Garmin GHP 20 Marine Autopilot System for Steer-by-Wire Installation Instructions Manual

Contents

Garmin GHP 20 Marine Autopilot System for Steer-by-Wire Installation Instructions Manual Manual pdf 5 page image

GHP 20 Installation Instructions 5Installation PreparationBefore installing the GHP 20 autopilot system, you must plan where allthe components will be located on your boat. Temporarily place all thecomponents where you intend to install them. Read these considerationsbefore you begin planning your installation.NOTE: There is an installation checklist on the last page of theseinstructions. Remove the last page and refer to the checklist as youproceed through the GHP 20 installation.Mounting and Connection ConsiderationsThe GHP 20 components connect to each other and to power using theincluded cables. Ensure that the correct cables reach each componentand that each component is in an acceptable location before mountingor connecting any components.CCu Mounting Considerations• The CCU must be mounted in the forward half of the boat, nohigher than 10 ft. (3 m) above the waterline.• The CCU must not be mounted in a location where it will besubmerged or exposed to wash-down.• The CCU must not be mounted near magnetic material,magnets (speakers and electric motors), or high-current wires.• The CCU must be mounted at least 24 in. (0.6 m) away frommovable or changing magnetic disturbances such as anchors, anchorchain, wiper motors, and tool boxes.• A handheld compass should be used to test for magnetic interferencein the area where the CCU is to be mounted.If the handheld compass does not point north when you hold it inthe location where you intend to mount the CCU, there is magneticinterference. Choose another location, and test again.• The CCU can be mounted below the waterline if it is not in alocation where it will be submerged or exposed to wash-down.• The CCU bracket must be mounted on a vertical surface or under ahorizontal surface, so that the connected wires hang straight down.• Mounting screws are included with the CCU, but you may need toprovide different screws if the supplied screws are not suitable forthe mounting surface.CCu Connection ConsiderationsNoticeDo not connect the steering controller cable to a NMEA 2000 network.The GHP 20 requires a powered CAN bus to communicate with thesteering controller. Ensure that the steering controller CAN bus isproperly powered and terminated. Consult the boat manufacturer ifneeded.• The steering controller cable connects the CCU to the steeringcontroller of the boat, and provides 9.5 ft. (3 m) of cable betweenthe CCU and the steering controller access.◦ If needed, you should consult the manufacturer of your boat forassistance locating the steering-system access.◦ If the CCU cannot be mounted within 9.5 ft. (3 m) of the steeringcontroller access of the boat, NMEA 2000 cables can be used toextend the connection.◦ The steering controller cable must not be cut.alarm Mounting Considerations• The alarm should be mounted near the helm station.• The alarm can be mounted under the dashboard.alarm Connection Considerations• If needed, the alarm wires can be extended with 28 AWG (.08 mm2 )wire.nMEa 2000 Connection Considerations• The CCU and the GHC 10 connect to the NMEA 2000 network.If your boat does not have a NMEA 2000 network, one can be builtusing the included NMEA 2000 cables and connectors (page 10).• To use advanced features of the GHP 20, an optional NMEA2000-compatible GPS device can be connected to the NMEA 2000network.GHC 10 Mounting Considerations• The mounting location should provide optimal viewing as youoperate your vessel.• The mounting location should allow easy access to the keys on theGHC 10.• The mounting surface must be strong enough to support the weightof the GHC 10 and protect it from excessive vibration or shock.• The area behind the surface must allow room for the routing andconnection of the cables.There should be at least a 3-inch (8 cm) clearance behind the case ofthe GHC 10.• The location must be at least 91/2 in. (0.24 m) from a magneticcompass, to avoid interference.• The location must be in an area that is not exposed to extremetemperature conditions (page 15).GHC 10 Connection Considerations• You must connect the GHC 10 to the NMEA 2000 network.• Optional NMEA 0183-compatible devices, such as a GPS device,can be connected to the GHC 10 data cable (page 10).