Baldor GLC125, GLC35, GLC80, GLC50 Garretson Model KN Fuel Valve Considerations General, Service

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Garretson Model KN Fuel Valve Considerations

General

The KN is designed for sensitivity and simple operation. It is used with low–pressure vaporized gaseous fuels, where dependable starting is a requirement. Because of its extreme sensitivity, the KN offers excellent results in most remote starting applications (Standby power generators, etc.). With proper installation and maintenance, the KN will provide years of trouble–free service.

Operation

The KN is an atmospheric zero governor which acts like the float and needle valve in a gasoline carburetor. Air–flow through a venturi in the carburetor creates a vacuum, which acts through the outlet of the KN on the diaphragm. Atmospheric pressure then forces the diaphragm toward the vacuum, depressing the lever and pulling the valve seat away from the orifice, which allows fuel to flow as long as the demand persists. When the vacuum ceases, a spring force pushes on the lever and forces the valve seat against the orifice shutting off the fuel flow. It is important to remember that fuel should not flow through the KN when the engine is not running.

A properly adjusted KN requires a vacuum of only 0.25” to 0.35” of water column to start the opening sequence. Due to this sensitivity, most installations do not need priming to start unless low cranking speeds or restricted and lengthy piping are required. If priming is necessary and a manual primer is installed, use only 1 or 2 second bursts of fuel and immediately try to start the engine. If there is a choke on the carburetor, do not use it as this will probably cause flooding and hard starting. As you can see, the operation of this unit is simple and basic. If you are having trouble operating the engine, in most cases the fuel controller is not malfunctioning. There is generally a problem with the engine or fuel supply. so do not make adjustments or attempt to service the KN until you are sure it is needed.

Figure 4-14 Garretson KN Fuel Valve

Outlet

Mount

Primer (Optional)

Lock–Off

Adjustment

Inlet

Mount

Service

The KN should be periodically checked for leakage past the valve seat and the vents on the cover kept clean and free of obstructions. If the KN needs service we suggest you take it to a qualified serviceman. If that help is not available Garretson will furnish you a list of repair shops with the proper service information.

MN2408

Operation 4-25

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Contents GLC Generator California Proposition 65 Warning Table of Contents Appendix a Generator AC Metering Engine Parameter DisplayRead This Manual Thoroughly Section Product Safety InformationOperation SymbolsOperation Warning Statements Burn Installation Maintenance Product Safety Information MN2408 Labor Parts Limited WarrantyWarranty Period General Information MN2408 Site Planning Installation GuidelinesRoom Air Controls and Transfer SwitchEngine Cooling System Exhaust SystemVibration Isolators Foundation Design Foundation ChecklistSetting The Genset On An Existing Concrete Floor Slab Approximate Weight vs. kW Output Weight Of The GensetCalculate Soil Bearing Load SBL Capacity Designing An Isolated FoundationApproximate Load Bearing Capacities of Various Soil Types Typical Foundation InstallationLevel Of Attenuation Exhaust System Exhaust ChecklistSystem Placement Multi-Engine InstallationsExhaust System Calculations Exhaust Piping Radiator Cooling Cooling System Cooling System ChecklistCooling System Design Engine Mounted Radiator Cooling Heat ExchangerCooling System Determination Remote Radiator Cooling Hot Well Installations11 Valves & Fittings and Fluid Flow in Pipe Other Considerations 13 Coolant Mixture Wind Barrier Air System Air System ChecklistEngine Crankcase Ventilation Transfer Switch Location Transfer Switch Transfer Switch ChecklistBattery Location Battery Starting SystemBattery Cables Battery ChargerGeneral Information MN2408 Generator Lifting When the Generator is installed outdoorsGenerator Mounting Mounting DimensionsVentilation Test Secure the GeneratorGuidelines for Exhaust System Hot Exhaust GassesBackpressure must not exceed 20 of water column Page General Considerations Fuel ConnectionsFuel Consumption Natural and LPG Natural Gas Flow Rate Cubic Feet per Hour per Pipe Length Example Determining Pipe Size for Natural GasNatural Gas Connections LP Gas Flow Rate Cubic Feet per Hour per Pipe Length Example Determining Pipe Size for LPGRating Transfer Switch ConsiderationsThree Phase WYE and Delta Connections Frame Ground Connection Battery Charger ConsiderationsGeneral Wiring Considerations Page GLC125 Recommended Engine Oil and Battery TypePost Installation Checks GLC100Post Installation Checks Programming Keys Run SwitchOn when the OFF Switch is used to stop the engine Operator Control Panel Digital Engine Controller OnlyAutomatic Start/Stop Operator Control PanelManual Start/Stop Automatic Mains Failure AMF Automatic Fault ShutdownLoad Test Push-button Operation Utility Power Failure ConditionsUtility Power Restored Utility Normal ConditionNo Load Test Engine Controller Inputs & Outputs Analog Faults Engine starter motor RunSuch as Fuel Rack Solenoids or electronic governors CrankNormal Are no active faultsAction Description Display Comments Front panel keypad push-buttonOther time delay functions are Vbc Displays the generators output voltage Phase system not applicableGenerator KVA Display Vab Displays the generators output voltageBattery Voltage/Engine Speed Navigation Hints Main Menu Loop Voltage Calibration Procedure Displayed values Repeat for each phaseSpan Calibration Used Engine Temperature & Oil Pressure CalibrationDisplays the type of calibration function Oil PressureConfiguration Data Sheet Main Menu Loop Parameters Battery Voltage Fault Name Input Analog198 F Alarm Parameter Setting Volts A-BEngine Control Connections 10 Analog Operator Control Panel Operator Control Panel Analog Engine Controller Only11 9957N Analog Engine Controller Connections 12 A121H Analog Engine Controller Connections Garretson Model KN Fuel Valve Considerations General ServiceInstallation Engine Section Troubleshooting and MaintenanceGeneral Troubleshooting Guide Problems and SolutionsTroubleshooting Guide Digital Controller Only Speed Troubleshooting Guide Analog Controller OnlyVerify the adjustments. Replace controller if failed DIODE, 1N5408 Part numberLAMP, #67, 12 Volt Replacement PartsGLC GLC125 Cable Jam Nut Flywheel Housing Magnetic PickupFLA GLC Circuit Breaker & Electrical DataGLC Data 259 300 MN2408 Series GLC A-7 144 150 GLC Wire Size Figure A-2 Customer Interface Connection Diagram MN2408 Series GLC A-11 Figure A-4 Single Phase w/o Breaker Connection Diagram Figure A-5 Single Phase One Breaker Connection Diagram Figure A-6 Single Phase Two Breaker Connection Diagram MN2408 Series GLC A-15 Series GLC MN2408 MN2408 Series GLC A-17 Series GLC MN2408 Figure A-11 Three Phase Connection Diagram Figure A-12 Three Phase Connection Diagram with PMG MN2408 Series GLC A-21 Series GLC MN2408 MN2408 Series GLC A-23 Series GLC MN2408 MN2408 Series GLC A-25 Series GLC MN2408 MN2408 Series GLC A-27 Figure A-20 Control Box Connections with MEC2 Controller Figure A-21 Engine Wiring, Woodward 4.3L GM Figure A-22 Engine Wiring, Woodward 5.7L GM Figure A-23 Engine Wiring, Woodward 8.1L GM Series GLC MN2408 No Load PowerName Address Phone Model Number Job Number Standby ContinuousProper belt alignment and tensions Adjust the AC voltage to match the normal sourceSwitch Are legibleBaldor District Offices Baldor Electric Company MN2408 04 FAR200
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