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Garmin GMR Fantom 256 Manual

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Installation Procedures
Preparing the Radar Mounting Surface
Before you can mount the radar, you must choose a suitable
mounting location (Mounting Considerations, page 1).
1
Secure the included mounting template to the surface at the
mounting location, along the bow-stern axis, as indicated on
the template.
2
Drill the mounting holes using a 15 mm (
19
/
32
in.) drill bit.
3
If you need to run the power and network cables through the
mounting surface, select a location along the center channel
indicated on the template, drill a pass-through hole for the
cables using a 32 mm (1
1
/
4
in.) drill bit, and route the cables
through the surface (optional) (Wiring and Connection
Considerations, page 2).
4
Remove the mounting template from the surface.
Mounting the Radar
Before you can mount the radar, you must select a mounting
location (Mounting Considerations, page 1) and prepare the
mounting surface (Preparing the Radar Mounting Surface,
page 2).
1
Place the radar onto the mounting surface, aligning the holes
on the base of the radar with the holes you drilled when
preparing the mounting surface.
2
Apply the included Petrolatum Primer to the threads of the
four threaded rods.
3
Insert the threaded rods through the mounting surface and
into the radar base, and tighten them using a 5 mm hex
wrench.
To avoid damaging the pedestal, you should stop tightening
the threaded rods when they no longer turn easily.
4
From under the mounting surface, place the included plastic
shoulder washers over the threaded rods and into the
holes.
5
Place the flat washers , lock washers , and hex nuts
on the threaded rods.
6
Tighten the hex nuts to a torque of 14.7 N-m (11 lbf-ft.) to
securely fasten the radar to the surface without damaging the
radar or the mounting hardware.
Installing the Antenna
Before you can install the antenna on the radar, you must
securely mount the pedestal (Mounting the Radar, page 2).
1
Remove the protective cover from the waveguide on the
top of the pedestal.
2
Align the waveguide on the pedestal with the socket on
the bottom of the antenna , and slide the antenna onto the
pedestal.
3
Secure the antenna to the pedestal by tightening the captive
hex bolts under the antenna arm.
4
Tighten the hex bolts to a torque of 7.9 N-m (6 lbf-ft.) to
fasten the antenna to the pedestal without damaging the
antenna or the mounting hardware.
Wiring and Connection Considerations
It may be necessary to drill 32 mm (1
1
/
4
in.) holes for routing the
power, network, or grounding cables.
• When routing multiple cables through the same hole, you
must route the network cable before the power and ground
cables because of the size of the network connector.
• You must apply marine sealant to the hole after the cables
are in place to ensure a waterproof seal.
If you must make the routing hole in a visible location,
decorative cable grommets can be purchased from Garmin or a
Garmin dealer (optional).
• If needed, you can trim the grommet to enable you to route
multiple cables through the same hole.
• The optional grommet does NOT provide a waterproof seal.
You must apply marine sealant to the grommet after the
cables are in place to ensure a waterproof seal.
When installing the cables, you should observe these
considerations.
• Cutting the Garmin Marine Network cable is not
recommended, but a field install kit can be purchased from
Garmin or a Garmin dealer if you must cut the network cable.
• The ground cable is not included, and must connect to a
water ground location, not the negative terminal of the battery
(Grounding the Radar, page 3).
• To ensure safety, appropriate tie-wraps, fasteners, and
sealant should be used to secure the cable along the route
and through any bulkheads or the deck.
• You should not run cables near moving objects and high-heat
sources, or through doorways and bilges.
• To avoid interference with other equipment, you should not
run network and power cables parallel to other cables, such
as radio antenna lines or power cables. If this is not possible,
the cables should be shielded with metal conduit or a form of
EMI shielding.
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