BOW THRUSTER BT100Kgf

23 BOW THRUSTER BT100Kgf

As a first check, rotate the propeller by hand, which has to

3 ELECTRICAL INSTALLATION

Nuts

15Nm/11lbft BT100 12Vdc

rotate freely, even though it is connected to the motor shaft.

Nuts

15Nm/11lbft BT100 24Vdc

Main Switch

(A)

Battery

Main Switch

(A)

Battery

Fuse (B)

ATTENTION!

The maximum duration of operation and the thrust indicated in the technical data are based on the relative recommendations of the battery capacity and the length of cables.

The use of higher capacity batteries in combination with short cables and large cross section cables than recommended, will increase the thrust. In such case reduce the maximum operating time, to prevent from damaging the motor.

In extreme case, for example, when batteries with 5 volts capacity or more than that suggested are utilized, there is the danger that the security shear pin breaks more frequently

Fuse (B)

Fig. 31

Also there is the danger that one or both shafts coupling get damaged permanently:

• The coupling between the electric motor shaft

and the pilot shaft on the tail piece

• The coupling between the propeller shaft and

the propeller.

Check that the voltage indicated on the motor tag corresponds with the voltage of onboard. Position the batteries or place them as close as possible to the bow thruster. The supply cable can therefore be short, reducing to a minimum the voltage drop.

Its important to utilise adequately sized cables and batteries with elevated capacity at cold for the supply of the unit because is the effective voltage in correspondence with the motor when the unit is operated which determines the revs of the motor and so the thrust.

The following list indicates recommended dimensions for cables and batteries (Tab. 1):

Minimum Dimensions for cables and batteries.

Current absorbed

Minimum battery capacity recommended (cold starting capacity according to DIN STANDARDS)

Maximum cable length from batteries to the bow thruster and return in meter [m] given the cable section (mm

2

) mm

2

25

650 A 12Vdc

420 A 24Vdc

35 50 70 95 120

1060 CCA DIN (12 Vdc)

500 CCA DIN (24 Vdc)

150 175

12 Vdc m N/R N/R N/R 6 8 12 15 20

24 Vdc m N/R N/R 10 20 25 35 40

Maximum cable length from batteries to the bow thruster and return in feet [ft] given the cable section (AWG)

AWG

3 2 1 0 00 000 0000

N/R

2x0000

12 Vdc

24 Vdc ft ft

N/R

N/R

N/R

N/R

N/R

35

15

48

20

60

28

80

35

95

45

N/R

A main switch (A) capable to take the load without losses has to be connected in line to the main positive supply, in a way that the unit could be isolated independently from other equipment on board when no one is on board or in case of emergency. This has to be installed in an easily accessible place and on the instructions of the boat has to be noted that this has to be turned off as well as other main switch on board.

(Fig. 31).

We recommend also installing a fuse (B) on the positive as a protection against short circuit of the main cables. Such fuse must be of premium quality that is its standard explains the physical quality dimensions, which fuse offer low voltage resistance with respect to other simple smaller fuses. The fuse must be of a slow blow type and dimensioned in such a way that it can resist the nominal current for at least 5 minutes.

The fuse must be of a slow blow type and dimensioned in such a way that it can resist the nominal current for at least 5 minutes.

24

The end of the cables must be terminated with terminals and these must be well insulated, excluding any contact with any other contact point that can be connected.

CONTROL PANEL AND ACCESSORIES

Tight the M8 screws with a torque of 15Nm/11lbft (Fig. 31).

CONTROL PANEL

Fig. 32

Electric Motor

DELAY SWITCH

MODEL DESCRIPTION

BTJOY Bow thruster Control panel with Joy Stick

BTINT Bow thruster control panel with switch

BTRIT/12 Delay switch kit 12V

BTRIT/24 Delay switch kit 24 v

BTINT

BTJOY

CODE

15726

15727

12214

12215

Blue Cable

BTINT BTJOY

White Cable

Fig. 33

BTRIT

Install the control panel on the dashboard. A free space of at lease 50 mm must be left free behind the panel. (Fig. 32).

Install the coupling cable between the bow thruster unit and the control panel from the internal of the boat and connect the plugs. If necessary cut the cable and re-connect ensuring that the cables are placed according to colours.

N.B. The cable colours could be different from the coupling cable utilized on the motor or on the control panel!

Its possible to install a delay switch between the bow thruster and the control panel (BTRIT), which will give the time necessary to the electric motor to stop from rotating, when in a single moment switching from port to starboard and port again.

If there are two stations, the second can be connected to the first.

If it happens that during testing the direction of thrust does not correspond with the direction of the switch on the control panel, the blue cable (A) and the white cable (B) on the relay must be inverted (Fig. 33).

ATTENTION!

Do not test the Bow-Thruster when the boat is out of water, or at least you are sure that no one is close to the tunnel. When the boat is out of water do not operate the motor for more that 5 seconds.