GMR
™
420/620/1220/2520
XHD2 SERIES
INSTALLATION
INSTRUCTIONS
Important Safety Information
WARNING
Failure to follow these warnings, cautions, and notices could result in personal
injury, damage to the vessel or device, or poor product performance.
See the Important Safety and Product Information guide in the product box for
product warnings and other important information.
The radar transmits electromagnetic energy. To avoid possible personal injury,
damage to the vessel or device, or poor product performance, ensure that the
radar is installed according to the recommendations in these instructions and
that all personnel are clear of the path of the radar beam before transmitting.
When properly installed and operated, the use of this radar conforms to the
requirements of ANSI/IEEE C95.1-1992 Standard for Safety Levels with
Respect to Human Exposure to Radio Frequency Electromagnetic Fields.
To avoid possible personal injury, do not look directly at the antenna at close
range when the radar is transmitting. Eyes are the most sensitive part of the
body to electromagnetic energy.
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.
CAUTION
This device should be used only as a navigational aid. Using the device for
any purpose requiring precise measurement or direction, distance, location, or
topography may result in personal injury or damage to the vessel.
To avoid possible personal injury, always wear safety goggles, ear protection,
and a dust mask when drilling, cutting, or sanding.
Opening the device may result in personal injury and/or damage to the device.
This device contains no user-serviceable parts, and should be opened only by
a Garmin
®
authorized service technician. Any damage resulting from opening
the unit by anyone other than a Garmin authorized service technician will not
be covered by the Garmin warranty.
NOTICE
When drilling or cutting, always check what is on the opposite side of the
surface to avoid damaging the vessel.
Software Update
You may need to update the device and chartplotter software when you install
this device. See your Garmin chartplotter owner's manual for the full software-
update instructions.
Tools Needed
• #2 Phillips screwdriver
• 5 mm hex wrench
• Drill and 15.0 mm (
19
/
32
in.) drill bit
• 17 mm (
21
/
32
in.) wrench and torque wrench
• A length of 3.31 mm² (12 AWG) copper wire to ground the radar housing
(and voltage converter, if applicable).
• Marine sealant
Mounting Considerations
When selecting a mounting location, observe these considerations.
• It is highly recommended that the device is mounted out of range of
people, with the vertical beam width above head height. To avoid exposure
to harmful radio frequency (RF) levels, the device should not be mounted
closer to people than the maximum safe distance value listed in the
product specifications.
• The device should be mounted high above the ship’s keel line with minimal
blockage of the radar beam. Obstructions may cause blind and shadow
sectors or generate false echoes. The higher the installation position, the
farther the radar can detect targets.
• The device should be mounted on a flat surface or a platform that is
parallel to the vessel's water line and is sturdy enough to support the
device's weight. The weight for each model and antenna is listed in the
product specifications.
• The device must be mounted in a location where it can be connected to
power, water ground, and the Garmin Marine Network (Wiring and
Connection Considerations, page 2).
• The radar beam spreads vertically 11.5° above and 11.5° below the
radar's radiating element. On vessels with higher bow angles at cruise
speed, the installation angle can be lowered to point the beam slightly
downward to the waterline while at rest. Shims can be used if necessary.
• The device should be mounted away from heat sources, such as smoke
stacks and lights.
• The device should be mounted at a different level than horizontal
spreaders and mast crosstrees.
• To avoid interference with a magnetic compass, the device should not be
mounted closer to a compass than the compass-safe distance value listed
in the product specifications.
• Other electronics and cables should be mounted more than 2 m (6.5 ft.)
from the radar beam path.
• GPS antennas should be either above or below the radar beam path.
• The device should be mounted at least 1 m (40 in.) from any transmitting
equipment.
• The device should be mounted at least 1 m (40 in.) away from cables
carrying radio signals such as VHF radios, cables, and antennas.
• The device should be mounted at least 2 m (6.5 ft.) away from Single Side
Band (SSB) radios.
Installation Procedures
Preparing the Surface and the Radar for Mounting
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 under the power and network connectors
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.
Printed in Taiwan
May 2020
190-01818-91_0C
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