19
ELECTRICAL INSTALLATION
WARNING!
Carefully follow the wiring diagram for single
and twin engine installation on pages 21 and 22,
respectively.
Installation in sailboats or other special installa-
tions require different wiring depending on boat
specifications. Get in touch with an authorised
Volvo Penta workshop.
The system must be installed as per the instruc-
tions. Deviations from the instructions may
invalidate the warranty. Installation must be
carried out by an authorised Volvo Penta work-
shop.
Ensure all cables are properly clamped.
Batteries and switches
The Volvo Penta Electronic Control System can
be connected to 12 V or 24 V DC batteries.
The Volvo Penta Electronic Control System must
always be connected to two independent battery
groups, such as start and service batteries.
Do not use any nonproprietary connectors, i.e.
voltage regulators, or similar equipment when
installing the system.
The battery groups must have a common neg. (-)
connection but need not be of the same voltage:
e.g. start batteries can be 24 V and service
batteries 12 V. But prerequisite for using 12 V
and 24 V at the same time is that Main pos. (+)
and the ignition are always connected to the
battery group that has the highest voltage during
normal boat operation.
The boat’s start batteries must be the main
group, Main pos (+), which operates the elec-
tronic unit, provided they have higher voltage
while running than the service batteries, which
function as a backup should power from the start
batteries diminish or fail.
Battery cable and manual reset circuit
breaker
The grey three-lead cable (red, red/white and
black wires) should be connected between the
electronic unit and respective battery group.
There must be a main switch and circuit breaker
between the electronic unit and the respective
battery group.
Volvo Penta circuit breakers are vibration-proof
and designed for marine applications.
Install the circuit breakers where they are easily
accessible.
The feed cable must be connected directly to its
respective main switch in the boat’s battery
system and a circuit breaker installed between
the main switch and the VPEC system.
If the feed cables must be longer, the cables
must be thicker than that supplied.
The red wire no.1 Main pos. (+) is the main
voltage supply to the system and must always be
connected to the battery group with the highest
operating voltage.
IMPORTANT!
The red/white wire no. 2 is the Backup pos. (+) of
the system, which automatically takes over
should the Main battery voltage diminish or fail.
The red wire no.1, Main pos.(+), and the red/
white wire no.2, Backup pos.(+), wires may not
be connected to the same battery group.
The black wire no. 3 (neg.-) connects to the
battery neg.(-).
Neg.(-) must be common from both battery
groups.
Cable to ignition key
The black three-lead cable (with red, blue and
yellow wires) connects to the ignition key. (Yellow
wire to relay; see terminal diagram, pages 21
and 22).
Red wire no. 4 connects to the ignition key’s
output pos. (+) in running position, which then
supplies operating voltage to the electronic unit.
Blue wire no. 5 connects to the ignition key’s
output pos. (+) in starting position to supply
operating voltage to the electronic unit while
starting the boat engine. This works as compen-
sation for the red wire which, at the starting
moment, can be dead, depending on what type
of ignition key and/or engine is fitted.
These two wires, red and blue, must always run
individually and may
not
be attached to the
same connection. The blue wire may never
supply voltage while the boat is running.
Red and blue wires must always be connected
to the same battery group to which the battery
system Main pos. (+) is connected, usually the
engine’s start battery group.
Installation in sailboats or other types of special
installation require different wiring depending on
individual boat specifications. Get in touch with
an authorised Volvo Penta workshop.
Neutral-only start relay
A relay connected as per the wiring diagram
prevents starting while the engine is in gear.
Installation Instructions
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