Furuno DT800V Owner's Manual

OWNER' S GUIDE
Retractable Thru-hull
Depth & Temperature Transducer
Models: DT800, DT800V
IMPORTANT: Please read the instructions completely
before proceeding with the installation. These
instructions supersede any other instructions in your
instrument manual if they differ.
CAUTION: NEVER USE SOLVENTS!
Cleaners, fuel, paint, sealants, and other products may
contain strong solvents, such as acetone, which attack
many plastics greatly reducing their strength.
Applications
• Plastic housing recommended for fiberglass or metal hulls only.
Never install a plastic housing in a wood hull since swelling of
the wood can possibly fracture the plastic.
• Bronze housing recommended for fiberglass or wood hulls.
Never mount a bronze housing in an aluminum hull because
electrolytic corrosion will occur.
• Stainless steel housing compatible with all hull materials.
Recommended for aluminum hulls to prevent electrolytic corrosion
provided the stainless steel housing is isolated from the metal hull.
• Never install a metal housing in a vessel with a positive ground
system.
Tools & Materials
Water-based antifouling paint ( MANDATORY IN SALT WATER )
Safety goggles
Dust mask
Electric drill with 10mm (3/8") or larger chuck capacity
3mm or 1/8"
Drill bit:
Hole saw: 51mm or 2" (plastic or bronze housing)
57mm or 2-1/4"
Countersink tool (installing a flush housing)
Sandpaper
Mild household detergent or weak solvent (such as alcohol)
File (installation in a metal hull)
Marine sealant (suitable for below waterline)
Additional washer [for aluminum hull less than 6mm (1/4") thick]
Slip-joint pliers (installing a bronze housing)
Zip-ties
Installation in a cored fiberglass hull (see page 3):
Hole saw for hull interior: 60mm or 2-3/8"
Fiberglass cloth and resin
or Cylinder, wax, tape, and casting epoxy
(stainless steel housing in a metal hull)
& INSTALLATION INSTRUCTIONS
Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz
Fairing
Caution: Never use a fairing with a plastic housing; the protruding
transducer would be vulnerable to damage from impact.
Antifouling Paint
Aquatic growth can accumulate rapidly on the transducer's surface
reducing performance within weeks. Surfaces exposed to salt water
must be coated with antifouling paint. Use WATER-BASED
antifouling paint only. Never use ketone-based paint, since ketones
can attack many plastics possibly damaging the transducer.
It is easier to apply
antifouling paint before
installation, but allow
sufficient drying time.
Reapply paint every 6
months or at the
beginning of each boating
season. Paint the
following surfaces
(see Figure 1):
• Outside wall of the
insert below the lower
O-ring
• Exposed end of the
insert
• Bore of the housing up
30mm (1-1/4")
• Exterior lip of the
housing
• Blanking plug below the
lower O-ring including
the exposed end
DT800
in a plastic
l
ow-profile housing
insert
outside wall
below lower
O-ring
exposed end
housing
exterior lip
of housing
inside bore of
housing up 30mm (1-1/4")
Figure 1. Antifouling paint
DT800V shown