Airmar DST800 - User Manual

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Applications

• Plastic housing recommended for fiberglass or metal hull only.

Never install a plastic housing in a wood hull since swelling of

the wood may overstress the plastic causing a fracture.

• Bronze housing recommended for fiberglass or wood hull.

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 hull to prevent electrolytic corrosion

provided the stainless steel housing is isolated from the metal

hull.

• Accommodates up to 22° deadrise angle

Tools & Materials

Safety goggles

Dust mask

Water-based anti-fouling paint (mandatory in salt water)

Electric drill with 10mm (3/8") or larger chuck capacity

Drill bit: 3mm or 1/8"

Hole saw: 51mm or 2"

(plastic or metal housing in non-metal hull)

57mm or 2-1/4" (stainless steel housing in a metal hull)

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)

Grommet(s) (some installations)

Cable 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

17-355-01 rev. 06 12/14/10

Thru-Hull, Retractable

TRIDUCER

Multisensor

Model DST800

U.S. Patents: 6,904,798; 7,110,908; 7,352,171. UK Patents: 2 407 874; 2 409 527

Record the information found on the cable tag for future reference.

Part No._________________Date___________Frequency________kHz

plastic

low profile

P17 housing

INSTALLATION INSTRUCTIONSOWNER’S GUIDE &

Pretest

Connect the multisensor to the instrument and spin the

paddlewheel. Check for a speed reading and the approximate air

temperature. If there are no readings or they are inaccurate, check

all the connections and repeat the test. If there are still no readings

or they are inaccurate, return the product to the place of purchase.

WARNING: Always wear safety goggles and a dust

mask when installing to avoid personal injury.

WARNING: The O-rings must be intact and well

lubricated to make a watertight seal.

WARNING: Always attach the safety wire to prevent

the insert or blanking plug from backing out in the

unlikely event that the cap nut fails or is screwed on

incorrectly.

WARNING: Immediately check for leaks when the

boat is placed in the water. Do not leave the boat

unchecked for more than three hours. Even a small

leak may allow considerable water to accumulate.

WARNING: Stainless steel housing in a metal hull—

Be sure the washer contacts the hull. Do not tighten

the hull nut with the washer against the isolation

bushing, as the housing will not be firmly installed. If

necessary, sand the isolation bushing until the washer

rests against the hull.

CAUTION: Never install a metal multisensor on a

vessel with a positive ground system.

CAUTION: Never use a fairing with a plastic housing;

the protruding sensor would be vulnerable to damage

from impact.

CAUTION: Never pull, carry, or hold the multisensor

by its cable; this may sever internal connections.

CAUTION: Never use solvents. Cleaners, fuel,

sealants, paint, and other products may contain strong

solvents, such as acetone, which attack many

plastics, greatly reducing their strength.

CAUTION: Stainless steel housing must be isolated

from a metal hull to prevent electrolytic corrosion. Use

the isolation bushing supplied.

IMPORTANT: Read the instructions completely

before proceeding with the installation. These

instructions supersede any other instructions in your

instrument manual if they differ.

Need help?

Do you have a question about the Airmar DST800 and is the answer not in the manual?

Summary

Installation Instructions

Pre-Installation Test

Verify multisensor readings before final installation.

Multisensor Application Guide

Recommended hull types and materials for multisensor installation.

Installation Tools and Materials

List of tools and materials needed for installation.

Hull Type Mounting Guidance

Guidance on mounting locations for different boat hull types.

Optimal Multisensor Mounting Location

Criteria for selecting the best location for multisensor installation.

Anti-fouling Paint Application

Instructions for applying anti-fouling paint to the multisensor.

Multisensor Hole Drilling

Steps for drilling pilot and main holes for the multisensor.

Housing Bedding and Sealing

Apply marine sealant to ensure a watertight seal around the housing.

Multisensor Housing Installation

Detailed instructions for physically installing the multisensor housing.

Water Leak Detection

Procedure to check for water leaks after boat is in water.

Cored Fiberglass Hull Installation Guide

Specific steps for installing in cored fiberglass hulls.

Maintenance, Parts, and Replacement

Blanking Plug Usage and Storage

Instructions for using the blanking plug for protection and storage.

Multisensor Insert Maintenance

How to clean or replace the paddlewheel and O-rings.

Winter Storage for Multisensor

Steps for preparing the multisensor for winter storage.

Replacement Parts and Ordering Information

Information on ordering replacement multisensors and parts.