Bedienungsanleitung Navman Diesel Fuel Flow Sensors (Seite 28 von 39) (Englisch)

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Diesel fuel flow sensor kit Installation and Operation Manual

NAVMAN

7-4 Installing the temporary straight through pipes

Before fitting the straight through pipes, plan

where the sensors will be fitted (see section

7-3). This section describes how to fit the

temporary through pipes where the flow

sensors will be fitted. The actual sensors are

not fitted until later, after the engine has been

checked (see section 7-5).

1 Wear gloves to protect your hands from

the diesel fuel.

2 Turn OFF the fuel tap at the outlet of the

boat’s fuel tank.

3 Put a tray of rags under the pipe where

you will cut it to absorb the fuel that will

spill.

4 Disconnect or cut the fuel line where the

supply and return sensors will be fitted.

To cut solid pipe, use a pipe cutter. Do not

use a hack saw - it will leave small metal

particles in the pipes that will harm the

sensor and other items in the fuel line.

5 Fit the temporary through pipes in the

supply and return pipes where the

sensors will be fitted. Note:

The two flow sensors will be mounted

horizontally, with the wire connectors

underneath. It does not matter which

fuel connection is the inlet and which

is the outlet (see 7-3).

The exact details of how you fit the

through pipes will depend on where

you are installing the through pipes

and the configuration of your engine

installation. Instructions for the

common case of installing the pipe in

the middle of a solid copper pipe run

are given in section 7-4-1. If in doubt,

consult a qualified diesel engineer.

Apply thread sealer to the all fittings

(see section 7-2-5)

Warning: Make sure pieces of

the threadseal tape or paste can

not break off and enter the fuel pipe

Do up the fittings tightly with the

correct tool. The through pipe has

flats for attaching a spanner or

wrench.

However, when fitting the through

pipe in the supply line, tighten the

inlet connection but leave the outflow

connection loose temporarily.

Keep a real sensor on hand and use it

to check for available space, that the

fuel line aligns with the sensor ports,

and that the cables and connectors

will not be difficult to get to later.

When the sensors are fitted later they

must be firmly attached to a panel

in the boat or a mounting block. If

necessary, fit the mounting block

now. Check that the sensor can be

attached to the boat without straining

the pipe joint.

6 Carefully open the fuel tap at the fuel tank

until fuel drips from the joint at the outlet

of the through pipe in the supply line. This

should have filled the pipe and first joint

with fuel - meaning there will be less air in

the system that has to be bled out to start

the engine. Turn the tap off.

Note that there is no need to expel air

from the return pipe - it will happen

automatically when the engine starts and

fuel starts flowing.

7 Tighten the connection on the outflow

side of the supply through pipe with the

correct tools.

8 Do not leave diesel soaked rags in the

boat when you have finished - they are a

fire hazard. Take them out and dispose of

them properly.

9 Test run the engines (see section 7-5).

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