MBW V.E.U. - Manual (Page 7)

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O
PERATION
Introduction
This parts manual contains only standard parts. Variations
of these parts as well as other special parts are not included.
Contact your local MBW distributor for assistance in
identifying parts not included in this manual.
Before Starting & Operating
• Operating VEU creates a possible source of ignition for
flammable gas plume. BE CERTAIN ATMOSPHERE IS
SAFE BEFORE OPERATING THIS MACHINE!
• REMEMBER! It is the owner’s responsibility to
communicate information on the safe use and proper
operation of this unit to the operators.
• Review ALL of the Safety Precautions listed on page 1 of
this manual.
• Familiarize yourself with the operation of the machine
and confirm that all controls function properly.
• Know how to STOP the machine in case of an
emergency.
• Make sure hands, feet, and clothing are at a safe
distance from any moving parts or high suction areas.
• OIL LEVEL - Check the oil level in the engine. For more
information see “Lubrication” under the respective
engine’s “Owners Manual” or the Maintenance section of
this manual.
• ENGINE AIR CLEANER - Check to ensure element is in
good condition and properly installed.
• BLOWER AIR CLEANER - Check to ensure element is
in good condition and properly installed
• FUEL SUPPLY - The engines on MBW equipment
require an automotive grade of clean, fresh, diesel fuel.
• FUEL FILTER - If clogged or damaged, replace.
• GAS SENSOR - Be familiar with operation of gas sensor.
Refer to sensor manual. Be certain that the sensor has
been calibrated and is in working order. MBW
recommends the sensor be calibrated at least every 3
months.
Assembling Probes
1. Place probes into ground
2. Connect probes to VEU with hose assemblies.
Note: The MBW VEU probes can be connected to the
VEU in many ways. Each utility should develop
their own best practice to make the connections.
To avoid a significant pressure drop, MBW
recommends not connecting more then 6 (six)
probes to a single 1-1/2” branch hose. If more
probes are desired, they should be connected to a
new branch line coming off the VEU.
3. Open all valves on VEU probes.
4. Cap all open hose ends with CAM-Loc plugs/caps.
5. Close unused manifold valves on VEU.
6. Fully open Air-Bypass valve before starting engine.
Starting Engine
For detailed instructions refer to the engine “Owner’s
Manual”.
WARNING
Ensure gas concentration in work area is safe for
open ignition sources. DO NOT use machine in
areas that are unsafe.
1. Plug sensor/vacuum combo plug into socket on
canister housing.
Note: Engine will NOT run without sensor plugged in.
2. When power is supplied to the sensor stand
assembly the sensor will start a warm up cycle. This
cycle will take approximately 4 minutes and
engine will NOT RUN until the “Wait to Start” light
turns off.
3. Open bypass valve fully, close all vacuum supply
valves on canister, open valves on probes.
4. Turn key switch to “ON”.
5. Press glow plug button if engine is cold. Glow plugs
will cycle eash time button is pressed.
6. Press engine start button to engage starter.
7. Allow engine to warm up for one or two minutes.
Operating
1. Ensure proper operation of gas sensor.
2. Run engine speed up to approximately 30%.
3. While watching LEL percent on sensor or bar graph
on control panel, slowly begin opening vacuum
supply valve.