Starting the Generator Set
Start the generato
r set from the
generator set control panel or the rem
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1.
2.
Push and hold the switch at START until the generator set starts. The status
indicator light on the switch flashes during preheat and cranking. The preheat
period may take up to 15 seconds before cranking begins. The status indicator will
stay on continuousl
y when the starter disconnects, indicating that the generator
set is running.
Excessive cranking can overheat and damage the starter motor. The generator set
will automatically stop cranking if it does not start within a set time. Wait at least 2
minutes before trying again. Refer to the troubleshooting guide in the Operator
Manual if the generator set does not start after the required number of attempts.
3. For top performance and engine life, let the engine warm up for 2 minutes before
applying the load.
4. Check for fuel, oil and exhaust leaks at the generator set. If leaks are found, s
top
the generator set immediately and have it serviced.
Vapor Tightness and Exhaust Tailpipe Endings
(Diesel, Gasoline, and LP Exhaust)
If the generator set is mounted in a compartment on the floor of the vehicle, the entire
compartment (except the floor) must be lined with vapor and fire resistive materials. All
seams and openings in the barriers for wiring, mounting screws and so forth must be
sealed. Use approved materials, see NFPA 1192 for details.
The generator set exhaust system must be gas-tight and designed to prevent entry of
exhaust gases into the vehicle interior. Do not terminate the tailpipe underneath the
vehicle. Extend it a minimum of 1 inch (25 mm) beyond the perimeter of the vehicle. Do
not terminate the tailpipe underneath a slide-out room, unless the bottom of the slide-out,
including skirts and moldings, is at least 3 feet above the end of the tailpipe. Also, do not
terminate the exhaust tailpipe underneath the oil drain or such that it will restrict the air
outlet.
Fuel Line Requirements
The generator set must never be connected to the fuel supply line of the vehicle engine. To
prevent the generator set from running the vehicle out of fuel, do not extend the generator
set fuel pickup tube down into the fuel tank as far as the pickup tube for the vehicle
engine. Fuel lines must be secured, free of leaks, and separated or shielded from electrical
wiring and engine exhaust components. Federal standards for vehicle fuel tanks may
require the installation of an automatic shutoff valve at the generator set fuel tank pickup
to prevent leakage in the event of a roll-over.
Inspecting fuel Lines
Check for leaks by priming the fuel system in accordance with the generator operator
manual. Fix all leaks before starting the generator.
Enclosure and Chassis
The generator set controls and electrical connections are contained within an enclosure to
prevent damage. The enclosure, chassis, and muffler systems are designed to reduce noise
and vibration. Do not operate the generator set without the enclosure.
Fuel Consumption and Battery Requirements
Fuel consumption will vary depending on the fuel type and model of the generator set.
Cummins recommends a generator set starting battery of 600 Cold Cranking Amps. Access
the specific generator set model operating Instructions for fuel consumption and battery
requirements.
Status of the Neutral Conductor
Neutral conductor bonded to frame (NEUTRE MIS A LA MASSE AU CHASSIS) unless
modified by or according to customer’s requirements.
Compartment Ventilation and Clearance Requirements
Ground clearance of at least 12 inches (305 mm) is recommended to reduce dust pulled in
by the cooling fan and airflow blocked by external objects. Proper clearances must be
provided to the generator set within the generator set compartment. Detailed generator
set clearance information can be found in the generator set Installation Manual or the
following table.
Page 3 Page 4
Copyright © 2020 Cummins Inc. Copyright © 2020 Cummins Inc.
Stopping the Generator Set
Turn off the air conditioner and other large appliances. Let the generator set run for 2
minutes to cool down, then press the STOP switch to stop the generator set.
Breaking in a New Generator Set
Proper engine break-in on a new generator set or one with a rebuilt engine is essential for
top engine performance and acceptable oil consumption. Run the generator set at
approximately ½ rated power for the first 2 hours and then at ¾ rated power for 2 more
hours. The oil and filter should be changed after the first 20 - 50 hours of run time,
depending on the generator set model. Refer to the Operator’s manual for specifications.
Loading the Generator Set
The generator set can power various appliances like AC motors, air conditioners, AC/DC
converters, etc. The amount of load that can be applied depends upon the generator set
power rating. The generator set will shut down or its circuit breakers will trip if the sum of
the loads exceeds the rated generator set power.
Connecting to Utility/Shore Power
When the vehicle has provisions for connecting to utility power, such as a cord for
plugging into a power outlet receptacle, it must also have an approved device to keep the
generator set and utility from being interconnected. See the generator set Operator
Manual for more information regarding operating with utility power.
Muffler
The muffler is mounted inside the generator housing. It has a USDA (Forest Service) spark
arrestor and meets RVIA EGS-1 construction requirements.
Weight
In general, fixed mount Cummins RV generator sets weigh more than 110 pounds (50kg)
and require approved lifting equipment to be handled.
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