-11-
PRO
PILOT
725 INSTALLATION & SERVICING MANUAL
Installing
your
Propilot
725
hydraulic
steering
systems.
Hydraulic
pumps
should
be
mounted
on
a
rigid
base
to
avoid
unnecessary
vibration
and
noise.
The
heavy
duty
supply
should
be
fused
according
to
the
drive
unit
fitted:
930 100, 101, 130, 132, 135, 160, 161, 162
30A Antisurge
930 110, 111, 155, 170, 171, 172, 180, 182
20A Antisurge
930 146
10A Antisurge
930 102, 112 (Continuous Running Pumps)
5A Antisurge
For other continuously running pumps use a fuse rating of a
suitable size for the solenoids.
For either system it is acceptable to use a Fused switch or a
Circuit breaker. Changing the Phasing to reverse the rotation of
the motor can be done electronically after it is wired. This is
explained later in the Installation Settings.
Big Ship Links
There
are
two
links
on
the
PCB
inside
the
Distribution
Box
that
are
particularly
useful
for
installations
on
large
vessels.
These
links
are
located
in
the
top
right
area
of
the
930-618
Distribution
Box
PCB,
alongside
the
8
way
DIL
switch
'S1'.
They
are labelled 'P2' and 'P4'.
The Link P2, if shortened, allows the Power Steer facility to
override the 30º rudder limit that the autopilot uses and apply
up to 45º of rudder.
The Link P4, if shortened, does two things;
it increases the amount of counter rudder used at the end of
a course change.
it extends the time constant for the trim rate so that the
rudder is applied about 75% slower.
Good Wiring
Having
decided
on
the
location
and
position
of
each
unit
it
is
Practice
essential
to
check
the
cable
runs
to
ensure
that
there
are
no
problems.
All
cable
runs
should
be
kept
as
clear
as
possible
from
other
cables
carrying
RF
(radio
frequency),
pulsed
signals
or
heavy
