Generac 02010-2, 04164-2 Primary Regulator, Some Important Considerations, Vapor Withdrawal

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Section 2 – Installation

PRIMEPACT 50 Recreational Vehicle Generator

Figure 2.15 – Typical Propane Gas Fuel System

2.5.4 PRIMARY REGULATOR

2.5.2 SOME IMPORTANT CONSIDERATIONS

When installing an LP gas system, consider seriously the following items:

All fittings, lines, hoses and clamps must be tight and free of leaks. Apply a pipe sealant to threads when assembling threaded connections. This reduces the possibility of leakage.

Test the entire fuel system for leaks using approved test methods.

Optimum gas pressure at the inlet to the gaseous fuel solenoid valve and secondary regulator is 11 inches water column.

The installer’s fuel supply connection point is at the gaseous fuel solenoid valve. This is a 3/4-inch (female) connection. Provide a suitable 3/4-inch NPT (male) connector to attach to the fuel supply line.

Use a length of approved flexible fuel hose between the gaseous fuel solenoid valve and rigid gas pip- ing. The flexible line should be at least 6 inches longer than necessary.

2.5.3 VAPOR WITHDRAWAL

LP gas is stored in pressure tanks as a liquid. The gas systems used with these generators were designed only for vapor withdrawal type systems. Vapor withdrawal systems use the gas vapors that form above the liquid fuel in the tank. Do NOT attempt to use the generator with any liquid with- drawal type system.

Gas pressure delivered to the solenoid valve must be properly regulated by means of a primary gas regula- tor. Mount the primary regulator at the gas tank out- let or in the supply line from the gas tank. The fol- lowing rules apply:

For best results, the primary regulator supplies gaseous fuel to the secondary regulator at 11 inch- es water column. Do NOT exceed 14 inches water column.

The installer must be sure the primary regulator is rated at sufficient gas flow to operate the generator plus all other gas appliances in the circuit.

NOTE:

Recommended MINIMUM gas flow rate for all air- cooled PRIMEPACT series generators is 67 cubic feet per hour.

If an existing primary gas regulator does not have a sufficient flow capacity for the generator and other gas appliances in the circuit, (a) install a pri- mary regulator with adequate flow rate, or (b) install a separate regulator only and rated at least 67 cubic feet per hour. The inlet side of any pri- mary regulator that supplies the generator must connect directly to a gas pressure tank. Do NOT tee the generator line into a gas circuit feeding other areas.

2.5.5 GASEOUS CARBURETION

LP gas vapors should be supplied to the secondary regulator inlet at about 11 inches water column (pos- itive pressure). The engine pistons draw air in during the intake stroke (Figure 2.16). This air passes through a carburetor venturi, which creates a low pressure that is proportional to the quantity of air being pumped. The low pressure from the carburetor venturi acts on the regulator diaphragm to pull the diaphragm toward the source of low pressure. A lever attached to the diaphragm opens a valve to permit gas glow through the carburetor.

Figure 2.16 – LP Gas Carburetion Diagram

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Contents Power SYSTEMS, INC Introduction Authorized Service Dealer LocationTable of Contents Part II Installation InstructionsGeneral Hazards Electrical Hazards Model 02010-2 Primepact Generator IdentificationModel 04164-2 Primepact 50LP Generator AC Connection System SafetySpecifications Generator ApplicabilityGenerator Optional Propane Fuel SystemFuel Consumption Engine OIL RequirementsFuel Primer START/STOP SwitchGenerator Control Panel Optional Remote START/STOP PanelBefore Starting the Engine Automatic Choke Gasoline onlySUMMER/WINTER Heat Riser System Starting the GeneratorStopping the Generator Applying Loads to GeneratorDo not Overload the Generator LOW OIL Pressure SwitchHigh Temperature Switch Protection SystemsAdditional Information Changing the Engine OIL AND/OR OIL Filter Checking the Engine OIL LevelChecking the Engine Spark Plug Maintaining the Engine AIR CleanerClean AIR Intake Cleaning the Foam PrecleanerWeekly Cleaning the GeneratorBattery Maintenance Spark Arrestor MufflerExercising the Generator Drive BeltRemoval from Service OUT of Service ProcedureReturn to Service Part General Hazards Fire Hazards Generator Engine Operating Speed Purpose and Scope ManualStandards Booklets Equipment DescriptionMajor Features and Dimensions Suspended Mounting Location and SupportGenerator Location Generator SupportCompartment Size Generator CompartmentsGenerator Restraint Compartment ConstructionSound Insulating Materials AcousticsTypical Noise Abatement 2.2.5 Compartment Floor Cutouts Generator Airflow Cooling and Ventilating AIRCooling AIR Inlet Openings Gasoline Fuel System Testing the InstallationCompensating for Restrictions Rigid Fuel Lines LP GAS Fuel SystemFuel Tank Flexible Fuel Line Generator Fuel Supply LineGaseous Carburetion Primary RegulatorSome Important Considerations Vapor WithdrawalLeakage Tests Exhaust SystemFuel Supply Lines Excess Flow ValveType of Exhaust System Exhaust System SafetyElectrical Connections Mufflers and Spark ArrestorsConduit WiringIsolating Different Power Sources Generator AC ConnectionsGround Fault Circuit Interrupters Power Supply CordBattery Cable Connections Optional AccessoriesRecommended Battery Battery CablesRemote Panel Models Post Installation TestsTesting Under Load Before Initial START-UPInstallation Checklist Problem Cause Correction Troubleshooting GuideElectrical Data Electrical Data Exploded Views and Parts Lists QTY Description Exploded Views and Parts Lists REGULATOR, GAS Fuel Exploded Views and Parts Lists Lower Bearing Carrier Exploded Views and Parts Lists ¼/ M6-LOCK Washer To Starter SCROLL, Flywheel Exploded Views and Parts Lists Piston Ring SET Exploded Views and Parts Lists MANIFOLD, Intake Exploded Views and Parts Lists CARBURETOR, GN 410 L/P MANUFACTURER’S Emission Control System Warranty Coverage Your Warranty Rights and ObligationsPURCHASER’S/OWNER’S Warranty Responsibilities Emission Related Parts Include the Following Emission Control System WarrantyThis Warranty Shall not Apply to the Following Warranty Schedule CONSUMER/PERSONAL Applications