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General| Brand | Onan |
|---|---|
| Model | EM Series |
| Category | Portable Generator |
| Language | English |
Manual introduces EK/EM series electric generating sets, engine and generator details.
Guide to identifying generator set model and specification numbers from the nameplate.
General safety rules for operating and maintaining the generating set and surrounding area.
Precautions for handling fuel, preventing fires, and ensuring safe fuel system operation.
Safety considerations for the exhaust system, including toxic gases and proper ventilation.
Safety measures for managing pressurized coolant systems and avoiding burns.
Safety measures for maintaining proper airflow and preventing overheating in ventilation systems.
Precautions for working with electrical components, wiring, and battery connections.
Engine manufacturer, series, displacement, bore, stroke, fuel type, battery voltage, and starting method.
Generator type, ratings, voltage regulation, and speed specifications.
Capacities for cooling system, oil, and exhaust connection specifications.
Required airflow for engine combustion, radiator cooling, and alternator cooling.
Physical dimensions (height, width, length) and approximate weight of the generator set.
Description of the EK/EM series generating set as a complete unit with engine and generator.
Information on the Ford engine and the ONAN Type UR AC generator, including operation principles.
Description of standard instruments like oil pressure, water temperature gauges, and switches.
Description of optional controls and indicators, including warning lights and meters.
Connection point for changing generator reference voltage for different output voltages.
Details on solid-state voltage regulator units (Begin Spec F and Prior to Spec F).
Functions of engine monitor modules, including cranking, oil pressure, and temperature alarms.
Module limiting engine cranking time and providing fault indication on failure to start.
Optional modules like Cycle Cranker for automatic start sequences and Pre-Alarm for early warnings.
Location and function of oil pressure and temperature sensors and their role in monitoring and shutdown.
General considerations for installation, including local codes and specific requirements like mounting surface.
Guidance on selecting a suitable location and proper mounting techniques for vibration isolation.
Requirements for proper airflow and heat removal for indoor and outdoor installations.
Description of the standard radiator and fan cooling system for the generator set.
Details on the optional heat exchanger cooling system, its operation, and limitations.
Description of optional standpipe and remote radiator cooling systems and their features.
Information on the optional water jacket heater for maintaining engine coolant temperature.
Explanation of the direct flow water cooling system, including pressure and flow control.
Instructions for connecting heat exchanger, standpipe, and remote radiator cooling systems.
Guidelines for routing exhaust pipes, preventing condensation, and ensuring safe installation.
Details on fuel types, connection regulations, and natural/LPG gas pressure requirements.
Battery specifications, connection, and maintenance for ensuring reliable starting.
Instructions for connecting remote starting switches and considerations for wire gauge and distance.
Guidelines for electrical connections, wiring sizes, grounding, and transfer switch usage.
Initial checks, fluid levels, battery status, and fuel system readiness before starting.
Lubrication, cooling, fuel, and battery checks required before initial engine startup.
Step-by-step instructions for starting, running, and shutting down the generator set.
Guidelines for minimizing no-load operation and the importance of regular exercise periods.
Procedures for protecting the generator set from rust and corrosion during storage.
Steps to follow when bringing a generator set back into service after storage.
Method for diluting battery electrolyte to prolong life in hot environments.
Recommended maintenance tasks based on operating hours and environmental factors.
Procedures for cleaning or replacing air filters and changing engine oil filters.
Instructions for cleaning the PCV valve during oil changes.
Steps for adjusting gasoline and combination carburetors for optimal engine performance.
Information on gas carburetors and availability of LPG conversion kits.
Details on adjusting the electric choke and the function of the anti-dieseling control.
Procedures for adjusting governor speed, linkage, and sensitivity for accurate output frequency.
Adjusting engine sensitivity, general settings, and checking AC output voltage.
Setting the throttle stop lever and adjusting the anti-dieseling control for proper stopping.
Instructions for adjusting drive belts for the fan, governor, and alternator.
Recommended specifications for spark plug gap, ignition points, and valve clearance.
Periodic visual inspection of fuel, exhaust, water lines, and electrical connections for leaks and security.
Maintenance for the AC generator, including inspection of components and generator bearing replacement intervals.
Procedures for ordering Onan and Ford parts, including required information like model and serial numbers.
Table correlating model and spec numbers with electrical data and parts key numbers.
Illustrated parts list for the cooling, oil drain, and exhaust systems.
Illustrated parts list for governor, alternator, and ignition coil assemblies.
Illustrated parts list for the anti-dieseling control system components.
Illustrated parts list for the optional air heater group used for carburetor preheating.
Illustrated parts list for the optional day tank system used for fuel replenishment.
Illustrated parts list for the gasoline fuel system, including carburetor and fuel lines.
Illustrated parts list for the optional liquid petroleum gas (LPG) fuel system.
Illustrated parts list for optional combined gas and gasoline fuel systems.
Illustrated parts list for the generator assembly, including rotor, stator, and housing.
Illustrated parts list for the voltage regulator assembly, including rectifiers and heat sinks.
Illustrated parts list for chassis, panels, doors, battery tray, and housing components.
Illustrated parts list for engine control panel instruments like gauges, switches, and lamps.
Illustrated parts list for AC output control components, including meters, transformers, and circuit boards.
Illustrated parts list for the exciter rotor assembly, including heat sinks and rectifiers.
Illustrated parts list for the AC printed circuit board, including resistors, capacitors, and transistors.
Illustrated parts list for the mounted fuel tank assembly, including straps and valves.
Illustrated parts list for the unhoused city water cooling installation.
Illustrated parts list for the optional water jacket heater installation.
Illustrated parts list for the optional standpipe cooling installation.
Illustrated parts list for the optional engine heater installation.
Illustrated parts list for optional standpipe cooling with Marsh regulator.
Illustrated parts list for the optional heat exchanger installation.
Illustrated parts list for the optional top mounted exhaust muffler installation.
Illustrated parts list for the optional water cooled manifold installation.
Illustrated parts list for optional city water cooled manifold installation.
Illustrated parts list for standard 12-volt engine control monitor group.
Illustrated parts list for Penn State 12-volt engine control monitor group with one fault light.
Illustrated parts list for optional 12-volt engine control monitor with five fault lights.
Cross-reference for specific parts for Pennsylvania approved EK/EM generator sets.
Warranty periods based on product application type and purchase date.
Details on labor coverage for removal, reinstallation, travel time, and mileage for warranty repairs.
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