Raymarine DSM250, Owner'S Handbook Manual

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2-8 DSM250 Digital Sounder Module
2.5 Mounting the Sounder Module
The DSM250 can be installed either above or below deck using
the supplied hardware.
CAUTION:
Do not mount the DSM250 in the engine compartment.
To allow for proper water drainage and ease of cable connection,
the DMS250 should be mounted vertically, so that the cables can
hang below the unit, as in
Figure 2-4 .
To mount the DSM250:
1. Hold the module in the location where you want to mount it, mak-
ing sure the unit is perpendicular to the floor, as in Figure 2-4 .
2. With a pencil, mark the tops (narrow ends) of the four key holes
onto the mounting surface. Set aside the module.
3. Drill a 9/64" pilot hole at each of the four marked locations.
Note: For fiberglass with a gelcoat surface, you should overdrill
the surface to prevent the gelcoat from chipping when driving in
the screw. Before drilling the pilot hole, hand drill the marked lo-
cation with an oversized bit and countersink to approximately
3/8
" diameter.
4. Drive the supplied #
8
screws into the pilot holes. Screw them in
about half way.
5. Mount the module to the surface, slipping the screw heads
through the four key holes.
6. Press the module downward so the screws align with the narrow
end of the keyholes.
7. Tighten the screws. Do not overtighten.