Airmar P19-12 Instruction Manual

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01
rev.
02 04/05
CAUTION : NEVER USE SOLVENTS
Cleaners, fuel, paint, sealants, and other products can
contain strong solvents, such as acetone, which attack
many plastics greatly reducing their strength.
Tilted Element Depth Transducer
Models: P19-12º, P19-20º, B22-12º, B22-20º,
B60-12º, B60-20º, SS565-12º, SS565-20º
Applications
• Plastic housing recommended for fiberglass or metal hulls only .
Never install a plastic thru-hull transducer in a wood hull, since
swelling of the wood may overstress the plastic causing a
fracture.
• Bronze housing recommended for fiberglass or wood hulls.
Never install a bronze housing in a metal hull, because
electrolytic corrosion will occur.
• Stainless steel housing compatible with all hull materials.
Recommended for metal hulls to prevent electrolytic corrosion.
A stainless steel housing must be isolated from a metal hull.
• Never install a metal housing in a vessel with a positive ground
system.
• Be sure your transducer model matches the deadrise angle
of your boat.The top of the transducer is imprinted with the angle
(see Figure 1).
12º models for deadrise angles from 8º to 15º
20º models for deadrise angles from 16º to 24º
To measure the deadrise angle of your hull at the selected
mounting location, use an angle finder or a digital level
(see Figure 2).
Identify Your Model
The model name is printed on the cable tag.
Tools & Materials
Safety goggles
Dust mask
Electric drill with 10mm (3/8") or larger chuck capacity
Drill bit: 3mm
or 1/8"
Hole saw:
P19-12º, P19-20º, B22-12º, B22-20º: 51mm
or 2"
B60-12º, B60-20º, SS565-12º, SS565-20º: 60mm or 2-3/8"
Countersink tool (installing stainless steel housing)
Sandpaper
Mild household detergent
or weak solvent (such as alcohol)
File (installation in a metal hull)
Marine sealant (suitable for below waterline)
Slip-joint pliers (installing a metal housing)
Zip-ties
Water-based antifouling paint ( mandatory in salt water )
Installation in a cored fiberglass hull (see page 3):
Hole saw for hull interior:
P19-12º, P19-20º, B22-12º, B22-20º: 60mm
or 2-3/8"
B60-12º, B60-20º, SS565-12º, SS565-20º: 69mm or 2-3/4"
Fiberglass cloth and resin
or Cylinder, wax, tape, and casting epoxy
IMPORTANT : Please read the instructions completely
before proceeding with the installation. These
instructions supersede any other instructions in your
instrument manual if they differ.
Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz
Figure 2. Deadrise angle
Transom View
deadrise angle
slope of hull
parallel to waterline
Figure 1. Top of transducer
12
O
TILT
KEEL
AIRMAR ®
20
O
TILT
KEEL
AIRMAR ®
P19-12º
12º model 20º model
INSTALLATION INSTRUCTIONSOWNER’S GUIDE &
Copyright © 2005 Airmar Technology Corp. Copyright © 2005 Airmar Technology Corp.

Mounting Location
Placement
Choose a location:
•Away from interference caused by power and radiation sources
such as: the propeller(s) and shaft(s), other machinery, other
echosounders, and other cables. The lower the noise level, the
higher the echosounder gain setting that can be used.
• Where the transducer will be continuously immersed in water.
•Where the transducer beam will be unobstructed by the keel or
propeller shaft(s).
•Where there is a minimum deadrise angle, not exceeding the tilt
angle of your transducer.
Caution : Do not mount in an area of turbulence or bubbles:
Near water intake or discharge openings,
Behind strakes, fittings, or hull irregularities.
Boat Types
(see Figure 3)
• Displacement hull powerboat —Locate 1/3 aft LWL and
150–300mm (6–12") off the centerline on the side of the hull
where the propeller blades are moving downward.
• Planing hull powerboat —Mount well aft, on or near the
centerline, and
well inboard of the first set of lifting strakes to
insure that the transducer is in contact with the water at high
speeds. Mount on the side of the hull where the propeller
blades are moving downward.
Outboard and I/O —Mount just forward of the engine(s).
Inboard —Mount well ahead of the propeller(s) and shaft(s).
Stepped hull —Mount just ahead of the first step.
Boat capable of speeds above 25kn (29MPH)—Review the
installation location and operating results of similar boats before
proceeding.
• Fin keel sailboat —Mount to the side of the centerline and
forward of the fin keel 300–600mm (1–2').
• Full keel sailboat —Locate amidships and away from the keel
at the point of minimum deadrise angle.
Installation
Cored fiberglass hull —Follow separate instructions on page 3.
Hole Drilling
Warning : Always wear safety goggles and a dust mask.
1. Drill a 3 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 outside.
2. Using the appropriate size hole saw, cut a hole from outside of
the hull perpendicular to the hull surface (see “Tools &
Materials” on page 1).
Stainless steel housing —These models require
countersinking the housing to create a “seat” in the hull.
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.
Bedding
Caution : Never pull, carry, or hold the transducer by its cable; this
may sever internal connections.
Apply a 2mm (1/16") thick layer of sealant around the lip of the
housing that contacts the hull and up the sidewall of the housing
(see Figure 4). The sealant
must extend 6mm (1/4") higher than
the combined thickness of the hull, washer(s), and the hull nut.
This will ensure there is sealant in the threads to seal the hull and
to hold the hull nut securely in place.
Stainless steel housing in a metal hull —To prevent electrolytic
corrosion, the stainless steel housing must be isolated from the
metal hull. Slide the isolation bushing onto the housing, then apply
additional sealant to the surfaces of the bushing that will contact
the hull.
Installing
1. From outside the hull, push the housing into the mounting hole using
a twisting motion to squeeze out excess sealant (see Figure 4).
Caution: The arrow on the top of the transducer must point
toward the keel.
2. From inside the hull, point the arrow on the top of the transducer
toward the keel (see Figure 1). This will align the angle of the
element inside the transducer with the deadrise angle of your hull.
3. Slide the washer onto the housing (see Figure 4).
4. Screw the hull nut in place.
Plastic housing — Do not clamp the wrench flats tightly, to
avoid possibly fracturing the housing.
Plastic hull nut — Hand-tighten only. Do not over-tighten.
Bronze hull nut —Tighten with slip-joint pliers.
Wood hull —Allow the wood to swell before tightening the hull nut.
5. Remove any excess sealant on the outside of the hull to ensure
smooth water flow over the transducer.
2
inboard
Figure 3.
pressure waves
1/3 aft
full keel sailboat
displacement hull
(6-12")
fin keel sailboat
150-300mm
LWL
Best location for the transducer
(Load Waterline Length)
stepped hull
outboard and I/O
planing hulls
Copyright © 2005 Airmar Technology Corp.

Cable Routing & Connecting
Caution : If your transducer came with a connector, DO NOT
remove it to ease cable routing. If the cable must be cut and
spliced, use Airmar’s splash-proof Junction Box 33-035 and follow
the instructions provided. Cutting the cable or removing the
connector, except when using Airmar’s junction box, will void the
transducer warranty.
1. Route the cable to the instrument, being careful not to tear the
cable jacket when passing it through the bulkhead(s) and other
parts of the boat. To reduce electrical interference, separate the
transducer cable from other electrical wiring and the engine. Coil
any excess cable and secure it in place using zip-ties to prevent
damage.
2. Refer to the echosounder owner’s manual to connect the
transducer to the instrument.
Checking for Leaks
Warning : Never install a thru-hull transducer and leave the boat in
the water unchecked for several days.
When the boat is placed in the water, immediately check around
the thru-hull transducer for leaks. Note that very small leaks may
not be readily observed. It is best not to leave the boat in the
water for more than 3 hours before checking it again. If there is a
small leak, there may be considerable bilge water accumulation
after 24 hours. If a leak is observed, repeat “Bedding” and
“Installing” immediately (see page 2).
Installation in a Cored Fiberglass Hull
The core (wood or foam) must be cut and sealed carefully. The
core must be protected from water seepage, and the hull must be
reinforced to prevent it from crushing under the hull nut allowing
the housing to become loose.
Warning : Always wear safety goggles and a dust mask.
1. Drill a 3mm or 1/8" pilot hole from inside the hull (see Figure 5).
If there is a rib, strut, or other hull irregularity near the selected
mounting location, drill from the outside. (If the 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 appropriate size outside hull hole saw, cut a hole from
outside the hull through the
outer skin only (see table on page 1).
3. From inside the hull, using the appropriate size hull interior hole
saw, cut through the
inner skin and most of the core (see “Tools &
Materials” on page 1). The core material can be very soft. Apply
only light pressure to the hole saw after cutting through the
inner
skin to avoid accidentally cutting the outer skin.
4. Remove the plug of core material, so the inside of the outer skin
and the inner core of the hull is fully exposed. Sand and clean
the inner skin, core, and the outer skin around the hole.
Caution : Completely seal the hull to prevent water seepage
into the core.
5. If you are skilled with fiberglass, saturate a layer of fiberglass
cloth with a suitable resin and lay it inside the hole to seal and
strengthen the core. Add layers until the hole is the correct
diameter.
Alternatively, a hollow or solid cylinder of the correct diameter
can be coated with wax and taped in place. Fill the gap between
the cylinder and hull with casting epoxy. After the epoxy has set,
remove the cylinder.
6. 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.
7. Proceed with “Bedding” on page 2.
Figure 5. Preparing a cored fiberglass hull
inner skin
core
outer skinsolid or hollow cylinder
pour in
casting
epoxy
9-12 mm
(3/8-1/2")
larger than the
hole through the
hull’s outer skin
hull thickness
Figure 4. Bedding and installing
washer
hull
plastic housing
housing
hull nut
marine sealant
bronze housing
(B22-12º shown)
marine sealant
wrench
3
stainless steel housing
in a metal hull
flats
washer
hull
housing
hull nut
wrench
flats
washer
hull
housing
hull nut
wrench
flats
isolation bushing
(surrounds housing)
marine sealant
Copyright © 2005 Airmar Technology Corp.
Copyright © 2005 Airmar Technology Corp.

Maintenance, Repair & Replacement
Antifouling Paint
Surfaces exposed to salt water must be coated with antifouling
paint. Use water-based antifouling paint only. Never use ketone
based antifouling paint, since ketones can attack many plastics
possibly damaging the transducer. Apply antifouling paint every
6 months or at the beginning of each boating season.
Cleaning
Aquatic growth can accumulate rapidly on the transducer’s
surface, reducing its performance within weeks. Clean the surface
with a Scotch-Brite® scour pad and mild household detergent,
being careful to avoid making scratches. If the fouling is severe,
lightly wet sand it with fine grade wet/dry paper.
Replacement Parts
Lost, broken, and worn parts should be replaced immediately.
Airmar is a build-to-order factory and does not have parts in stock.
Obtain parts from your marine dealer or instrument manufacturer.
Transducer Replacement
The information needed to order a replacement transducer is printed
on the cable tag.
Do not remove this tag. When ordering, specify the
part number, date, and frequency in kHz. For convenient reference,
record this information on the top of page one.
Model Hull Nut Washer Isolation
Bushing
P19-12º
P19-20º 04-004 09-452 —
B22-12º
B22-20º 02-030 09-452 —
B60-12º
B60-20º 02-133-01 09-813-01 —
SS565-12º
SS565-20º 02-563-01 09-813-01 04-589-01
AIRMAR
TECHNOLOGY CORPORATION
35 Meadowbrook Drive, Milford, New Hampshire 03055-4613, USA
■
www.airmar.com
Copyright © 2003, 2005 Airmar Technology Corporation. All rights reserved.
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