Electrical system
4
Power supply
All engines covered in this manual have a two-pole
electrical system. This means that each electrical
component on the engine has an insulated DC nega-
tive return. The alternator, starter motor and all sen-
sors are electrically isolated from the engine block
and the positive and negative poles of the batteries
must be connected to the starter motor terminal.
Recommended single installation
-
NOTE! No equipment is connected to the starting
battery group.
- Two separate accessory battery groups.
Navigation equipment is connected to accessory
battery I.
- Bow and stern thrusters, anchor winches and
other heavy electrical loads are connected to ac-
cessory battery II. This to prevent voltage drop
in equipment connected to accessory battery I,
such as navigation instruments.
NOTE! Heavy electrical loads should have a sepa-
rate switch connected directly to the accessory
battery positive (+) terminal.
- All other equipment, lamps, fans, refrigerators etc.
(navigation instruments excepted) can be con-
nected either to accessory battery I or II.
- On D9, D, D2 and D6 the sensor cable is
factory mounted on the starter motor. If accessory
batteries are used, re-route the cable according to
the picture.
B+
Sensor cable
Start
battery
Accessory
battery I
Accessory
battery II
Alternator
Starter
Cross over switch
Accessories
3-way charge
distributor.
(Not a Volvo Penta
accessory)
Accessories
Bow thrusters, anchor
winches etc.
(heavy loads)
Charge distributor 12V and 24V. Engine
and boat.
The charge distributor automatically provides charg-
ing of two battery circuits, independent of each
other. One circuit is used for starting the engine and
the other circuit for other electrical equipment. This
means that if you empty the accessory battery, you
will still be able to start the engine from the start bat-
tery.
How to calculate the cable area is described in the
installation instruction included in the charging dis-
tributor kit.
Содержание D11 series
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