Solenoid Valve Controlled Pumpset; Other Accessories - Nexus AUTOPILOT Installation And Operation Manual

INSTALLATION

Solenoid valve controlled pumpset

If the boat is already fitted with a hydraulic steering with a solenoid valve controlled
pumpset for 12 or 24 VDC, connect one solenoid coil to Servo Unit terminal "Common" (-)
and terminal "Motor 1" (+) and the other to terminal "Common" (-) and terminal "Motor 2"
(+).
Make sure that the Servo Unit dip switch "solenoid valve" (change all switches on the DIP)
has been selected.
Solenoid valve controlled pumpset should be adjusted to speeds of 14 seconds hard over
to hard over or slower for maximum accuracy. Higher rudder speeds will require increased
anti-hunt settings to prevent hunting (overshoot of the rudder).
To adjust anti-hunt setting, first complete procedures in described in sections Setup,
Dockside Testing and Sea Trials. Activate the Autopilot and with the pumpset running,
make 10° course changes to port and starboard.
If the rudder hunts (i.e. oscillates rapidly back and forth during these course changes,
gradually increase the anti-hunt control (i.e. adjust VR1 trim potentiometer) until the rudder
remains stable. Do not increase the anti-hunt control any more than necessary, as this can
begin to degrade course accuracy.

9.10 Other Accessories

Install any accessories as per their instructions and connect them according to wiring as
shown in Servo Unit wiring drawing.
When you finished the installation, perform the Dockside Testing routine.
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