Vetus COMBI4 Manual De Manejo Y Instrucciones De Instalación página 25

5.2.5 Installation
Hole Drilling
Warning
Always wear safety goggles and a dust
mask.
1 Drill a  mm or 1/8" pilot hole from
inside the hull. If there is a rib, strut or
other hull irregularity near the selected
mounting location, drill from the out-
side.
2 Using a 51 mm or 2" hole saw, cut a
hole from outside the hull.
 Sand and clean the area around the
hole, inside and outside, to ensure that
the sealant will adhere properly to the
hull. If there is any petroleum residue
inside the hull, remove it with either
mild household detergent or a weak
solvent (alcohol) before sanding.
Remove all burrs with a file and sand-
paper.
Bedding
Caution
Apply a 2 mm (1/16") thick layer of marine
sealant around the lip of the housing that
contacts the hull and up the sidewall of the
housing (see Figure 3). The sealant must
extend 6 mm (1/4") higher than the com-
bined thickness of the hull, the washer(s),
and the hull nut. This will ensure there is
marine sealant in the threads to seal the
hull and to hold the hull nut securely in
place.
Installing
Caution
Never pull, carry, or hold the sensor by
the cable as this may sever internal con-
nections.
COMBI 4
BOW
8
1 Insert
2 Cap nut
 Housing
4 Safety wire
5 Hull nut
1 From outside the hull, push the housing
into the mounting hole using a twisting
motion to squeeze out excess marine
sealant (see figure).
Align the arrow on the lip of the housing to
point forward toward the bow.
If the sensor is not installed on the cen-
treline of the boat, angle the housing
slightly toward the centreline to align it
with the water flow.
2 From inside the hull, slide the washer
onto the housing.
Hull less than 6 mm (1/4") thick
- Use an additional rubbery, fibreglass,
or plastic washer.
Never use bronze since electrolytic corro-
sion will occur.
Never use wood since it will swell, possi-
bly fracturing the plastic housing.
 Screw the hull nut in place being sure
the arrow on the lip of the housing
is still positioned forward toward the
bow.
ENGLISH
1
2
3
4
5
6
7
6 Washer
7 Hull
8 Marine sealant
on lip and side-
wall of housing
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