Furuno FELCOM251, Installation Manual

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2. INSTALLING THE SYSTEM
2-19
2.3.6 Mounting the Antenna Unit
The radome can now be installed on the ship with 4 stainless steel bolts fastened to
the hull or to a mast.
For information on mast mounting, see section 2.2.4.
Mounting the FELCOM501 Antenna Unit on the hull
Make sure the antenna has line of sight to the satellites. When the antenna is mounted
directly on the hull, it may be difficult to obtain line of sight, especially down to - 25°,
which is the maximum rotation angle (pitch and roll) for the antenna unit.
Use M10 bolts for mounting the FELCOM501.
The bolt thread must not penetrate more than 25 mm (or 16 turns of the bolt) – and
not less than 10 mm (or 6 turns of the bolt) – into the threaded part of the bushings in
the antenna. Fasten the bolts with 30 ±5 Nm torque.
The only electrical connector is a single N-connector in the center bottom of the ra-
dome.
Important: Make sure there is free space between the drain tube and the mounting
surface so water can escape.
Mounting the FELCOM251 Antenna Unit on the hull
Make sure the antenna has line of sight to the satellites. When the antenna is mounted
directly on the hull, it may be difficult to obtain line of sight, especially down to - 60°,
which is the maximum rotation angle (pitch and roll) for the FELCOM251 Antenna
Unit.
Use M6 bolts for mounting the FELCOM251 Antenna Unit.
The bolt thread must not penetrate more than 12 mm (or 8 turns of the bolt) – and not
less than 6 mm (or 4 turns of the bolt) – into the threaded part of the bushings in the
radome. Fasten the bolts with 7-8 Nm torque.
The only electrical connector is a single TNC-connector in the bottom of the radome.
Important: Do not block the drainage hole in the center bottom of the antenna.
Drainage hole.
Do not block!