HNE MFU 50-150 User manual

USER MANUAL
MFU 50-150
Mobile foam unit

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CONTENTS
1Important basic information............................................................................................4
1.1 Content of delivery .................................................................................................4
1.2 Responsibility of the operator.................................................................................5
1.3 Symbols and signal words......................................................................................5
2Safety................................................................................................................................6
2.1 Acting in an emergency..........................................................................................6
2.2 Intended use of the Machine ..................................................................................7
2.3 Operating range and storage..................................................................................7
2.4 Disposal .................................................................................................................7
2.5 Professional repair and maintenance .....................................................................7
2.6 Residual hazards and protective measures............................................................7
2.7 Electrical safety......................................................................................................8
2.8 Emissions...............................................................................................................9
3Design and function ......................................................................................................10
3.1 MFU Description...................................................................................................10
3.2 Front (covers removed)........................................................................................11
3.3 Back cover ...........................................................................................................12
4Delivery, unpacking, transportation.............................................................................13
4.1 Shipping...............................................................................................................13
4.2 Unpacking............................................................................................................13
4.3 Moving and transport............................................................................................13
5Water and operation conditions ...................................................................................14
5.1 Water supply........................................................................................................14
5.2 When mounted stationary… .................................................................................14
5.3 When mounted on vehicles…...............................................................................14
6Installation and initial start-up......................................................................................15
6.1 Mounting ..............................................................................................................15
6.2 Initial start up........................................................................................................16
7Operating........................................................................................................................17
7.1 Control panel overview.........................................................................................17
7.2 Water level control................................................................................................18
7.3 Starting the MFU..................................................................................................18
7.4 Deactivating the MFU...........................................................................................19
7.5 Emergency shutdown...........................................................................................19
7.6 Hose reel..............................................................................................................20
7.7 Foam agent - tank and dosage.............................................................................20
7.8 Turbo jet gun........................................................................................................21
7.9 Jetting operation with (filled) water tank................................................................22
7.10 Jetting operation without water tank .....................................................................22

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8Cleaning the filter and flushing ....................................................................................22
8.1 Cleaning the filter .................................................................................................23
8.2 Flushing ...............................................................................................................23
9Troubleshooting ............................................................................................................24
9.1 Service-Hotline.....................................................................................................24
9.2 Service address....................................................................................................24
9.3 Causes and remedial action.................................................................................24
10 Further troubleshooting................................................................................................25
10.1 Engine fault (Briggs & Stratton Vanguard)............................................................25
10.2 Pressure system...................................................................................................25
10.3 Safety valve and pressure adjustment..................................................................26
10.4 The high-pressure system....................................................................................27
10.5 Electrical troubleshooting .....................................................................................28
11 Maintenance and service ..............................................................................................29
11.1 Safety during maintenance and repair..................................................................29
11.2 Inspection and maintenance schedule..................................................................29
11.3 Maintenance and care after every use..................................................................30
11.4 Monthly inspection................................................................................................30
11.5 Half yearly and yearly inspection..........................................................................30
11.6 Diaphragm pump..................................................................................................31
11.6.1 Oil level...................................................................................................31
11.6.2 Oil change ..............................................................................................32
11.6.3 Pulsation damper....................................................................................32
11.6.4 Reduction gear.......................................................................................33
11.7 Spare parts and consumables..............................................................................34
12 Attachments...................................................................................................................35
12.1 Technical data......................................................................................................35
13 HNE - Contact ................................................................................................................36

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1 Important basic information
Thank you for purchasing a Mobile Foam Unit. To achieve optimum results and operational
reliability, please read this manual carefully before setting the MFU into operation. In case of
questions or technical problems, please contact us.
This manual is an important part of the MFU. Please keep it well with the other supplied
documents, hold it available to users and pass it in case of sale. For additional information
regarding the engine, please refer to the manufacturer’s manual.
In the course of technical improvement, changes to the machine are maybe not included in
this manual yet. Such technical changes are expressly reserved.
No content of this manual shall be reproduced or forwarded to others without our written
permission. All technical specifications and drawings are subject of copyright.
1.1 Content of delivery
Autarkic high performance extinguishing system for jetting water and/or foam, consisting of
the following components:
self-supporting platform and frame
storage tank for foam concentrate
automatically controlled petrol engine
diaphragm pump with gear
push-button function control
semi-automatic hose reel
28 meters hose with turbo gun
Extended delivery (optional):
various water tanks
cable or wireless remote control
LED-floodlights
dust cover
versatile fastening rail system
floating suction filter with tubes

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NOTE
1.2 Responsibility of the operator
This manual refers to the intended use of the device and prevention of damage and risks.
Please keep it available for the operating personnel and read it thoroughly before initial
startup.
In addition, observe the national provisions of your country with regard to accident prevention
and environmental protection.
We assume no liability for injuries, damage or malfunctions, which arise because of defiance
of instructions in this manual.
1.3 Symbols and signal words
Please follow all instructions, hazard symbols and warnings in this manual in the interest of
safety for operators, environment, and device.
Symbol Meaning
Indication of possible dangerous situations. Disregard may result in
damage to the machine and its vicinity and hazard to the operator
and/or other persons.
ATTENTION
This symbol marks all information required for compliance with
policies, regulations and correct execution of works or maintenance
on the machine.
Regard to environmental hazards. Please observe local provisions
for protection of the environment.
Important general information and recommendations regarding
equipment, maintenance, use, etc.
DANGER

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2 Safety
The following chapter is a supplement. Please observe the already existing local accident
prevention regulations and laws of your country.
Basic principles:
Use the MFU only as intended and in perfect technical condition. Observe operating
instructions.
The MFU may only be operated by trained personnel.
Check the operational safety periodically and ensure it by maintenance. Repair any
defects or faults before use.
If any defect or malfunction occurs during operation, stop the MFU immediately and
relieve the whole system of pressure. Restore the technically perfect condition before
restart.
Be extremely cautious, when fighting fire near electrical installations. Set the jet gun
into spray mode and keep as much distance as possible to live parts.
Protect the unattended MFU against unauthorized use by removing the ignition key.
2.1 Acting in an emergency
If the running MFU causes a hazardous situation, immediately press the button
“EMERGENCY STOP” at the control panel. This will shut down the engine and all electrical
components. Actuate the jet gun after standstill to relieve any residual pressure.
DANGER !
See a detailed description of the emergency-stop function at
page 19, section 7.5
ATTENTION
Never unlock the EMERGENCY
STOP button, before the cause of
danger is eliminated!

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2.2 Intended use of the Machine
The MFU (mobile foam unit) is an autarkic high performance extinguishing system for fighting
fires of class A(solids) and B(liquids). It is not suitable to extinguish fires of class D (metal)
or F (fat/grease). Sucking water from external sources is intended solely for firefighting and
refilling of the water tank. Supply the water inlet with cold, clean and pressure-free water (see
chapter 6.1 –Operation conditions). Other liquids must not be used. For any consequences
resulting from other than the intended use, the user is solely responsible and liable.
2.3 Operating range and storage
The temperature range of supplied water is +5 °C to +45 °C. The MFU should be stored only
in horizontal position. The storage place must be free of frost and dust. For longer periods,
we recommend to drain fuel and water and to cover the MFU.
2.4 Disposal
The entire package of the MFU consists of recyclable materials. Qualified personnel should
properly carry out the disposal of used parts and consumables (waste oil, foam agent,
batteries, etc.). Please observe national provisions with regard to environmental protection.
2.5 Professional repair and maintenance
Repairs of high-pressure components (pump, safety valve, hoses and pipes), the gasoline
engine or the electrical system may be performed by qualified persons only.
All spare parts for high-pressure applications must have the appropriate accreditation. Use
only approved original spare parts for pump and engine.
For damage caused by improper and/or negligent operation, maintenance or repair, the
company HNE Technologie AG accepts no liability or claims for damages.
2.6 Residual hazards and protective measures
When using the MFU for firefighting, always wear adequate protective clothing against
heat, fire, water, falling debris and chemicals.
Always keep the highest possible safety distance to the fire.
Never target the compact water jet at persons or living animals. Breathing under a layer
of foam is impossible.
When set to full flow, a significant blowback occurs at the turbo gun. Take a firm stand
and hold the gun always with both hands.
Relieve the remaining pressure from the system after use by actuating the turbo gun.
Do not use or store the MFU in explosion/fire hazardous areas
Secure the MFU against unauthorized starting by removing the ignition key
Look for further storage information in the manual of the engine
manufacturer.
NOTE

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2.7 Electrical safety
The unit has a self-contained power supply (12 Volt DC) for the electrical control and the
on-board starter battery (alternator on the engine with external rectifier/charger).
REMEMBER:
Use only approved 12-volt car battery chargers to recharge the battery.
Charge the battery only with the ignition off. Do not overcharge.
Prolonged current draw at the socket with the engine not running can lead to an
exhausted Battery.
Replace blown fuses only with ones of same type and amperage.
All electrical components are water-protected. Nevertheless - avoid dirt, chemicals, splash
water and dampness around the device whenever possible.
Disconnect the negative terminal of the battery when working on the engine and/or the
electrical system.
DANGER !
Risk of short circuit or electric shock !
In case of damage to the electrical system: Never touch bare
wires or voltage leading components if the engine is running or
the ignition is active. Repair damaged cables as soon as
possible
Risk of electric shock !
In case of loose connectors or damaged insulation, the vicinity
of spark plugs and ignition cables can bear high voltage while
the engine is running
The 12V-socket at the rear panel is DIN 14690 compatible
and permanently active. It is useable to charge the battery or
for loads up to 140 Watts (maximum 12 Amp.)

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2.8 Emissions
The exhaust emissions of the engine meet the requirements of the European Community.
For more information, refer to the engine manual.
Never run the engine in closed or poorly ventilated areas –Risk of poisoning !
Stay away from exhaust gases, even with adequate ventilation.
Exhaust fumes are very hot and can cause fire and burns.
Do not store flammable or heat-sensitive objects in the immediate area of the exhaust.
IMPORTANT !
When changing the battery, follow these rules:
Work only with proper tools (open end wrench, size 10)
For disconnecting the terminals:
Remove negative pole first (black wire)
For reconnecting the terminals:
Attach positive pole first (red wire)
Isolate the positive terminal with the supplied plastic
cover
DANGER !
Engine exhaust contains poisonous carbon
monoxide. It can reach dangerous levels in the
absence of fresh air. Inhalation may cause
unconsciousness and death !

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3 Design and function
3.1 MFU Description
Specially designed for the requirements of first responders, the MFU is an autarkic, mobile
high-pressure extinguishing system for fighting fires of class A and B. It is equipped with 28
meters of hose on a semi-automatic reel, adjustable foam mixture and an attachable foam
thrower. Its outstanding performance and flexibility results from high working pressure,
variable flow rate and easy operating. The system allows quick adaptation of operation mode
and jet shape to any situation at the fire scene.
The MFU has a hard wearing high-pressure diaphragm pump, driven by a strong gasoline
engine. From a coupled tank, water is brought to working pressure (up to 50 bar) and blasted
with the jet-gun. With no connected tank or depleted reserves, water for extinguishing or
refilling can be sucked from an external source via the suction intake (C-coupling) at the
front.
At the control panel, either water, foam or idling mode is switchable by a simple push of a
button. Water goes at full throttle to the jet gun or at idle speed back to the bypass line. In
case of malfunction or reduced throughput, a safety valve protects the system from
overpressure. It directs any excess pump capacity back to the tank via the bypass line.
The addition of foam agent is switchable at any time. The concentration is setable at the front
panel.
Jet focus and throughput of the turbo gun are variable. When using the attachable foam
thrower, the foam consistency is adjustable as needed.
The machine may be combined with various tanks and mounted on any suitable vehicle or
trailer.
Available optional equipment:
Suitable water tanks in various sizes
Remote control (cable or wireless)
LED flood lights (lighting of MFU and surrounding)
Floating suction filter with C-coupling
Dust cover