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GMR™ 420/620/1220 xHD2 Series 

Installation Instructions

To obtain the best performance and to avoid damage to your 

boat, install the device according to these instructions.
Read all installation instructions before proceeding with the 

installation. If you experience difficulty during the installation, 

contact Garmin

®

 Product Support.

Important Safety Information

 WARNING

See the 

Important Safety and Product Information

 guide in the 

product box for product warnings and other important 

information.
The radar transmits electromagnetic energy. 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.
When the radar is transmitting, do not look directly at the 

antenna at close range; 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 will void the product warranty.

 CAUTION

This device should be used only as a navigational aid. Do not 

attempt to use the device for any purpose requiring precise 

measurement of direction, distance, location, or topography.
Always wear safety goggles, ear protection, and a dust mask 

when drilling, cutting, or sanding.

NOTICE

When drilling or cutting, always check what is on the opposite 

side of the surface.

Registering Your Device

Help us better support you by completing our online registration 

today.
• Go to 

http://my.garmin.com

.

• Keep the original sales receipt, or a photocopy, in a safe 

place.

Contacting Garmin Product Support

• Go to 

www.garmin.com/support

 and click 

Contact Support 

for in-country support information.

• In the USA, call (913) 397.8200 or (800) 800.1020.
• In the UK, call 0808 2380000.
• In Europe, call +44 (0) 870.8501241.

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 is 

listed in the product specifications.

• The radar beam spreads vertically 11.5° above and 

11.5° below 

À

 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.

Preparing the Surface and the Radar for 

Mounting

Before you can mount the radar, you must choose a suitable 

mounting location (

Mounting Considerations

).

1

Select an option:
• If you are using a pre-drilled Garmin compatible Furuno

® 

or Raymarine

®

 mount, proceed to step 3.

October 2014

Printed in Taiwan

190-01818-02_0A

Содержание GMR 620 xHD2 Series

Страница 1: ...Drill and 15 0 mm 19 32 in drill bit 17 mm 21 32 in wrench and torque wrench A length of 3 31 mm 12 AWG copper wire to ground the radar housing and voltage converter if applicable Marine sealant Mount...

Страница 2: ...o the four raised locations on the bottom of the pedestal Mounting the Radar Before you can mount the radar you must first select a mounting location and prepare the mounting surface and the radar Pre...

Страница 3: ...er Cable Extensions Incorrectly extended runs of cable may cause the radar to malfunction due to insufficient power transmission Connecting to Power Through the Voltage Converter WARNING When connecti...

Страница 4: ...ing is necessary If your radar was packaged with a voltage converter proceed to step 6 6 Route a different 3 31 mm 12 AWG copper wire to water ground location and to the voltage converter 7 Loosen a s...

Страница 5: ...of Boat Offset The front of boat offset compensates for the physical location of the radar scanner on a boat if the radar scanner does not align with the bow stern axis Measuring the Potential Front o...

Страница 6: ...m 49 ft 3 in Network cable length 15 m 49 ft 3 in Antenna rotation speed 24 rpm and 48 rpm Max wind load 80 kn Temperature range From 15 to 70 C 5 to 158 F Humidity 95 at 35 C 95 F Water resistance I...

Страница 7: ...he inline fuse may have blown Check the fuse and replace it if necessary The wire gauge used to extend the power cable may be too small for the length of the extension Check the table provided in the...

Страница 8: ...r countries GMR is a trademark of Garmin Ltd or its subsidiaries These trademarks may not be used without the express permission of Garmin Furuno is a registered trademark of Furuno Electric Co Ltd Ra...

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