Airmar B22 - User Manual

low profile
P319
17-006-01 rev. 11 01/26/11
Thru-Hull, Depth
Transducer
Low Profile, Flush, and Retractable Models
Applications
• Plastic housing recommended for fiberglass or metal hull only.
Never install a plastic transducer in a wood hull, since swelling
of the wood can possibly fracture the plastic.
• Bronze housing recommended for fiberglass or wood hull.
Never install 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 a 20° deadrise angle.
Tools & Materials
Safety goggles
Dust mask
Electric drill with 10mm (3/8") or larger chuck capacity
Drill bit: 3mm or 1/8"
Hole saw (see table opposite)
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 metal housing)
Grommet(s) (some installations)
Cable ties
Water-based anti-fouling paint (mandatory in salt water)
Installation in a cored fiberglass hull (see page 4):
Hole saw for hull interior: (see table on this page)
Fiberglass cloth and resin
or Cylinder, wax, tape, and casting epoxy
Identify Your Model
The model name is printed on the cable tag.
Model
(Housing)
Minimum
Headroom
Outside Hull
Hole Saw Size
Cored Fiberglass Hull
Hull Interior
Hole Saw Size
Low Profile:
B22, B117,
P19, P319
95 mm (3-3/4") 51 mm or 2" 60 mm or 2-3/8"
P5 161mm 6-3/8”) 51 mm or 2" 60 mm or 2-3/8"
Flush:
B21, P219, P269
100 mm (4") 51 mm or 2" 60 mm or 2-3/8"
Retractable:
B17, B21
P17, P217, P314
200 mm (8") 51 mm or 2" 60 mm or 2-3/8"
Retractable:
SS577
200 mm (8")
51 mm or 2"
in a fiberglass or
wood hull
57 mm or 2-1/4"
in a metal hull
60 mm or 2-3/8"
Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz
INSTALLATION INSTRUCTIONSOWNER’S GUIDE &
retractable
low profile
B17
P219
flush
WARNING: Always wear safety goggles and a dust
mask when installing to avoid personal injury.
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: Retractable models—The O-rings must
be intact and well lubricated to make a watertight seal.
WARNING: Retractable models—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: B117 and P319—Do not use the spacer
if there is insufficient space to tighten the nut or it is
within 11mm (1/2") of the top of the housing.
WARNING: Stainless steel housing in 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 pull, carry, or hold the transducer 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: Plastic housing—Never use a fairing with
a plastic housing; the protruding sensor would be
vulnerable to damage from impact.
CAUTION: Metal housing—Never install a metal
housing on a vessel with a positive ground system.
CAUTION: Stainless steel housing in metal hull—
Stainless steel 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.

Summary

Transducer Overview and Preparation

Applications

Details on suitable hull materials and deadrise angles for transducer types.

Tools & Materials

Lists necessary tools and materials for installation.

Identify Your Model

Guide to identify the specific transducer model from cable tag.

Installation Process

Mounting Location

Guidance on selecting the optimal mounting position on the hull.

Hole Drilling

Instructions for drilling the necessary holes for transducer installation.

Bedding

Procedures for applying sealant to ensure a watertight seal.

Installing

Steps for physically installing the transducer housing and nut.

Specific Installation Procedures

Retractable Models

Detailed installation steps for retractable transducer models.

Cable Routing & Connecting

Guidelines for routing transducer cables and making connections.

Checking for Leaks

Procedure to check for water leaks after installation.

Installation in a Cored Fiberglass Hull

Specific instructions for installing in cored fiberglass hulls.

Maintenance and Parts

Anti-fouling Paint

Recommendations for applying anti-fouling paint to transducer surfaces.

Cleaning

Methods for cleaning transducer surfaces to maintain performance.

Retractable Models: Blanking Plug

Instructions for handling the blanking plug on retractable models.

Replacement Transducer & Parts

Information on ordering replacement parts and transducers.

Airmar B22 Specifications

General

Frequency	200 kHz
Power	600 W
Material	Bronze
Mounting Style	Thru-hull
Operating Voltage	10-20 V DC
Operating Temperature	-15°C to +50°C