Airmar B744V User Manual

Junction Box Kit

INSTALLATION INSTRUCTIONS

for Replacement Speed/Temperature Insert

Models: B44V, B66VL, B744V, B744VC, B744VL, B744VLC

WARNING: Always wear safety goggles and a dust mask when installing to avoid personal injury.

CAUTION: High Voltage Charge

The depth transducer may be storing a high voltage charge. Accidental discharge could destroy the speed sensor.

IMPORTANT: Read the instructions completely

17-033-02 rev. 07 12/14/10

before proceeding with the installation. These instructions supersede any other instructions in your instrument manual if they differ.

Applications

• These instructions are for a replacement speed/temperature insert only. Installing a new insert will NOT solve problems with

depth sounding or fish finding.

• Determine which instructions to follow, either A or B, by looking at your multisensor. If your multisensor has one cable, follow instructions A on page 2. If your multisensor has two cables—

one from the depth transducer and one from the speed/ temperature insert—follow instructions B on page 3.

• If these instructions are followed carefully:

• The connections will not corrode

• The strain relief grommets will be water resistant and provide

excellent cable retention.

Before Installing

1. Be sure your new speed/temperature insert is the correct replacement. Compare the length of the new insert with the original insert (ignore the cable). If the new insert is more than 3mm (1/8") longer or shorter than the original insert, return it. To obtain the correct insert, see “ Replacement Parts” on the back of your multisensor’s owner’s guide.

2. Check the multisensor’s connector at the echosounder for corrosion. If the connector’s pins are corroded, clean them. Then test the multisensor to see if the problem has been corrected.

3. Check the speed and temperature functions of the new insert. Connect it to the echosounder and spin the paddlewheel. Check for a reading of several knots. Check for the approximate air temperature. If there is no reading(s), check the connection and repeat the test. If there is still no reading(s) or it is inaccurate, return the product to your place of purchase.

cap

terminal block screw (2)

grommet (4)

large diameter sleeving

terminal screw (16)

terminal block

mounting screws

small diameter sleeving

Figure 1. Junction box and contents

connector

mounting screws

tab (2)

black sleeving

Tools & Materials

Safety goggles Dust mask Pencil Drill Drill bit: 3mm or 1/8" Screwdrivers: Phillips and blade Box-cutter knife (zip-cable installation) Cutting pliers Masking tape Marker Wire strippers Alcohol Crimping pliers (nine or ten-wire cables) Anti-fouling paint (water-based) (mandatory in salt water) Silicone lubricant or petroleum jelly

Mounting Location

1. Remove the red cap from the junction box and set the contents aside (see Figure 1).

2. Select a convenient dry mounting location along the multisensor’s cable route, preferably 1– 1.5 m (3–5') from the multisensor but no more than 3m (10').

3. Position the junction box so the grommets are easily accessible to the cable. Mark the location of the mounting holes.

4. At the marked location, drill two 3mm or 1/8" holes approximately 10mm (3/8") deep. Do not fasten the junction box in place at this time.

speed/temp half of zip-cable

Figure 4. Preparing the cables

cable jacket

AIRMAR TRANSDUCER CABLE C344

colored wires

bare wire

folded stripped end

(contains red, green, brown,

echosounder

(printed half)

white, and bare wires)

zip-cable

depth-transducer

half of zip-cable

Figure 2. Splicing a zip-cable multisensor

zip-cable that is labeled

“Airmar Transducer Cable”

Cut the half of the

Preparing the Cables

3-5

5-75-7

insert

multisensor

A. One Cable (Zip-cable) Multisensor

CAUTION: Do not cut the depth-transducer half of the zip-cable.

CAUTION: Do not puncture unused grommets.

1. Disconnect the multisensor from the echosounder.

2. On the junction box, use a small Phillips screwdriver to puncture the center of both grommets marked 5-7 and one grommet marked 3-5 (see Figure 2).

3. The multisensor’s cable is actually two separate cables joined together. This type of cable is called zip-cable. Near the mounting location of the junction box, separate the two halves of the zip-cable. Carefully cut them apart with a box-cutter knife for a distance of 0.5m (18"). Start at the junction box location and move toward the sounder. Cut only the insulation between the

halves. DO NOT cut into the cables and expose the wires inside.

4. After you have separated the zip-cable, notice that one of the halves is printed with the words “Airmar Transducer Cable” (see Figure 3). The printed half of the zip-cable contains the speed and temperature functions. Cut only the speed/temperature half of the cable near the junction box. The wires inside will be red and green. DO NOT cut the depth-transducer half of the

cable.

Figure 3. Cutting the speed/temperature half of a zip-cable

Figure 5. Pushing a cable through a grommet

Do not cut the

unmarked half

remove outer jacket and foil shielding

5 -7

6cm (2 1/2")

5 -7

13mm (1/2")

NOTE: If the wires inside the cut-half of the cable are blue, black, and orange, you have cut the depth-transducer side by mistake. Now cut the speed/temp half of the zip-cable. Because the depth-transducer cable has been cut, you will need to splice it back together (see Figure 9). Puncture the center of the remaining 3-5 grommet. Prepare the cut ends of the depthtransducer cable (see Figure 10). If you have a nine or ten wire cable, use crimping pliers and the crimp connectors supplied. Also use silicone lubricant or petroleum jelly to ease sliding through the grommets.

5. Label the cables as follows with tape and a marker (see Figure 2).

• Cable A—cable to echosounder

• Cable B—cable to multisensor

• Cable C—new speed/temp insert cable

6. Cables A and B—Strip 6cm (2-1/2") of the outer jacket and foil shield from the cut ends (see Figure 4).

7. Cable A—Strip 13mm (1/2") of insulation from the end of each colored wire.

8. Cable B—Only the bare wire will be used. Cut-off all the colored wires.

9. Bend the stripped wires of each cable back against its cable jacket (see Figure 5). Apply alcohol to the cut end of each cable jacket to ease sliding. (Do not use any other lubricant to ease sliding. It will interfere with sealing the grommets.) Push about 20cm (8") of each cable through the appropriate grommet until all the wires are inside the junction box (see Figure 2). Bend the wires back to their original position (see Figure 5).

10.Slide a black sleeve over each bare wire and position it against the cable jacket. For ease in holding the sleeves in place and connecting to the terminals, fold the stripped ends of each wire in half. Twist the ends and bend them 90

° (see Figure 4).

11.Go to “Connecting & Testing” on page 3 and follow the instructions.

+ 2 hidden pages

Airmar B744V User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual