Furuno FELCOM251, Installation Manual

Page: 21 / 122

2. INSTALLING THE SYSTEM
2-8
FELCOM251 Antenna Unit (FB-1251) - mast mounting
• Mounting with the optional Mast Mount Kit (403742A-920-FUR):
The mast mount kit interfaces to a 1.5” pipe (OD 48.3 mm). If the supplied plastic
sleeve is omitted, a maximum diameter OD of 52 mm can be used.
• Mounting without the optional kit:
For a custom mast mounting, use 4 M6 bolts (A4) in the threaded bushings on the
175.4 mm diameter circle in the bottom of the antenna (see the outline drawing at
the end of this manual). The length of the bolts must be such that they engage into
the bushings of the radome with min. 6 mm and max. 12 mm.
Important: Do not block the drainage hole in the center bottom of the antenna.
Drill a hole for the cable in the mast flange or use an angled connector.
Use a screwdriver, or similar tool, with a
4 mm diameter to fold the grounding foil.
M6×16
(Recommended
torque: 8N•m)
M6×16
(Recommended
torque: 8N•m)
Recommended
torque: 30N•m
If sleeve is not
used, a tube
with a max. OD
of Ø52 mm can
be used.
Mast: 1.5 inch
(OD Ø48.3 mm)
Grounding
foil
Drainage hole.
Do not block!