Garmin GHP 20 Marine Autopilot System with SmartPump Installation Instructions - Page 11

Helm Control Installation, Installing the Alarm

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3
Place the top of the bracket over the ball and snap it into the
mounted bracket, starting with the two arms
Á
that do not
have the thumbscrew
Â
.
4
With the cables hanging straight down, connect the arm with
the thumbscrew.
NOTE:
The cables must hang straight down for the CCU to
accurately read your heading.
5
Hand-tighten the thumbscrew until the CCU is held firmly in
the bracket.
Do not overtighten the thumbscrew.
Connecting the CCU
1
Route the connector end of the CCU cable to the pump and
make the connection.
2
Route the red and blue wires from the bare-wire portion of
the CCU cable to the location where you plan to install the
alarm (
page 11
).
If the cable is not long enough, extend the appropriate wires
with 28 AWG (0.08 mm
2
) wire.
3
Route the brown and black wires from the bare-wire portion
of the CCU cable to the location where you plan to install the
Shadow Drive (
page 12
).
If the cable is not long enough, extend the appropriate wires
with 28 AWG (0.08 mm
2
) wire.
4
Cut and cover the remaining bare wires. The remaining bare
wires are not used.
Helm Control Installation
You must Install the helm control by flush-mounting it in the
dashboard near the helm and connecting it to a NMEA 2000
network.
To use advanced features of the autopilot, optional NMEA
2000-compatible or NMEA 0183-compatible devices, such as a
wind sensor, water-speed sensor, or GPS device, can be
connected to the NMEA 2000 network or connected to the helm
control through NMEA 0183.
Mounting the Helm Control
NOTICE
The temperature range for the helm control is from 5°F to 158°F
(from -15°C to 70°C). Extended exposure to temperatures
outside of this range (in storage or operating conditions) may
cause failure of the LCD screen or other components. This type
of failure and related consequences are not covered by the
manufacturer’s limited warranty.
If you are mounting the device in fiberglass, when drilling the
four pilot holes, it is recommended to use a countersink bit to
drill a clearance counterbore through only the top gel-coat layer.
This will help to avoid any cracking in the gel-coat layer when
the screws are tightened.
Stainless-steel screws may bind when screwed into fiberglass
and overtightened. Garmin recommends applying an anti-
galling, stainless anti-seize lubricant to the screws before
installing them.
Before you can mount the helm control, you must select a
mounting location (
page 2
).
1
Trim the flush-mount template and ensure it will fit in the
location where you plan to mount the helm control.
The flush-mount template is included in the helm control
product box.
2
Remove the liner from the adhesive on the back of the
template and apply it to the location where you plan to mount
the helm control.
3
If you will be cutting the hole with a jigsaw instead of a 3.5 in.
(90 mm) hole saw, use a 3/8 in. (10 mm) drill bit to drill a pilot
hole as indicated on the template to begin cutting the
mounting surface.
4
Using the jigsaw or the 3.5 in. (90 mm) hole saw, cut the
mounting surface along the inside of the dashed line
indicated on the flush-mount template.
5
If necessary, use a file and sandpaper to refine the size of
the hole.
6
Place the helm control into the cutout to confirm that the four
mounting holes on the template are in the correct locations.
7
If the mounting holes are not correct, mark the correct
locations of the four mounting holes.
8
Remove the helm control from the cutout.
9
Drill the four
1
/
8
in. (3.2 mm) pilot holes.
If you are mounting the helm control in fiberglass, use a
countersink bit as advised in the notice.
10
Remove the remainder of the template.
11
Place the helm control into the cutout.
12
Securely fasten the helm control to the mounting surface
using the supplied screws.
If you are mounting the helm control in fiberglass, use a anti-
galling lubricant as advised in the notice.
13
Snap the mounting covers
À
into place.
Installing the Alarm
Before you can mount the alarm, you must select a mounting
location (
page 1
).
1
Route the alarm cable to the bare-wire end of the CCU
cable.
If the cable is not long enough, extend the appropriate wires
with 28 AWG (0.08 mm
2
) wire.
2
Connect the cables, based on this table.
Alarm Wire Color
CCU Cable Wire Color
White (+)
Red (+)
Black (-)
Blue (-)
3
Solder and cover all bare-wire connections.
4
Secure the alarm with cable ties or other appropriate
mounting hardware (not included).
11