Garmin GHP Compact Installation Instructions

GHP™ Compact

Reactor™ Hydraulic

Installation Instructions

Important Safety Information

WARNING

See the Important Safety and Product Information guide in the product box for product warnings and other important information.

You are responsible for the safe and prudent operation of your vessel. The autopilot is a tool that enhances your capability to operate your boat. It does not relieve you of the responsibility of safely operating your boat. Avoid navigational hazards and never leave the helm unattended.

Always be prepared to promptly regain manual control of your boat.

Learn to operate the autopilot on calm and hazard-free open water.

Use caution when operating the autopilot near hazards in the water, such as docks, pilings, and other boats.

CAUTION

When in use, beware of hot motor and solenoid components and the risk of entrapment from moving parts.

Failure to install and maintain this equipment in accordance with these instructions could result in damage or injury.

NOTICE

To avoid damage to your boat, the autopilot system should be installed by a qualified marine installer. Specific knowledge of hydraulic steering componentry and marine electrical systems is required for proper installation.

Installation Preparation

The autopilot system consists of multiple components. You should familiarize yourself with all of the component mounting and connection considerations before beginning installation. You must know how the components operate together in order to correctly plan the installation on your boat.

You can consult the layout diagrams (Power and Data Layout,

page 3) to help understand the mounting and connection

considerations. You should lay out all of the components on the boat as you

plan the installation to make sure your cables will reach each component. If needed, extension cables (sold separately) for various components are available from your Garmin® dealer or from www.garmin.com.

You should record the serial number of each component for registration and warranty purposes.

Tools Needed

• Safety glasses

• Drill and drill bits

• Wrenches

• 90 mm (3.5 in.) hole saw or a rotary cutting tool (for installing an optional helm control)

• Wire cutters/strippers

• Phillips and flat screwdrivers

• Cable ties

• Single Pole Single Throw (SPST) switch (to use as an autopilot bypass when not installing the Shadow Drive valve)

• Waterproof wire connectors (wire nuts) or heat-shrink tubing and a heat gun

• Marine sealant

• Marine corrosion inhibitor spray

• Portable or handheld compass (to test for magnetic interference)

• Hydraulic hose with machine-crimped or field-replaceable fittings that have a minimum rating of 1000 lbf/in

• Hydraulic T-fittings

• Inline hydraulic shut-off valves

• Hydraulic fluid

• Thread sealant

• Hydraulic bleeding equipment

• Anti-seize lubricant (optional)

NOTE: Mounting screws are provided for the main components of the autopilot system. If the provided screws are not appropriate for the mounting surface, you must provide the correct types of screws.

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Mounting and Connection Considerations

The autopilot components connect to each other and to power using the included cables. Ensure that the correct cables reach each component and that each component is in an acceptable location before mounting or wiring any components.

Helm Control Mounting Considerations

A dedicated helm control is not included in all autopilot packages. If you install the autopilot without a dedicated helm control, the autopilot CCU must be connected to the same NMEA 2000® network as a compatible Garmin chartplotter to configure and control the autopilot system.

NOTICE

This device should be mounted in a location that is not exposed to extreme temperatures or conditions. The temperature range for this device is listed in the product specifications. Extended exposure to temperatures exceeding the specified temperature range, in storage or operating conditions, may cause device failure. Extreme-temperature-induced damage and related consequences are not covered by the warranty.

The mounting surface must be flat to avoid damaging the device when it is mounted.

Using the included hardware and template, you can flush mount the helm control in the dashboard. When selecting a mounting location, observe these considerations.

• The mounting location should be at or below eye level to provide optimal viewing as you operate your vessel.

• The mounting location should allow easy access to the keys on the device.

• The mounting surface must be strong enough to support the weight of the device and protect it from excessive vibration or shock.

January 2016

Printed in Taiwan 190-01831-02_0A

• To avoid interference with a magnetic compass, the device should not be installed closer to a compass than the compass-safe distance value listed in the product specifications.

• The area behind the mounting surface must allow room for routing and connecting the cables.

Helm Control Connection Considerations

A dedicated helm control is not included in all autopilot packages. If you install the autopilot without a dedicated helm control, the autopilot CCU must be connected to the same NMEA 2000 network as a compatible Garmin chartplotter to configure and control the autopilot system.

• The helm control must connect to the NMEA 2000 network.

• Optional NMEA® 0183 devices, such as wind sensors, waterspeed sensors, or GPS devices can be connected to the helm control using a NMEA data cable (NMEA 0183

Connection Considerations, page 9).

CCU Mounting and Connection Considerations

• The CCU is the primary sensor of the GHP Compact Reactor Hydraulic autopilot system. For best performance, observe these considerations when selecting a mounting location.

◦ A handheld compass should be used to test for magnetic

interference in the area where the CCU is to be mounted. If the needle on a handheld compass moves when you

hold it where you intend to mount the CCU, magnetic interference is present. You must choose another location and test again.

◦ The CCU should be mounted on a rigid surface for best

performance.

• Mounting screws are provided with the CCU. If you use mounting hardware other than the provided screws, the hardware must be quality stainless or brass material to avoid magnetic interference with the CCU.

Test any mounting hardware with a handheld compass to make sure no magnetic fields are present in the hardware.

Finding the Best Mounting Location

Create a list of all suitable mounting locations for the CCU

where no iron, magnets, or high-current wires are located within 60 cm (2 ft.).

A large magnet, such as a subwoofer-speaker magnet should be no closer than 1.5 m (5 ft.) to these locations.

Locate the center of rotation of the boat, and measure the

distance between the center of rotation and each of the suitable mounting locations you listed in step 1.

Select the location closest to the center of rotation.

If more than one location is approximately the same distance from the center of rotation, you should select the location that best meets these considerations.

• The best location is closest to the centerline of the boat.

• The best location is lower in the boat.

• The best location is slightly forward in the boat.

ECU Mounting and Connection Considerations

• The ECU can be mounted on a flat surface, facing any direction.

• Mounting screws are included with the ECU, but you may need to provide different screws if the supplied screws are not suitable for the mounting surface.

• The ECU must be mounted within 0.5 m (19 in.) of the pump. ◦ The cables connecting the ECU to the pump cannot be

extended.

• The ECU must be mounted in a location where it will not be submerged or exposed to wash down.

• The ECU power cable connects to the boat battery, and it can be extended if needed (Power Cable Extensions,

page 7).

Pump Mounting Considerations

Consult the hydraulic-layout diagrams in these instructions to help determine the pump-installation location (Hydraulic

Layouts, page 4).

• The pump must be mounted at a location to which you can extend the hydraulic steering lines of the boat.

• The pump should be mounted horizontally if possible.

• If the pump must be mounted vertically, with the hydraulic connections facing upward.

Shadow Drive Mounting Considerations

NOTE: The Shadow Drive is a sensor you install in the hydraulic steering lines of your boat. It detects when you manually take control of the helm and suspends autopilot control of the boat.

NOTE: If your autopilot package does not include a Shadow Drive, you should install a manual switch to disable the autopilot if needed.

• The Shadow Drive must be mounted horizontally and as level as possible, with cable ties firmly securing it in place.

• The Shadow Drive must be mounted at least 305 mm (12 in.) away from magnetic materials or devices, such as speakers or electric motors.

• The Shadow Drive should be mounted closer to the helm than to the pump.

• The Shadow Drive should be mounted lower than the helm, but higher than the pump.

• The Shadow Drive must not be connected directly to the fitting at the back of the helm. There must be a length of hose between the fitting at the helm and the Shadow Drive.

• The Shadow Drive must not be connected directly to a hydraulic T-connector in the hydraulic line. There must be a length of hose between a T-connector and the Shadow Drive.

• In a single-helm installation, there must not be a T-connector between the helm and the Shadow Drive.

• In a dual-helm installation, the Shadow Drive should be installed between the pump and the hydraulic T-connector that leads to the upper and lower helm, closer to the helm than to the T-connector.

• The Shadow Drive must be installed in either the starboard steering line or the port steering line.

The Shadow Drive must not be installed in either the return line or the high-pressure line, if applicable.

Autopilot Switch Mounting and Connection Considerations

If your autopilot package does not include a Shadow Drive valve, you should install a manual Single Pole Single Throw (SPST) switch (not included) to disable the autopilot if necessary.

The switch should be installed near the primary helm, so it is easily accessible when operating the boat.

The switch should be connected to the same wires that connect a Shadow Drive valve.

If needed, the wires can be extended with 28 AWG (0.08 mm2) wire.

Alarm Mounting and Connection Considerations

• The alarm should be mounted near the primary helm station.

• The alarm can be mounted under the dashboard.

• If needed, the alarm wires can be extended with 28 AWG (0.08 mm2) wire.

NMEA 2000 Connection Considerations

• The CCU and the helm control must connect to a NMEA 2000 network.

• If your boat does not already have a NMEA 2000 network, one can be built using the included NMEA 2000 cables and connectors (Building a Basic NMEA 2000 Network for the

Autopilot System, page 8).

• To use the advanced features of the autopilot, optional NMEA 2000 devices, such as a wind sensor, a water-speed sensor, or a GPS device, can be connected to the NMEA 2000 network.

Power and Data Layout

WARNING

When connecting the power cable, do not remove the in-line fuse holder. To prevent the possibility of injury or product damage caused by fire or overheating, the appropriate fuse must be in place as indicated in the product specifications. In addition, connecting the power cable without the appropriate fuse in place voids the product warranty.

Item Description Important Considerations

ECU The ECU must be located within 0.5 m (19 in.) of

CCU The CCU can be mounted in a non-submerged

ECU power

cable

CCU cable To extend this cable to reach the ECU,

Pump The pump must be located within 0.5 m (19 in.)

Alarm The alarm provides audible alerts from the

Shadow Drive (optional)

Autopilot switch (not included)

the pump. The cables connecting the ECU to the pump

cannot be extended.

location near the center of the boat, in any orientation (CCU Mounting and Connection

Considerations, page 2).

The CCU must be located away from sources of magnetic interference.

The ECU must be connected to a 12 to 24 Vdc power source. To extend this cable, use the correct wire gauge (Power Cable Extensions,

page 7).

extensions (sold separately) may be necessary (CCU Mounting and Connection Considerations,

page 2).

This cable connects to the alarm and the Shadow Drive.

of the ECU. The cables connecting the pump to the ECU

cannot be extended.

autopilot system, and should be installed near the primary helm station (Installing the Alarm,

page 8).

The Shadow Drive must be installed properly in the hydraulic steering line, and connected to the CCU cable (Installing the Shadow Drive,

page 8).

If your autopilot package does not include a Shadow Drive valve, you should install a manual Single Pole Single Throw (SPST) switch (not included) to disable the autopilot if necessary.

Item Description Important Considerations

Helm control

(or compatible Garmin chartplotter)

Helm control

data cable

NMEA 2000

power cable

NMEA 2000

network

A dedicated helm control is not included in all autopilot packages. If you install the autopilot without a dedicated helm control, the autopilot CCU must be connected to the same NMEA 2000 network as a compatible Garmin chartplotter to configure and control the autopilot system.

This cable should be installed only if you are connecting the autopilot to optional NMEA 0183 devices, such as a wind sensor, a water-speed sensor, or a GPS device (NMEA 0183

Connection Considerations, page 9).

This cable should be installed only if you are building a NMEA 2000 network. Do not install this cable if there is an existing NMEA 2000 network on your boat.

The NMEA 2000 power cable must be connected to a 9 to 16 Vdc power source.

The helm control or compatible Garmin chartplotter and the CCU must be connected to a NMEA 2000 network using the included Tconnectors (NMEA 2000 Connection

Considerations, page 2).

If there is not an existing NMEA 2000 network on your boat, you can build one using the supplied cables and connectors (Building a

Basic NMEA 2000 Network for the Autopilot System, page 8).

Component Layout

Single-Helm Layout

NOTE: This diagram is for planning purposes only. If needed, specific connection diagrams are included in the detailed installation instructions for each component.

Hydraulic connections are not shown in this diagram.

Item Description Important Considerations

Helm control A dedicated helm control is not included in all

Pump

ECU

autopilot packages. If you install the autopilot without a dedicated helm control, the autopilot CCU must be connected to the same NMEA 2000 network as a compatible Garmin chartplotter to configure and control the autopilot system.

Item Description Important Considerations

12 to 24 Vdc

battery

CCU The CCU can be mounted in a non-submerged

NMEA 2000

network

The ECU must be connected to a 12 to 24 Vdc power source. To extend this cable, use the correct wire gauge (Power Cable Extensions,

page 7).

The NMEA 2000 power cable must be connected to a 9 to 16 Vdc power source.

location near the center of the boat, in any orientation (CCU Mounting and Connection

Considerations, page 2).

The CCU must be located away from sources of magnetic interference.

The helm control or compatible Garmin chartplotter and the CCU must be connected to a NMEA 2000 network using the included Tconnectors (NMEA 2000 Connection

Considerations, page 2).

If there is not an existing NMEA 2000 network on your boat, you can build one using the supplied cables and connectors (Building a Basic NMEA

2000 Network for the Autopilot System, page 8).

Dual-Helm Layout Guidelines

NOTE: This diagram is for planning purposes only. If needed, specific connection diagrams are included in the detailed installation instructions for each component.

Hydraulic connections are not shown in this diagram.

Item Description Important Considerations

Helm control A dedicated helm control is not included in all

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12 to 24 Vdc battery

Pump

ECU

The ECU must be connected to a 12 to 24 Vdc power source. To extend this cable, use the correct wire gauge (Power Cable Extensions,

page 7).

The NMEA 2000 power cable must be connected to a 9 to 16 Vdc power source.

Item Description Important Considerations

NMEA 2000

network

CCU The CCU can be mounted in a non-submerged

The helm control or compatible Garmin chartplotter and the CCU must be connected to a NMEA 2000 network using the included Tconnectors (NMEA 2000 Connection

Considerations, page 2).

If there is not an existing NMEA 2000 network on your boat, you can build one using the supplied cables and connectors (Building a Basic NMEA

2000 Network for the Autopilot System, page 8).

location near the center of the boat, in any orientation (CCU Mounting and Connection

Considerations, page 2).

The CCU must be located away from sources of magnetic interference.

Hydraulic Layouts

NOTICE

If the steering system in your boat does not match any of the hydraulic layouts in this manual and you are unsure how to install the pump, contact Garmin Product Support.

Before you start the pump installation, identify the type of hydraulic steering system in your boat. Each boat is different, and you must consider certain aspects of the existing hydraulic layout before deciding where to mount the pump.

Important Considerations

• The three hydraulic ports on the pump are 1/4 in. NPT.

• Garmin recommends using T-connectors to connect the hydraulic lines to the pump.

• To allow for easy pump disabling and removal, Garmin recommends installing shut-off valves in the hydraulic lines between the pump manifold and T-connectors.

• Teflon® tape must not be used on any hydraulic fitting.

• An appropriate thread sealant should be used on all pipe threads in the hydraulic system.

Single-Helm without Power Assist Layout

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Shadow Drive

Starboard line

Return line

Pump

Port line

Shut-off valves

Helm

Steering cylinder

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