Guardian Technologies 004270-2 owner manual Stopping the Generator, Protection Systems

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Section 2 – Operation

QUIETPACT™ 75D Recreational Vehicle Generator

2.If the engine is cold, press the Preheat switch for a maximum of 15 to 30 seconds.

3.While pressing the Preheat switch to crank the engine, hold the engine Start/Stop switch in the START position. When the engine starts, release the switches.

If the engine does not start after it has been

!cranking for 15 seconds, release the Start/Stop switch, wait 15 seconds, and try again. Holding the switch for longer than 15 seconds can damage the starter motor.

4.Let the engine run at no-load for a few minutes to stabilize and warm up.

5.Turn ON electrical loads, using the means provided in the vehicle (such as, a main-line cir- cuit breaker or transfer switch).

2.5STOPPING THE GENERATOR

1.Turn OFF all electrical loads, using the means provided in the vehicle (such as, a main-line cir- cuit breaker or transfer switch).

2.Let the generator run at no-load for a few minutes, to stabilize internal engine generator temperatures.

Do not stop the engine/generator immediately

!after running under load. This can overheat and damage the engine and/or generator.

3.Press and hold the Start/Stop switch in the STOP position, until the engine shuts off.

2.6APPLYING LOADS TO GENERATOR

When applying electrical loads to the generator, observe these guidelines:

•Before applying electrical loads, let the generator stabilize and warm up for a minute or two.

•DO NOT overload the generator.

◆2.6.2 DO NOT OVERLOAD THE GENERATOR

Read the rated wattage/amperage capacity of the gen- erator on the generator data decal located below the user control panel.

Applying electrical loads in excess of the unit’s rated capacity may trip the line breaker or cause the engine/generator to shut down.

To avoid overloading, add up the wattage of all con- nected electrical lighting, appliance, tool, and motor loads. This total should not be greater than the gen- erator’s rated wattage capacity.

•Most lighting, appliance, tool, and motor loads indicate their required watts on their nameplate or data plate. For light bulbs, simply note the wattage rating of the bulb.

•If a load does not show its rated wattage, multiply that load’s rated VOLTS times AMPS to obtain

WATTS.

•Induction-type motors (such as, those that run the vehicle’s furnace fan, refrigerator, air conditioner, etc.) need about 2-1/2 time more watts of power for starting than for running (for a few seconds during motor starting). Be sure to allow for this when con- necting electrical loads to the generator. First, cal- culate the watts needed to start electric motors in the system. To that figure, add the running wattages of other items that will be operated by the generator.

•For the first two or three hours of operation, do not apply electrical loads over 75 percent of the unit’s rating.

2.7PROTECTION SYSTEMS

The engine has several safety switches that cause it to automatically shut down, under the following conditions: low oil pressure, high coolant tempera- ture, and engine overspeed. See Figure 2.2 for the location of these devices. If automatic shutdown does occur, refer to “Troubleshooting Guide”.

◆2.6.1 LETTING THE ENGINE STABILIZE

The generator supplies correctly rated voltage only at the proper governed speed. Some electrical appli- ances may be extremely sensitive to voltage. Incorrect voltages can damage such appliances.

Electrical loads applied on the engine at reduced operating speeds, such loads imposed on the engine, when sufficient power is not available, may shorten engine life. Never turn ON electrical loads until after the generator engine has started and stabilized at no- load.

◆2.7.1 LOW OIL PRESSURE SWITCH

This switch is normally closed (N.C.) but is held open by engine oil pressure during engine running. Should operating oil pressure drop below approximately 10 psi, the switch contacts close, and the engine shuts down automatically.

◆2.7.2 HIGH COOLANT TEMPERATURE SWITCH

This normally-open (N.O.) thermostatic switch has a sensing tip that is immersed in captive coolant. Should the coolant temperature exceed approximate- ly 115° C (240° F), the switch contacts close, and the engine shuts down automatically.

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Contents Liquid-cooled Recreational Vehicle Generator Introduction Authorized Service Dealer LocationTable of Contents Part II Installation InstructionsGeneral Hazards Electrical Hazards Quietpact 75D Generator IdentificationModel Generator AC Connection System SafetySpecifications Generator ApplicabilityEngine Fuel Consumption GAL/HREngine OIL Requirements CoolantBefore Starting the Engine Generator Control PanelOptional Remote START/STOP Starting the Generator Protection Systems Stopping the Generator1 25-HOUR BREAK-IN Period Additional InformationOverspeed Shutdown Overvoltage ProtectionEffects of Moisture and Dirt Checking the Engine OIL LevelChanging the Engine OIL AND/OR OIL Filter Operation in High Grass or BrushSpark Arrestor Muffler Servicing the Engine AIR FilterBattery Maintenance Cleaning the GeneratorExercising the Generator Cooling SystemEngine Coolant Drive BeltReturn to Service OUT-OF-SERVICE ProcedureRemoval from Service Service Schedule 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 Construction Generator CompartmentsGenerator Restraint Acoustics Sound Insulating MaterialsTypical Noise Abatement 2.2.4 Compartment Floor Cutouts Generator Airflow Cooling and Ventilating AIRCooling AIR Inlet Openings Compensating for Restrictions Testing the InstallationDiesel Fuel System Generator Fuel Return Lines Fuel TankGenerator Fuel Supply Lines Muffler and Spark Arrestor Exhaust System SafetyExhaust System Generator AC Connections WiringElectrical Connections Electrical Junction BOXVolts Only Dual Circuits Generator Coversion toConduit Power Supply CordIsolating Different Power Sources Battery Cable Connections Battery InstallationRecommended Battery Battery CablesRemote START/STOP Connections Optional AccessoriesBattery Compartment Initial Start Post Installation TestsTesting Under Load Before Initial StartupInstallation Checklist Problem Cause Correction Troubleshooting GuideAppendix 2 Notes Appendix 2 Notes Appendix 3 Electrical Data Appendix 3 Electrical Data Appendix 3 Electrical Data Wiring Diagram 120 VAC- Drawing No. 0D2793-B Part Part NO. QTY Description 677mm Item Part NO. QTY. Description 0C4554 Shaft, Fan 0C4845 Gasket, Electrical Enclosure Divider Exhaust Gasket 0C6946A Fuel Pump Assembly 023484F Snap Bushing 052219 2118 11 29 32 33 Camshaft Assembly Complete Cylinder Block Cylinder Head Assembly Crankshaft Assembly Idler Gear Assembly Rocker ARM Assemblyincludes ALL Components Shown below Injector Pump Assembly Fuel Filter Support HOUSING, Timing Gear OIL PAN Water Pump Assembly Appendix 5 Notes Parts Covered Federal and California Emissions Control Warranty StatementYour Warranty Rights and Obligations Manufacturers Warranty CoverageLimitations Obtaining Warranty ServiceObligations and Rights of the Manufacturer and Owner Warranty Schedule CONSUMER/PERSONAL Applications

004270-2 specifications

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