-8-
PRO
PILOT
725 INSTALLATION & SERVICING MANUAL
Installing
your
Propilot
725
information
for
fuse
ratings.
Distribution
This
is
the
heart
of
the
system
and
must
be
installed
in
a
DRY,
Box
accessible
position.
Ideally
the
box
should
be
positioned
so
that
the
heavy
duty
power
supply
cables
from
the
batteries
to
the
distribution
box
and
from
the
distribution
box
to
the
drive
unit
are
kept
to
a
minimum length. This is particularly important on sailing
vessels where often you are operating on batteries which are
not fully charged.
If the distribution box has to be installed in the engine room
please ensure that the area is properly ventilated to avoid high
ambient temperatures and abnormal condensation levels.
Compass
The Compass Sensor needs to be carefully located. The
Sensor
optimum position is to mount it on a convenient (vertical)
bulkhead, as low and as close to the centre line of the boat as
possible. On fast vessels, it is advisable to fit the compass
sensor at least half way back along the centre line.
On steel vessels it is necessary to mount the sensor 2 to 3
metres above the superstructure or to use a Gyro or Pick-off
coil system working from the vessel's main steering compass.
The compass sensor must be installed away from sources of
magnetic interference, such as:
Radios, RDF, Depth Recorders, etc:
at least 1 metre clearance
Power cables carrying more than 0.5 amp:
at least 1 metre clearance
Radar Magnetrons:
at least 3 metre clearance
Ship's engines, large mass steel (soft iron) etc:
at least 1 metre clearance
Also, do not install the compass in a position where magnetic
material i.e. tool boxes, drink cans, chain etc. may be stowed
at any time.
Check the proposed location with a hand bearing compass.
This will indicate whether there is a large deviation that may
cause problems. Switch on any electrical equipment that may
cause deviation and check the hand-bearing compass to see if
there has been any change on heading. If a change is observed
the Sensor should not be installed in this position as the
compass heading may not reflect the true heading of the craft,
therefore making autopilot control inaccurate.
