ComNav 1420 - Page 4

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First Printing: January 1993

Revised: June 2000

Revised: January/February/June 2009

Document PN 29010012 V1.3

Table of Contents

Table of Contents7
Product Description9
Before You Start10
Unpacking and Identification10
Manual Conventions10
Tools Required11
Parts List13
Installation Instructions17
1420 Autopilot System17
- Planning17
  - Processor Location17
  - Compass Location17
- Power Connection18
  - Power Cable18
  - Grounding18
- Installing the Mounting Clip and Spacer19
- Fluxgate Compass Installation19
- Rotary Rudder Feedback Installation20
- Outboard Feedback Installation23
Rudder Drive27
- Comnav Reversing-Motor Hydraulic Pump27
  - Pump Models & Specifications28
  - Specifications Common to All Pumps28
- Types of Steering Systems29
- Tools and Material Required to Install Pump29
- Notes & Cautions30
- Installing the Pump31
- Hydraulic Connections32
- Fill and Bleed34
Wiring the Processor37
- Right Side Connections38
- Left Side Connections40
  - Connecting the Ground Wire40
  - Connecting the Navigation Cable42
- Mounting the Processor43
- Powering up the System43
- Fuse Replacement44
- Check the Fuse44
Setting up the Autopilot System45
- Setup Routine45
- Finishing the Setup47
Piloting with the 1420 Autopilot System49
Steering Control Settings49
- Turning on the Autopilot49
- Turning the Autopilot off49
Determining Rudder Response Settings50
- Setting the Slow Speed Rudder Response50
- Slow Speed Turns and Course Changes51
- Setting the Fast Speed Rudder Response52
- Fast Speed Turns and Course Changes52
The Navigation Interface53
- Nmea 018353
Using the Navigation Interface54
- Cross Track Error54
Operation Commands55
Adjustment Commands57
Problem Solving58
- Problems During the Setup Routine58
- Problems During Normal Operation59
- Problems During Turn on62
- Appendix A63
- Connections to 4 and 5 Wire Motors63
- Appendix B64
- Connections to 4 and 5 Wire Motors (Using a Clutch or Lockup Valve)64
- Appendix C65
- Connections to Solenoid Valves65
- Appendix D66
- Connecting a Second Station66
- Appendix E68
- Connecting the NMEA 0183 Heading Output68
- Appendix F Connecting a Rudder Angle Indicator69
Warranty71
CE Compliance75

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