Scania DI09 Manuel utilisateur

02:03 Issue 7.0 en-GB

Installation manual

Fuel system

Marine engines

DI09, DI13, DI16

333 381

INSTALLATION

MANUAL

02:03 Issue 7.0 en-GB 2

Changes from the previous issue............................................................................3

Fuel tank...................................................................................................................3

Position................................................................................................................ 4

Fuel tank design .................................................................................................. 5

Main tank and buffer tank ................................................................................... 6

Fuel lines...................................................................................................................7

Fuel filter ..................................................................................................................8

PDE and XPI engines.......................................................................................... 8

PDE engines ...................................................................................................... 10

XPI engines ....................................................................................................... 11

Fuel cooler ..............................................................................................................12

Feed pump flow rates ............................................................................................13

Risk of fire..............................................................................................................14

Fuel grade and power for PDE engines...............................................................15

Important data.......................................................................................................17

INSTALLATION

MANUAL

Changes from the previous issue

02:03 Issue 7.0 en-GB 3

Changes from the previous issue

The changes made in this document compared with the previous issue are marked

with a black line in the left-hand margin. The changes are also described below.

• Information about DI13 XPI has been added.

• An example illustration has been added to the Main tank and buffer tank section.

• The information in the Feed pump flow rates section has been made clearer.

Fuel tank

The illustration shows an example of a marine fuel tank installation.

384 168

Example of a fuel tank installation.

1. Bleed pipe.

2. Fuel filler pipe with filler cap.

3. Lead-through sleeve of fuel-resistant rubber.

4. Inspection hatch.

5. Baffle plate.

6. Shut-off cocks.

7. Prefilter.

8. Drain tap for sludge and water.

9. Suction pipe with bottom strainer.

10. Return pipe.

11. Ground connection.

INSTALLATION

MANUAL

Fuel tank

02:03 Issue 7.0 en-GB 4

Position

Positioned lower than the engine

The fuel tank must not be positioned so low that the vacuum in the feed pump suction

pipe exceeds 0.3 bar. The risk of air leaks in the suction pipe increases with increased

vacuum.

If the fuel tank is mounted so low that the maximum permissible vacuum is exceeded,

or if a large fuel tank is required which cannot be mounted close to the engine, a buff-

er tank must be installed at a suitable distance and height. See Main tank and buffer

tank. If a reliable and quick starting response is required, the buffer tank should be

positioned adjacent to the engine with the lowest fuel level at the same level as the

feed pump.

Positioned higher than the engine

If the fuel tank is positioned higher than the engine, a shut-off cock must be installed

on the fuel pipe to the feed pump. This is to prevent unfiltered fuel entering the en-

gine during maintenance.

To prevent fuel leakage during filter renewal, a shut-off cock must also be installed

on the return pipe if the fuel tank is positioned higher than the engine.

Maximum permitted fuel level in the fuel tank is 3.5 m in relation to the feed pump.

Other

It is important that the fuel tank is positioned in as cool a location as possible since

the return fuel is hot and therefore raises the temperature of the fuel in the tank. If the

fuel tank is built in, the space should be well ventilated.

Power correction for PDE engines due to the fuel temperature increase is displayed

in the tables in the Fuel grade and power for PDE engines section.

INSTALLATION

MANUAL

Fuel tank

02:03 Issue 7.0 en-GB 5

Fuel tank design

The fuel tank must be designed as follows:

• The material for the fuel tank should be corrosion-resistant, such as stainless steel

or aluminium.

Note:

Some other materials, such as copper or hot dip galvanised sheet steel, are unsuitable

for use with diesel fuel.

Fuel tanks manufactured from materials which are not resistant to corrosion must

be treated externally with anti-corrosion paint.

• The fuel tank must not be painted internally nor be zinc-coated or galvanised.

• The fuel tanks must be fully welded.

• The fuel tanks must be equipped with internal baffle plates to prevent the fuel be-

ing thrown about in heavy seas.

• Both fuel filling components and the fuel tank must be grounded to prevent spark-

ing from static electricity.

New fuel tanks must be thoroughly cleaned and rinsed internally using clean fuel.

They must also be pressure tested to 0.3 bar.

The fuel tank should normally be drained once a year, but this may vary depending

on the quality of the fuel.

The fuel tank must have the following devices:

• A drain tap for emptying sludge and water that has sunk to the bottom.

The reason for this is that the water separated out with the prefilter follows the

return fuel back into the fuel tank.

• A ventilation or bleed line from the upper part of the fuel tank to the outside of

the hull. It should be designed so that water cannot enter and so that fuel cannot

run out when the ship is leaning heavily.

• Protection or filter to prevent contaminants entering during filling.

• Main tanks must be fitted with inspection hatches so that they can be inspected

and cleaned inside.

INSTALLATION

MANUAL

Fuel tank

02:03 Issue 7.0 en-GB 6

Main tank and buffer tank

If the engine installation has a buffer tank and main tank, these should be designed

as follows:

• The main tank should have a sloped bottom or be on a slight incline (about 3-5°)

and have a tap at the lowest part for draining condensation.

• The buffer tank must also be fitted with a drain tap for condensation.

• The lines to the buffer tank should be as short as possible and should be mounted

in such a way that they cannot be exposed to mechanical damage.

• An electric feed pump must be fitted directly downstream of the main tank. It

must be connected so that it only pumps when the engine is running, to avoid the

risk of major leaks when the engine is at a standstill.

The flow for the electric feed pump must be 30-40% higher than the flows spec-

ified in the Feed pump flow rates section. This is to ensure that the quantity of

return fuel is sufficient for lubrication and cooling.

• There must be a return pipe from the buffer tank to the main tank so that any sur-

plus fuel runs back to the main tank.

Note:

The return pipe should should enter below the lowest fuel level in the main tank. See

illustration.

See instructions in the Fuel tank design section for further details.

392 389

3-5°

1. Lowest fuel level.

2. Level of return line output.

3. Return pipe.

4. Suction pipe with strainer.

5. Fuel gauge.

6. Drain tap.

INSTALLATION

MANUAL

Fuel lines

02:03 Issue 7.0 en-GB 7

Fuel lines

The fuel lines should be designed as follows:

• The fuel lines should be routed so that the fuel cannot be heated by radiated heat

from the engine. Maximum permitted fuel temperature in the inlet pipe is 60°C.

For PDE engines, the dependence of the engine power on the fuel temperature is

stated in the table in the Fuel grade and power for PDE engines section.

• The return pipe from the overflow valve must be routed to the fuel tank or to the

buffer tank (if fitted). For PDE engines, the return pipe and suction pipe should

have the same diameter.

Note:

The return pipe should should enter below the lowest fuel level in the fuel tank. See

previous section.

The return line must not be connected to the suction line.

• The suction pipe in the fuel tank must be placed at a sufficient distance from the

bottom of the tank, so as not to suck up deposits gathered at the bottom.

• In multi-engine installations, the fuel system should be divided into at least two

independent systems so that a fault in one of the fuel lines does not cause all en-

gines to stop.

• The fuel lines should not be made of copper as there is a risk of oxidation due to

condensation. The sulphur content in the fuel can also have a negative effect on

the copper.

The recommended minimum inside diameters of fuel lines are shown in the table.

Length of the fuel lines

Minimum inside diameter (mm)

PDE engines,

DI13 XPI

DI16 XPI

Shorter than 3 m

Suction pipe 10 14

Return line 10 10

Longer than 3 m

Suction pipe 12 16

Return line 12 12

INSTALLATION

MANUAL

Fuel filter

02:03 Issue 7.0 en-GB 8

Fuel filter

PDE and XPI engines

The engines are equipped with an engine-mounted fuel filter. PDE engines also have

the option of commutative engine-mounted fuel filters which can be renewed during

operation.

All engines must also be fitted with a water separating prefilter. PDE engines require

one prefilter XPI engines require two prefilters, see next section. The water separat-

ing prefilter should be changed at the same intervals as the main filter.

All connections on the suction side of the feed pump must be thoroughly sealed so

that no air is drawn in during operation.

The water separating prefilter should not be installed directly on the engine and a

shut-off cock should be fitted before the filter.

The prefilters must be fitted before the feed pump and must be low in relation to the

fuel tank so that the fuel is forced into the filter. This prevents air being sucked into

the filter during draining.

The prefilters should not be installed higher than the feed pump, because that results

in an unnecessarily high suction height, making the engine more difficult to start.

In multi-engine installations, there should be extra fuel filters between each engine

and the fuel tank.

REQUIREMENT!

Measure the fuel vacuum when the installation is complete. Refer to 02:08 Measur-

ing instructions for installation inspection.

360

A=50

48,4

9,5

58,7 32,5

Ø107

12,7

373 818

Single water separating prefilter.

1. Outlet, SAE 8 P ¾"16 UNF 2B.

2.Intake, same dimensions as outlet.

A = Free space required for prefilter renewal.

INSTALLATION

MANUAL

Fuel filter

02:03 Issue 7.0 en-GB 9

Information about how the single prefilter harness-to-harness connector is connected

is available in 03:01 Electrical system.

It is also possible to install prefilters which are commutative. It is possible to renew

commutative fuel filters with the engine running by switching off one filter at a time.

These prefilters have a water separator and an indicator, which show when it is time

to renew the filters.

Note:

Always renew both filters at the same time.

145

124

98,5

248

385

B=254

98,5

124

SECTION A-A

476

373 817

Commutative water separating prefilter.

1.Intake, 7/8 14 UNF 2B straight thread with SAE J514 male JIC 37°.

2.Outlet, same dimensions as the intake.

B = Free space required for prefilter renewal.

INSTALLATION

MANUAL

Fuel filter

02:03 Issue 7.0 en-GB 10

PDE engines

PDE engines require one water separating prefilter.

Permitted water separating prefilters for PDE engines

• Single prefilter from Scania.

• Commutative prefilter from Scania.

• Prefilter from external supplier.

If a prefilter from an external supplier is installed, a filter with a cleaning efficiency

of a maximum of 30 micrometres is recommended.

373 816

Fuel filter installation on PDE engines.

1. From fuel tank.

2. Water separating prefilter, maximum 30 micrometres.

3. Feed pump with hand pump.

4. Main fuel filter.

5. To injector.

6. Engine-mounted components.

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