

 

1/2 Load

Full Load

1/2 Load

Full Load

 

 

6/7 kW

66

119

0.82/30

1.47/54

 

 

9/10 kW

102

156

1.25/46

1.93/70

 

 

13/13 kW

156

220

1.55/57

2.18/80

 

 

15/16 kW

173

245

1.59/59

2.51/92

 

*Natural gas is in cubic feet per hour.

**LP is in gallons per hour/cubic feet per hour.

*** Values given are approximate.

‹1.8.1 BTU FLOW REQUIREMENTS -

NATURAL GAS

BTU flow required for each unit based on 1000 BTU per cubic foot.

6kW — 119,000 BTU/Hour

9kW — 156,000 BTU/Hour

13kW — 220,000 BTU/Hour

15kW — 245,000 BTU/Hour

DANGER

Gaseous fuels such as natural gas and liquid propane (LP) gas are highly explosive. Even the slightest spark can ignite such fuels and cause an explosion. No leakage of fuel is permitted. Natural gas, which is lighter than air, tends to collect in high areas. LP gas is heavier than air and tends to settle in low areas.

NOTE:

A minimum of one approved manual shut-off valve must be installed in the gaseous fuel supply line. The valve must be easily accessible. Local codes determine the proper location.

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Contents Listed Authorized Dealer Location IntroductionMaintenance Post Installation Start-up AdjustmentsTroubleshooting Introduction Inside Front Cover Warning  ‹ Standards Index  Electrical Hazards UNPACKING/INSPECTION Protection SystemsBreaker for Bedrooms 7kW, Single Cylinder GH-410 Engine GeneratorSpecifications ‹ 1.5.1 Generator‹ 1.5.2 Engine Fuel Requirements Recommendations System SET LEDFuel Consumption ‹ 1.8.1 BTU Flow Requirements Natural GASReconfiguring the Fuel System ‹ 1.9.1 7 KW, 410CC Engine‹ 1.9.2 10, 13 and 16KW, V-TWIN Engines ‹ 1.10.1 Generator LocationBattery Installation Battery Requirements‹ 1.10.2 Transfer Switch 10.2.1 7, 10, 13, and 16 kW Units if equipped10 Battery Cable Connections BatteryCheck Transfer Switch Operation Before Initial START-UPElectrical Checks Generator Tests Under Load Checking Automatic Operation7KW Natural GAS only ‹ 2.7.1 7 KW Units Engine Governor Adjustment‹ 3.1.3 Manual Position ‹ 3.1.1 Auto PositionSequence of Automatic Operation Automatic Transfer OperationManual Transfer Operation ‹ 3.1.4 Choke Operation‹ 3.4.2 Transfer Back to Utility Power Source Setting the Exercise Timer‹ 3.6.2 High Temperature Switch ‹ 3.6.1 LOW OIL Pressure Switch‹ 3.6.3 Overcrank Approximate Crank Cycle TimesChecking the Engine OIL Level ‹ 3.6.6 LOW BatteryFuses ‹ 3.6.5 RPM Sensor FailureChanging the Engine OIL ‹ 4.3.1 OIL Change Intervals‹ 4.3.2 Engine OIL Recommendations Spark Plugs ‹ 4.4.1 7, 13, and 16KW Generators‹ 4.4.2 10KW Generators Valve Clearance Battery Maintenance11 Cooling Vent Locations Cooling System‹ 4.11.2 Return to Service OUT of Service Procedure‹ 4.11.1 Removal from Service Corrosion ProtectionBe performed by the nearest Authorized Dealer Service ScheduleProblem Cause Correction Troubleshooting GuideAir-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 Your Warranty Rights and Obligations MANUFACTURER’S Emission Control System Warranty CoveragePURCHASER’S/OWNER’S Warranty Responsibilities Emission Related Parts Include the Following Emission Control System WarrantyGenerac Power Systems Standard Limited Warranty for