Lowrance NAC-3 Autopilot Computer Network Pilot Installation Manual ACP
Lowrance NAC-3 Autopilot Computer Manual
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- Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 1
NETWORK ACP PILOT INSTALLATION & COMMISSIONING MANUAL BROOKES & GATEHOUSE LTD Premier Way Abbey Park Romsey Hampshire SO51 9DH England Tel: (+44) 01 794 518448 Fax: (+44) 01 794 518077 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 2
SECTION 1 SYSTEM UNITS SECTION 1 SYSTEM UNITS 1 SITING THE ACP UNIT 4 MOUNTING PROCEDURE 4 ACP REMOTE COMPASS UNIT 5 DESCRIPTION 5 SITING THE COMPASS UNIT 6 MOUNTING PROCEDURE 6 NETWORK PILOT DISPLAY 7 SITING THE PILOT DISPLAY HEAD 8 MOUNTING PROCEDURE 8 NMEA INTERFACING 9 NMEA INPUT 9 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 3
ADVANCED CONTROL PROCESSOR UNIT DESCRIPTION The Advanced Control Processor (ACP) Unit contains all the electronics for the autopilot operation and control of the rudder drive options. It is designed to be mounted on a vertical, flat , smooth surface. The unit has a hinged lid to provide easy access - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 4
The 12V ACP 1 Unit will control the following rudder drive options: • Size 1/12V Hydraulic Ram Drive • Size 1/12V Hydraulic Pump • 12V Rotary Drive Unit • Stern Drive Unit RAM-T1-12V blue PMP-T1-12V blue RDU-T1-12V SDU-T1-12V • The 24V ACP 2 unit will control the following rudder drive options: - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 5
SITING THE ACP UNIT • It is recommended that the ACP unit is mounted with the cable entry points downwards. It must not be mounted with the cable entries uppermost as water may run down the cables and into the unit. • Ensure that there is sufficient space to allow the unit to be hinged open to make - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 6
ACP REMOTE COMPASS UNIT DESCRIPTION IMPORTANT NOTE: This external fluxgate compass unit can ONLY be used with ACP Pilot Systems or Network Compass displays. Remove the transit screw after mounting on bulkhead and before inserting cable connector. The ACP Remote Compass Unit is a gimbal mounted - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 7
SITING THE COMPASS UNIT • Mount the unit upright on a flat, vertical bulkhead. • A safe distance from external magnetic interference: • 1m/3ft from VHF, RDF, loudspeakers, depth sounders, engines, power cables carrying heavy current, etc., • 3m/10ft from Radar and SSB Equipment. • Reasonably well - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 8
autopilot and navigational system. It is essential that the autopilot is initialised before operation, details are given in the commissioning section of this manual. In an integrated system boat speed is supplied from Network SPEED or QUAD units and wind speed and wind angle from Network WIND via - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 9
SITING THE PILOT DISPLAY HEAD All Network Instruments are designed for mounting on or below deck. Select a display site that is: • At a convenient position within easy reach of the helmsman • On a smooth and flat surface • At a compass safe distance 100mm (4") • Reasonably well protected from - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 10
• Clip the display head into the mounting bracket. • Secure the display head with the thumb nuts supplied (if required). NMEA INTERFACING The Network PILOT can be interfaced to any NMEA 0183 (v1.5) compatible position fixer. If more than one source of NMEA data is to be used then it will be - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 11
NMEA OUTPUT NMEA output is via the network cable connection tail, use a special 3m NMEA output cable 610-OA-030 (Red sig+, Blue sig-). Dependent on system devices, the following sentences are transmitted: $IIHDM $IIVHW $IIDBT $IIVWR $IIMTW Heading Speed and heading Depth below transducer - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 12
HAND-HELD CONTROLLER DESCRIPTION The hand-held remote controller is a waterproof unit that has six function buttons and a status LED to indicate the operating mode of the autopilot. The unit provides palm-of-the-hand control of the PILOT. The cable has a 10 metres /30ft straight section, plus a - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 13
MAN OVERBOARD BUTTON (MOB) DESCRIPTION The man overboard alarm button (MOB) is a large red waterproof switch with 15 metres/45ft of two-core screened cable. This button starts the MOB sequence of operations when pressed and the audible alarm sounds (if fitted). SITING THE MAN OVERBOARD ALARM BUTTON - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 14
ACP JOYSTICK DESCRIPTION The joystick allows direct control of the vessel's rudder via the autopilot control electronics. The unit is deck-mountable, allowing it to be used inside or outside the steering positions. A 10m/30ft 6-core screened cable connects the unit directly into the ACP Units - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 15
the gasket is fitted under the joystick body flange. • Secure in place with self-tapping screws. • Route the cable to ACP unit. Connect as per instruction in Section 4 of this handbook. For details on how to install the controller button refer to the MOB section. 1 - 14 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 16
RUDDER REFERENCE UNIT (RRU) DESCRIPTION The Rudder Reference Unit (RRU) is a sealed high specification potentiometer in a robust casing, providing rudder position information to the Computer Unit. The operating arm is constructed in aluminium with three positions pre-drilled for the adjustable drag- - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 17
KEY POINTS WHEN INSTALLING THE RRU • General consideration must be given to the steering system and its geometry before starting the RRU installation. Many factors must be contemplated for a practical solution, the information given here is for guidance only, although where a maximum or a minimum - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 18
The example shown is a plan view of a typical system with a tiller arm and quadrant. When viewed in elevation, the ram drive arm and rudder reference unit drag-link must not be more than ±9º from horizontal. Ideally everything should be horizontally aligned, this prevents excessive stress during - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 19
1 - 18 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 20
The RRU can be mounted in many different positions and orientations depending on the layout of the steering system. If the maximum rudder angle is less than 90º then the position of the RRU or the drag-link must be adjusted so that the operating arm of the RRU swings through a minimum of 90º and the - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 21
The rudder hard over angle should only be limited by the rudder stops and not the RRU linkage. Check that when hard over the RRU arm and drag-link, do not form a straight line. If this occurs the steering system could become damaged or jammed endangering the boat and crew. Rectify this immediately - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 22
SECTION 2 RUDDER DRIVE OPTIONS RAM DRIVE UNIT 2 DESCRIPTION 2 BLUE RAMS(DRIVE DATA 2 SIZE 1 & 2 HYDRAULIC DRIVE PUMP DIMENSIONS _____6 RAM DRIVE UNIT INSTALLATION 7 Key Points On Installation 8 A Typical Ram Drive Unit Layout (REFER TABLE 2-5) _____9 Ram Mounted Parallel To Vessels Centre-Line - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 23
RAM DRIVE UNIT DESCRIPTION A compact DC driven reversible hydraulic pump and hydraulic cylinder assembly for boats without hydraulic steering systems. Three sizes of ram drive are available giving a wide thrust range to suit all sizes and types of vessel. BLUE RAMS(DRIVE DATA) Type 1 and type 2 rams - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 24
RAM DRIVE TYPE ACP UNIT MOTOR SUPPLY SOLENOID VALVE SUPPLY PEAK THRUST PEAK CURRENT MAXIMUM STROKE FULL BORE AREA ANNULUS AREA ROD DIAMETER TILLER ARM for 700 rudder MAXIMUM TORQUE WEIGHT HELM TO HELM TIME extend retract RAM SIZE1 BLUE ACP1 12V DC 12V DC 1.25A (max) 425 kg force - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 25
RAM-T1-12V midstroke = 505mm ACP1 only d= 73.3 1/2 max Tiller arm Offset rudder angle mm mm Thrust Torque at Torque at Torque (peak midships midships (at max ° a b c Kgf) (peak Kgm) (50%Kgm) 50%Kgm) 25 290 272 425 123 123 118 30 245 227 425 104 104 90 35 214 196 425 91 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 26
RAM DRIVE UNIT DIMENSIONS - BLUE SIZE 1 AND 2 ACTUATORS AND BLUE RAMS. 2 - 5 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 27
SIZE 1 & 2 HYDRAULIC DRIVE PUMP DIMENSIONS PUMP AND RAM DRIVE UNIT DIMENSIONS - BLUE SIZE 3 (REFERTO TABLE 2-5) 2 - 6 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 28
to. It is essential that the unit is only installed in a fully functional steering system, with no backlash or stiffness when operating. Rectify any steering problems before installation of the ram drive unit or the autopilot will not function correctly. 2 - 7 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 29
KEY POINTS ON INSTALLATION • Check that the steering gear is in good condition. Rectify any steering defects prior to installation of the ram. • The ram drive unit must be secured onto a flat, rigid base, it maybe necessary to construct a platform section for the mounting plate. For angled rudder - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 30
A TYPICAL RAM DRIVE UNIT LAYOUT (REFER TABLE 2-5) b = tiller arm length a=half max rudder angle d 2 - 9 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 31
RAM MOUNTED PARALLEL TO VESSELS CENTRE-LINE (REFER TO TABLE 2-5) 2 - 10 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 32
KEY POINTS ON INSTALLATION. • Make sure that the rudder angle is limited by the rudder stops and not the limit of travel of the ram arm. Failure to do this will damage the unit and invalidate the warranty. • Make sure that there is sufficient space at each end for the ram arm to extend fully, the - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 33
VERTICAL BULKHEAD INSTALLATION.(REFER TABLE 2-5) b= tiller arm 5 5 =d a=half max rudder angle 2 - 12 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 34
SPLITTING THE RAM DRIVE UNIT IMPORTANT NOTE: When dealing with any hydraulic system great care must be taken to ensure that a high degree of cleanliness is observed and no dirt, moisture or foreign objects are allowed to enter the system. When filling or topping up the external reservoir only use a - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 35
and a pilot operated reservoir valve to enable the unit to drive balanced or unbalanced cylinders. The unit has Port and Starboard 1/4" BSP service ports and a 1/4" BSP reservoir port. PUMP DATA HYDRAULIC PUMP PMP-T1-12V TYPE PUMP TYPE Reversible DC motor SUPPLY VOLTAGE 12V DC TYPICAL - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 36
KEY POINTS ON INSTALLATION A position should be chosen convenient for the steering system hydraulic delivery lines. • The site should be rigid and flat to prevent excess vibration. • Shielded from the direct effects of the elements. • Minimise the lengths of the hydraulic lines from the pump to the - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 37
HYDRAULIC DRIVE PUMP DIMENSIONS Type 1 and 2 Type 3 105mm (4.13) 80mm (3.15) 4 holes φ 7.0mm (0.28) 88.9mm (3.5) centres 50.8mm (2.00) centres 240 mm (9.45) 2 - 16 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 38
the lowest point, usually at a cylinder coupling. 2. Fit T-pieces into the port and starboard delivery lines, couple the lines to the appropriate service ports of the pump using flexible hydraulic hose. 3. Couple the reservoir port to the reservoir/balance line from the helm units. A low pressure - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 39
10. When satisfied that the steering is fully bled manually, apply power to the pump unit. 11. Turning the wheel fully from lock to lock will cause the pump to self purge. 12. Check the - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 40
HYDRAULIC DRIVE PUMP INSTALLATION EXAMPLES Single Station System Example Dual Station System Example 2 - 19 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 41
Dual Station System With Bypass Example Dual Station Pressurised System Example 2 - 20 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 42
SECTION 3 ADDITIONAL RUDDER DRIVE OPTIONS OUTDRIVE DRIVE UNIT 2 DESCRIPTION 2 OUTDRIVE DRIVE UNIT DATA 2 MOUNTING BRACKET KITS 2 OUTDRIVE DRIVE UNIT - DIMENSIONS 3 ROTARY DRIVE UNIT 4 DESCRIPTION 4 ROTARY DRIVE DATA 4 ROTARY DRIVE UNIT DIMENSIONS 5 ROTARY DRIVE SPROCKET WHEEL SELECTION 6 3 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 43
the cylinder to the power steer unit depends upon engine type and are listed below. Other brackets available on request. Mechanical installation instructions are supplied with the brackets. OUTDRIVE DRIVE UNIT DATA PUMP TYPE SUPPLY WEIGHT Reversible DC motor 12V DC 2.7kg MOUNTING BRACKET KITS - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 44
OUTDRIVE DRIVE UNIT - DIMENSIONS 3 - 3 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 45
of mechanical steering systems. Connection to the steering system is most commonly via sprocket gears and chain. These to be supplied by the installer. As a guide the following should be considered for the drive sprocket: UK/Euro 13 tooth 3/8" pitch (steel) USA 10-20 tooth (steel) for Type 40 or 41 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 46
ROTARY DRIVE UNIT DIMENSIONS 3 - 5 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 47
ROTARY DRIVE SPROCKET WHEEL SELECTION The number of teeth on the drive sprocket wheel must be chosen to match each installation. The following guide may be used to select an appropriate sprocket. The aim is to achieve a hardover to hardover time of 10 to 12 seconds. Note: The Rotary - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 48
• Check hardover time using formula: Hardover time = Number of turns of Driven sprocket x 3 x (Driven teeth/Driver teeth) e.g. hardover time = 3.1 x 3 x (25/20)= 11.6 The calculated value for the hardover time using a driven sprocket with 25 teeth and a driver sprocket with 20 teeth would be - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 49
Section 4 ACP UNIT INSTALLATION CABLE AND CONNECTION INFORMATION 2 EMC COMPLIANCE 2 GENERAL WIRING NOTES 2 PILOT DRIVE UNIT CABLES 4 All rudder drives - heavy duty power cables 4 Rams and rotary drives - clutch/valve cables 4 ACP UNIT TERMINAL DETAILS 5 Wire colour coding and abbreviations 5 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 50
in its design and testing to ensure compliance with the European EMC Directive, provided it is installed and operated in accordance with the instructions as supplied, and the units and cables are used unmodified. Specific attention is drawn to the requirements to maintain cable separation, where - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 51
• All cables should be routed at least 1m / 3ft from cables or components that carry or generate high currents, e.g. alternators, starter motors and cabling, trim-tab cables, etc. • To minimise interference avoid routing Network cables alongside high power radio or Radar cables, allow 3m/10ft - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 52
PILOT DRIVE UNIT CABLES ALL RUDDER DRIVES - HEAVY DUTY POWER CABLES TOTAL CABLE LENGTH UPTO 8m/26ft UPTO 12m/40ft UPTO 20m/65ft B&G CABLE PART No. 135-0A-128 Not available Not available COPPER AREA 4.0mm² 6.0mm² 10.0mm² CABLE GAUGE 12 AWG 10 AWG 7 AWG RAMS AND ROTARY DRIVES - CLUTCH/VALVE - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 53
ACP UNIT TERMINAL DETAILS NOT USED WIRE COLOUR CODING AND ABBREVIATIONS R BLK BL BR G WIRE COLOUR TABLE Red V Black Y Blue O Brown W Green BLANK Violet Yellow Orange White Silver (Not Used) 4 - 5 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 54
CLUTCH VOLTAGE SELECTION NOTE: The ACP1 Computer Unit does not have dip switches for clutch voltage selection. The clutch output voltage is fixed at 12V and is therefore only suitable for Size 1/12V Rams and pumps and 12V rotary drives. The ACP2 Computer Unit can output different clutch/solenoid - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 55
ACP2 DIP SWITCH LOCATION NOTE: When reassembling the computer unit ensure that the connector in the top left-hand corner of the PCB mates together properly. 4 - 7 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 56
NETWORK AND ALARM CONNECTIONS NOT USED Cable 612-0A-064 (6 metres) Cable 135-0A-09(c6ut off green wire) 4 - 8 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 57
REMOTE COMPASS CONNECTIONS NOT USED 4 - 9 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 58
HANDHELD, MOB AND JOYSTICK NOT USED 4 - 10 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 59
HYDRAULIC RAM DRIVE CONNECTIONS 4 - 11 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 60
BLUE RAM SOLENOID WIRING DETAILS The following information applies to the Size 1, Size 2 and Size 3 Blue Rams only. 1.Remove the solenoid wiring connector by unscrewing the centre screw. 2.Remove the screw from the connector housing. 3.Remove the rubber gasket. 4.Use a small screwdriver through the - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 61
HYDRAULIC PUMP CONNECTIONS 12V Hydraulic Pump 4 - 13 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 62
STERNDRIVE DRIVE UNIT CONNECTIONS 4 - 14 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 63
12V/24V ROTARY DRIVE CONNECTIONS DRIVE SUPPLY IN DRIVE SUPPLY OUT + + Blk R Blk R CLU ALM TS1 Bl Br Blk Bl Bl Br Y G V Br W R Scr NET HAND HELD TS2 TS3 Blk G Bl R Y Blk G V Br W Bl R R G W G R R Blk Bl RRU MOB BOAT SPEED TS4 O/G O/G Y G W Bl R Bl R G - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 64
CONTINUOUS DRIVE UNIT CONNECTIONS These are general wiring instructions only, showing the installation of the Computer Unit outputs to drive the continuous drive pump solenoid valves. The continuous drive pump motor will also require a - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 65
PROPORTIONAL SOLENOID CONNECTION These are general wiring instructions only, showing the installation of the ACP 2 Computer Unit outputs to drive proportional solenoid valves. The continuous drive pump motor will also require a heavy duty - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 66
COMPASS DIRECT PADDLE INPUT CONNECTION CLU ALM TS1 Bl Br Bl Br NET HAND HELD TS2 TS3 Blk G Bl R Y Blk G V Br W R Bl R G W G R R Blk Bl RRU MOB BOAT SPEED TS4 O/G O/G Y G W Bl R Bl R G Cut back the un-used coloured wires: Please consult your dealer for the specific - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 67
LINEAR FEEDBACK CONNECTION For Linear Feedback installations, connect the wires from the sensor to the processor using the reference table below. Linear Feedback Unit Red Black White Network ACP Rudder Reference Red Blue Green -B&G CONNECTION Linear Feedback Unit PADDLE 4 - 19 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 68
speed signal and ground of the paddle sensor to the speed input of the ACP computer unit. 4. Calibrate the speed input in accordance with the instructions given in the COMMISSIONING (5-30) section of this manual. 4 - 20 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 69
Non B&G Display Non B&G Paddle Unit ACP UNIT PADDLE TERMINALS (TS3) GREEN RED BLACK SILVER FUNCTION SPEED SIGNAL INPUT NOT USED GROUND SCREEN CABLE 135-0B-098 RED WIRE NOT USED BLUE WIRE SCREEN 4 - 21 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 70
SECTION 5 COMMISSIONING NETWORK PILOT COMMISSIONING 3 PILOT INSTALLATION CHECK LIST 3 DRIVE UNIT & STEERING SYSTEM 3 HYDRAULIC RAMS 3 BLUE SIZE 3 RAM INSTALLATION CHECK LIST 4 HYDRAULIC PUMPS 4 ROTARY DRIVES 4 RUDDER REFERENCE INSTALLATION 4 LINEAR FEEDBACK UNIT INSTALLATION 5 COMPASS - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 71
OF THE PILOT COMPASS 24 CHECKING THE COMPASS OFFSET 25 AUTOMATIC RUDDER GAIN 25 CHECKING THE AUTOMATIC RUDDER GAIN LEARNING __________ 26 MANUAL RUDDER GAIN 26 SETTING THE RUDDER GAIN MANUALLY 27 RUDDER GAIN VALUE TABLE 28 BOAT LAG 28 SETTING THE BOAT LAG VALUE 29 BOAT LAG VALUE TABLE 29 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 72
COMMISSIONING Before the Network Pilot can be used, it is necessary to set and calibrate various parameters. This procedure is called Commissioning. This manual covers both ACP 1 and ACP 2 Pilot systems. PILOT INSTALLATION CHECK LIST The check list below should be used prior to the commissioning of - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 73
BLUE SIZE 3 RAM INSTALLATION CHECK LIST 1.The base foot of the ram and pump have been firmly bolted into position 2.The Reservoir has been fixed to a bulkhead ABOVE the Ram and Pump. 3.The sealed reservoir transit cap has been replaced by the Breather cap supplied. 4.The Reservoir has been switched - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 74
because usually less motion than fore of centre ELECTRONICS INSTALLATION 1. Cables secure 2. Cables undamaged 3. No loose bits of wire 4. Screens connected in accordance with wiring instructions and sleeved where appropriate 5 - 5 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 75
TO ENTER COMMISSIONING MODE With the autopilot in Standby, press AUTO and OFF key at the same time. The display will change to the following display. READY TO BEGIN COMMISSIONING TO EXIT COMMISSIONING MODE Press the RED OFF key. 5 - 6 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 76
RE-ENTERING COMMISSIONING MODE When the autopilot has been commissioned it is possible to change the values that have been set by pressing the AUTO and OFF keys together. The display will now show COMMISN. Use the SETUP key to select the parameter to be changed. COMMISSIONING PARAMETERS The - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 77
COMMISSIONING ALONGSIDE Set the following parameters prior to a sea trial. BT TYPE Select type of boat SET RDP Rudder end stop Port SET RDS Rudder end stop Starboard SET RDM Rudder Mid position DRIVE A Select the rudder drive type ST RDT Rudder Hard-over time BLN10.0M Boat waterline length in Metres - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 78
COMMISSIONING ALONGSIDE The following commissioning parameters will be set in this section of commissioning: 1. BT TYPE 2. SET RDP 3. SET RDS 4. SET RDM 5. DRIVE A 6. ST RDT 7. BLN10.0M 8. BLN 32F 9. DIP 0 10. CMP 000º 11. POWER Select type of boat Rudder end stop Port Rudder end stop Starboard - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 79
SELECTING THE BOAT TYPE There are three selections available: SAIL POWER D POWER P For all sail boats. For power boats with displacement. For power boats with planing hulls. Press SETUP key, select BT TYPE. Press ENTER key. Display flashes. Use ▲ or Press the ▼ to select ENTER the boat key - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 80
SETTING THE RUDDER END STOPS Before the Network PILOT can be used it must know the position of the rudder end stops. SETTING THE PORT END STOP Press SETUP Move the key, select SET rudder to hard RDP over port position. Press ENTER to set PORT end stop, the display confirms setting is - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 81
SETTING THE MIDSHIPS POSITION Press SETUP Move the key, select SET rudder to the RDM. amidships position. Press ENTER to set the MID position, the display confirms setting is successful. 5 - 12 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 82
SELECTING THE RUDDER DRIVE TYPE Depending upon the type of rudder drive unit fitted the PILOT controls the rudder drive motor in different ways, this optimises the autopilot steering response. There are three selections available: 1. DRIVE A Ram drives, Hydraulic pumps, Rotary drives, all sizes and - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 83
RUDDER HARD-OVER TIME To finish the rudder end stop commissioning procedure the autopilot must calculate the rudder hard-over port to hard-over starboard time. The following points must observed before carrying out the procedure: 1. If the boat is equipped with hydraulic power assisted steering the - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 84
Press the SETUP key to display ST RDT. Press ENTER key, the autopilot will drive the rudder to the port end stop position. Then it will measure the time taken from port to starboard and back, coming to rest in the midships position. During the timing calculation, the autopilot display will show - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 85
BOAT LENGTH Boat waterline length must be entered into the autopilot for it to steer accurately. This value can be entered in Metres or Feet. SETTING IN METRES Press Press SETUP ENTER key to key. select Display BLN10.0M flashes. . Adjust the Press value, ENTER ▲= value key, the up new - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 86
MAGNETIC DIP ANGLE BOATS FASTER THAN 20 KNOTS ONLY All magnetic compasses are effected by 'Northerly turning errors' in the Northern Hemisphere or 'Southerly turning errors' in the Southern Hemisphere, which increase with boat speed and magnetic dip angle in higher latitudes. These can cause heading - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 87
SETTING THE MAGNETIC DIP VALUE Press SETUP key, select DIP 0. Press ENTER key, Display flashes. Adjust the Press value, ENTER ▲= value key, up the value ▼= value is down memorised . 5 - 18 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 88
COMPASS ALIGNMENT The Compass Alignment electronically compensates for the misalignment between the autopilot's fluxgate compass and the Earth's magnetic field. Use the following procedure: 1. The boats actual heading must be known, use a compensated bowl compass or hand-held compass for reference. - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 89
VERIFY OPERATION OF RUDDER DRIVE • Power Steer mode can be used to verify that the Rudder Drive is operating correctly. • Turn the wheel so the rudder is in the midships position (if possible). NOTE: When the AUTO key is pressed the rudder will return to the position it was in when POWER steer was - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 90
It is now necessary to carry out a Sea Trial to finish the autopilot Commissioning. IMPORTANT NOTE: Until all parameters have been set or checked the autopilot should not be used to steer the boat. 5 - 21 - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 91
a proper lookout. • If in doubt, disengage the autopilot with the red OFF key on any Pilot Display or Hand-held Controller, and return to manual steering. The following parameters should be set and checked during the initial sea trial. SET RDM SWING BLG 0.3 RGN 0.50 SC 6.25 POWER Rudder mid - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 92
course change buttons on any Network Pilot Display or Hand-held Controller. 6. Press the red OFF key to disengage the autopilot and return to manual steering. RESETTING THE RUDDER MIDSHIPS POSITION Due to hull design and steering characteristics the best rudder midships position can only be set when - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 93
Press SETUP Move the Press ENTER key, select SET wheel to the to reset the RDM. midships midships position. Check position, the that the boat display settles onto a confirms the steady, straight setting is course. successful. CALIBRATION OF THE PILOT COMPASS This procedure will - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 94
of turn will be approximately 7.5º per second. If there is no direct speed input or the speed is being set by the Network Pilot Display Manual Speed Band selections, then the Rudder Gain value must be entered - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 95
heading display should jump in 7.5º steps.) 7. Press the red OFF key to disengage the autopilot and return to manual steering. 8. Now proceed with checking and adjusting the Boat Lag value. MANUAL RUDDER GAIN 1. Steer the boat onto a suitable heading, allow time for the boat to settle on this course - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 96
the minimum value necessary to maintain a good response to course changes and course keeping without excessive rudder movement. SETTING THE RUDDER GAIN MANUALLY The autopilot must be disengaged and commissioning mode selected to adjust the Rudder Gain value. Press SETUP key, select RGN 1.25. Press - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 97
RUDDER GAIN VALUE TABLE BOAT TYPE SAIL BOATS POWER BOATS DEFAULT VALUE 0.50 1.25 TYPICAL VALUES 0.3 to 1.0 1.0 to 3.0 NOTE: The factory set value is selected by setting Boat Type and Rudder Drive Type during commissioning. BOAT LAG Boat Lag is the time taken for the boat to respond to changes - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 98
BOAT LAG CORRECT BOAT LAG INCORRECT SETTING THE BOAT LAG VALUE The autopilot must be disengaged and commissioning mode selected to adjust the Boat Lag value. Press SETUP key, select BLG 0.3. Press ENTER key, Display flashes. Adjust the value, ▲= value up ▼= value down Press ENTER key, the value - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 99
boats rudder by using any Network Pilot Display or Hand-held controller course change keys. This could be used in an emergency if the normal manual steering system become defective, e.g. a broken steering quadrant cable or control rod. It can also enable faults in the ram drive unit or drive pump - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 100
SELECTING POWER STEER MODE 1. With the autopilot in standby, STBDY. 2. Select the commissioning mode by pressing AUTO and OFF keys together. 3. Turn the wheel so the rudder is in the midships position (if possible). Press SETUP key, select POWER. With the rudder amidships. Press AUTO key to engage - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 101
SECTION 6 TROUBLE SHOOTING TROUBLE SHOOTING INTRODUCTION 2 UNCOMIS UNCOMMISSIONED 3 RUD ERR RUDDER REFERENCE 3 RUD DRV RUDDER DRIVE 4 NO SPD NO BOAT SPEED 6 int cmp EXTERNAL COMPASS 6 NO NMEA NO NMEA - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 102
TROUBLE SHOOTING INTRODUCTION The Pilot Control Unit is continually monitoring the Pilot and Network System for correct operation. If an error is detected the Pilot Display - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 103
UNCOMIS UNCOMMISSIONED Fault description: Rudder not commissioned or memory has been corrupted. Check list: 1. Has rudder ever been successfully commissioned? Yes, go to 4. No, go to 2. 2. Set rudder end & mid positions, move helm, does rudder indicator work ? Yes, go to 4. No, go to 3. 3. Rudder - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 104
to the rudder reference should be 4.5 to 5.0 volts (between RedBlue). With someone moving the helm, the signal measured between (Blue-Green) should change smoothly. If the signal is incorrect, suspect a faulty rudder reference unit. Note, the difference between the signal voltages measured at the - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 105
Check list: 1. Is the Heavy duty power supply circuit breaker for the autopilot drive switched on? 2. Check installation, look for any slack or loose fixings in the drive system or the rudder reference as the helm is moved. 3. Move the helm, does the rudder indicator work, if not, check installation - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 106
6. If the fault only occurs intermittently or under heavy loads. Use power steer mode to move rudder while restricting movement by holding wheel. Fault only occurring under these conditions could be due to: • Excessive motor current. • Too much slack or backlash in drive or fixing to tiller, - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 107
Pilot system. 3. Check operation of Position Fixer, has NMEA output been selected and enabled? Has autopilot output been enabled? Refer to Position Fixer manual. BAD XTE BAD NMEA DATA Fault description: The value of XTE data being received has suddenly changed by more than 0.3 nautical miles. Check - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 108
TRIP CURRENT TRIP Fault description: The voltage/current limit circuit for the drive motor or the clutch has tripped. ACP112V Drive Motor - 15A Clutch - 2A ACP212/24V Drive Motor - 25A Clutch - 2A Check list: 1. Check installation and wiring for short circuits. 2. Check current to clutch, maximum - Lowrance NAC-3 Autopilot Computer | Network Pilot Installation Manual ACP - Page 109
and associated linkages, see earlier section. 3. Boat speed. Check that the boat speed input is operating correctly. 4. Settings. Read the commissioning manual carefully and check that the settings are appropriate for the type of boat. 5. Rudder gain. Make large course changes using the pilot, if
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