RVMP Flex Power RVMP-OEM-4L1-RV401 User manual

INSTALLATION MANUAL
RVMP®Flex PowerTM
4.0kW Dual Fuel Installed Generator
For Models:
RVMP-OEM-4L1-RV401 and RVMP-AM-4L1-RV401
(Picture shown here is for reference only)
Authorized for Installation ONLY in Recreational Vehicles Prepped by the RV Manufacturer
With Fuel Lines and a Compartment for Permanent Generator Installs.
Do NOT Install in Any Other Application.
Visit rvmp.co • Copyright© 2022 RV Mobile Power, LLC. - All Rights Reserved.
Read this manual carefully before operation.
This manual includes important guidance for safety operation.

TABLE OF CONTENTS
1.0 Safety___________________________________________________________________2
2.0 Installation Standards and Codes_________________________________________4
3.0 Generator Dimensions___________________________________________________6
3.1 Hanging Frame Dimensions________________________________________7
4.0 Lifting and Handling Generator___________________________________________8
5.0 Location, Mounting, and Ventilation______________________________________9
6.0 Exhaust_________________________________________________________________12
7.0 Propane_________________________________________________________________17
7.1 Gasoline__________________________________________________________19
7.2 Gasoline Vapor____________________________________________________21
8.0 Electrical Connections___________________________________________________22
8.1 Battery Connections and Grounding________________________________24
8.2 Wiring Diagram____________________________________________________25
8.3 Electrical Wiring For Remote Control Functions_____________________28
9.0 Install Checklist and Startup______________________________________________29
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1.0 SAFETY
Read and understand all instructions before installing or operating this product. Adhere to all safety
labels. This manual provides general instructions. Many variables can change the circumstances of the
instructions, i.e., the degree of difficulty, existing equipment, operation and ability of the individual
performing the instructions. Failure to correctly follow the provided instructions may result in death,
serious personal injury, severe product and/or property damage and may void portions of the warranty
(See Owner’s Manual for warranty info). We recommend that installation is performed by a qualified
and experienced RV technician.
This manual cannot provide instructions for every possible scenario, but provides the general
instructions, as necessary, for effectively installing and using the generator in most situations. If you
have any questions, please contact us at:
RV Mobile Power, LLC
Phone: (855) HAPPYRV
Email: [e-mail]
www.rvmp.co
FIRE SAFETY NOTICE
Keep multi-class ABC fire extinguishers handy. Class A fires involve ordinary combustible materials such
as wood and cloth. Class B fires involve combustible and flammable liquid fuels and gaseous fuels. Class C
fires involve live electrical equipment.
WARNING
The "WARNING" symbol above is a sign that a procedure has a safety risk involved and may cause death or
serious personal injury if not performed safely and within the parameters set forth in this manual.
●Failure to follow instructions provided in this manual may result in death, serious
personal injury and/or severe product and property damage, including voiding all
or portions of the warranty.
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●Do not operate equipment when mentally or physically fatigued or after
consuming alcohol or drugs.
●Do not use starting fluids which can cause an explosion and may result in death,
serious personal injury and/or severe product and property damage. Do not use
evaporative starting fluids. They are highly explosive.
●Installing or maintaining a generator can cause severe personal injury. Wear
personal protective equipment including safety glasses, hard hats, steel-toed
shoes and protective clothing when working on equipment.
●Benzene, found in some fuels, and used engine oils have been identified by some
state and federal authorities to cause cancer or reproductive toxicity. Do not
ingest, breathe fumes or come into contact with gas or oil when checking,
draining or adding gas and oil.
●Hot, moving and electrically-live parts can result in death, serious personal injury
and/or severe product and property damage. Only trained and experienced
personnel should make adjustments while the generator is running. Otherwise,
adjustments should be made only when the generator is not running.
●Moving parts can catch on loose clothing items or jewelry. Do not wear loose
clothing or jewelry near moving parts including shafts, fans, belts and pulleys.
●Moving parts can seriously injure body appendages, including fingers. Keep
hands away from moving parts. Keep protective guards in place over fans, belts,
pulleys and other moving parts.
●Improperly installed electrical connections may result in death, serious personal
injury and/ or severe product and property damage. Electrical connections must
be made by trained and experienced electricians in accordance with applicable
codes.
●Back-feeding to shore power may result in death, serious personal injury and/or
severe product and property damage. The generator must not be connected to
shorepower or any other source of electrical power. An approved switching
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device must be used to prevent interconnections and serious damage to the
generator.
●Operating, servicing and maintaining and maintaining this equipment can expose
you to chemicals, including engine exhaust, carbon monoxide, phthalates and
lead, which are known to the State of California to cause cancer and birth defects
or other reproductive harm. To minimize exposure, avoid breathing exhaust, do
not idle the engine except as necessary, service your equipment in a
well-ventilated area and wear gloves or wash your hands.
●Do not install generator on a watercraft or boat. Such an installation might violate
U.S. Coast Guard regulations and may lead to damage, fire, injury, or death.
CAUTION
The "CAUTION" symbol above is a sign that a procedure has a safety risk involved and may cause personal
injury, product or property damage if not performed safely and within parameters set forth in this manual.
●Always wear eye protection when performing service, maintenance or installation
procedures. Other safety equipment to consider would be hearing protection,
gloves and possibly a full face shield, depending on the nature of the task.
2.0 INSTALLATION STANDARDS AND CODES
This generator meets the standard for Safety for Engine Generator Sets for Recreational Vehicles,
ANSI/RVIA EGS-1. It is highly recommended that this generator be installed by a trained and certified
installer with experience in RV generators.
The generator must be installed according to the following standards, as well as any local, state and
federal standards. Due to the ever changing nature of standards, it is the responsibility of the installer to
have the current editions of these and other relevant standards.
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National Fire Protection Association
470 Atlantic Avenue
Boston, MA 02210
●NFPA No. 70, Article 551 - Recreational Vehicles and RV Parks
●NFPA No. 58 - Liquified Petroleum Gas Code
●NFPA No. 1192 - Fire & Life Safety
●NFPA No. 501C (ANSI A119.2) - Recreational Vehicles
California Administrative Code—Title25, Chapter 3
State of California Documents Section
P.O. Box 1015
North Highlands, CA 95660
●CSA Electrical Bulletin 946 - Requirements for Internal Combustion Engine-Driven Electric
Generators for Use in Recreational Vehicles
Other possibly applicable standards for consideration:
ANSI A119.2
ANSI/RVIA-EGS-1
FMVSS 301
Recreational Vehicle Industry Association
14650 Lee Road
Chantily, VA 22021
CAN/CSA-Z240
Recreational Vehicles Bulletin 946
Canadian Standards Association
Housing and Construction Materials Section
178 Rexdale Blvd.
Rexdale, Ontario, Canada M9W 1R3
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3.0 GENERATOR DIMENSIONS (WITHOUT FRAME)
6

3.1 HANGING FRAME DIMENSIONS
7

4.0 LIFTING AND HANDLING GENERATOR
When lifting a generator without a mounting frame, the generator should only be lifted from the
bottom. The generator should never be lifted by the housing. A solid surface, a pair of forks, or a pair of
straps can be placed underneath the generator to properly lift from the bottom. Care should be taken to
ensure that the generator is held horizontally during handling and is not tipped which could spill oil. Care
should also be taken to ensure that no fork or strap contacts the exhaust outlet on the bottom of the
generator, as this contact during lifting/moving could bend or break connections in the muffler and
exhaust system. Further care should be taken during handling to ensure that fuel/LP lines are not
pinched or crushed.
When lifting a generator with a mounting frame, the generator can be lifted either by A) the upper
frame where the mounting holes are located or (B) from the bottom.
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5.0 LOCATION, MOUNTING, AND VENTILATION
This generator is designed to be installed into or onto a vehicle and must be securely mounted to the
vehicle. It has to be installed in an area safe from road debris and must be guarded in such a way that
the vehicle cannot be damaged by heat or vapors. The generator has to have exhaust, fuel, and
electrical all installed correctly to safely function. A proper location must include all of the following:
●Enough space based on the generator dimensions shown above.
●Enough space to connect and disconnect fuel lines, a remote control wiring harness, and AC
power output lines.
●Enough space to access the front control panel for starting/stopping the generator and
performing all periodic maintenance.
●Separation from any flammable vapors or liquids, including fuel tanks and batteries, to prevent
the generator from igniting these substances.
●Access to the bottom of the generator for draining oil, changing the oil filter, and installing
exhaust.
●Ground clearance of at least 12 inches.
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●Space above the generator and to the sides for adequate cooling air flow.
WARNING
Supporting structure must be strong enough to hold and secure the generator. Insufficient structure
may cause damage to the vehicle or the generator may become detached from the vehicle causing
serious damage, injury, or death.
The generator weighs approximately 117lbs with oil and must be installed in a location that can support
the weight of the generator, as well as the motion of the generator and the added forces of the generator
when traveling (approx +/-1G Force vertical and +/-3G Force horizontal).
Mounting of the generator will be dependent on the design of the structure, but fasteners should not
intrude into the generator more than required. If installed near wheels, install guarding to protect the
generator from debris.
When mounting on a floor, secure the generator to the floor with bolts through the bottom housing. The
generator must be installed in a vapor tight 26GA or greater enclosure to prevent both fire and vapors from
getting into 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, etc must be
sealed. Appropriate materials must be used (26 gauge steel or equivalent). See NFPA 1192 for more
information. If the floor is of a combustible material, such as wood, the compartment and door must be
lined with ¼ to ½ inch thick, 4 lb/ft3density fiberglass thermal insulation with aluminum foil facing at least
0.001 inch thick. Secure the insulation every 12 inches to the surfaces being protected by mechanical
fasteners with washers at least 1 inch in diameter.
When hanging below a floor, use a hanging frame to hang the generator from above. Barriers to vapor
and fire must be placed between the generator and the floor. A 26GA fire barrier must be installed to
protect the floor. If the floor is plywood, steel must be used to reinforce the mechanical support for the
generator. When hanging, the generator must not be in the approach or departure angles of the vehicle
and must be above the axle line.
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Acoustic and/or thermal insulation may be used but must be self-extinguishing at 200 degrees F and
do not place these materials below the generator as they can absorb fuel and oil. All fuel and electrical
lines must be properly protected when routing so that they cannot be cut on raw metal. Any and all
openings must be sealed to prevent vapors from entering the vehicle.
When positioned within a closed compartment, the compartment must be vented with fresh air and
there must be a minimum of 40in2of fresh air vented into the compartment in order to keep the generator
cool. Preferably the compartment vents are positioned away from the exhaust opening at the bottom of
the generator (the opening which also holds the muffler). These compartment vents cannot be restricted
and if a mesh or grill is used, it must be properly sized depending on the vent openings. The higher the
location of the vent is preferable, so that road debris and or dirt is not pulled into the compartment.
Unless the compartment vents line up with the generator cold air inlets, add an additional 1.5 inches of
space in front of the generator cold air inlets to ensure proper ingress of cold air.
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6.0 EXHAUST
WARNING
EXHAUST GAS IS HOT AND DEADLY. Never inhale exhaust gas. Always route exhaust pipes outside
of the vehicle and terminate the tailpipe at the appropropriate location. Use only approved materials
for exhaust pipe and always use proper clamps and hangers and ensure that there are no leaks.
Never mount the exhaust where it could be damaged or punctured.
WARNING
DO NOT MODIFY MUFFLER. Modification or alteration to the muffler will void the US Forest Service
approval of the muffler. A fire can be started when using a generator without a proper spark
arresting exhaust system. The person making any modification or knowingly using a modified muffler
is liable for any warranty, injury, or damage caused by a modified muffler.
When installing the exhaust system, use ridgid 18 gauge steel or greater with 1.25” OD (muffler outlet is
1.13” OD):
1. Cut a hole (if necessary) into the floor beneath the outlet of the muffler, located on the bottom side
of the generator.
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2. Connect one or more vertical pipes to the outlet of the muffler, running downward vertically through
the hole. Use only proper U-bolt exhaust clamps to connect to the muffler outlet and any additional
pipes.
3. Connect a 90 degree elbow pipe to the vertical pipe(s), again using proper U-bolt exhaust clamps
only.
4. Connect a series of horizontal pipes to route the exhaust to the nearest periphery of the vehicle,
again using proper U-bolt exhaust clamps only. Ensure that the tail pipe extends beyond the body
perimeter of the vehicle.
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5. Ensure that the tail pipe extends far enough away so that exhaust gas cannot be trapped beneath
the vehicle, at least 1 inch beyond the perimeter of the vehicle. See the figure below for measuring
the body perimeter of curved vehicles, as well as NFPA 1192 Section 6.4.3 for more details. “Line
A” provides a line beyond which the exhaust termination opening must extend to satisfy the
standard and this is determined by drawing a vertical line through the tangent point determined by
“Line B.” Whereas “Line B” is determined by projecting a 45 degree angle from the horizontal
plane created by the ground to where it is tangent to the vehicle wall surface.
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6. Ensure adequate road clearance so that the exhaust cannot be damaged by road bumps or deflation
of tires. The road clearance for areas that are not found between the wheels of the vehicle can be
measured by establishing a front and rear wheel departure line, which is a straight line from the
front and rear tire-road interface to the front and rear bumper respectively. See Figure below. All
exhaust pipes should be placed as high above this line as possible.
7. Install skid bars to provide additional protected area for exhaust pipe (if necessary).
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8. Ensure that no unsealed air passage into the vehicle is located within 6 inches of the exhaust pipe
termination. This includes but is not limited to: 1) power cord hatches that have an air passage to
interior, 2) windows, 3) city water fill that has a communicable air passage, 4) storage
compartment doors where the compartment is not sealed to the interior and 5) entry doors.
However, unventilated compartment doors that are sealed with sealing materials (gaskets, foam
tape, or equivalent) are not considered openings, and therefore are exempt from this requirement.
See figure below. “Door A” requires the entire compartment to be sealed vapor-tight to the interior
of the vehicle. “Door B” does not require the compartment to be sealed vapor-tight to the interior
of the vehicle.
9. The exhaust may terminate beneath a slide out only if the slide out is at least 36 inches vertically
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away from the exhaust, measured from the exhaust to the bottom of the slide out. However, the
exhaust termination cannot be placed below a slide out that is less than 36 inches vertically from
the exhaust termination.
10.Support the exhaust pipe at least every 3 feet with proper exhaust hangers and ensure a slight
downward slope in the horizontal pipes (¼ inch for every 3 feet) to allow drainage out of the end of
the exhaust pipe. Place an exhaust hanger as close to the exhaust pipe termination as possible.
11.Seal any holes created for the vertical pipe(s).
12.Do not route exhaust near fuel lines or other combustible materials.
13.Do not leave exhaust termination upturned to collect moisture.
14.Do not use flexible exhaust pipe.
15.Do not connect the generator exhaust to the exhaust for the vehicle or any other exhaust.
Exhaust Recirculation Test
It is recommended to check that the generator is not recirculating the exhaust gases or the hot air off the
engine after installation. After the generator has been completely installed, in an outdoor space without
wind and relative temperature, run the generator for an hour with all of the doors and cabinets shut and
the exhaust vented as designed. Place a medium load demand (15-25Amp) during this time. Using a
thermocouple measure the air at the inlet fan on the side of the generator. The temperature should level
out within the hour. If the temperature does not level out, but instead continues to increase and increase,
check to see if the exhaust is correctly vented away or there is enough inlet air being brought in.
7.0 PROPANE CONNECTIONS
WARNING
Propane gas (LP gas) can cause asphyxiation, and is highly flammable and combustible. Propane
gas can cause injury, damage, or death if improperly handled. Never handle around fire, sparks, or
any other ignition source. Never route any propane lines near electrical wiring or heat producing
components. Always keep fire prevention equipment on hand when working with propane. Be aware
17

of and trained on the various dangers of working with propane gas. Correct procedure is laid out in
NFPA 58, Sect. 1.6. It is recommended that all work on the propane system is done by experienced
and qualified personnel.
WARNING
Over pressurization of the propane system can cause damage to the equipment and will hinder the
ability to seal the system. This can cause leaks and potentially asphyxiation, fire, damage, and
death. If the fuel system is improperly sized, flameout can be caused, leading to leaking of propane
and fire, asphyxiation, damage, and death. The system must be properly designed to prevent this.
Improper testing of fuel system can lead to ignition of propane, causing fire, damage, and death. A
person properly trained to adjust the system is required if the propane system needs any
modification.
The propane system should be plumbed in seamless steel piping with flared ends. Use the following sizes
according to length for determining proper pipe size.
PIPE SIZE
MAX LENGTH
⅜” ID
3 FT
½” ID
15 FT
Flexible hoses should only be used at the generator and at the propane tank to make connections. Use
only low permeation fuel hoses rated for propane. Attach the flexible hose to the generator propane
inlet using a ½” female 45 degree flare fitting (generator attachment is a male ½” 45 degree flare
fitting).
Do not combine or split the generator fuel line with a propane fuel supply line that is already supplying
another appliance, as the generator will starve out the rest of the system, due to its large draw with large
demands. The propane system needs to be designed to properly supply the appliances and generator
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under normal operations and conditions, which may demand split systems.
The generator demands a gas pressure range of 9-13 in (229-330mm) water column. Pressure must not
exceed this range or could cause damage. Use only with tanks having a manual shutoff valve as well as a
two stage pressure regulator.
The propane system must be installed using the Standard for Storage and Handling of Liquified Petroleum
Gases (NFPA No. 58) as a governing document. The system should be thoroughly checked for leaks after
installation and only with approved methods such as soapy water. Every part of the fuel system and all
connections should be tested in this manner.
Although properly set up when installed, the propane system may need to be adjusted due to
elevation,temperature, and fuel sources.
7.1 GASOLINE FUEL CONNECTIONS
WARNING
Gasoline vapors can cause asphyxiation or death. Gasoline is highly flammable and combustible and
can cause injury, damage, or death if improperly handled. Never handle around fire, sparks, or any
other ignition source. Never route any gasoline lines near electrical wiring or heat producing
equipment. Always keep fire prevention equipment on hand when working with gasoline. Be aware
of and trained on the various dangers of working with gasoline. It is recommended that all work on
the gasoline system is done by experienced and qualified personnel.
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