OWNER'S GUIDE & INSTALLATION INSTRUCTIONS TRIDUCER® Multisensor with Valve Models: B744V, B744VL, B66V, B66VL, and SS544V U.S. Patents: 4,898,029; 5,186,050, Re 33,982. Australian Patent 605,281 Canadian Patent 1,313,775. Japanese Patent 1851014. Record the information found on the cable tag for future reference. Part No._________________Date___________Frequency________kHz B744V IMPORTANT: Please read the instructions completely before proceeding with the installation. These instructions supersede any other instructions in your instrument manual if they differ. 11/03 B744V Standard Fairing 17-118-03 rev. 03 WARNING: B744V and B744VL These models must be installed with a fairing (standard or high-performance). If the multisensor is installed without a fairing, there is insufficient surface area to seal the multisensor to the hull. Water may leak into the hull causing damage to the boat or possibly sinking. Tools and Materials Fairing (mandatory for B744V, B744VL, SS544V) Digital level or bubble level & protractor (installation with fairing) Safety goggles Dust mask Band saw or hand saw (installation with fairing) Rasp or power tool (installation with fairing) Electric drill Drill bit: 3mm or 1/8" Hole saw: 51mm or 2" Sandpaper Mild household detergent or weak solvent (alcohol) File (installation in a metal hull) Marine sealant Slip-joint pliers Zip-ties Water-based antifouling paint (mandatory in salt water) Installation in a cored fiberglass hull (see page 4): Hole saw for hull interior: 60mm or 2-3/8" Cylinder, wax, tape, and casting epoxy WARNING: B744V, B744VL and SS544V with a high-performance fairing These models must be installed following the supplemental instructions that came with the high-performance fairing. A high-performance fairing requires an anti-rotation bolt. Failure to install the anti-rotation bolt may result in the fairing rotating while the boat is underway. The effect may be violent movement and loss of steering. This could result in serious injury or death to passengers and/or damage to the boat or other property. 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. Mounting Location Acoustic Noise Acoustic noise is always present and these sound waves can interfere with the operation of the transducer. Background noise from sources such as: waves, fish, and other vessels cannot be controlled. However, carefully selecting the multisensor's mounting location can minimize the affect of vessel generated noise from the propeller(s) and shaft(s), other machinery, and other echosounders. The lower the noise level, the higher the echosounder gain setting that can be used. Applications · Bronze housings recommended for fiberglass or wood hulls. Caution: Never install a bronze housing in a metal hull because electrolytic corrosion will occur. · Stainless steel housing is compatible with all hull materials. · Aluminum or steel hull--Use a stainless steel housing to prevent electrolytic corrosion. Caution: Installation requires an Airmar fairing and an isolation sleeve. · Caution: Never install a metal housing in a vessel with a positive ground system. Placement Choose a location where: · The water flowing across the hull is smoothest with a minimum of turbulence and bubbles (especially at high speeds). · The multisensor will be continuously immersed in water. · There is a minimum deadrise angle. · The transducer beam will be unobstructed by the keel or propeller shaft(s). · There is adequate headroom inside the vessel for the height of the housing, tightening the nuts, and removing the valve assembly and insert. Pretest Connect the multisensor to the instrument and spin the paddlewheel. Check for a speed reading (and the approximate air temperature if applicable). If there is no reading or it is inaccurate, return the instrument to the place of purchase. Identify Your Model The model name is printed on the cable tag. Caution: Do not mount the multisensor: Near water intake or discharge openings Behind strakes, fittings, or hull irregularities Behind eroding paint (an indication of turbulence) AIRMAR ® About Fairings pressure waves 1/3 aft LWL (Load Waterline Length) displacement hull 150­300mm (6­12") Nearly all vessels have some deadrise angle at the mounting location. If the multisensor is mounted directly to the hull, the sound beam will be tilted off the vertical at the same angle as the deadrise. A fairing is strongly recommended if the deadrise angle exceeds 10°(see Figure 2). · Increases the sealing surface around the drilled hole to prevent water from leaking into the hull. · Orients the sound beam straight down by mounting the multisensor parallel to the water surface · Minimizes aerated water flowing over the transducer's face by mounting it deeper in the water outboard and I/O planing hulls inboard · High-performance fairing has a long streamlined shape for excellent performance above 15 knots (see Replacement Parts on page 6). Airmar Polymer Fairing step-hull Made of a high impact polymer with an integrated cutting guide, an Airmar fairing is safer and easier to cut with a band saw and shape with hand tools than custom fairings. It can be shaped to accommodate a deadrise angle of up to 25°. (For fairing part numbers, see "Replacement Parts" on page 6.) fin keel sailboat A backing block is used inside the hull to provide a level surface for the hull nut to seat against (see Figure 2). It is fabricated matching the interior deadrise angle of the boat. After cutting an Airmar fairing, use the remaining section with the cutting guide as the backing block. full keel sailboat Installation (for Standard Fairing Only) WARNING: B744V, B744VL, and SS544V with a high-performance fairing must be installed following the supplemental instructions that came with your high-performance fairing. The high-performance fairing requires an anti-rotation bolt. Failure to install the anti-rotation bolt may result in the fairing rotating while the boat is underway. The effect may be violent movement and loss of steering. This could result in serious injury or death to passengers and/or damage to the boat or other property. WARNING: B744V and B744VL must be installed with a fairing (standard or high-performance). If it is installed without a fairing, there is insufficient surface area to seal the sensor to the hull. Water may leak into the hull causing damage to the boat or possibly sinking. CORED FIBERGLASS HULL--Follow separate instructions on page 4. Figure 1. Best location for the multisensor Boat Types (see Figure 1) · Displacement hull powerboat--Locate 1/3 aft LWL and 150­300mm (6­12") off the centerline on the side of the hull where the propeller is moving downward. · Planing hull powerboat--Mount well aft near the centerline and well inboard of the first set of lifting strakes to insure that it is in contact with the water at high speeds. Mount on the side of the hull where the propeller is moving downward. Outboard and I/O--Mount forward and to the side of the engine(s). Inboard--Mount well ahead of the propeller(s) and shaft(s). Step-hull--Mount just ahead of the first step. Boats capable of speeds above 25kn (29MPH)--Review multisensor location and operating results of similar boats before proceeding. · Fin keel sailboats--Mount to the side of the centerline and forward of the fin keel 300­600mm (1­2'). · Full keel sailboats--Locate amidships and away from the keel at the point of minimum deadrise angle. Hole Drilling Warning: Always wear safety goggles and a dust mask. 1. Drill a 3mm or 1/8" pilot hole perpendicular to the waterline from inside the hull (see Figure 3). If there is a rib, strut, or other hull irregularity near the selected mounting location, drill from the outside. If the pilot hole is drilled in the wrong location, drill a second hole in a better location. Apply masking tape to the outside of the hull over the incorrect hole and fill it with epoxy. 2. Using the 51mm or 2" hole saw, cut a hole from outside the hull. Be sure to hold the drill plumb, so the hole will be perpendicular to the water surface. 3. 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. Metal hull--Remove all burrs with a file and sandpaper. Headroom Allow adequate headroom inside the vessel for the height of the housing, tightening the nuts and removing the insert. Model B744V B744VL B66V B66VL SS544V 2 Min. no fairing -- -- 270mm (105/8") 394mm (151/2") -- Min. with fairing 255mm (10") 381mm (15") 255mm (10") 381mm (15") 230mm (9") Cutting the Standard Fairing 1. Measure the deadrise angle of the hull at the selected location using a digital level, or bubble level and protractor (see Figure 2). 2. Tilt the band saw table to the measured angle and secure the cutting fence (see Figure 4). 3. Place the fairing on the table, so the cutting guide rests against the fence. The arrow will point toward you for installation on the port side and away from you for installation on the starboard side of the boat (see Figures 4 and 5). backing block hull AIRMAR ® slope of hull deadrise angle parallel to waterline fairing Note: The ARROW always points forward toward the bow. Be sure to orient the fairing on the band saw so the angle cut matches the intended side of the hull and not the mirror image. 4. Adjust the cutting fence. The fairing must be between 6­12mm (1/4­1/2") at its thinnest dimension (see Figure 2). fairing thickness at thinnest point 6­12mm (1/4­1/2") multisensor Figure 2. Deadrise angle & fairing thickness (B744V shown) AIRMAR stem hull nut Warning: Always wear safety goggles and a dust mask. 5. Recheck steps 1 through 4. Then cut the fairing. 6. Shape the fairing to the hull as precisely as possible with a rasp or power tool. 7. Use the remaining section of the fairing for the backing block. cap nut ® backing block hull fairing Bedding the Housing 1. Apply a 2mm (1/16") thick layer of marine sealant over the surface of the multisensor housing that will contact the fairing (or hull if no fairing is used) and up the stem, 6mm (1/4") higher than the combined thickness of the fairing, hull, backing block, and hull nut (see Figure 3). This will ensure there is marine sealant in the threads to seal the hull and hold the hull nut securely in place. 2. Slide the fairing (if used) onto the stem and mate the button with the recess in the housing (see Figure 5). 3. Apply a 2mm (1/16") thick layer of marine sealant to the side of the fairing (if used) that will contact the hull (see Figure 3). 4. Apply a 2mm (1/16") thick layer of marine sealant to the side of the backing block (if used) that will contact the hull. marine sealant Figure 3. Drilling and bedding (B744V shown) band saw table cutting guide Installing the Housing Caution: Never strike the multisensor. 1. From outside the hull, push the stem of the multisensor housing (with the fairing in place if used) through the mounting hole using a twisting motion to squeeze out excess sealant (see Figure 3). If an Airmar fairing is used, be sure the button on the fairing is mated with the recess in the multisensor, the arrow on the fairing is pointing forward. Take care to align the assembly parallel to the centerline of the boat (see Figure 5). 2. From inside the hull, slide the backing block (if used), hull nut, and cap nut along the cable. Slide the backing block onto the stem and seat it firmly against the hull. Screw the hull nut in place. Tighten it with slip-joint pliers (see Figure 3). Wood hull--Allow for the wood to swell. deadrise angle fence end with arrow for installation on port side Figure 4. Cutting the fairing AIRMAR ® AIRMAR ® BOW cutting guide Caution: Be careful to avoid cross threading the cap nut. 3. Being sure the valve assembly is seated firmly in the housing, carefully screw the cap nut in place. HAND-TIGHTEN only. Do not over tighten. 4. Remove any excess sealant on the outside of the fairing and hull to ensure smooth water flow over the multisensor. button recess in housing Figure 5. Airmar urethane fairing (B744V shown) 3 AIRMAR ® top view of paddlewheel insert Warning: Always attach the safety wire to prevent the insert from backing out in the unlikely event that the cap nut fails or is screwed on incorrectly. 5. Attach the safety wire. Wrap one end of the safety wire tightly around the stem of the housing and twist it together with the long end. Lead the wire straight up and through one eye in the cap nut, then through the safety ring. Loop the wire through the pull ring and twist it securely to itself. notches blanking plug pull ring BOW ...