AUTOTERM AT0041 User manual

v10.2021
Manufacturer: AUTOTERM LLC
Paleju 72, Marupe, Latvia, LV-2167
Warranty Department [email protected]
Technical Support [email protected]
www.autoterm.com
MARINE FUEL KIT
User’s manual
EN

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CONTENTS
INTRODUCTION...............................................................................................................................................................................3
SAFETY INSTRUCTIONS....................................................................................................................................................................4
LIABILITY .........................................................................................................................................................................................5
GENERAL INFORMATION.................................................................................................................................................................5
GENERAL FUEL SYSTEM INSTALLATION ...........................................................................................................................................6
FUEL SUCTION HOSE INSTALLATION............................................................................................................................................6
ADDITIONAL FUEL TANK INSTALLATION......................................................................................................................................8
INSTALLATION OF THE FUEL PUMP AND FUEL LINE.....................................................................................................................8
MARINE FUEL KIT INSTALLATION ..................................................................................................................................................10

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INTRODUCTION
Dear Customer!
Thank you for choosing AUTOTERM Marine fuel kit! We are doing everything to make this product meet your requirements, so
its quality satisfies every customer.
This manual is intended for organizations that specialize in installation and maintenance of heaters AUTOTERM AIR,
AUTOTERM FLOW and users of the product after installation. The document covers main rules of installation of the product on
different small maritime transport (e.g., yacht, boat, cutter).
Please read carefully this manual before installing and operating the product.
This manual contains needful information in order to use this product correctly.
Disregard of these instructions can void the warranty of the product, lead to damage of product and/or property
and be a risk to health.
If the product is handled and/or installed improperly, there is a possibility of a fire hazard and damage of property
because of high temperatures and electrical components are being used. That is why all safety precautions,
operation and installation instructions must be observed.
For other languages of this manual, please see www.autoterm.com/manuals.

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SAFETY INSTRUCTIONS
Risk of damage due electrical nature
-Disconnect the product from the power supply before working on the product.
-Electric wiring, the air intake, and the fuel pipe must be protected from contact with sharp edges of vessel structures.
Risk of fire and explosion
-Switch off the heater, when the vessel is being re-fuelled.
-The installation arrangement must exclude the possibility of contact of the exhaust pipe with the air intake, fuel pipe, or
other flammable objects.
-The vessel where the heater is installed must be equipped with a fire extinguisher.
Personnel certified by AUTOTERM is needed
-For safety reasons, contact the service shop to troubleshoot the heater if it fails to launch two times in a row.
-In case of faults in the operation of the product, contact specialized repair organizations authorized by AUTOTERM.
-Repairs and works not described in this manual should be done only by certified professional

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LIABILITY
IN THE CASE OF NON-COMPLIANCE with the requirements, the persons who installed the heaters assume all risks
and any responsibility for the occurrence of adverse consequences and related damage resulting from installing and
repairing by personnel not having AUTOTERM certification, and/or using non-original spare parts for repair.
In case of any problems, we strongly recommend to contact certified service centres. Contact information and location of certified
service centres can be found at our website www.autoterm.com.
GENERAL INFORMATION
The AUTOTERM Marine fuel kit is designed to be used only with AUTOTERM AIR and AUTOTERM FLOW heaters.
This fuel kit meets the requirements of ISO 7840 –MARINE FUEL A1 standard. It applies to hoses for small craft with permanently
installed fuel systems. It does not apply to hoses entirely within the splash well at the stern of the craft connected directly to an
outboard engine.
This fuel kit is installed and used in place of standard fuel kit supplied with heaters.

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GENERAL FUEL SYSTEM INSTALLATION
Do not operate the heater using biofuel.
Use only diesel fuel standard EN590 for diesel operated heaters and gasoline EN 228 for gasoline operated heaters,
depending on the ambient temperature.
Act as instructed on Fig.1 and Fig.5 to install the fuel system. The fuel pump and the fuel supply line must be protected from
heating.
Do not take fuel from fuel filter or it’s casings, because doing so causes fuel leaks.
Do not take fuel from the fuel line between the fuel filter and fuel pump of the vessel’s engine, the return line of the
engine or after the high-pressure pump of the vessel.
Heater is not designed to work with pressure over 0.2 bar.
Recommended length of the fuel line is 5m. If possible, it is advised not to cut fuel lines to shorter lengths. Distance
between fuel tank and fuel pump should not exceed 1m and distance between fuel pump and the heater should not
exceed 4m (see Fig.1 and Fig.5)
FUEL SUCTION HOSE INSTALLATION.
Before installing a fuel suction hose in a fuel tank of the vessel, make sure that the fuel level is high enough to ensure
operation of the heater, and low enough to easily remove the fuel tank, if needed.

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Fuel is taken directly from the fuel tank of the vessel or an additional tank. Drill
a hole Ø16mm in the fuel tank to install a fuel suction hose. When drilling the
hole in the fuel tank, follow safety precautions that should be observed when
working with a transport, which is filled with fuel or explosive substance.
If needed, cut the immersible tube of the fuel suction hose shorter before
installation. Its bottom end must be located about 10-15 mm above the bottom
of the tank, or at the height to provide fuel for the engine in the fuel tank at any
time. The cut at the end of the fuel suction hose must be made at a 45° angle to
the axis of the tube. Remove all burrs from the cut after the work is done.
Install the fuel suction hose in the fuel tank as per Fig.2a. Install the special washer of the fuel suction hose in the tank hole as
per Fig.2b. Apply a fuel-proof sealant on the threaded surface of the fuel suction tank to properly seal the connection between
the fuel suction hose and the fuel tank.
Heater
Figure 1 - Connection of fuel supply to the heater with fuel suction hose
Figure 2a –Installation
of the fuel suction hose
Figure 2b - Installation
of the washer.

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Never install the suction hose on the side of the fuel tank. It must be installed on the top side of the fuel tank.
ADDITIONAL FUEL TANK INSTALLATION
Consider convenience of fuelling, when installing the fuel tank (Fig.3). Install the fuel tank in
such a way that the amount of fuel and its potential leaks from the inlet, fuel suction nozzle
or connections can be visually controlled.
When filling the fuel tank, be careful not to spill any of the fuel on the exhaust
system, wiring or other objects, which can be damaged due to their contact with
fuel.
Fuel tank must be installed with its wide side perpendicular to the direction of
the movement of the vessel (see Fig. 3).
INSTALLATION OF THE FUEL PUMP AND FUEL LINE
The fuel pump is connected to the heater through its own harness and supplies fuel
depending on the required heat capacity to the combustion chamber of the heater. The fuel
pump is operated by electrical impulses sent by the control unit. When running, the fuel
pump makes characteristic metallic clicking noise.
Wall/hull of the
vehicle/vessel
Fuel tank
cap
cap
Fuel tank
Bracket
Direction of movement
of the vehicle/vessel
Figure 3 –Installation of the fuel tank

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It is recommended to install the fuel pump close to the fuel tank (distance should not
exceed 1 meter (see Fig.1 and Fig.5)) and below the low level of fuel in the fuel tank, but
not lower than 70cm of the minimal fuel level (see Fig.5, point a)). But the height between
the fuel pump and the heater cannot be greater than 1,5 meters (see Fig.5, point b)). Fuel
pump should be positioned with a slight angle pointing upwards (see Fig.4)
If for some reason sealing of the fuel pump is compromised, it is advised to install the fuel
pump lower than the heater in order to avoid leaks and overflooding the heater with fuel
due to gravity.
Remember to properly bleed the “silent” TH11 fuel pump. If it’s not properly
bled it will be as loud as a standard fuel pump.
To bleed it start the heater and position the
fuel pump with its outlet upwards till there
are no air bubbles in the fuel line and only
then secures the fuel pump in its
recommended position.
Figure 4 - Installation angle of Advers fuel
pump (1) and Thomas Magnete (2) fuel
pump.
Heater
Recommended level for installation
of fuel pump
Minimal level of fuel
a=70 cm
b=1,5 m
Fuel line
Figure 5 –Hight position of the fuel pump in the fuel system

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MARINE FUEL KIT INSTALLATION
1 –Fuel tank
4 –Clamp
7 –Fitting
2 –Heater
5 –Shut off valve
8 –Sleeve
3 –Fuel pump
6 –Copper O-ring gasket
9 –Copper fuel pipe
Assemble the marine kit according the diagram (see Fig. 6) following the steps described below:
1. Assemble the shut off valve (5) and both fittings (7) together. Put copper O-rings (6) at the fitting thread side
2. Put rubber sleeves (8) with clamps (4) to the both fittings.
3. Connect the fuel pump incoming line to the shut off valve outgoing side sleeve. Tighten sleeve clamps.
4. Mount fuel tank or fuel pick up tube (included in the heater installation kit) according Fig.2 or Fig.3
5. Fasten the fuel pump (3) to the surface with a clamp. Don’t overtake 1m maximum distance from the fuel tank (1).
6. Connect fuel pick up tube/fuel tank to the shut-off valve (5) using 1m copper pipe (9) piece and sleeves (8). Push copper
pipe (9) into the sleeve (8) as deep as possible to avoid air bubbles occurrence during operation. Do not cut the pipe. Fasten
copper fuel pipe (9) to surface with P-type clamps every 50-80 centimetres.
Figure 6 –Marine fuel kit assembly diagram

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7. Connect 4m copper pipe piece (9) to the fuel pump outgoing side sleeve (8).
8. Fasten fuel pipe to the surface. It is preferable to lay the fuel supply line on a straight line and with a small inclination
upwards in the direction of the heater. The fuel supply line should be fastened every 50-80 cm to prevent sagging, prevent
effects of vibrations and avoid fractures. Do not cut the copper pipe.
9. Connect fuel pump wiring harness to the fuel pump socket. Check if the shut off valve (5) is open. Start the heater several
times until the fuel removes air from the fuel pipe.
10. Put rubber sleeve (8) with clamps (4) to the heater (2) fuel intake pipe and connect the end of 4m copper pipe (9) to the
heater (2). Push copper pipe into the sleeve (8) as deep as possible to avoid air bubbles occurrence during operation
11. Retighten all clamps (4). Start the heater (2) and check fuel lines for leakage during operation.