Momentum MN 39 Series Operator's Manual

Fuel management module

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OPERATORS MANUAL – MN 39 SERIES

Published June 1, 2017

U-0181-MFT Series MN 39

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Page 1 OPERATORS MANUAL – MN 39 SERIES Published June 1, 2017 U-0181-MFT Series MN 39...
Page 2 Momentum Fuel System MN 39 Series Fuel Management Module Revision 2A 01 Jan 2017...
Page 3 II. Preface This manual is for Stand Alone Fuel Management Modules (FMM) MN 39 Series. Service information is available by calling Momentum at 1-844-CNG-TANK. Indicates a hazardous situation which, if not avoided, DO NOT attempt to fill, defuel, vent, or perform basic will result in death or serious injury.
Page 4 N O T I C E Indicates practices not related to personal injury. The safety alert symbol shall not be used with this signal word. MN 39 Series Stand Alone FMM...
Page 5: Table Of Contents
High Pressure Filter Change Procedure ......31 Fuel Standards ..............14 Cylinder and Fuel System Inspections ......32 Specifications ..............14 Periodic In-Service Inspection Requirements ....32 Components ..............14 Welding and Hot Work Procedures .......33 MN 39 Series Stand Alone FMM...
Page 6 Towing and Lifting............35 Lifting the Vehicle ............35 Towing the Vehicle ............35 Service and Support .............36 Momentum Parts and Service Hotline ......36 Dealer Locator ..............36 Warranty ................. 37 Warranty Procedures ............37 Warranty Statement ............37 MN 39 Series Stand Alone FMM...
Page 7: In Case Of Emergency
In the event of an emergency or the vehicle requires service, shut down the CNG fuel system using the procedure below. Location of Manual Shut-Off Valves (Figure 1) • Red Handle on the Fuel Management Module (FMM) FIGURE 1 – MANUAL SHUT-OFF VALVES MN 39 Series Stand Alone FMM...
Page 8 Pressure Relief Devices (PRDs) lines. This is a safety design so the CNG fuel system PRDs can still activate when the valves are shut off. MN 39 Series Stand Alone FMM...
Page 9 NOTE: Use this method to turn OFF the valve on EACH tank. (Figure 5) FIGURE 4 – CYLINDER MANUAL SHUT-OFF VALVE FIGURE 3 – CYLINDER MANUAL SHUT-OFF VALVE ACCESS COVER FIGURE 5 – CYLINDER MANUAL SHUT-OFF VALVE MN 39 Series Stand Alone FMM...
Page 10: If You Suspect A Fuel Leak
CSA-qualified fuel system inspector before being the refueling process. The odor should quickly dissipate returned to service. when fueling has been completed. 1. Turn the ignition switch OFF, turn the main battery OFF, and set the parking brake. MN 39 Series Stand Alone FMM...
Page 11: If The Vehicle Is On Fire
7. Have the vehicle inspected by a qualified technician to ensure integrity of the CNG fuel system. Qualified 8. Have a qualified Momentum Service Technician service support can be found at www.momentum inspect the fuel system and make any necessary fueltech.com...
Page 12: First Responder Alerts And Procedures
Observe the following warnings when responding to a fire involving a CNG vehicle. Failure to do so can result in serious personal injury or death. MN 39 Series Stand Alone FMM...
Page 13 The amount of fuel will determine how long it takes for the fuel to be vented. On average, it takes 20 minutes to vent out all the gas through the vent system from PRD activation. FIGURE 7 – PRESSUR RELIEF DEVICE MN 39 Series Stand Alone FMM...
Page 14 Once PRDs have activated and gas has stopped venting, it is safe to put water on the system. N O T I C E After the fire is out, allow time for the system to cool before approaching the vehicle. MN 39 Series Stand Alone FMM...
Page 15: Safety
CNG vehicle. Never disregard a understand. Do not perform any procedure for which safety directive. you do not have the specified Momentum Fuel Technologies parts or required tools. Failure to do so can result in serious personal injury, or death.
Page 16: Safety Tips
8. Perform service only in CNG-approved facilities. 9. For any maintenance that may create a spark or flame, follow the Welding and Hot Work Procedures. MN 39 Series Stand Alone FMM...
Page 17: Cng Vehicle Safety Precautions
Failure to do so can result in serious CNG system completely with an inert gas. Failure to personal injury or death. do so can result in a fire or explosion. MN 39 Series Stand Alone FMM...
Page 18: Codes And Compliances
• ANSI/IAS NGV 3.1 Valves, Fittings and Brackets • Canada: CAN/CGA B109, CSA Group • North America: ANSI/AGA NGV 3.1/CGA 12.3 and NGV 12.3-M95 • Compressed Natural Gas and Liquefied Natural Gas, Railroad Commission of Texas January, 2013 MN 39 Series Stand Alone FMM...
Page 19: Introduction
The engine in this vehicle is fueled by a compressed low emissions. These characteristics make CNG an natural gas (CNG) system designed by Momentum Fuel efficient, safe choice for fueling vehicles. Technologies. The system uses the same type of gas used in household appliances such as ovens and dryers.
Page 20: Fuel Standards
Section 3 — Introduction Specifications Momentum Fuel Technologies CNG fuel systems are available in side mount, back-of-cab, or roof mount, refuse One should never detect (smell) gas or hear gas tail mount configurations. Systems may have one or more escaping at any other time besides refueling. If the fuel storage cylinders in varying capacities.
Page 21 Section 3 — Introduction FIGURE 8 – CNG COMPONENTS MN 39 Series Stand Alone FMM...
Page 22 Door Sensor counter-clockwise to open it. The door sensor that is located on the FMM functions as a safety interlock to prevent the vehicle from starting if the FMM access door is open. MN 39 Series Stand Alone FMM...
Page 23 The low pressure filter is used to remove be in the OFF position when operating the vehicle. contaminants and oil from the fuel prior to it entering the engine. See to the engine manufacturer’s recommended instructions for maintenance and replacement. MN 39 Series Stand Alone FMM...
Page 24 In the event of a fire, they are designed to release the fuel stored in the cylinders a safe distance from the vehicle to prevent over-pressurizing the fuel cylinders. When activated, the PRD cannot be closed and will vent all gas. MN 39 Series Stand Alone FMM...
Page 25: Inspection And Operation
Gas leaks – Smell for gas, look for frost or ice, and or wear. listen for hissing noises at joints and components. 3. Check for damage on the cylinder shields and covers. b. Look for external damage to housings and covers. MN 39 Series Stand Alone FMM...
Page 26: Starting The Vehicle
Open the FMM Manual Shut-Off Valve by turning the valve 1/4-turn counter-clockwise. 2. Turn the ignition switch to ON and allow a few seconds delay for the vehicle to start up. MN 39 Series Stand Alone FMM...
Page 27: Fueling The Cng System
Oily or dusty conditions may be an indication of poor fuel quality, DO NOT USE. These conditions should be reported to the station maintenance personnel. MN 39 Series Stand Alone FMM...
Page 28 1. Open the FMM access door. Remove the cap from the 2. Wipe the receptacle with a dry, lint-free cloth. appropriate fueling receptacle. (Figure 9) MN 39 Series Stand Alone FMM...
Page 29 5. Fueling will continue until the cylinder(s) have been filled. The fuel station pump will then shut off automatically. 6. Turn the nozzle valve to the Vent position to release it from the receptacle and remove the fueling nozzle. MN 39 Series Stand Alone FMM...
Page 30: Fast And Slow Fill And Pressure/Temperature Guidelines
CNG is less dense, and therefore does not contain as much energy per unit volume as it would at a lower temperature. Failure to follow the procedures below could in explosion, fire, causing death or serious injury. MN 39 Series Stand Alone FMM...
Page 31: Defueling And Fuel Transfer Guidelines
(including oxygen in the air) from fire. the fuel tank prior to filling it with CNG: 1. Fill the fuel tank with clean, dry, pure nitrogen gas, and equilibrate it to a minimum of 200 psi. MN 39 Series Stand Alone FMM...
Page 32 Only a trained individual should conduct defueling operations Do not vent CNG in enclosed spaces. Breathing CNG can cause asphyxiation; a high pressure stream of CNG can penetrate skin, and a nearby source of ignition could spark an explosion. MN 39 Series Stand Alone FMM...
Page 33: Fuel System Defueling Procedure
3-way defuel valve to Vent position. This will relieve any pressure between the valves and defuel nipple through the muffler. 3. Connect the defueling hose to the defueling nipple. 4. Connect earth ground between the cylinders and the vent system. MN 39 Series Stand Alone FMM...
Page 34: Scheduled Maintenance
36 Months or 36,000 miles, or if involved in any accident Component Inspection 36 Months or 36,000 miles, or if involved in any accident Cylinders 36 Months or 36,000 miles, or if involved in any accident MN 39 Series Stand Alone FMM...
Page 35: Maintenance Part Numbers
(around 30,000 from the secondary filter(s) could be a sign that the miles), but poor fuel quality could reduce this interval primary filter should be changed. significantly. The best way to determine a proper MN 39 Series Stand Alone FMM...
Page 36: Depressurizing Procedure
Once this process is complete, the system will be fully 7. Insert the ignition key and start the engine. depressurized up to the primary solenoid lock-off valve. Pressure may still remain downstream of the solenoid MN 39 Series Stand Alone FMM...
Page 37: High Pressure Filter Drain Procedure
10. Slowly open the FMM Manual Shut-Off Valve. High Pressure Filter Change Procedure 11. Check the high pressure gauge to ensure fuel pressure has returned in the system. 1. Remove the excess fuel in the filter per the depressurization procedure. MN 39 Series Stand Alone FMM...
Page 38: Cylinder And Fuel System Inspections
DETERIORATION”. must condemn the cylinder and remove it from service. Evidence that the cylinders have been inspected can be If you need a replacement sticker, contact Momentum found in one of the following forms: Fuel Technologies @ 1-844-CNG-TANK. 1. A readily visible inspection label on the cylinder.
Page 39: Welding And Hot Work Procedures
If a CNG fuel system component is damaged, do operations. not attempt to repair it. Contact Momentum Fuel Technologies for a replacement part. N O T I C E If any welding or ‘hot work’ (i.e., any work that involves...
Page 40: Cng Decals
The presence of a CNG diamond is an important signal for First Responders (i.e. police, fire fighters) to alert them of a high-pressure gas fuel system. If any of the CNG labels become damaged or lost, contact Momentum to obtain a replacement. MN 39 Series Stand Alone FMM...
Page 41: Towing And Lifting
The fuel system can become damaged, resulting in a leak. Serious personal injury can occur if resulting in a leak. Serious personal injury can occur if the gas is ignited. the gas is ignited. MN 39 Series Stand Alone FMM...
Page 42: Service And Support
To locate Momentum dealers and qualified Momentum Momentum Parts and Service Hotline service technicians, visit our website at www.momentumfueltech.com To obtain Momentum parts and service information, call Momentum Fuel Technologies at 1-844-CNG-TANK. Correspondence Send correspondence by mail to: Momentum Fuel Technologies...
Page 43: Warranty
To file a warranty claim, call Momentum Fuel Technologies at 1-888-686-7278. Warranty Statement Any alteration of the Momentum CNG fuel system or components will void the warranty. Contact Momentum before performing any modifications to the vehicle’s fuel system which may affect coverage.

This manual is also suitable for:

500 series