installation directiVe
41
MAY 2006
N40 ENT M25
N60 ENT M37-M40
Sensor to detect the presence of water in fuel
Fuel resistivity sensor, integrated with the control and amplifi-
cation electronic circuit, providing the signal for the indicator
of the presence of water in the fuel.
Operating voltage
from 12V to 24 V
Condition in the absence of water open circuit
Closed condition
resistance of the liquid
≤
1 M
Ω
Operating temperature
from -20 °C to +80 °C
connections of the sensor detecting the presence of-water
in fuel
1. M Connector of the engine wire harness -
2. Sensor detecting the presence of water in the fuel -
3. Wiring harness (outfitter’s responsibility).
The three pole connection between the sensor for detect-
ing the presence of water in the fuel and the engine wire
harness must be produced by the outfitter according to the
position of the fuel pre-filter in the boat.
Connection to the engine wire harness requires a METRI-
PACK 150 three-pole connector with three male terminals;
connection to the sensor requires a JUNIOR TIMER three-
pole connector with three female terminals.
CAUTION
in order to enable the proper working of the sensor to
detect water in the fuel, it is necessary that the pre-filter
support is connected electrically to the negative battery
terminal.
In the engine models which use parts with insulated poles
it is necessary to electrically insulate the pre-filter support
from the boat mass and then connect the support with the
negative battery terminal.
04_239_N
Figure 40
Figure 41
A
B
C
3
1
2
A
B
C
3
1
2
04_253_N
1
2
3
Summary of Contents for NEF N40-ENT-M25
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